How Lawn Mower Blades Cut Grass (at 50,000 FRAMES PER SECOND) - Smarter Every Day 196

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  • Опубликовано: 23 дек 2024

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  • @ZetPerson0
    @ZetPerson0 6 лет назад +4024

    At 6:03 my stepdad walked in and told me to go mow the front yard

    • @huntcringedown2721
      @huntcringedown2721 6 лет назад +64

      Hey Smarter Everyday. I really Hope you will find my comment. I need ya to rewatch your Rolling. shutter video and consider how is it 4D. I made a comment but it drowned in thousands of others so I will just past IT here. I know you will get what I mean.
      "SMARTER EVERY DAY, we think similar, I know you can analyse this topic well so PLEASE do:
      Consider this. This is actually badly made 4D video. Assumimg that time is the forth dimension we as the 3D creatures can see only points (like frames or pictures). Like stick is a never ending road for an ant (like time for us). There is infinite amount of dots (points) on the line but only when you see all of them at the same time you can spot the line. The same thing with time. These videos show you not only where the string was at this specific second. It also shows you where it was at every other milisecond. This is an actual 4D !!!"

    • @chrishansen9323
      @chrishansen9323 6 лет назад +8

      *Thanks for reminding him

    • @mrcow202
      @mrcow202 6 лет назад +21

      This is no surprize though, i pooped while writing this comment and didnt sign a press release. Get real man! 1.3 million people watched this video so far. It was bound to happen to someone.

    • @jesussuperlightchris5797
      @jesussuperlightchris5797 6 лет назад +5

      Seemed rubbish explanation, seems just brute force.

    • @trayble5907
      @trayble5907 6 лет назад

      ZetPerson mmm

  • @benjaminwarren1577
    @benjaminwarren1577 5 лет назад +1620

    walks into barbershop
    Destin: you know lawn mowers?
    Barber: say no more

    • @patrickcook2013
      @patrickcook2013 5 лет назад +10

      i was the 100th like.. youre welcome

    • @randomhunter1236
      @randomhunter1236 5 лет назад +5

      I was 323rd, you're welcome

    • @outra5810
      @outra5810 5 лет назад +7

      i was not 420, you're not welcome

    • @981porsche3
      @981porsche3 4 года назад +7

      I was the somewhere between the 76,000th and 77,000th like. And nobody cares 🤷‍♂️

    • @jaredellison326
      @jaredellison326 4 года назад +1

      651st like and very ambivalent

  • @Spiderbro8
    @Spiderbro8 5 лет назад +722

    I'd love to see how a scythe cuts grass. Does the curvature of the blade help or is it just for shape ? What's the technique etc

    • @whatthewhat11
      @whatthewhat11 5 лет назад +41

      Not sure how the curve helps, if at all. I do know scythes need to be much sharper than a mower blade, like kitchen knife sharp. They also need to be honed very often while in use

    • @phillip3696
      @phillip3696 5 лет назад +47

      the curve is because you kind of swing it around yourself and because your arms draw a curve the blade has to be that too
      the grass is getting cut due to the slicing movement

    • @clivehorridge
      @clivehorridge 4 года назад +17

      grassynole07
      Speed is the key, blade to ground speed.
      Fast and consistent, it’s an inertia tool.
      Of course the blade should be razor sharp, done with light strokes of a fine grade stone every 4-5 minutes of cutting time.
      An impressive tool in the right hands, and the movement is all in the knees and hips.

    • @johnstarkie9948
      @johnstarkie9948 4 года назад +14

      whatthewhat11
      A scythe is slicing tool, like a Katanga.
      The curve is so that the scythe blade hits the grass blade at a very small angle, about 10degrees, and slices it.
      The cut swathe is less wide than the scythe blade.
      It is not an inertia tool: an experienced user can move the blade quite slowly.
      This is quite different from the rotary mower blade, which hits the grass blade at about 90degrees and so depends on speed and inertia. The cut swathe is as wide as the blade is long.
      I was taught to use a scythe by my father, who (65 years ago) used it for mowing hay, and by the gardener at the Manse who used a scythe to mow the squire’s lawn (A British lawn; grass 0.5 inches).

    • @Incredibletoo
      @Incredibletoo 4 года назад +2

      Don’t think it was invented for cutting lawns .

  • @Trailtrekker24
    @Trailtrekker24 6 лет назад +679

    Your sound guy did an awesome job on this one!

    • @smartereveryday
      @smartereveryday  6 лет назад +36

      Gordon from A Shell In The Pit Audio is amazing. Did you know you can follow him on Spotify? I'd love it if you did. My favorites are "Mountain" and "Rings in Rings in Rings"
      open.spotify.com/artist/0HIiXblDOFPXxkuI35wOMx

    • @drizzlingrose
      @drizzlingrose 6 лет назад +38

      yeah, ever since that video where he showed how the sound is made, ive appreciated the sound design a lot more in the slowmo videos :D

    • @skylarker9
      @skylarker9 6 лет назад +2

      Great job!! My fathers old gravely walk behind had horrible air flow. 60 years old with years of brush hogging. When we straighten up the cowlings around the perimeter the cut improved tremendously.

    • @shaunsurname8275
      @shaunsurname8275 5 лет назад +1

      @@gregkinney2565 glad it's not just me who noticed that

  • @admiralshwartz3956
    @admiralshwartz3956 4 года назад +475

    “Don’t modify your lawn mower”
    Project Farm: *heavy breathing*

  • @Nictator42
    @Nictator42 6 лет назад +436

    I love how Destin can turn something as simple as how a lawnmower works into a fascinating hands on science experiment

    • @smartereveryday
      @smartereveryday  6 лет назад +30

      Because IT IS a fascinating hands on science experiment!

    • @charstringetje
      @charstringetje 6 лет назад +8

      Simple? I think its ex scythe ing!

    • @Luka-xx5ve
      @Luka-xx5ve 6 лет назад +1

      I just wanted to comment that, things we dont even think about are amazing.

    • @WiseWik
      @WiseWik 6 лет назад +1

      Who said it's simple? You just don't understand the complexity of the world created around you.

    • @SoybeanFarmer3300
      @SoybeanFarmer3300 4 года назад

      @@Luka-xx5ve - it's like someone else did all the thinking and we were just amazed. yea, it happens.

  • @Dirtmonkey
    @Dirtmonkey 6 лет назад +292

    Lets do a collaboration on a stump grinder. We can show how the teeth disintegrate the wood as they grind the stump away. That would be perfect for a slow mow sequence. I have a brand new one we can use. I've done a few heavy equipment videos like that and have plenty of gear to test out.

  • @slewp
    @slewp 6 лет назад +56

    i love you Destin. Your personal hype for figuring stuff out is infectious. These videos, for many reasons, are some of the best pieces of content on the internet.

  • @michaelduffy90
    @michaelduffy90 4 года назад +110

    Destin: Mowers don’t cut like scissors.
    Reel mowers: Am I a joke to you?

    • @achilleonv
      @achilleonv 4 года назад +4

      The first thing I thought of when I saw this video last night. I wonder if he is aware of this since making the video.

    • @Seriouslydave
      @Seriouslydave 3 года назад +2

      Haybine.

    • @andyalbrecht4284
      @andyalbrecht4284 3 года назад

      Beat me to it!!!

    • @johnjornod6429
      @johnjornod6429 3 года назад +3

      Obviously many people thought the same as me. The neighbor across from my parents mows his acre with 5 reel mowers he pulls behind his riding mower that is just pulling. He says it cuts sharper and straighter and from how manicured it always looks I'd have to agree. I think some golf courses use these as well.

    • @somaday2595
      @somaday2595 3 года назад

      @@johnjornod6429 Fairway and greens- Reels..cut more evenly and closer to the ground. Rough - Rotary. The reel mower blades are harder to sharpen and require more overall maintenance from what I have been told.

  • @JakerMB
    @JakerMB 6 лет назад +167

    I just watched a 10 minute video about mowing grass and didn't get bored. You know how to make a good video!! @smarter every day

  • @thechewyMCchewy
    @thechewyMCchewy 5 лет назад +141

    10:00 pm : just one more video
    3:00 am : how lawn mower cuts grass

    • @piffelpaff7297
      @piffelpaff7297 5 лет назад

      So you have the UTC Timezone

    • @pags5zonda623
      @pags5zonda623 5 лет назад +3

      Currently 9:57pm. I know that you've just described my night

    • @jeremyneu5799
      @jeremyneu5799 5 лет назад +4

      @@pags5zonda623 currently 2:56 am est just clicked on this video, the prophecy is true.

    • @Nate-bn5kk
      @Nate-bn5kk 4 года назад

      Try turning a blue light filter on your device and turning the volume to the lowest setting you can with out making it too hard to hear.

    • @prateekpanwar646
      @prateekpanwar646 4 года назад

      5:01 whoa wait... 5 I thought it's 3. By, I'm going after just this one

  • @Nighthawkinlight
    @Nighthawkinlight 6 лет назад +115

    It's true. Neighbors must mow lawns whenever a camera is rolling. I don't know how that law got on the books but it is what it is.
    edit: Also, as a former landscaper: you can get high lift blades for your mower that cut way better than your standard blades.

    • @notek_music
      @notek_music 6 лет назад +1

      Where would you find those high lift blades?

    • @PS3RatBag98
      @PS3RatBag98 6 лет назад +18

      Jackson Kotecki Your local helicopter store of course

    • @Dark0neone
      @Dark0neone 6 лет назад +1

      fuckgoogleplus lmfao

    • @mattls7918
      @mattls7918 6 лет назад

      NightHawkInLight hey dude, love your channel

    • @XenoTravis
      @XenoTravis 6 лет назад

      I wonder if it will help my lawn mower not get clogged all the time.

  • @CaptainJacksIsland
    @CaptainJacksIsland 4 года назад +424

    My barber can't even cut my hair, let alone give me physics lessons.

    • @vast5853
      @vast5853 4 года назад

      My barber get mad Bc idk what tapper means

    • @bryanestrito
      @bryanestrito 4 года назад +2

      I only got barber stories from my barber

    • @bigcountrymountainman9740
      @bigcountrymountainman9740 3 года назад +2

      Just don't let him run a lawn mower across your head and you'll be a-okay

  • @shure46
    @shure46 5 лет назад +1157

    Heck , just come watch me mow the grass , it's always in slow motion , I'm 60

  • @Dirtmonkey
    @Dirtmonkey 6 лет назад +228

    I love this series! If you want more info on this I can take you to the engineering department of Toro and take you behind the scenes. We could also do a series on Heavy equipment with Volvo.

    • @DavidLeon140m3
      @DavidLeon140m3 6 лет назад

      volvo sucks.... cat is better

    • @Dirtmonkey
      @Dirtmonkey 6 лет назад +2

      Thank you DMZ!

    • @kristianvoulopos3352
      @kristianvoulopos3352 6 лет назад

      This would be neato

    • @Tom2112Tom
      @Tom2112Tom 6 лет назад +1

      I was just going to comment that he should contact folks that manufacture lawn mowers and talk to a mower design engineer. Quit guessing and ask the people who already know.

    • @AlejandroFerrariMc
      @AlejandroFerrariMc 6 лет назад

      Please, make this happen!!

  • @bigfootandbananaman4746
    @bigfootandbananaman4746 6 лет назад +479

    I want to see a chainsaw. It wouldn't be cool in wood(because wood is opaque) but maybe in clear plastic. I have always wanted to see the blade in slow motion tearing away wood chips

    • @trentguymon
      @trentguymon 6 лет назад +20

      A circular saw would be cool too, especially if you could see how each tooth cuts from a different side.

    • @Tigerskunk
      @Tigerskunk 6 лет назад +12

      Bigfoot And Bananaman for some insight. I would not say that chainsaw tears away the wood. It's more of a wedge that shaves the wood. Each tooth on the Chain just shaves a little more off as it's pulled through the wood. Similar to a wood plane shaving wood off. Circular saws do the same thing.

    • @nerdygamer11
      @nerdygamer11 6 лет назад +9

      I rarely bother to comment on RUclips videos, but I came down here to also request chainsaw footage.

    • @WhoDatBoudreaux
      @WhoDatBoudreaux 6 лет назад +3

      I agree with the chainsaw, including circular saws. My question would be about different chain types (not so common) or different circular saw blade types (more common). I know saw blade types are for rough cut (fast ripping) vs smooth cut (usually slower). I imagine there is a trade off between how much material you can knock off with each tooth VS bogging down the motor and loosing RPM & efficacy.

    • @jaredlapierre1304
      @jaredlapierre1304 6 лет назад +3

      I also want to see a chainsaw, a real nice gas one and maybe a comparison to a decent battery powered one. I'm curious about a few things.

  • @SwedeGuy328
    @SwedeGuy328 3 года назад +17

    This also shows why it's important to having a sharp blade while mowing, ie; cutting the grass. Great series BTW!

    • @m4rvinmartian
      @m4rvinmartian 2 года назад +1

      I'm glad I saw this near the top. Those blades were embarrassingly dull and rock pitted.
      I sharpen my blade at the beginning of the season, and then a couple times during.

    • @TheOriginalFaxon
      @TheOriginalFaxon 2 года назад +1

      Yea Destin is a smart engineer, and he has a workshop to boot, i'm surprised he didn't sharpen his blade for the video xD

    • @skohcl
      @skohcl Год назад

      Came here to see/say this... some of that grass looked sad post-cut...

  • @spencerwilton5831
    @spencerwilton5831 6 лет назад +39

    Cylinder mowers (called reel mowers in the US) have opposing blades. One is fixed to the frame, the other is wrapped around the cylinder (usually 5 or more separate blades) and as they rotate they shear the grass between them selves and the fixed blade. They make a much neater cut, and for that reason are used on fine lawns, putting greens, tennis courts etc.

    • @jeffreymonceaux5926
      @jeffreymonceaux5926 6 лет назад

      Spencer Wilton my first mower. No ethanol!

    • @SlaveToMyStomach
      @SlaveToMyStomach 6 лет назад +1

      I was going to say the same thing. Reel lawnmowers have been around, I'd say, for more than 100 years. No, I can't provide a citation. They typically have a grass catcher on the back. For a push type lawnmower the reel is driven by the wheels via a ratchet system of gears so it can continue to spin even when the wheels were stopped. The sound of the ratchet was a sure sound of summer many years ago.
      Even today, the grounds keepers for golf courses use reel type lawn mowers on the greens. A rotary blade just wouldn't do, maybe on the fairways but not the greens.

    • @VitaTuggummin
      @VitaTuggummin 6 лет назад

      oooh. thank you!

    • @donjear2226
      @donjear2226 6 лет назад +1

      They also get wracked but non-grass (sticks, rocks, toys, etc.) running through them more easily and more labor intensive, is also why they are better suited to highly manicured small areas.

    • @Sylvan_dB
      @Sylvan_dB 6 лет назад +1

      Also sickle bar mowers and similar used for harvesting hay (just drops it instead of pulverizing).

  • @AGlimpseInside
    @AGlimpseInside 6 лет назад +652

    That intro was kind of “Mythbusters” Esque... I like it!!

    • @pelufaz8435
      @pelufaz8435 6 лет назад +12

      A Glimpse Inside I think that was the point

    • @magic0418
      @magic0418 6 лет назад +18

      That legendary guitar riff!

    • @graywolf3495
      @graywolf3495 6 лет назад +12

      And the welded plate

    • @ahoes6369
      @ahoes6369 6 лет назад +3

      Esque

    • @AGlimpseInside
      @AGlimpseInside 6 лет назад

      Aubrey Hoes Thank you I made the change. Appreciate it

  • @JonathanTash
    @JonathanTash 6 лет назад +210

    Well, the most obvious thing to study next is the weed wacker, but I'm curious about the garden hose sprayer. You know, the one with the dial that you can use to switch between spray options like, shower, jet, and mist. I'd like to see an explanation of how the water breaks up and spreads out as it travels through the air.

    • @rattso6664
      @rattso6664 6 лет назад +1

      You most likely put more pressure for jet with a different pattern and less pressure for mist with a different pattern

    • @dash8brj
      @dash8brj 6 лет назад +4

      I agree - the weed whacker (also known as a line trimmer or whipper snipper) would be a great second edition to this series.

    • @paulengr
      @paulengr 6 лет назад +1

      Not exactly. Spray Systems does the science behind sprayers. The shape of the cavity is very carefully designed to get different spray patterns. A lot more to it than just pressure like turbulence and flow regimes.

    • @marieflinchbaugh3326
      @marieflinchbaugh3326 6 лет назад

      Jonathan Tash I want to see the weed wacker

    • @seanobrien7568
      @seanobrien7568 5 лет назад

      You always study whackers

  • @th3_pl3b
    @th3_pl3b 4 года назад +205

    This is the most dad video I've ever seen

  • @StraitD2
    @StraitD2 5 лет назад +511

    I learned something today too... your lawn mower blades are super dull lol

    • @tonysmith5077
      @tonysmith5077 5 лет назад +9

      I noticed that to.

    • @paulstandaert2042
      @paulstandaert2042 5 лет назад +21

      It is kinda interesting... at one of my first jobs, the guy I worked for had me use a lawn mower which was later found out to have the blade upside down. It did not cut well, but it did... far better than I ever expected it to.

    • @rogerwillis7692
      @rogerwillis7692 5 лет назад +2

      @@tonysmith5077 *too

    • @Popscotch328
      @Popscotch328 5 лет назад +13

      I just wanted to kiss those blades with a bench grinder. Or a file. For real.

    • @paulsoetaert
      @paulsoetaert 5 лет назад +6

      @@paulstandaert2042 I thought you were me lol

  • @meetim6271
    @meetim6271 6 лет назад +13

    The blade does create 'lift' (read airflow) but it's not required to cut the grass, or else line trimmers wouldn't work. The grass breaks when the blade speed is high enough that the grass can't get out of its way (inertia). The bent blade is a fan that lifts & blows the cut grass into the catcher or out a chute. That effect stops when the bent bit wears out.

  • @louispotter9051
    @louispotter9051 4 года назад +6

    No wonder why it’s harder to mow when the grass is wet. The blade can’t lift the grass up because the water/dew adds up to the weight. This is very educational. Thank you for posting this video. I highly appreciate it!

    • @uncrunch398
      @uncrunch398 Год назад

      Mine appears to cut fine. I have to stop often to clean the under side or empty the bag and clean the chute. Letting it grow too long between cuts can add to this problem or even be necessary for this to be a problem.

  • @joe-lw4nw
    @joe-lw4nw 6 лет назад +32

    A weed whacker has no vacuum so I wonder if the speed of the strings makes up for the need for a vacuum by just hitting the grass blades extremely fast. Also an analyzation of different weed whackers in slow motion would be awesome to watch

    • @PapaDutch
      @PapaDutch 6 лет назад

      The purpose of a string trimmer is to be portable but for small areas. The line wears out, but will not cut your shoes...
      That is the trade off
      The OTHER aspect of it is that a weedeater can get into DETAIL spots where you CANNOT drive or push a mower easily
      So it is truly for trimming. This is why commercial outfits use a big mower - but generally have a team of followers trimming the walks and edges

  • @LawofMoses
    @LawofMoses 5 лет назад +282

    Hey for fun you should so a slowmo to see if dandelions actually duck under the blade when you mow the lawn 😁

    • @okaylars3248
      @okaylars3248 5 лет назад +19

      i agree it's weird how they always survive

    • @juansolo1617
      @juansolo1617 5 лет назад +15

      @@okaylars3248 Try pulling your mower backward over them. They disappear. It's weird but it works.

    • @okaylars3248
      @okaylars3248 5 лет назад +7

      @@juansolo1617 ... illuminati confirmed

    • @juansolo1617
      @juansolo1617 5 лет назад +3

      @@okaylars3248 lol it took me a second but that actually sounds perfect.

    • @okaylars3248
      @okaylars3248 5 лет назад +2

      @@juansolo1617 ahahaha

  • @claythomas9467
    @claythomas9467 5 лет назад +68

    You have just confirmed my theory which I have thought about once a week every week from March through November for about an hour since I was 12.

  • @W94urndks9urneos
    @W94urndks9urneos 2 года назад +1

    You can learn from anyone if you are humble enough to ask. Great job showing this!

  • @RumbleLab
    @RumbleLab 6 лет назад +316

    A chainsaw blade/chain seems like it has some interesting science behind it. Any thoughts?

    • @jerrytomas3136
      @jerrytomas3136 6 лет назад +15

      RumbleLab
      Really fast sharp thingies 👍

    • @superdivinus987
      @superdivinus987 6 лет назад

      RumbleLab link the time

    • @SgtJoeSmith
      @SgtJoeSmith 6 лет назад +21

      RumbleLab it does. It cuts on the top not the side of chain for 1. Teeth alternate so cuts straight and not pull to the side. Ramps in between teeth so chain only cuts what it can handle without digging in and jamming. Plus chain has to remove the debris as you cut. Low kick back chains have higher ramps so you can't cut as much with each pass and won't jam as hard if it does get caught. That's based on my understanding. Sorry if I mis spoke about something

    • @boogsc9715
      @boogsc9715 6 лет назад +1

      Yeah it would be interesting to watch the material being pulled out

    • @RumbleLab
      @RumbleLab 6 лет назад +1

      Joe Smith isn't there a link that "slices" followed by a link that "digs" almost like a knife and a chisel?

  • @Keldor314
    @Keldor314 6 лет назад +208

    I'm not entirely convinced that the upward force from the lawnmower blade plays an especially significant role in the cutting part of mowing. Certainly it's useful overall, since it's what lets the lawnmower collect the grass in a bag or in the case of mulching mowers, suck it up so it gets hit by the blades again and again until it's shredded into little pieces. However, an object moving at 200 MPH will rip or cut through grass regardless of airflow. There's just too much friction against the edge of the blade and inertia making the grass fold over onto the blade as it moves past for there to be any chance of it somehow whipping back around and sliding under the blade intact.
    I'd like to see a control test with the curved lifting portions cut off to give a flat blade. Also, what if you installed the blade upside down so that it provided down force? A comparison of the quality of the lawn cut under these conditions would be very interesting! This would test the assumption that the lifting blade pulls flattened blades back up straight again so they're cut to the same length as all the others. If this is the case, doing a comparison immediately after mowing might be a mistake since any blades that were flattened by the mower may still be laying flat. Better to give it 24 hours after mowing for the wind to straighten them up again first.
    As far as I can tell, the lifting lawn mower blade is a relatively new invention. Before this, blades were presumably flat, though sadly I can't find pictures of old lawn mower blades anywhere on Google. Apparently there are no antique lawn mower blade collectors for some reason.
    Now, what about cylinder blade lawn mowers? The geometry on those makes no sense to me. How do they work?

    • @vertxxyz
      @vertxxyz 6 лет назад +12

      cylinder blade lawn mowers' paddles/blades push grass into another blade and operate like sissors in that respect.

    • @gregorybogart5200
      @gregorybogart5200 6 лет назад +43

      I can tell you as a Lawn Maintenance Provider that the lifting tab on the back of the blade makes a HUGE difference as to how well that blade will cut. If I use a "Low" lifting tab type of blade, the grass doesn't get cut as evenly or I have to make several passes over the lawn. The "High" lift tabs allow me to make a single pass. Also note that the "High-end" Commercial mower have tall decks (5"+) to maximize airflow under the deck to provide that perfect cut. Great video as always!

    • @centurion726
      @centurion726 6 лет назад

      The old rotary mowers cut like a pair of scissors as he explained in the video (cutting blade and bed knife blade), but there are commercial mowers that are in the Flail Mower category. They have a ton of little blades on a shaft/drum that spins and cuts grass like a knife cutting paper pretty heavy duty machines.

    • @dmarsub
      @dmarsub 6 лет назад +1

      i don't necessarly agree but i upvoted it for visibility.
      it is interesting to answer these questions in more depth.
      7:15 doesn't look like it cuts the grass right now.
      also the cutting efficiency heavily relies on the bility of the cut thing being able to move away. if you jus a grass blade from the side it will be way easier.

    • @ericmaedgen2352
      @ericmaedgen2352 6 лет назад +8

      Yes it is. Actually one of the most important aspects besides sharp blades. Yes it will cut, but cutting ALL the grass is the end game. And airflow will provide that. If the grass blades aren't lifted up they will just lay down never making contact with the mower blade. 26 years commercial mowing experience here.

  • @JoeCubicle
    @JoeCubicle 6 лет назад +40

    12 year lawn business owner-operator here. The blade lift is how you get a 'sweet' cut. That and a sharp blade. If you cut with hearing protection on your ears then stop and sharpen your blades to razor-sharp then start cutting with the same hearing protection on you can hear the difference. The sharp blades make more of a "swish" sound vs a "swap" sound. That's the best I can explain it. I've done this a thousand times over the 12 years I cut professionally. When I sharpened my blades I did it with a file by hand and got them scary-sharp which is not totally necessary, regular-sharp is good enough.

    • @rabie4x4
      @rabie4x4 6 лет назад +2

      Same. And blades also last a LOT longer when sharpened with a file.

    • @nathannutter3424
      @nathannutter3424 6 лет назад +3

      I literally just hand filed my blades 2 days ago...after never sharpening them over the 10+ years I’ve owned my mower! Hopefully it works better than it was!

    • @KeepItMowed
      @KeepItMowed 6 лет назад +2

      I agree. I prefer scary sharp! 😂

    • @drelliott2833
      @drelliott2833 6 лет назад

      When you sharpen the blade that sharp it will dull faster. Using a file is a good idea because a grinder causes heat weakening the temper of the blade .Also could make it unbalanced.

    • @pungpinan
      @pungpinan 6 лет назад

      Andrew Phillips ...in fear of the scary sharp blades... I got it. Makes perfect sense.

  • @davidgibson9866
    @davidgibson9866 3 года назад +29

    The scythe deserves its own segment...I’ve seen people mow a field faster than a weed eater can be fueled and started .

  • @HaunterOfKanto
    @HaunterOfKanto 5 лет назад +278

    I learned that mowers pulled the grass up from "Honey I Shrunk the Kids"

    • @tomward8640
      @tomward8640 5 лет назад +3

      HaunterOfKanto that’s a good movie 🍿

    • @herculesmclovin
      @herculesmclovin 5 лет назад +4

      Great point, well recognised! And a fun example too :)

    • @oliver__snow
      @oliver__snow 5 лет назад +1

      It cuts because the grass is wet and sticks to the super fast blades. Flymo lawn mowers blow the grass down.

    • @SeanFerree
      @SeanFerree 5 лет назад +2

      Same 😁

  • @etherealemily4901
    @etherealemily4901 5 лет назад +118

    Lawnmower blade, blade of grass
    Mowing is actually a sword fight with nature

  • @NINJABDUDE
    @NINJABDUDE 6 лет назад +307

    Why didn't you use smoke to show the airflow?

    • @hcoyhis
      @hcoyhis 6 лет назад +16

      NINJABDUDE probably too much turbulent air around the mower from ambient wind, not to mention he's shooting the video at home so what would he use for smoke? He would probably have to use smoke balls which would get sucked up into the blades unless anchored. The grass does a well enough job at showing airflow.

    • @spldrong
      @spldrong 6 лет назад +5

      NINJABDUDE yea, or put babypowder or something in the grass and see it get lifted out.

    • @MindBodySoulOk
      @MindBodySoulOk 6 лет назад +2

      I was going to suggest explosives and rupert gum drops.

    • @RumbleLab
      @RumbleLab 6 лет назад +3

      NINJABDUDE that's a cool idea but perhaps Hunter is right.

    • @rjjarecki
      @rjjarecki 6 лет назад +2

      Yeah Destin, why didn’t you make a better video?!?

  • @kirkendauhl6990
    @kirkendauhl6990 4 года назад

    I’m 25 and younger than both you and your barber and I knew that about lawnmowers from a fairly young age. I’m glad you’re still learning and finding new information without being embarrassed in any capacity about little facts you may not have considered because that’s what I aim to do when I’m your age and beyond.
    This isn’t a condescending comment either, I’m both surprised I knew something you didn’t and also inspired by your motivation to keep learning even though your career and studies have left gaps that you’re still figuring out. Keep it up, I love seeing these videos because I don’t know everything either lol

  • @VicMorrowsGhost
    @VicMorrowsGhost 6 лет назад +105

    You know what you have to do. Make your own blades without the lift tab. Check the slow mo and see if the grass doesn't stand up. Shouldn't be too hard it's just a flat slab of steel.

    • @bigwooly8014
      @bigwooly8014 6 лет назад +8

      VicMorrowsGhost better to just heat and hammer the lift edge down. Balance is very important for those blades, mainly for the integrity of the blade deck. The vibration of an unbalanced blade will eventually rip the pulleys out of the deck.

    • @hotchef1984
      @hotchef1984 6 лет назад

      Symmetrically grinding opposing blade faces across a central axis is as difficult as it sounds. Add into that keeping it balanced as the previous comment noted does not make it any easier.

    • @SgtJoeSmith
      @SgtJoeSmith 6 лет назад +4

      VicMorrowsGhost you can buy mulching blades like that. No tabs. I've had stupid employees put blades on upside down and could barely tell a difference. Rpm fast enough to still cut.

    • @joshh2860
      @joshh2860 6 лет назад +1

      Just go buy some

    • @UncleSpence
      @UncleSpence 6 лет назад +1

      He also should make a clear deck to let it do it's thing properly. Opening the hatch like that will effect the upward flow, wouldn't it?

  • @gaberouse3351
    @gaberouse3351 6 лет назад +69

    Slow-mo starts at 7:13

    • @chosenArchitec
      @chosenArchitec 6 лет назад +12

      Whew, Thank you ~ can't believe it took that long, all that yapping

    • @efdbjon2114
      @efdbjon2114 6 лет назад +3

      you have to watch the whole think if you want to appreciate the science of it

    • @iwantmytacobacc.2040
      @iwantmytacobacc.2040 6 лет назад +1

      thankyou.

    • @gaberouse3351
      @gaberouse3351 6 лет назад +2

      MJM Productions I agree 100%, but sometimes I like to watch the slow mo first so I can think about the footage while he discusses it throughout the video.

    • @TheSpiffyNeoStar
      @TheSpiffyNeoStar 6 лет назад +1

      *Slow-mow.

  • @Forssa1
    @Forssa1 6 лет назад +74

    You just went with your assumption that your hypothesis was correct; that the blade wing is what makes it work. You never tested it without.

    • @989567567
      @989567567 6 лет назад +11

      Yes that is what I thought. Please cut the wings and compare the results to show the effect. At 5:50 I thought the grass could also be lifted by its own stiffness.

    • @Highstranger951
      @Highstranger951 6 лет назад +1

      He doesn’t have to because it’s not an assumption, it’s fact.

    • @Forssa1
      @Forssa1 6 лет назад +6

      Then show me.

    • @jpe1
      @jpe1 6 лет назад +8

      Highstranger951 that is not how science works. Hypotheses are considered potentially factually true after empirical testing, not before.

    • @Highstranger951
      @Highstranger951 6 лет назад

      Forssa1 do your research guys.

  • @greenshui
    @greenshui Год назад

    How wonderful! As an engineering student, I always wondered what was going on under the lawn mower engine. Thanks for the remarkable video.

  • @devonwilcock155
    @devonwilcock155 6 лет назад +461

    Anyone else wanna see a weed whacker in slow motion?

    • @laurenm1630
      @laurenm1630 6 лет назад +2

      Yes

    • @terrimorrison8888
      @terrimorrison8888 6 лет назад

      Yes

    • @Zuul47
      @Zuul47 6 лет назад

      Yes

    • @JurgenUffink
      @JurgenUffink 6 лет назад +2

      Jup, with wire and blade please :)

    • @Andy81ish
      @Andy81ish 6 лет назад

      Not just wire and blade but there are two types of wire, round and the twisted square type. Why is one better then the other?

  • @okiemale1589
    @okiemale1589 5 лет назад +159

    Reel type lawn mowers do shear like scissors....
    They have rotating blades that shear against a bed knjfe....

    • @lennartvanschuilenburg3430
      @lennartvanschuilenburg3430 5 лет назад +7

      Okie Male hahahaha I was thinking the same thing when he was talking about it....... he lost his point right away in the first minute 😂

    • @lennartvanschuilenburg3430
      @lennartvanschuilenburg3430 5 лет назад +1

      Cool video en sound effect btw

    • @johnpike9612
      @johnpike9612 5 лет назад +15

      They also make sickle mowers that work like barbers clippers.

    • @Pete-z6e
      @Pete-z6e 5 лет назад +3

      Okie Male , and boy! do they do a good job.!

    • @hotsauce2446
      @hotsauce2446 5 лет назад +4

      I was thinking the exact thing about reel mowers when he was talking about that

  • @EmilBrikha
    @EmilBrikha 6 лет назад +7

    I can’t believe I just watched a 10 minute video about mowing. I also can’t believe I was intrigued. You sir are my favorite hillbilly in the world 😂 and the world needs more of you.

  • @durangodave
    @durangodave 3 года назад +1

    Another great video, thanks. At 7:23 if you look close at the left over grass (or shorter old grass) after the cut, your blade is ripping the grass because its a dull blade. Thats how the grass gets the brown jagged ends because of a dull blade which opens the door to grass disease and harder / longer to heal, so your causing unhealthy grass as well. Professionals may carry several blades with them and even switch them out during the busy day of mowing if they see this effect.

  • @JustinSchmidt
    @JustinSchmidt 6 лет назад +189

    I felt itchy for you... 0:30

    • @wormsyy9004
      @wormsyy9004 6 лет назад +1

      Justin Schmidt hahe

    • @giselle232008
      @giselle232008 6 лет назад +8

      I'm allergic to grass and all I could do is cringe and scratch lol

    • @dylannewton8934
      @dylannewton8934 6 лет назад

      Lol

    • @stacksack6060
      @stacksack6060 5 лет назад

      Yes

    •  5 лет назад +1

      Why would grass make you itchy? it's soft.

  • @Chrispmiller84
    @Chrispmiller84 6 лет назад +27

    Remember the old trick where you unfold a newspaper and lay it across half a ruler. If you hit the ruler fast enough you could break the ruler in half. The speed you hit the ruler at was just too fast for the newspaper to lift up, so the ruler broke. This is how lawnmower blades work. It's speed, not lift. I mean, the lift does help in various ways, but it's certainly not a pivotal part of the process. Please do a video with perfectly flat and straight blades and see what happens. I bet you it'll cut grass pretty well.

    • @dbgarlisch
      @dbgarlisch 6 лет назад +6

      Destin, I think you got this one wrong. I agree with Chrispm84. I assert that this is a turbulence + momentum phenomenon. Not a suction one.
      The little blades of grass are whipping around in the turbulence and eventually get hit by the mower blade. The mower blade is moving so quickly that the grass can't move out of the way (due to momentum) and get chopped.
      I would also suspect that some grass blades require two or more hits before they are chopped down to the mower blade's height.

    • @jakkank
      @jakkank 6 лет назад +4

      david garlisch I think Destin is over thinking this. Where I live we don't use lawn mowers but grass cutters. It's basically a high speed fan on a stick that spins a thick nylon(can use steel blades but nylon strings are safer since you arent in danger of a blade chipping) very fast to cut grass and it cuts pretty well. No suction, no wind.

    • @WhoDatBoudreaux
      @WhoDatBoudreaux 6 лет назад +4

      I'd also point out that when using larger farm equipment (good ole bush hog), those blades are elongated chunks of iron swiveling around under a shroud. I don't think there is much of any lift in that equation. It's more like bludgeoning the grass until it short.

    • @Justin-ou6gq
      @Justin-ou6gq 6 лет назад +2

      Yeah I think it's more of an inertia effect

    • @ecoloqito
      @ecoloqito 6 лет назад +1

      Chrispm84 Well yes, but what I believe the lift does beside help a little with the cut is eject the grass so is "clean" enough to keep cutting without interference. Thought I've seen mowers with straight blades.

  • @nerdyhustle
    @nerdyhustle 6 лет назад +917

    1.7K blades of grass have disliked this video.

  • @CarlIngersoll
    @CarlIngersoll Год назад +1

    Lawn series: Does a drop spreader spread more fertilizer when it's full (compared to the last quarter before empty)?
    Why do some garden hoses kink and others don't?
    Does a sprinkler apply water evenly, or more in some areas?
    Is a reel mower like a pair of scissors?
    How does an aerator really let the air flow in, although the holes are far apart?
    How can you reduce evaporation on your lawn?
    How does cutting your awn to different heights affect evaporation, spreading of grass plants, wear resistance, weeds...

  • @PHX787
    @PHX787 6 лет назад +18

    lawn tool series... a slow-motion video of one of those hammer-type sprinklers! I know it's fluid dynamics and the force of the hammer that moves the sprinkler back and forth....but man, i would love to see how that looks in slowmo!

    • @WhatIsKenDoing
      @WhatIsKenDoing 6 лет назад +1

      Or better yet, one of those giant water cannon sprinklers they use on farms!

  • @DanielBisagni
    @DanielBisagni 6 лет назад +72

    Oh you have to do how a chainsaw blade!!!!!! Please please please do a chainsaw blade!!!love this series idea.

    • @HDDcam73
      @HDDcam73 6 лет назад +1

      Daniel Bisagni that was my first thought too

    • @tannerbeverley26
      @tannerbeverley26 6 лет назад

      Daniel Bisagni going with the grain, vs against

    • @kato249
      @kato249 6 лет назад +1

      Especially looking into cutting edge angles and cutting depth and why they should be adjusted for the type of timber being cut.

    • @PapaDutch
      @PapaDutch 6 лет назад +1

      A saw chain is an intricate mechanism made of many moving parts - that having been said, there are many videos on how to sharp a chainsaw chain - it is complex and I will not detail it here because it has been talked about elsewhere, most notably by "Swedish Homestead" at YT

    • @southaussiegarbo2054
      @southaussiegarbo2054 6 лет назад

      Tanner Beverley they cut trees down across grain I belive

  • @JackBoii
    @JackBoii 6 лет назад +8

    Do double blade (rotating in different directions) lawn mowers exist ?

    • @DavidPhillipsAustin
      @DavidPhillipsAustin 6 лет назад +7

      A reel type mower moves a blade against a fixed anvil, much like scissors where you keep one half stationary. There are also brush cutters that work like giant barber clippers.

    • @JackBoii
      @JackBoii 6 лет назад

      David Phillips Thanks

    • @eherrmann01
      @eherrmann01 6 лет назад +2

      Walker makes opposing blade mowers. the mower has a box on the back to catch the clippings and a chute under it with an impeller that sucks up the clippings and deposits them in the collection box.

  • @alexgrigoreas4825
    @alexgrigoreas4825 3 года назад +2

    Excellent video to show how important it is to keep your mower blades sharp.

  • @sdmarlow3926
    @sdmarlow3926 6 лет назад +9

    It's not to "pull the grass up." The lift is designed to expel/discharge the clippings, unlike mulching blades, that have less of the lifting force and are designed to make secondary cuts.

  • @MiniPeugot
    @MiniPeugot 5 лет назад +184

    Youre barber is a lowkey mechanical engineer. Times must be tough

    • @ianzurek6984
      @ianzurek6984 5 лет назад +8

      Maybe being a barber was his true passion or just a more chill job as you get older and have acquired a hefty retirement already.

    • @ianzurek6984
      @ianzurek6984 5 лет назад +2

      or times are hard too lol

    • @djjazzyjeff1232
      @djjazzyjeff1232 5 лет назад +15

      It's like Mike Rowe says. There's no reason why a plumber can't quote Friedrich Nietzsche, and there's no reason a philosopher can't fix his own bathroom.

  • @XPStartupSound
    @XPStartupSound 6 лет назад +145

    What about a manual lawn mower with no engine?

    • @woodsy900
      @woodsy900 6 лет назад +21

      Matthew Shultz that uses the same principle as scissors or the two blade method

    • @JMadoreTutorials
      @JMadoreTutorials 6 лет назад +8

      That's a rotating scissor/shear at work there.

    • @nathanr5846
      @nathanr5846 6 лет назад +2

      Do you mean like an old fashioned push mower?

    • @rdmsh
      @rdmsh 6 лет назад +4

      Here’s a video of mine cutting paper ruclips.net/video/qxDO6aSbSGM/видео.html

    • @MesquiteAutomotive
      @MesquiteAutomotive 6 лет назад +6

      They're called reel mowers. They have a back edge and work like the scissors do.

  • @evans.1448
    @evans.1448 2 года назад

    Just watching that first clip of the mower cutting grass in slo-mo was well worth it. Amazing work, as usual!

  • @HowToGuys
    @HowToGuys 6 лет назад +105

    "No Grass is harmed during this video?"

    • @EPhotoAlbum
      @EPhotoAlbum 6 лет назад

      Kedar Nimbalkar that's funny

    • @shrekdonkey9551
      @shrekdonkey9551 6 лет назад

      Tell that to my ripped meat eating friends that dont like u messing w there food’s food

  • @Mockturtlesoup1
    @Mockturtlesoup1 6 лет назад +20

    I would be interested in seeing a video(or segment) on the old school rotary style lawn mowers(the sort of barrel shaped ones with no motor.)
    I used to do lawn care(fertilizer, pesticides, etc.), and every class I took(often from people with post grad degrees in agronomics) and all my bosses, and everything I've ever read claimed that those are actually superior to the tradition walk-behind/ride-on spinning blade mowers.
    supposedly they cut the grass much cleaner, as opposed to tearing the grass the way rotary mowers can do(if you look closely in this video, you can see the blades of grass are often raggedy at the ends after being cut(though this could possibly be due to a dull mower blade.))
    this is bad because it hurts the appearance of the lawn(the tips are stringy and discolored), and also because it causes the plant to use more energy fixing the "wound", does more damage to the cells, causes a greater loss of moisture, and in particular makes the grass much more susceptible to disease(just like how getting your hand cut off by a shark, or chainsaw is more likely to become infected(due to the much larger surface area of exposed tissue) than getting your hand cut off by saw, a single clean slice by a very sharp samurai sword.))
    however, I do not know why the rotary mowers cut more efficiently. I doubt they cause much of the suction you refer to in this video, and I can't help but think the blades are traveling far slower. it also seems like each section(or even blade) of grass would only have one chance to get cut with a rotary mower, whereas the rotating blade mowers(even though the cutting surface of the blade is only a few inches long at the extreme end of each side of the blade) has several chances to cut each blade(depending on how fast you are going) and thus is less likely to leave little "mohawks" of uncut grass behind.)
    I suppose it could be due in part to the fact that the blades on rotary mowers are moving more or less straight in into the grass(almost like a scythe) whereas the blades on the type of mower in this video are rotating in an angular fasion, and may be more likely to "rip" the blade as opposed to making a clean cut, but since the blade is moving so fast, and the moment of contact between the blade and any individual piece of grass is so incredibly brief, I can't help but think that the direction/way the blades are moving would make no difference(if the blades were cutting right near the center of blade, where the linear velocities would be lower, then maybe.)
    the only other thing I can think of is that maybe the blades on drum style rotary mowers are sharper(please sharpen your mower blades regularly people), possible due to them being just simple pieces of think stamped metal(at least I think they're stamped, i could be wrong.)
    wow. god bless whoever took the time to read that ridiculously long comment about lawn mower blades. lol.

    • @dbeierl
      @dbeierl 6 лет назад +6

      The reel-type mower works exactly like scissors, by trapping the grass between the blades on the spinning reel and a fixed cutter bar.

    • @Mockturtlesoup1
      @Mockturtlesoup1 6 лет назад +1

      ooooooh. lol. you'd think I should have known that. no wonder it works so good.

  • @KrisBendix
    @KrisBendix 6 лет назад +63

    Also this one is called - SlowMo-wing.

  • @alejandrosalazar6975
    @alejandrosalazar6975 4 года назад +55

    “You’ve spent a ton of your life on a lawn mower”
    New Yorkers: am I a joke to you

    • @davep6977
      @davep6977 4 года назад +5

      New Yorker: what's a lawn?
      Grass? isn't that something you buy

    • @gavinkvinlaug692
      @gavinkvinlaug692 4 года назад +2

      I like in NY on a farm and mow 10 plus hours a week

    • @alejandrosalazar6975
      @alejandrosalazar6975 4 года назад +1

      Gavin Kvinlaug NYC

    • @gavinkvinlaug692
      @gavinkvinlaug692 4 года назад +2

      @@alejandrosalazar6975 ok but u didn't specify

    • @joshuar3632
      @joshuar3632 4 года назад +1

      Yea dont lump the rest of the state in with the "California of the east" (nyc is its own mess that ruins it for the whole state.)

  • @silasmayes7954
    @silasmayes7954 6 лет назад +118

    For the grass what is the healthiest way to cut the grass? How do weedwackers and edgers work? After this video, I'm not convinced it's as simple as I think it is.

    • @justadbeer
      @justadbeer 6 лет назад +14

      I believe the old style "reel" mowers are the best for getting a good clean cut but those things went out some time in the 60's when i was a kid cuz they were also so dangerous. Now the only place I see the powered ones used is for mowing the greens at a golf course.

    • @dangerrangerlstc
      @dangerrangerlstc 6 лет назад +21

      Yes, reel type mowers slice the grass like scissors instead of rotary motors which beat the grass into submission.
      Reel type mowers require more maintenance and finer adjustments more than just being dangerous. It's easy to make them safer, but because the blades have to be kept very sharp and clearance between the blades have to be adjusted, that's more than the average homeowner is capable or willing to do. Rotary mowers take less maintenance and are more reliable.

    • @cowardly_wizard
      @cowardly_wizard 6 лет назад +10

      weedwackers do just what their name implies. they spin very quickly and whip at the stuff you poke them at. Grass is very ridged at that speed and it shatters or explodes where the line hits it. To me the spray off of a lawn mower or weed wacker always feels damp from the aerosolization of the liquid in the stalks

    • @hardlyb
      @hardlyb 6 лет назад +2

      Probably a pair of scissors is the best for the grass, because most of them will never get cut! Realistically, a reel mower does the least damage to the grass, and the manual ones give you quite a workout on even a very small yard. Makes you learn to keep the blades sharp and properly adjusted, too, as it's even harder to push when they are dull.

    • @MidnightMarrow
      @MidnightMarrow 6 лет назад +4

      Best thing for grass is the good old fashioned Scythe. Proper technique means it's not too short and just the simple way it cuts via the extremely sharp blade as it all funnels into it.

  • @anasmrright
    @anasmrright 6 лет назад +79

    A grazing cow will also lift and chop the grass leaving a nice short lawn. Thank goodness they don't spin at 200 mph.

    • @fhdhdhfjdjdjd444
      @fhdhdhfjdjdjd444 6 лет назад

      anasmrright what, are you afraid of lawn mowers?

    • @korishan
      @korishan 6 лет назад +1

      ROFL!! 😂
      If it did, make sure to dump buckets of chocolate over it first

    • @BrassStacks
      @BrassStacks 6 лет назад +3

      anasmrright , You ain't ever been in a twister, have ya!? 😁

    • @Gloworm17
      @Gloworm17 6 лет назад +1

      Twister (1996) Anyone? Cows do spin in the air. Sometimes multiple times. (The 200 mph moo)

    • @fmkwvejf
      @fmkwvejf 6 лет назад +4

      Lawn mooers

  • @brianriddle8389
    @brianriddle8389 6 лет назад +17

    Smartereveryday please try reversing the flap direction on a lawn mower blade in order to see the cut difference between the two blades.

  • @scorpion19142001
    @scorpion19142001 3 года назад +3

    Have you ever seen a Hover Lawn Mower? I think they came around some Where in the 60's. The lawnmower basically hovered over the grass, like floated over the grass & cut the grass @ the same time. Super maneuverable when it's running.

  • @_madcrafter_8141
    @_madcrafter_8141 6 лет назад +15

    Do a scythe. I don't think they manipulate the air around them to pull the grass up, and you also only have to swing it a fraction of the speed that a lawnmower blade goes. Is it just the sharpness?

    • @Cristian-vl8pg
      @Cristian-vl8pg 6 лет назад

      _ Madcrafter _ yes

    • @LowerLawns
      @LowerLawns 6 лет назад

      Yes, scythes work by sharpness and technique. The user carries a pouch with water and a refining stone to keep it sharp as they go along. They sharpen every few minutes.

    • @jkbrown5496
      @jkbrown5496 6 лет назад

      The peening method of sharpening would be a good physics/engineering explanation.

  • @ChaseWeeks
    @ChaseWeeks 6 лет назад +44

    Reel mowers cut like a pair of scissors, you could go to a golf course and get high speed video of them mowing a green.

    • @LTVoyager
      @LTVoyager 6 лет назад +1

      I think he's too young to know about reel mowers. 🙂

    • @dangerrangerlstc
      @dangerrangerlstc 6 лет назад +1

      Reel mowers are still very much a thing.
      My uncle has a couple antique ones too

    • @LTVoyager
      @LTVoyager 6 лет назад

      BW Tractors They are practically extinct. Only in a few specialized applications like golf courses and often used by the Amish.

    • @dangerrangerlstc
      @dangerrangerlstc 6 лет назад

      LTVoyager they're also often used on pro ball stadiums with real grass. They're not extinct, just specialized. Because specialized places are the only ones with the training and maintenance department to keep them running effectively

    • @LTVoyager
      @LTVoyager 6 лет назад

      BW Tractors I call that nearly extinct. You can still by buggy whips also...

  • @jmacjames8871
    @jmacjames8871 6 лет назад +187

    Ok, so a lawn mower lifts the grass with a lift tab on the blade in order to cut it. However, a weed eater has no lift tab. I believe that the inertia of the tip of the blade of grass has something to do with a weed eaters cutting ability. Please do a video explaining the physics of a weed eater.

    • @farmhousegamer6710
      @farmhousegamer6710 6 лет назад +3

      Good idea! This is Interesting.

    • @JayJonahJaymeson
      @JayJonahJaymeson 6 лет назад +17

      Are you talking about a Whipper Snipper?

    • @ahmedelsheikh1987
      @ahmedelsheikh1987 6 лет назад +3

      Jmac James well, I didn't really see the need for a 'lift tab' cause even the air flow done by the rotating blade is enough for dropping down the pressure on the altitude where the pressure difference is enough for lifting up the grass upwards and that's probably how the grass eater AND lawn mower work.

    • @jmacjames8871
      @jmacjames8871 6 лет назад +1

      Jayden Corbett I have never heard it called that!😂 I love it 😂 I’m gonna call it that from now on 😂👍 whipper snipper 😂

    • @AlienGuy16
      @AlienGuy16 6 лет назад +4

      I'm not sure its fair to compare a metal blade with intentional aerodynamic designs to the free-hanging wire on a (I can't help it, I have to say it too now lol) whipper snipper. The friction, momentum, and impacts would all be different.

  • @allendean9807
    @allendean9807 3 года назад +14

    I’d love to see a deep dive into scythes.
    High speed, showing how experienced cutters hold their angle, etc…

  • @No-je9mj
    @No-je9mj 6 лет назад +273

    5:35 Your Welcome :)

  • @valeniusthekat
    @valeniusthekat 6 лет назад +10

    This may seem like a simple one, but you should do a vid on the power of leafblowers. It's always amazed me that a tiny little motor could move so much air. Love your vids and keep up the great work 😍👏👍🖖

  • @TheGrassFactor
    @TheGrassFactor 6 лет назад +125

    Reel mowers utilize shearing. This is how turfgrasses are able to be maintained at unnaturally low heights of cut. Overall, reels provide a superior cut because of the lack of injury that occurs to the plant.

    • @grimzly
      @grimzly 6 лет назад +13

      Now we need high speed of a reel mower

    • @HolyThunder460
      @HolyThunder460 6 лет назад +5

      As a greens keeper I agree

    • @AMalas
      @AMalas 6 лет назад +6

      The Grass Factor I thought you were saying real as if these are fake lol

    • @nickmagee-brown739
      @nickmagee-brown739 6 лет назад +2

      The Grass Factor a reel mower being a cylinder mower in the U. K. Is that correct?

    • @TheGrassFactor
      @TheGrassFactor 6 лет назад

      Nick Magee - Brown yes sir

  • @annabeeee2093
    @annabeeee2093 4 года назад +61

    "If you're like me, you've spent a ton of your lives on a lawn mower..." On a lawn mower? Boi i gotta push my lawn mower i aint that privileged 😂😂😂

    • @lemonaid8678
      @lemonaid8678 4 года назад +4

      Mcr and Green Day are life. Dont question it. I got a half acre that I cut with a weed eater due to roots and it’s on a slope.

    • @MoarteaLunii
      @MoarteaLunii 4 года назад +2

      Stfu emo

    • @benn454
      @benn454 4 года назад +2

      I haven't used a lawn mower in years. Lived in an apartment before I moved to where I am now and I pay somebody to cut my grass now.

    • @cbasalt12754
      @cbasalt12754 4 года назад

      He could be referring to a lawn tractor, or riding mower.

    • @lemonaid8678
      @lemonaid8678 4 года назад

      Christian Basulto that’s the same thing isn’t it?

  • @hilham89
    @hilham89 6 лет назад +15

    I'm 29 and I knew that the tab which is also called a lift and the more lift on a blade the more suction you have hence why they have low, medium and high lift blades. The high lift blades can also cause more stress on a mowers motor bit in my own opinion cuts better now look at a mulching glad that has a high lift but also has slots cut out in the lift and what this does is that makes some of the grass and or leaves to fall back down to the ground and not exit the chute of the mower. Great video by the way.

    • @bumbaclotboi4476
      @bumbaclotboi4476 6 лет назад

      Im 12 and I knew the exact same thing before I watched this video, smh.

  • @itsthesola10
    @itsthesola10 6 лет назад +124

    Slow mow

  • @denniswingerstad9424
    @denniswingerstad9424 6 лет назад +32

    Using smoke would probably visualize it better

    • @Chamdar17
      @Chamdar17 3 года назад

      the mower acts like a leaf-blower on everything outside the deck - the air-pressure is all outward, not in/upward. It doesn't draw smoke in, it blows it away. Once you park it over the smoke, it's in a low-pressure center by the pivot, but no uncut grass ever reaches there since the grass is cut by the outermost edge of the blades.

  • @petermartini446
    @petermartini446 4 года назад +6

    Hey Destin look into reel mowers, they work just like scissors , the best way to cut grass

  • @GaviLazan
    @GaviLazan 6 лет назад +117

    That Mythbusters reference lol

    • @JoelGibsonBagelator
      @JoelGibsonBagelator 6 лет назад +7

      Do not click this link, it's just self-promoting spam to a trash song.
      However, I did not notice a mythbusters reference... Anyone care to enlighten me?

    • @GaviLazan
      @GaviLazan 6 лет назад +9

      Indeed that is spam.
      at 0:25-0:28 the part with the name of the channel on a metal plate is just like the way Mythbusters would do a transition. And if I am not mistaken the music itself is the same (or I have been watching SED for so long that his music has been embedded in my brain and I no longer can tell the difference).

    • @JoelGibsonBagelator
      @JoelGibsonBagelator 6 лет назад

      Ahh! Good catch, you're totally right, very mythbusters-esque.

    • @DeathbyPixels
      @DeathbyPixels 6 лет назад

      Gavers23 No, that’s definitely Mythbusters music. Makes me happy to hear it again :’)

  • @CullenCraft
    @CullenCraft 6 лет назад +35

    I've always wondered if theres and ideal leaf blower pattern to not get caught in a corner.
    Edit: at first i thought this was kind of a silly thing to wonder... But there are serious fluid dynamics at play here! (and i hate getting leaf dust blasted in my face haha)

    • @smartereveryday
      @smartereveryday  6 лет назад +4

      Please shoot me an email and explain this. I'm intrigued.

    • @skylarker9
      @skylarker9 6 лет назад +1

      I know what you’re talking about. Getting into the corner of say two stone walls or the foundation and you have to carefully choose the attack angle to avoid that blow back. It’s like trying to land a helicopter in a close steep walled area, the turbulence deflects and comes back down from above making the landing really wonky.

    • @killstrees
      @killstrees 6 лет назад

      Aim the end of the tube at the wall just above the material you want to blow away (maybe a foot) and it won't blow straight up into your face as much. Also can use a similar technique to keep debris from going back into the corner by placing the tube above it but aimed away from you (still pointed at the ground) and the debris will come back to you. You can then kinda flick your wrist to twist the machine and blow stuff the other way. This is just my experience with a hand held blower, backpacks will be similar and of course way more power. Takes some practice but if you pay attention to where everything is blowing (pay more attention to stuff that doesnt blow directly away from you) and you will start to figure out how things behave around the front of that tube and how to use it to your advantage. Air speed doesnt make much of a difference in how materials move but rather how efficiently you can get your work done. This is just my experience after many years in the lawn care industry.

    • @Cheesus-Sliced
      @Cheesus-Sliced 6 лет назад

      same physics as reflectors on vehicle lights and road reflectors. When you project a light or high pressure fluid into a corner, it is deflected to the other side and exits at the opposite angle from which it entered. Just like looking at two mirrors that are angled towards each other. You can't actually see yourself in either mirror, but you are seeing the reflection of yourself from the other mirror.
      /→\
      ↑ ↓

  • @maxximumb
    @maxximumb 6 лет назад +113

    So why does the plastic string in my grass strimmer keep snapping?

    • @rebecamugwort862
      @rebecamugwort862 6 лет назад

      Maxx B exactly what I want to know!!! I’ve always wondered that!!!

    • @MotherDuckett
      @MotherDuckett 6 лет назад

      I'm with you on this one maxx

    • @JrangeyV8
      @JrangeyV8 6 лет назад +7

      Yes! Explain the strimmer . Especially how the semi auto string dispenser works. Cheers!

    • @michaeljezierski3154
      @michaeljezierski3154 6 лет назад +14

      It would be.interesting to see the high-speed footage on a braided and non braided trimmer line. Specifically striking chain link, rocks, and plants such as Greenbriar.

    • @logany37
      @logany37 6 лет назад +10

      it gets chopped up by the hard objects it hits

  • @kadedorsey5038
    @kadedorsey5038 4 года назад +5

    Ok two things if you ever think about revisiting this. You should set like a control where you get blades without the tab and see what kind of difference there is and also I wanna know how the old push mowers work the ones with the spiral blade

  • @SlyPearTree
    @SlyPearTree 6 лет назад +186

    How about push lawnmowers that are entirely human powered, i.e. no engine.

    • @yosefmacgruber1920
      @yosefmacgruber1920 6 лет назад +44

      Those have scissors and get jammed up on the tiniest twig.

    • @the3nder1
      @the3nder1 6 лет назад +10

      If you keep the blades sharp that isn't as much of an issue. Also for certain jobs they are way better at getting even length.

    • @MmeHyraelle
      @MmeHyraelle 6 лет назад +10

      you talk about the roller type weird looking blade? I am curious too!

    • @Trident_Euclid
      @Trident_Euclid 6 лет назад

      I do that only using a sickle

    • @ArcticCustomProps
      @ArcticCustomProps 6 лет назад +17

      They are basically a rolling pair of scissors. There is a moving blade, and a stationary blade, and they create that shear point that he talked about at the beginning.

  • @ericconley8699
    @ericconley8699 6 лет назад +353

    How does a weed wacker work

    • @smartereveryday
      @smartereveryday  6 лет назад +78

      On it. Several people will probably try to scoop me on this one, but I have an interesting idea for it.
      If you know any tool companies wanting to partner let me know.

    • @jamesflood7985
      @jamesflood7985 6 лет назад +3

      Literally was just about to comment this! Great suggestion 😊

    • @ericconley8699
      @ericconley8699 6 лет назад +1

      Thank you and I like your videos

    • @Warm_Ice0
      @Warm_Ice0 6 лет назад +19

      It's simple. It wacks the weed

    • @fiveseven15
      @fiveseven15 6 лет назад +4

      Yes. Weed whacker doesn’t have lift tabs, it’s just a whip what manner of sorcery is this? Also what’s better the weed whackers that use line, or the ones that have those plastic blades

  • @frenchvanilla343
    @frenchvanilla343 6 лет назад +22

    This is the most science-y dad thing a dad can do.

    • @fiveseven15
      @fiveseven15 6 лет назад

      TheMysteryMan physics of deck building

  • @produKtNZ
    @produKtNZ Год назад

    0:23 " i'm just E X C I T E D - LETS DOIT! " - that was infectious and made me smile for quite a while 🙃

  • @hockeynut4ever11
    @hockeynut4ever11 6 лет назад +13

    can we go over the older spiral mowers? or maybe if you can, a golf course greens mower.

    • @hockeynut4ever11
      @hockeynut4ever11 6 лет назад

      please upvote this so he can see

    • @StephenAnthony
      @StephenAnthony 6 лет назад +1

      This would be the equivalent of the scissors model he talked about early on. Although, anything more than a small yard makes a reel mover impractical.

    • @jjwhitedog
      @jjwhitedog 6 лет назад

      reel mowers?

  • @CodeRedCody
    @CodeRedCody 6 лет назад +908

    All the dislikes are from grass

    • @nawtmyrealnamelol
      @nawtmyrealnamelol 6 лет назад +21

      can confirm. I am a blade of grass and I hated this video

    • @Boodieman72
      @Boodieman72 6 лет назад +2

      Or they thought it was the other type of grass :D

    • @PsychoticBovine
      @PsychoticBovine 6 лет назад +2

      got your grass kicked, didn't you?

    • @theRealRindberg
      @theRealRindberg 6 лет назад

      No from people that realizes that he's wrong

    • @awsomedude12345678
      @awsomedude12345678 6 лет назад +2

      Dislikes are from people who realize how stupid this rich kid is

  • @Belboz99
    @Belboz99 6 лет назад +12

    Try a manual push mower with rotary blades, they are scissor action. Newer ones are actually a lot easier to use as well.

    • @lucdestrube
      @lucdestrube 6 лет назад

      Golf courses primarily use "reel mowers", basically ride-on push mowers. Pretty cool

    • @WaskiSquirrel
      @WaskiSquirrel 6 лет назад

      I use one of the new ones. It's very easy to push, and good exercise. Biggest drawback is if the lawn puts up seed heads. They get too tall and I need to attack them with a machete.

  • @theshadowknows6969
    @theshadowknows6969 3 года назад

    Out of all the people on RUclips I would want to meet you the most. You seem like a really cool guy to talk to!

  • @trippybruh1592
    @trippybruh1592 5 лет назад +78

    Mid 20th century: invent lawn mower
    2019: How do they work exactly?

  • @r1nstang100
    @r1nstang100 5 лет назад +61

    Why not put some acrylic over the cut in the mower you made and put a light and camera mounted to the mower pointing into the acrylic window

    • @davidmiller6010
      @davidmiller6010 5 лет назад +1

      Like Mike said!

    • @MonkeyJedi99
      @MonkeyJedi99 5 лет назад +5

      It would have been a lot safer than standing in front of the discharge slot of your riding mower... in shorts.

    • @cynicalrabbit915
      @cynicalrabbit915 4 года назад +3

      How about a transparent mower deck made entirely from polycarbonate.

    • @yankeerepairs
      @yankeerepairs 4 года назад

      On a Mythbusters budget . . maybe . . . ?

    • @timchavis731
      @timchavis731 4 года назад

      Too much unnecessary work

  • @stanfoofoo610
    @stanfoofoo610 6 лет назад +5

    This is not a question, but I just wanted to say that I usually listen to your No Dumb Qs episodes while lawnmowing.

  • @teeb9969
    @teeb9969 3 года назад

    Definitely earned my subscription..I love the "How things work" ...never knew that and I've been cutting for years

  • @PeregrineChurch
    @PeregrineChurch 6 лет назад +11

    For the series: Can you do something talking about how the linkages in heavy-duty branch clippers create so much leverage?

  • @andrewnguyen3613
    @andrewnguyen3613 6 лет назад +39

    How does a weed wacker work because it’s just a plastic wire spinning really fast without any lift tabs.

    • @rebecamugwort862
      @rebecamugwort862 6 лет назад +3

      Og Dumpling and how does it break? It’s deigned to hit grass, and somehow it always fails hitting grass. 🤔

    • @occultninja4
      @occultninja4 6 лет назад +5

      If you're talking about push mowers and edgers that use string, I believe they work simply but applying a lot of pressure to a small area, resulting in shredding.
      It's not hard to simulate, if you hold a flat sheet of paper up perfectly flat and get a clean hit on it with lawnmower string, it will slice the paper.
      individual grass stems and leaves are much weaker and or thinner than paper, so they get shredded.
      it's more akin to the grass being pulverised you could say, as you can look at the deck of a weed eater and see the remains of shredded grass splattered against it.
      Also a more dark way to look at it, of you were unfortunate enough to get your leg clipped by one, it would most definitely draw blood and slice clean through the skin even though it's not 'sharp.' It doesn't have to be sharp to cut.
      To grasp this you just have to grasp the physics of cutting. Cutting is applying enough force to break the bonds that hold a material together. Sharp objects do this by focusing the force over a small area, which increases the pressure, however you can also achieve it by increasing the amount of force you use over the same area.
      Can you cut a block of wood with a dull kitchen knife? There's 2 ways you can do it. Sharpen the knife until it's rediculously sharp, or swing the knife with a rediculously amount of force. The later is how an ax basically works. If you feel an ax blade, it's not exactly going to cut you. But if you swing it, there is so much force behind the swing it plows through whatever it hits regardless of how sharp it dull it is.
      That is sort of what is happening with the weed eater string. it's being swing around so fast it doesn't matter that it isn't sharp. It has enough force concentrated in a small enough area (force / area = pressure) that it can 'cut' the grass it touches.
      As for why the string breaks. Well, the string is still plastic and being subjected to huge amounts of abuse. Like everything else made of plastic it will give out, especially if you try to cut something with it it wasn't meant to cut or cannot cut that well, such as really thick patches of grass, or if it gets clipped by a stump or a fence or a piece of metal.

    • @philb5593
      @philb5593 6 лет назад +3

      Basically the same wacking motion without the lift.
      The grass can't bend out of the way so it gets torn

    • @BlackEpyon
      @BlackEpyon 6 лет назад +1

      I've also gotten clipped from the weed whacker before. Didn't break skin, but left a REALLY sore welt. This was also a commercial-grade 28.9cc beast, so I was fortunate that I didn't have it at full throttle at the time (it was spinning down).

    • @segatore1295
      @segatore1295 6 лет назад

      BlackEpyon I got a weed wacker on my ankle it drew blood

  • @Coyote0874
    @Coyote0874 6 лет назад +52

    Hi Destin, I think a video about bowling physics would be great. I’m not telling you to do it, it’s just a suggestion

    • @karlkastor
      @karlkastor 6 лет назад +4

      Vox did a pretty interesting video about the importance of the patterns in the oil on bowling lanes.

    • @VAXHeadroom
      @VAXHeadroom 6 лет назад +1

      2nd and needs to do a series on the different TYPES of bowling games! Duckpins, Candles...

    • @tls5870
      @tls5870 6 лет назад +1

      Destin, Ruben is suggesting you do it and I am telling you to do it.

    • @Coyote0874
      @Coyote0874 6 лет назад +1

      T L S ok then so am i

  • @graphic_destiny_7885
    @graphic_destiny_7885 4 года назад +2

    Finally a video about how the blade looks when actually cutting the grass I was trying to find a video like this for.....well years😂

  • @MyMateNate
    @MyMateNate 6 лет назад +7

    I learned so many new things from this video!! Looved it man. Keep it up.

  • @EmanuelFrias
    @EmanuelFrias 6 лет назад +278

    Upside down helicopter.

    • @nick4819
      @nick4819 6 лет назад +28

      Actually...helicopters are upside down lawn mowers. Lawn mowers were here first.

    • @sarveshk09
      @sarveshk09 6 лет назад +4

      nick4819 😂😂😂

    • @rsjabba
      @rsjabba 6 лет назад +3

      and then there is the flymo, a miniaturised helicopter that we use for mowing lawns

    • @mattyboy141
      @mattyboy141 6 лет назад +2

      haha for as long as man has wanted to fly, he's always had to cut his grass.

    • @Xixu.co.6
      @Xixu.co.6 6 лет назад +1

      rsjabba And it SUCKS. Actually it blows i guess. It pushes the grass down and you get a horrible result. But it's cool, so you have that.

  • @maxwellssilverhammer
    @maxwellssilverhammer 6 лет назад +68

    I am smarter. Yet my lawn is not cut.

  • @markcaruso815
    @markcaruso815 3 года назад

    lol I thought I was crazy trying to research the science behind how lawnmowers cut grass. Nice to know someone else out there is doing the same. This all started out because I was trying to figure out what the best grindangle would be for cutting the lawn. It would be nice to have a video on The different angles and how it affects cutting the grass. Thanks keep up the good work