Installed these on a riding mower ruclips.net/user/postUgkxetgfkJxfdT_B2vGYP-uNTLaBbim9OKTD . They were sharp out of the box, although I've never liked blade edges that were coated...not quite as sharp as I personally want. Using my belt sander, I removed the coating from the cutting edges and refined the edge enough to shave with them. So far, after three runs, these blades are holding up as expected. Even after hitting a few fallen 1/2 inch or so branches, the edges are still sharp as heck. No edge dings, no warping, etc. As far as installing them, the cutouts were of the proper size and shape to fit my aging Craftsman mower. Very satisfied.
ganymedeIV4 what’s wrong with trying to save as many people as is possible? Wouldn’t you try to save people from death if you were able? I glanced at your channel and you appear to have an obsession with death. I want to warn you about the death that comes after the body has died. The death of the soul and spirit when the blood of Jesus is not found will end all fascinations about death and darkness. The one who finds himself thrown into darkness will curse every foolish thought that led him there.
Awesome work; the slow motion shots turned out really well! If you plan on upgrading the system, I would recommend extending the blade so the tip speed is faster with the same rpm.
I'm thinking it might be an additional valuable contribution to science to film some other material behaviors. Fluids, non-newtonian fluids, more foam things, dust/sawdust/smoke... who knows what else. This stable perspective might be a unique thing in material sciences. (It might also expand the domain of data available for deep learning.) (Posting here because my comment might otherwise never be seen by anyone.)
Loved the way the blade just so.. elegantly went up and down.. up and down.. Great build, nice accidental demonstration of static vs dynamic balancing.
Every time I see it, I'm still amazed. Blows me away that every high speed camera video I watch, turns such unacknowledged chaos into remarkable and stunning beauty. Great work sir!
I worked for a helicopter service back in the day and this made me think of all the times I watched the guys track and balance rotor blades while they're on the aircraft. It's definitely an art.
Wow. This seems so technical. You are indeed a master at your craft. As my students would say, "You're a REAL man!" That was so awesome. A complete pleasure to watch.
Very interesting idea, carried out to perfection as usual. I doubted that you will be able to eliminate the vibrations, but there is the mower spinning at 1800 RPM! Awesome shots. Keep the amazing work!
I was hoping we'd get some footage of the frame lock, wasn't disappointed :D Could be an interesting video effect if it can be held at that RPM and stuff drops in.
1.1k people just stopped by to watch things destroyed and got bored watching the process of getting it balanced. :-/ Great video for the behind the scenes of engineering it!
I see what looks like cute otter stickers on the one camera mounted to a tripod. Followed by what appears to be a bad dragon tentacle being chopped in the mower blade. I feel like we've probably met at some point lol.
This reminds me of years ago when Mark Rober did ceiling fan bullet time with a Gopro, then he and Destin (Smarter Everyday) took it further and used a spinning arm of mirrors for a high speed camera to look down. This is really cool that you got it balance man.
Awesome a new tesla500 video. Have you ever thought of building one of those high speed mirror setups for shots where the camera can't move that fast realistically but a smaller optical mirror could?
I liked Smarter Every Day's slow motion lawnmower blade video. No handicaps, crutches or shortcuts over there. He also explained it better. This was a half-speed merry-go-round video.
6:40 Ha! DId anyone else squint and look away thinking that the UV was going to burn their eyes? :-) I was so into it that I absentmindedly thought it was real :-) I really like your engineering and machining. A pleasure to watch.
I retired just as the very high speed digitals were coming on market. We had one that did 1MFPS, and my old team still sends me some funny ones. Most of my work was about sound, and the effect it has on stuff, (High end Engineering term, lol.) We put a Twinkie at 9G's one time. Still one of the funniest. Thanks for all your work on this. It was great to watch. Smiles.
Excellent, both as a technical achievement and as a video. The passage with the colourful bouncy balls getting sliced by the oncoming blade looks rather Star Wars. Also give my love to Trixie, the helpful cat.
I've just watched your video and I'm extremely impressed by your ingenuity. You obviously spent a great deal of time and money making it. Thank you. I sincerely enjoyed watching it and I'm subscribing to your channel immediately.
You've got a lot of fun toys in your shop. I think watching the build and your engineering strategies was more interesting than seeing the final result. But of course building something is always more fun than using it (as long as there is no stressful rush). I was hoping to see some kind of strange light bending behavior in the spinning camera footage, but I guess it would have to turn much faster. Well done!
That was 100% worth it - thank you very much for the link to skip the build but honestly it's way more satisfying seeing the results knowing how hard it was to set up - balance is a bitch!
There are lots of videos with blades going through objects, but this is the first I've seen where you see things from the blade's POV. I found it absolutely fascinating!
tesla500 I'm only poking fun 😁. I've seen "smart" guys complain about losing the chuck key but not doing anything about it. You've got the "knack" you see a problem, you fix it!
Static vs dynamic balancing is a tricky beast to play with. Though, you managed to make it spin wonderfully well and balanced. Though, how much better then the original blade is it? Also, maybe it is time to put in an RF trigger input for the camera? Could be of help when the trigger literally flies off... 19:03
Same here. I watched the whole video to see if he adressed this as I thought it was "POV filming rotating things 101" (pretty sure I've seen this on multiple popular video on youtube). Plus, you wouldn't risk debris damaging the camera. Could go way faster with the mirror and would have lost way less time rigging up the jig. Even though the process of creating it must have been very interesting in itself.
@@Cthulhu013 That's how it's usurally done. I don't see why a flat glass plate (even though you can do a mirror without glass) sticked to a steel one wouldn't be able to sustain less g force than a complicated assembly of plastic and electronics. IMO, it can sustain tremendous amount of g-force. It's just a very reflective surface sticked to whatever material you want, it's simple and solid as it can be.
@@xmtxx The main issue I see is that relative to the camera frame, the view will be rotating very fast. Depending on shutter speed you could end up with some weird looking blur which gets worse near the frame edges. The blade wouldn't look as sharp and blur-free as it does here.
You have a great future doing this technology. Keep pushing hard with all science available :) best of luck, looking forward for your next upgrade and experiments.
Smashing success! Love how worn the will it mow sticker gets during usage!! I'm also curious how you get out of bed in the morning that set of balls?!? Seeing how close you put the expensive hardware to point of destruction!!! I'm amazed the camera survives the deacceleration from max rpm to relatively slow when eating a cd-rom unit!! That has to be some funky g-numbers!
@@tesla500 it looked epic! I saw right away in the first cut of slowmo, how much it decelerated - there must be carnage! And sure there was - trigger thingy decided to continue with its momentum! epic project! Thanks!!!
Did the little robot man unplug the camera at the end? Best vid I have seen in a while. I really appreciate all the hard work that went into it but you didn't bore us with it. I could watch that thing chopping stuff up for hours, I was wanting more. Subbed.
Needs a sharper blade. Thought of getting some tool steel blade stock, grinding it and drilling it to the correct fit, then case hardening just the blade itself. Did that to remake a cutting blade, and after it was hardened and quenched on the cutting edge it was able to hold a razor sharp edge. You do not do the whole blade, just heat the cutting end to bright red heat with a torch then quench in oil, anneal to a dull red then dump in insulating hot sand till cool, then grind clean and whet the end sharp again. Can get it razor sharp that way, and providing the rest of the blade is still not hard it will be less likely to shatter. You will need a better blast shield though, but you will get nice cuts. But who else would have though, just how much can a camera take G wise, you could sell those to NASA to be put in the engine compartments of rockets, though you would need a decent downlink to get the data off them at full frame rate, or a blast proof housing for use on a SpaceX launch.
Star Gazer Hard things are brittle things. If you don’t anneal something after hardening it, the first time it hits something remotely hard it’ll shatter. As with many things, there’s a trade off between wanting an edge that’ll stay sharp (hard) and an edge that won’t chip itself to bits (annealed).
@@mrb692 Sure, but doesn't heating it to red hot and then slowly allowing it to cool completely anneal it? Doesn't that remove all the hardening? Sorry, I know the principle of hardening but I don't know the process of how it is actually implemented. Just seems odd.
Star Gazer, an experienced metalworker can use the color of the workpiece as a rough estimate of its temperature. From “coldest” to hottest, it goes cherry, red, orange, yellow, white. “Red hot” really isn’t that hot in the grand scheme of metalworking. Check out blacksmithing videos, and the thing they’re hammering on starts out white hot and by the time it makes it to yellow hot it’s back in the furnace. When hardening a piece of steel, it is rapidly quenched from a very high temperature (yellow or hotter), locking the carbon atoms in places they normally wouldn’t be. This makes the workpiece as hard as it can get. When tempering, the piece is raised to a lower temperature and allowed to cool slowly. This lets some of those carbon atoms relax out of their hardened positions, thus softening the steel. Crucially, because the annealing temperature was less than the hardening temperature, only a portion of the atoms relax back out and the piece retains some of the hardness gained through quenching. Starting the tempering process from a higher temperature or running for a longer time will result in a softer final piece, and lower temperatures and shorter times make for a harder piece. When a tool overheats and loses its temper, that’s because it was taken above the temperature it was initially tempered at. This lets more carbon atoms diffuse out, and the tool becomes softer. The practical bottom line is that a tool can withstand temperatures up to what it was tempered at, and since hard tools have low tempering points it’s critical to keep them cool.
Could you put a 45degree mirror in the centre then shoot from above and somehow rotate each frame according to its position to make a whole film (without stressing your lovely camera) fun vid cheers :)
@@jaggztech it'd have to be sensitive to the actual RPM of the blades, probably having to rig up some sort of arduino detecting the changes in light from a strip of reflective white tape on the blades. Just an idea.
@@SailingFrolic Might be able to get by with just some image processing to determine the mirror location and orientation (probably just looking for the edges). Could throw a neural net at it but training that could be more irritating and complicated than necessary. Then it's just the image transform to align/rotate. Still, it could then get kind of messy with the inaccuracies of the mirror locations, but smoothing those values might suffice. In any case, we'll see if anyone ever does a mirror mounted version -- it's a good solution. Nevertheless, I think his video was also maybe demonstrating the resilience of the camera hardware? [Edit: Ya know what, you're right -- some white paint wouldn't hurt any of these processes. :) Also, I just realized the blade image itself, if in the mirror, could also be used for alignment. We could then go so far as to stabilize the images from a point on the blade... One step at a time though right? First step: RUclips comments. Next step: 2019. Happy New Year!]
@@joshhefner7589 Hey Josh. I'm not sure if I should just ignore mistaken RUclips comments -- I didn't mention Arduino, was referring to processing during post, and mentioned markings only in a future edit in response to someone else (because it's not a bad idea). Take care. :)
Hey Tesla, you got a comment from Smarter Every Day.. I'm impressed your video ranked amongst those watched by the king of slow-mo and with good reason. That was an incredible feat of balance to pull that one off. Way cool video, Thanks!
i totaly agree, but allow me to play devils advicoate for just a moment. (because i always enjoy looking at things from multiple angles) thats not a real mower blade, it a peice of steel he cut himself into a shape that resembles a blade. its probably not even sharp. ive seen cuts from both dull and sharp blades, and yes the dull ones do rip and tear the grass rather badly. but a fresh sharp blade? Mwa! *dose the itialian hand kiss in the air thing* a beauty and sight to behold. And lets not forget hes hitting hard solid objects, not grass. the behaviour is naturaly going to be different.
Great work. I was mowing high grass with a 3.5 horsepower gasoline lawnmower and hit a 1/2 inch steel pipe sleeve. The blade cut one side of the sleeve completely in half. It went through about an inch and a half of nearly 1/8 inch thick steel. The end of that blade is moving! My dad hit a roofing nail and it stuck in my leg. Better than the eye.
that was amazing. its all that chaos that I think that some CGI artists miss and feels flat vs real practical effects. I know that wasn't your goal, but just some tangent thing I took away from it. in addition to the effort of getting the camera safely on the mower and the set up of all the other camera angles. great job.
What about mounting a mirror to the middle of the blade? Then the camera could be still shooting down recording the images reflected by the mirror. The only thing that would have to happen is that in post you would have a spinning image that could be up righted by software in post.
vidyaWolf yes exactly and they can point the camera lens to the mirror from the top. It’s pretty cool way to film high speed objects without moving cameras.
Centrifugal force is the outward force generated by a spinning mass. This is the force you feel that pushes you outward on a merry go round. Centripetal force is the force that resists centrifugal force and tries pulling everything toward center. This is the force you exert while trying to hold on to the merry go round pulling yourself toward center so you don't fall off. Just so you guys don't get it twisted.
I had a woodshop teacher tell me another WS teacher he knew would drop a hot dog in the spinning jointer blade. Seems like a terrible mess for just an object lesson for students, but I always wondered what that would look like. Can we see a hot dog please?
It produced much better footage than I had expected. I really wanted to see more slice-able objects go through it though....fruit, meat etc but of course, I understand the mess it would make.
As a former mechanic I can see what you are doing is a static balance.....what you need to do as well is a dynamic balance...adjustment WHILE in rotation, You might have been able to persuade a garage that has the older type of dynamic balancers to give it a spin for you. Cheers from Canada North and I love the idea!
I have watched the first 14 minutes and you are so wrong I can't watch any more. Your static and dynamic notions are correct. the problem is your removing the back blade, and balancing the length statically, instead of calculating for centrifugal force with the 420 gram weight being much to low.
Please let us know when you post the video of your mathematically correct model so we can enjoy it. Don't forget to include complete video description of how you dynamically balanced the blade by including the proper centrifugal force in your calculations. Don't forget to show all your work in the calculations, as we give partial marks for effort.
You were doing a static balance on it, when I think it needed to be dynamically balanced. Weights which balance statically, can exert more force when the rig is spinning due to centrifugal force
You are a mad man!! Reminds me of those old Timex commercials where they strapped watches on boat propellers, etc. I'm impressed!
What... you couldn't use the trademarked phrase?
I remember the B&W film of it and it disapeared in the actual show and he spoke of numerous takes and it working.
No flying insects were harmed in the filming of this video
you guys are crazy for standing so close to an unbalanced spinning piece of metal.
@@EternalResonance ok and?
Installed these on a riding mower ruclips.net/user/postUgkxetgfkJxfdT_B2vGYP-uNTLaBbim9OKTD . They were sharp out of the box, although I've never liked blade edges that were coated...not quite as sharp as I personally want. Using my belt sander, I removed the coating from the cutting edges and refined the edge enough to shave with them. So far, after three runs, these blades are holding up as expected. Even after hitting a few fallen 1/2 inch or so branches, the edges are still sharp as heck. No edge dings, no warping, etc. As far as installing them, the cutouts were of the proper size and shape to fit my aging Craftsman mower. Very satisfied.
Great work! Needs more double bass pedal.
@ganymedeIV4 Merry Christmas :)
Just binge watched your channel destin 😳
@ganymedeIV4 wtf are you on about lol
And more cowbell!
ganymedeIV4 what’s wrong with trying to save as many people as is possible? Wouldn’t you try to save people from death if you were able? I glanced at your channel and you appear to have an obsession with death. I want to warn you about the death that comes after the body has died. The death of the soul and spirit when the blood of Jesus is not found will end all fascinations about death and darkness. The one who finds himself thrown into darkness will curse every foolish thought that led him there.
Awesome work; the slow motion shots turned out really well! If you plan on upgrading the system, I would recommend extending the blade so the tip speed is faster with the same rpm.
Good idea, but if you want to keep the same rpm with the same engine there will be a limit to the amount in which you can extend the blade.
Why?
I'm thinking it might be an additional valuable contribution to science to film some other material behaviors. Fluids, non-newtonian fluids, more foam things, dust/sawdust/smoke... who knows what else. This stable perspective might be a unique thing in material sciences. (It might also expand the domain of data available for deep learning.) (Posting here because my comment might otherwise never be seen by anyone.)
We love you hacksmith.....keep going ur doing great..... love From India
That would be much better🤔
Loved the way the blade just so.. elegantly went up and down.. up and down..
Great build, nice accidental demonstration of static vs dynamic balancing.
Oh yeah you have a high speed camera too
I love how many people are focused on the Bad Dragon tentacle.
HAH! A Bad Dragon tentacle! OMFG!!! XD
Ah. I see you're a man of culture as well!
First thought: Really?
*showes videos to friends*
Yes it is!!!
Hahahaha. Definitely the most expensive thing he threw in there
OMG NO. THAT'S WHAT I THOUGHT IT WAS 😂
Ohmy
Every time I see it, I'm still amazed. Blows me away that every high speed camera video I watch, turns such unacknowledged chaos into remarkable and stunning beauty. Great work sir!
can we address the dragon in the room?
Wow, that method of determining how heavy a counter weight you need using just a kitchen scale was super smart! Definitely learned something today!
I worked for a helicopter service back in the day and this made me think of all the times I watched the guys track and balance rotor blades while they're on the aircraft. It's definitely an art.
For those of us who can't click the description.
16:11
I thought about doing something similar but was worried about damaging the camera.
Maybe with a mirror instead the camera and the camera above with a glass screen in front. Should be more safe.
I can imagine the camera getting loose and chopped up by the lawnmower haha
Me too and then i realised it was pointless
@@Raybo3D
That seems like an awesome approach.
Cody'sLab oh Cody! I think the bouncing balls could be a windows 98 screen saver for some reason.
Wow. This seems so technical. You are indeed a master at your craft. As my students would say, "You're a REAL man!"
That was so awesome. A complete pleasure to watch.
Very interesting idea, carried out to perfection as usual. I doubted that you will be able to eliminate the vibrations, but there is the mower spinning at 1800 RPM!
Awesome shots. Keep the amazing work!
I was hoping we'd get some footage of the frame lock, wasn't disappointed :D Could be an interesting video effect if it can be held at that RPM and stuff drops in.
1.1k people just stopped by to watch things destroyed and got bored watching the process of getting it balanced. :-/
Great video for the behind the scenes of engineering it!
I see what looks like cute otter stickers on the one camera mounted to a tripod. Followed by what appears to be a bad dragon tentacle being chopped in the mower blade. I feel like we've probably met at some point lol.
He's a furry and brony that lives in Canada, so you may have seen him before.
Gabriel Augusto Nascimento Soares he a furry? *casually subs*
Thanks for the skip timing, I was so impressed with your thoughtfulness I watched the whole vid out of respect :)
This reminds me of years ago when Mark Rober did ceiling fan bullet time with a Gopro, then he and Destin (Smarter Everyday) took it further and used a spinning arm of mirrors for a high speed camera to look down. This is really cool that you got it balance man.
20:11 so satisfying how that multicolored bouncy ball went right through the chute perfectly! XD
Awesome a new tesla500 video. Have you ever thought of building one of those high speed mirror setups for shots where the camera can't move that fast realistically but a smaller optical mirror could?
Do you mean such things they use to track projectiles mid flight?
@@zvpunry1971 Yes of course.
Yeah cool idea. I was thinking that could be possible :D
That's a good idea and would work nicely to view the mower at full speed
@@tesla500 and a properly sharpened Blade.
That is some of the best high speed I have seen, props for being a bro and offering the skip build time. I totally dig the build though.
$8,435 of camera equipment
$5,234 of shop equipment
154 hours of research and labor
3.4 seconds of real time footage in slow motion
Priceless!
Eric Price he needs to spin a mirror, not the camera
I liked Smarter Every Day's slow motion lawnmower blade video. No handicaps, crutches or shortcuts over there. He also explained it better. This was a half-speed merry-go-round video.
I thought I knew the music. Then I checked the credits and wasn't disappointed. "Checks for free" 😂
It's a pretty familiar riff that some of us can't help but to recognize from 1987!
I was looking for this comment! Can't believe nobody else noticed the Money for Nothing riff.
I've always thought it's _Sex_ _for_ _free_ . 😂Now I'm ashamed although it makes the Bad Dragon even more hilarious.
6:40 Ha! DId anyone else squint and look away thinking that the UV was going to burn their eyes? :-) I was so into it that I absentmindedly thought it was real :-) I really like your engineering and machining. A pleasure to watch.
Sponsored by Bad Dragon
YES! I thought something looked 'familiar'
18:05
I retired just as the very high speed digitals were coming on market. We had one that did 1MFPS, and my old team still sends me some funny ones. Most of my work was about sound, and the effect it has on stuff, (High end Engineering term, lol.)
We put a Twinkie at 9G's one time. Still one of the funniest.
Thanks for all your work on this. It was great to watch.
Smiles.
Didn't know what Bad Dragon is until this comment section
ｉ ｗａｎｔ ｏｎｅ ｓｏ ｂａｄ
I wish I hadn't tried to learn.
and now i know too.... lol
I too was like wtf is that. a google search later...OH MY! ROFL RUFKM hahaha
A warning of NSFW is required!
Excellent, both as a technical achievement and as a video. The passage with the colourful bouncy balls getting sliced by the oncoming blade looks rather Star Wars. Also give my love to Trixie, the helpful cat.
I've just watched your video and I'm extremely impressed by your ingenuity. You obviously spent a great deal of time and money making it. Thank you. I sincerely enjoyed watching it and I'm subscribing to your channel immediately.
You've got a lot of fun toys in your shop. I think watching the build and your engineering strategies was more interesting than seeing the final result. But of course building something is always more fun than using it (as long as there is no stressful rush). I was hoping to see some kind of strange light bending behavior in the spinning camera footage, but I guess it would have to turn much faster. Well done!
Cool to think I got here before reddit, imgur, facebook and instagram all steal this.
That was 100% worth it - thank you very much for the link to skip the build but honestly it's way more satisfying seeing the results knowing how hard it was to set up - balance is a bitch!
i hope no cats where harmed in the video
THIS IS WHAT RUclips IS ALL ABOUT!!! where else are you going to see something as cool and crazy as this! 🤘🏻🤘🏻
I see someone likes their Bad Dragons x3
I found it pretty amazing that the lens on the mower camera remained quite free of debris contact, even when cutting fluid filled containers!
9:41
"You play the guitar on the MTV..."
I'm hearing Malcolm Young but too tired to think about it. xD
Damnit Carl!! Now I can't sleep thinking about it, but luckily for me I realized it's "Shake Me - Cinderella"..............I'm goin' to bed!! xD
@@MAGGOT_VOMIT sigh...back when rock music rocked. Now its just a high hat and poetry 😆
One of the best explanations of static vs. dynamic balance I've seen. Great job. Great video!
No plexi shields? How do you not have a pile of broken cameras and lights?
Engineering and understanding of physics at its finest! Love it man keep it going!
Nice bad dragon xD
Qué haces aquí Fred?
impressive. admire the amount of time and effort you have put together to entertain and to accomplish your experiment.
RIP that bad dragon
I was wondering about that
Timestamp?
18:08 / 18:20
That one would have fit in my collection
@@Jolinders108 Kowalski, analysis
There are lots of videos with blades going through objects, but this is the first I've seen where you see things from the blade's POV. I found it absolutely fascinating!
You can tell David is a smart man. He ties a string to his drill chuck key. 😁
The mill and drill press use the same chuck key, and I was tired of them always moving around and dissappearing
tesla500 I'm only poking fun 😁. I've seen "smart" guys complain about losing the chuck key but not doing anything about it. You've got the "knack" you see a problem, you fix it!
capnthepeafarmer my drill came like that
it blows my mind how much work you put into this
i clicked just to find out why... you're the hydraulic press channel for spinning blades
Vaaat da faak?!
I testament to just how well built the camera is.
Static vs dynamic balancing is a tricky beast to play with.
Though, you managed to make it spin wonderfully well and balanced. Though, how much better then the original blade is it?
Also, maybe it is time to put in an RF trigger input for the camera? Could be of help when the trigger literally flies off... 19:03
Centre of mass and centre of rotation don't always match. Awesome job explaining that. Cool project too.
Why dont you mount a 45 degree mirror and film the mirror then rotate the footage using script?
Had the same idea. You'd lose a little bit of the frame but it'd allow faster speeds
Same here.
I watched the whole video to see if he adressed this as I thought it was "POV filming rotating things 101" (pretty sure I've seen this on multiple popular video on youtube). Plus, you wouldn't risk debris damaging the camera.
Could go way faster with the mirror and would have lost way less time rigging up the jig.
Even though the process of creating it must have been very interesting in itself.
Would a mirror survive the g force?
@@Cthulhu013 That's how it's usurally done.
I don't see why a flat glass plate (even though you can do a mirror without glass) sticked to a steel one wouldn't be able to sustain less g force than a complicated assembly of plastic and electronics.
IMO, it can sustain tremendous amount of g-force. It's just a very reflective surface sticked to whatever material you want, it's simple and solid as it can be.
@@xmtxx
The main issue I see is that relative to the camera frame, the view will be rotating very fast. Depending on shutter speed you could end up with some weird looking blur which gets worse near the frame edges. The blade wouldn't look as sharp and blur-free as it does here.
You have a great future doing this technology. Keep pushing hard with all science available :) best of luck, looking forward for your next upgrade and experiments.
Smashing success! Love how worn the will it mow sticker gets during usage!!
I'm also curious how you get out of bed in the morning that set of balls?!? Seeing how close you put the expensive hardware to point of destruction!!!
I'm amazed the camera survives the deacceleration from max rpm to relatively slow when eating a cd-rom unit!! That has to be some funky g-numbers!
Thanks! I think I calculated about 200G of shock for that deceleration
@@tesla500 it looked epic! I saw right away in the first cut of slowmo, how much it decelerated - there must be carnage! And sure there was - trigger thingy decided to continue with its momentum!
epic project! Thanks!!!
Did the little robot man unplug the camera at the end? Best vid I have seen in a while. I really appreciate all the hard work that went into it but you didn't bore us with it. I could watch that thing chopping stuff up for hours, I was wanting more. Subbed.
you could run it at full speed if you mount the camera above the blades with a rotating mirror like a periscope.
Came here to say this.
There’s no need to spin a camera like this to get footage.
One of the most unusual videos I've seen on RUclips. My hat is off to you.
Needs a sharper blade. Thought of getting some tool steel blade stock, grinding it and drilling it to the correct fit, then case hardening just the blade itself. Did that to remake a cutting blade, and after it was hardened and quenched on the cutting edge it was able to hold a razor sharp edge. You do not do the whole blade, just heat the cutting end to bright red heat with a torch then quench in oil, anneal to a dull red then dump in insulating hot sand till cool, then grind clean and whet the end sharp again. Can get it razor sharp that way, and providing the rest of the blade is still not hard it will be less likely to shatter. You will need a better blast shield though, but you will get nice cuts.
But who else would have though, just how much can a camera take G wise, you could sell those to NASA to be put in the engine compartments of rockets, though you would need a decent downlink to get the data off them at full frame rate, or a blast proof housing for use on a SpaceX launch.
SeanBZA why would you anneal it after hardening it?
Star Gazer
Hard things are brittle things. If you don’t anneal something after hardening it, the first time it hits something remotely hard it’ll shatter.
As with many things, there’s a trade off between wanting an edge that’ll stay sharp (hard) and an edge that won’t chip itself to bits (annealed).
@@mrb692 I think he was referring to tempering it.
@@mrb692 Sure, but doesn't heating it to red hot and then slowly allowing it to cool completely anneal it? Doesn't that remove all the hardening? Sorry, I know the principle of hardening but I don't know the process of how it is actually implemented. Just seems odd.
Star Gazer, an experienced metalworker can use the color of the workpiece as a rough estimate of its temperature. From “coldest” to hottest, it goes cherry, red, orange, yellow, white. “Red hot” really isn’t that hot in the grand scheme of metalworking. Check out blacksmithing videos, and the thing they’re hammering on starts out white hot and by the time it makes it to yellow hot it’s back in the furnace.
When hardening a piece of steel, it is rapidly quenched from a very high temperature (yellow or hotter), locking the carbon atoms in places they normally wouldn’t be. This makes the workpiece as hard as it can get. When tempering, the piece is raised to a lower temperature and allowed to cool slowly. This lets some of those carbon atoms relax out of their hardened positions, thus softening the steel. Crucially, because the annealing temperature was less than the hardening temperature, only a portion of the atoms relax back out and the piece retains some of the hardness gained through quenching. Starting the tempering process from a higher temperature or running for a longer time will result in a softer final piece, and lower temperatures and shorter times make for a harder piece.
When a tool overheats and loses its temper, that’s because it was taken above the temperature it was initially tempered at. This lets more carbon atoms diffuse out, and the tool becomes softer. The practical bottom line is that a tool can withstand temperatures up to what it was tempered at, and since hard tools have low tempering points it’s critical to keep them cool.
Wow so much engineering went into this. Pretty amazing.
Could you put a 45degree mirror in the centre then shoot from above and somehow rotate each frame according to its position to make a whole film (without stressing your lovely camera) fun vid cheers :)
If you do this, I'd be willing to try coding up the frame alignment software.
@@jaggztech it'd have to be sensitive to the actual RPM of the blades, probably having to rig up some sort of arduino detecting the changes in light from a strip of reflective white tape on the blades. Just an idea.
I thought exactly the same, and it would be a lot safer to the camera
@@SailingFrolic Might be able to get by with just some image processing to determine the mirror location and orientation (probably just looking for the edges). Could throw a neural net at it but training that could be more irritating and complicated than necessary. Then it's just the image transform to align/rotate. Still, it could then get kind of messy with the inaccuracies of the mirror locations, but smoothing those values might suffice. In any case, we'll see if anyone ever does a mirror mounted version -- it's a good solution. Nevertheless, I think his video was also maybe demonstrating the resilience of the camera hardware? [Edit: Ya know what, you're right -- some white paint wouldn't hurt any of these processes. :) Also, I just realized the blade image itself, if in the mirror, could also be used for alignment. We could then go so far as to stabilize the images from a point on the blade... One step at a time though right? First step: RUclips comments. Next step: 2019. Happy New Year!]
@@joshhefner7589 Hey Josh. I'm not sure if I should just ignore mistaken RUclips comments -- I didn't mention Arduino, was referring to processing during post, and mentioned markings only in a future edit in response to someone else (because it's not a bad idea). Take care. :)
Tons of ingenuity and craftsmanship only to chop things up. Nice!!!! 🤘🤘🤘
it was beautiful seeing the Bad Dragon but kinda feel bad about it. worth it anyway!
Hey Tesla, you got a comment from Smarter Every Day.. I'm impressed your video ranked amongst those watched by the king of slow-mo and with good reason. That was an incredible feat of balance to pull that one off. Way cool video, Thanks!
Thank You Tesla500,
This proves to me that rotary mowers rip things up and affirms my reasons for using a reel mower.
i totaly agree, but allow me to play devils advicoate for just a moment. (because i always enjoy looking at things from multiple angles) thats not a real mower blade, it a peice of steel he cut himself into a shape that resembles a blade. its probably not even sharp. ive seen cuts from both dull and sharp blades, and yes the dull ones do rip and tear the grass rather badly. but a fresh sharp blade? Mwa! *dose the itialian hand kiss in the air thing* a beauty and sight to behold. And lets not forget hes hitting hard solid objects, not grass. the behaviour is naturaly going to be different.
Great work. I was mowing high grass with a 3.5 horsepower gasoline lawnmower and hit a 1/2 inch steel pipe sleeve. The blade cut one side of the sleeve completely in half. It went through about an inch and a half of nearly 1/8 inch thick steel. The end of that blade is moving! My dad hit a roofing nail and it stuck in my leg. Better than the eye.
This isn't helping my fear of falling into high-speed propellers. If anything, I feel more justified in my fears.
The universe is extremely detailed. No matter how much you slow down time, you still see the laws of physics acting with each other.
Where are all the "You spin me right round, baby right round..." comments?
That camera is getting spun right round after all!
there was a website called meatspin that had the video you are looking for... but its gone
You mean the gay guy getting fucked in the ass by a guy wearing a condom?
Already knew about that.
that was amazing. its all that chaos that I think that some CGI artists miss and feels flat vs real practical effects. I know that wasn't your goal, but just some tangent thing I took away from it. in addition to the effort of getting the camera safely on the mower and the set up of all the other camera angles. great job.
18:10 I thought you dropped the cat into it - OH NO KITTY KITTY
What about mounting a mirror to the middle of the blade? Then the camera could be still shooting down recording the images reflected by the mirror. The only thing that would have to happen is that in post you would have a spinning image that could be up righted by software in post.
You got the right Idea. Your way is the best way to proceed.
Best way? Hell nah. You're wasting like 80% of the image space on stuff that isn't the mirror. Plus, things will get in front of that mirror.
You could mount a mirror instead on the blade. That way, you could keep the camera without damaging it and also you could test it on full speed.
David Nasa im trying to post the same comment so he sees it!
dont spin the camera spin a mirror
vidyaWolf yes exactly and they can point the camera lens to the mirror from the top. It’s pretty cool way to film high speed objects without moving cameras.
Centrifugal force is the outward force generated by a spinning mass. This is the force you feel that pushes you outward on a merry go round. Centripetal force is the force that resists centrifugal force and tries pulling everything toward center. This is the force you exert while trying to hold on to the merry go round pulling yourself toward center so you don't fall off. Just so you guys don't get it twisted.
You could start your video with a short action shot to make people new to your channel interested in what you are doing.
Because the beginning is boring as hell.
Im shocked the slo mo guys havent done this...very cool project!
I had a woodshop teacher tell me another WS teacher he knew would drop a hot dog in the spinning jointer blade. Seems like a terrible mess for just an object lesson for students, but I always wondered what that would look like. Can we see a hot dog please?
Coleman Outdoors great minds think alike. Chicken legs would also be cool.
@@davidjfiedler That would be awesome!
Nice machine shop. Thanks for all the work to make this, I've always wondered what it looks like under there.
Liked for Trixy… I always like videos with cats…
Despite the rumors, no cats jumped into the blade.
That’s pretty cool, I love watching videos like this.
*Crazy russian hacker's hydraulic crush videos are pretty awesome but after seeing this I'm taking a break and want more lawnmower demolition*
Wait, CRH does those too? No respect for Lauri?
Boom.
It produced much better footage than I had expected. I really wanted to see more slice-able objects go through it though....fruit, meat etc but of course, I understand the mess it would make.
16:11 to skip the blah-de-blah and go straight to the action!
Thank you!
I read the comments first so I could save the time! Thanks!
@@dadefope80 welcome
@@davidarnold7665 no worries!
Great video! Really interesting to see as an undergraduate student in engineering and see learned concepts being applied!
Pffffft @18:08
Amazing amount of work, and well worth it. Good job!
Hey dude; have you seen the remote?
Can't find it anywhere.
Worth all the work. This would have been helpful for my Machine and Vibration exam
An actual lawnmower blade would be more rigid and wouldn't flop around like a wet noodle.
@Anon Ymous: Wouldn't be to sure of it at that speed!
@@agerven he said he was spinning it slower than normal lawnmower speed otherwise his camera would break.
@@AnonYmous-qg4ph Ah, didn't know that (always turn sound off).
Thank Gawd a good use has been found for all those quality manual machinkas.
13:12 - Testing rig, no safety. Imagine that big piece flew off towards you....
maybe he wants to die
Just duck
This is better than watching a rerun episode of Mythbusters. I like the one with the balls especially when the green one went out the exhaust shoot
I think the only part of thos video I didn't like was when he destroyed the Bad Dragon tentacle. *I would've killed for that thing!* :
As a former mechanic I can see what you are doing is a static balance.....what you need to do as well is a dynamic balance...adjustment WHILE in rotation, You might have been able to persuade a garage that has the older type of dynamic balancers to give it a spin for you.
Cheers from Canada North and I love the idea!
I have watched the first 14 minutes and you are so wrong I can't watch any more. Your static and dynamic notions are correct. the problem is your removing the back blade, and balancing the length statically, instead of calculating for centrifugal force with the 420 gram weight being much to low.
Please let us know when you post the video of your mathematically correct model so we can enjoy it. Don't forget to include complete video description of how you dynamically balanced the blade by including the proper centrifugal force in your calculations. Don't forget to show all your work in the calculations, as we give partial marks for effort.
Gary Nice
That was a truly Awesome video!
Destruction at the end was the icing on the cake
You were doing a static balance on it, when I think it needed to be dynamically balanced. Weights which balance statically, can exert more force when the rig is spinning due to centrifugal force
That rig is a work of art.
Excellent slo-mo footage, very satisfying to watch. Mad props man, awesome!
That's absolutely the best thing I've seen on RUclips!