Winglets - What are those things on the aircraft wing-tip?
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- Опубликовано: 8 мар 2018
- Sponsor: brilliant.org/mentourpilot/
Have you ever looked out through the aircraft window and seen the cool looking wingtip winglets and thought; I wonder what those things actually do?
In this episode I will give you a entry level explanation to the world of winglets. Why are they there? What do they do? Why do the winglets of different aircraft look so different?
All of this will be covered.
Enjoy!
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A special thank you to my sponsors: Brilliant.org and Bose Aviation.
www.boseaviation.com
Also, thank you to the following channels that I have borrowed some material from:
/ @epicslowmoshow
/ @boeing
I watched these videos when I was a little kid interested in airplanes, now 5 years later I come back here for my study in Aerospace Engineering.
You really shaped who I've become and I'm so grateful that you made these video's. Much love
"To prove this is not a green screen I'm going to run into the distance" I belly laughed, thank you lol
Best part of the whole video… he flies away and everything! 🙃
that was cute haha
Loved that. And it really did look like a green screen.
A layperson like me, who has little knowledge about aviation is practically dragged into your channel. It is interesting and throwing more information has really made me an enthusiast in aviation. I would love to watch your channel more and more and of course, thank you.
I love these vids: makes understanding technical flight things easy to understand and very enjoyable.
Perfect! I am happy you like them!
Winglets also provide more places for airlines to stick their logo.
TonyP0927 and more room to hold on to if delta gave away your seats to standbys right in front of you while you hold the ticket in your hand.
GoodDay Wow.
I actually like that.
Howdy
Very idiotic
Winglets are also much safer. Some of the vortices created by heavy and slow aircraft can be extremely powerful and even push other planes out of the sky (if they happen to be in the path of the vortex). Winglets help greatly reduce the vortex (as Mentour said), by giving a place for the high pressure and low pressure air to meet gradually (instead of a big column of high pressure air twisting over the edge of the wing as it tries to fill the low pressure area).
The recent Qantas incident from last week in LA resulted because the plane was hit by the wake vortex from the taking off aircraft ahead of them. Aside from that, there have been many accidents attributed to wind vortices, both big and small aircraft.
“Nature has a tendency to do things in the most efficient way”
*Expect the next Boeing to have flapping wings.*
*Starts praying
Well airbus started testing something near that
Thank you! Your delivery content and enthusiasm in your presentation is very commendable. You present a very complexed topic (winglets) to a level for novice to advanced learners to understand. You are a very skilled and knowledgeable teacher.
Boeing can't even develop a replacement for the outdated 737 which has been pushed way past its design life, with disastrous and tragic consequences. They should put their efforts into building a safe aircraft before they attempt to do anything ground breaking.
Parasite drag is produced by VERTICAL surfaces and Induced drag is created by HORIZONTAL surfaces, for example when the Flaps are at 0 degrees they produce Max Induced drag and Min Parasite drag, at 90 degrees Min Induced and Max Parasite drag and at 45 degrees in the middle of both, for a flap with no thickness. The fact that Lift and drag are both proportional to airspeed squared, means airspeed affects a 2 Dimensional surface, geometrically a Square plane. Wing Vortices are not the cause of Induced Drag but it is just a Visible Effect of it. I have developed a hypothesis to explain physical, atomic and subatomic (gravitational movements, Center of Gravity and Mass), however I need to validate my V & H surfaces theory first.
It seems that Winglets reduce Lift and increase Drag, I also believe in turbance Winglets impose additional stress to wings and all other moving parts inside the wings like rods, joints and moving surfaces. Wingtips also decrease the stability and controllability in turbulent air. Simply put another british scam.
Please let me know what you think, thanks.
I signed up for Brilliant via your link Sir!
Great resource!
Live the videos!
Too late for me to fly commercial at your level, but perhaps a couple notches down the complexity scale..
Love the math and physics link to help me on my way!
Hi ! Sir
•You are my inspiration ur voice and
way to explain is unbeatable I like ur videos.
•Just a question,
Q How Many flight does pilot have to operate in 1week ?
•Thanks sir
Hi!
Thank you!
That depends on what type of operation you fly. Anything from 2 to 20
I love your instructive videos!!! 🙌🏻🙌🏻. My first thought in the 737 winglets was three to four feet, but quickly realized the distance away. Then settled on about six feet. Eight plus!! What a surprise.
Excellent video. You explain those wiglets' benefits so well. Thank you
Excellent, I really liked this video, for all the technical details you provide.
God Speed.
Damn those winglets are huge!
Yes they are!
How tall are the winglets on a 747 then? 4 meters?
They are 6 feet on the 744. The 747-8 has raked tips. However, the 767-300ER has 11 foot winglets! They're huge. (Heights according to wikipedia, however I work around both aircraft)
tell me about it
They look huge if they are right outside of the window.
They are waaaay bigger than I thought. Cool videos my friend. Just downloaded your app. Keep up the good work! Cheers from Greece and Amsterdam!
I always wanted to know what winglets were for!! Thanks for posting:)
when I was a youth, I remember reading in the 70's an article in Popular Science... about these new winglets that were going to be on EVERY plane...we;;, here we are!
Great video Mentour as usual. Like that runway background!
It's a runway for radio controlled model aircraft not far from where he lives. My local club only has a grassy field, and even one airfield is not paved. They must have lots of enthusiasts!
Great video Mentour, keep up the amazing work! 👌👌👌 I live watching them!
When I was an undergraduate at Rochester Inst of Technology, there was a mini wind tunnel in the lab and we did some experiments on these winglets. That was in late 1980s. It was fun doing these experiments on different types of winglets.
Thank you, thank you very much!
An awesome tutorial!
Wow, shocking on how wrong I was with the size. Almost dbl what I thought. Great video
I had no idea winglets were that tall. BTW, love all of your video's. I love commercial aircraft and you've answered a lot of different questions. Thanks!!!
Happy to hear that you find the beneficial!
Enjoy watching your "lessons" about aviation. Keep up the great work. Very helpful and informative.
Great video , Always fun to learn something new.
Thank you, Mentour Pilot, that was wonderfully explained. I imagined the height of the sharklet to be 50% taller than your height. I think I got it pretty close.
Yep, that’s pretty spot on
Mentors pilot you are my fav youtuber
I was so wrong......Great video! Thanks for taking the time to do these awesome videos.
Cool! I’m glad you liked it. Almost everyone underestimate the size of these things.
Thanks for the explanation.
Wow! I thought they were shorter. Great explanation. I always enjoy and learn from your vids. Thanks a bunch
Great video
Oh my gosh the winglets are ginormous!!! Went on a 737 before and from the window it looks quite small. Also, btw, this was a great video. Keep up the good work!
Excellent episode, many thanks
Thank you! Glad you found it interesting!
very nice and simple explaination .thank you
Love your videos man
Many thanx to u mentour, love your channel
Great to hear! Welcome to the channel!
Great piece of knowledge. Keep it up !
as the way you explain everything is just amazing....thanks sir...
Just l can thank you very much for my knowledge
I love your videos! I'm very interested in aviation and I'd like to know how much pilots rely on the autopilot systems. Thanks!
Great video! Thank you so much)
EXCELLENT! WITH COMPLIMENTS.
Great video matey! Keep it up
Thank you! I’m happy you liked it!
Always this legendary mini runway!😂
Sébastien Dobbelaere legendary hehehe
João Guilherme Braz !!!!!22
Thanks for covering this subject ! Having lived near airports my entire life I've noticed the changes in aircraft design, and wondered why jets were all of a sudden sporting upturned wing tips. You answered my question quite well and in a simple manner. Thank You.
PS- my guess for the winglet height was 1.5 to 2 of your body height. I'm glad to see my estimation was pretty accurate
Very interesting and informative.
Just subscribed. Thank you.
That typical Aviation enthusiast run at the end tho 😂
That is how I sometimes run!!
Captin bob cool
Yeah that was pretty funny
Best ending *ever!*
@@tanmaypalkar9861.?0m
Good video. I always thought the 737 sharklet was much smaller. Could you do a video on the auto break?
7.3 IDI Diesel sharklet is on Airbus and they are taller. here are some stats: at 2.5-metres tall, they will replace the aircraft's current wingtip fence. presented as an option on newly built aircraft, Sharklets have been especially designed for the Airbus A320 family to reduce fuel burn by 3.5 percent. question 2:
there are 4 phases to landing:
final approach, flare, touchdown and de-rotation, roll out and deceleration. on the A320, the auto brakes have three settings. LO, MED and MAX. autobrakes are available on Normal Brakes (Green system) only. LO mode delays for 4 seconds after touchdown. MED mode delays for 2 seconds. MAX has no delay and is only used during takeoff in the event a rejected takeoff is perforned, it applies max pressure with no delay
The auto brake is operated by a switch mounted in the center of the top panel above the flying instruments. Its graduated from 1, 2, 3, 4, and 5, If its a five, you pull the switch out towards you and then lock it into 5. 5 is very rarely used unless its a bloody short field and you need maximum braking. Use of reverse thrust is always used no matter how long the runway is . Thats to save in brake pad wear and tear. Hope that explains the use of the Auto Brake system
As always, very informative and well-presented.
Good job ... Thanks for show the Great knowledge
Hey Mentour,
you have uploaded this video in a perfect time for me. In about one week I need to finish my scientific school work
which is exactly about Winglets of course. Your video has given me some last little things I can bring in my around 15 page
scientific work.
Therefor thanks a lot for your help and I hope you read this
Greetings Florian
Dear Mentor Pilot,
Wow! Here is an interesting fact for your books. I live on Mercer Island which is which is a stone's throw from downtown Seattle Washington. My son Robby Sotelo was and is a very close friend of the grandson who created the winglet.
His grandfather tried in vain to convince anyone who would listen to put winglets on wings, but it all fell on deaf ears. So he patented it, and now every winglet you see in the world, he gets a cut of the profits.
I also live on Mercer Island, and though I'm from the bicycle industry, my son and I are airplane nuts and your RUclips videos are the best.
Sincerely
Dan Sotelo
AKA Mr. onZa
Wow! That’s really cool to hear. Thank you for following the channel and send my best regards to your son’s friends, grandpa!
Really good content! Thanks.
Excellent presentation!
Nice job on inserting the winglet over the video picture you were in and getting the scale right. I guess you just had to know its height and your own and then just guesstimate it fractionally while scaling it in over your own frame, huh?
To explain wingtip vortices (in very simple terms), the air is moving faster over the top of the wing than the bottom due to the top being longer than the bottom and the wing is designed so the air meets up at the back of the wing. On a swept wing the air moves down the wing (or outward) as well as across it and at the end of the wing the faster upper air meets the slower lower air and it spins into a vortex.
It takes a lot of energy to spin the air in the vortices, that energy has to come from somewhere and the only place that can be is from the plane, and that creates drag. Drag slows the plane down requiring the engines to work harder using more fuel.
The winglets change the way the fast upper air meets the slow lower air so that the wing-tip vortices are greatly reduced. There is no one best design for this, the wing for each model of plane is different and the best design for each wing varies.
The efficiency of the winglets changes as the air-speed of the aircraft changes. The design of the winglet determines where the winglet is most efficient and that choice varies depending on the roll the plane is planned for. Short hoppers will be better served by winglets the are most effective during takeoff and climb (and landing), long haul aircraft will best be served by winglets that are most effective at altitude and cruise. This is the exact opposite of a "one sized fits all" situation.
Not mentioned in the video is the 787 wing is designed to flex a lot more than typical aircraft wings, the shape (curve) of the wing itself works to reduce wing-tip vortices without winglets.
Thnx, enjoyed that little book! 👍
I love the scenery, great video!
Very interesting, I've enjoyed all of your videos. Thanks
i love the end when he said is wasn't a green screen because I thought it was also till I seen the shadow from the camera on another episode
10:27 this cracked me up so much!
It wasn't even necessary because we could see his trousers blowing in the wind. But thanks for the laugh anyway!
Very insteresting explanation, answering some questions bothering me for a very long time; when I was a child in the 60s it was natural for my siblings and I to make paper-airplanes, our goal was to make them fly as far as possible, so we started bending the tip of the wings, we discoverd these wing-tips added stability to these paper-planes, letting them to fly in straight line easier and reaching long distances, when I notice the industry introducing wing tip in the 70s I was amused, but until today I did not know the reasons, thanks for your video, I love them.
I know alot about planes and your videos give me more information. Thank You
Mentour: Makes a video about winglets
Intro: *Uses a Boeing 777*
Samuel's Simulations hahahhaha
Be care full while on runway mentour a really useful log ." I have a question about how will you recognize the other planes flying parallel with you ?"
I am careful :)
:)
You generally have two ways:
Via TCAS radar or,
Visually by looking at the plane lights you can more or less know where it's heading by the colors you see.
It is his RC runway next to his house
Excellent and full of chock full of info, subscribed .
Great clear, concise video.
Thank you! I’m really happy you liked it!
Hi mentour pilot, is there any difficulty by winglets while cross wind landing ?
Excellent question. We actually have slightly less crossword Nd capability with the Winglets than without.
Got to be worse with double winglets. I recently talked with an old friend who has retired as a commercial pilot and asked about cross-wind landings. He said he just side slipped. Before he left engineering to be a pilot I took a short ride (instead of a drive) to Lindbergh Field. He did an extreme side slip and we landed in a parking area next to the then Ryan complex.
I see you're doing 737 Q&A... So my question: The vertical stabilizer on the 737 has a taper as it joins with the fuselage - a feature which wasn't present in the first Boeing 737s. Also, none of the other Boeing models has this feature. What is the purpose of this design?
Great question. I will have to look that up.
Mentour Pilot thank you captain! :)
Interesting to know about aircraft. Good presentation.
Thank you for the content😎
can u explain about crosswind, downwind & upwind
upwind is the direction you take off, because airplane always takes off against wind, thats why the name is upwind. crosswind is when you have the runway 45 degrees to your left or right, and downwind is when your are flying opposite the runway you toke off from. you will learn this better when you do pattern training
Crosswind - Flying in a direction where the wind is blowing accross the plane. Downwind - Flying in a direction where the wind is blowing in the same direction of travel. Upwind - Flying in a direction where the wind is blowing in the opposite direction to the planes travel (headwind). Terms mostly used when flying circuits as you always land upwind to get the most lift for a stabalized approach...same applies for take off. If you took off from a runway to do a circuit you would take off Upwind, turn crosswind, turn downwind, turn base then turn final (upwind again) to land.
Great channel. Question. What are those "pods"that are hanging under the main wings. Hope that isn't a stupid question. If you have addressed this question, please tell me the name of the video. Thanks for the interesting content. Safe flying!!!
Great question. I will cover those in a separate video.
Why is 757 vortex a special problem?
They cover the flap actuators.
Very interesting, thank you.
Excellent video!!!!
On Boeing 767 raked wingtips are only on 767-400 also raked wingtips are incorporated on the Boeing 777-300 only.
Cheers from San Francisco.
Yes, true.
Not really, they are also on the 777-200LR and also of the 777F
Hello, Thanks, I stand Corrected...
not 777-300 only 777-300ER
Elle, Thanks for the additional Update...
Cheers from San Francisco, My last job was a Fueler @ SFO.
Haha I figured that you weren’t on a green screen when I saw the wind moving your shirt and tie, but how are you out there? Do you do videos when an airport is closed?
It’s a small RC airport close to my house. 😊
Mentour Pilot Ah I see!
~~it’s a zebra crossing on an otherwise unmarked road
Mentour Pilot wi was going to say your just lucky and not getting hit but I prefere what you said
Ok mentour pilot! I thought you are in a real port
Very informative and enjoyable
Excellent Sir.. very nice
hi mentour pilot. on the boeing 737 each winglet is 8 feet long and 4 feet at the base narrowing about 2 feet at the tips and is reduce drag
Just to be picky, they reduce INDUCED drag which increases by the square of the speed increase.
I think the 737 winglet is equal to your height!!
Great! Check out the full video!
Mentour Pilot wow!! I thought it's gonna be a bit larger but its much bigger!!!
I think it's serves for like for saving gas and it's around your hight
Winglets are 10ft high.
Ditto.
I Have more fun watching your Channel than anything on here . you learn a Lot about Aviation This is More Interesting
So plain & interested - remind me old memories related to Aviation 💜🌹💜
Good job sir; respect
Hi Mentour! I have one question, why the older 737 models have more cockpit windows than the modern ones?
Pablo Lapadjian I can answer your question. Basically before the all technology the third person on the cockpit ( the navigator)707 and 727. Was responsible for navigation, and on the olds times during night we flew looking for out side the windows too, looking for Stars. The time passed but they continus be done with this windows.
They're called eyebrow windows, they also gave pilots greater visibility in turns.
Primarily because the original 737 shared lots of fuselage components with the 707 and 727. The cross section was the same and it meant they could use common components such as seats and other fixtures and fittings. If you look at a Boeing 707, 727 or (early) 737 the forward fuselage is basically the same.
Mentour has a video on that specific topic. The "eyebrow" windows turned out to have more downsides than benefits, and were dropped from later models.
Good info, thanks ! Now I can explain it to my technically challenged friends.
BEAUTIFUL!!!!!
Wow.It's very informative video.
I've been waiting since 1974 to see winglets on commercial craft.
8ft to 10ft
Thanks for the videos. I fly from Sfo to manila once a year.
Dang! All this time, I thought it was a seamless greenscreen. :) Thanks for covering this interesting component.
I think it´s woth to mention, that the raked wingtip is only fitted to the newer 767-400 : )
True
Don't the extended range 777s also have raked wingtips?
I can already tell you not at the green screen because of the wind😅
Great video!
His two dogs handling the fans off frame: "We fooled him, boss!"
Explains aircraft parts very enjoyable and informative . Now I know what the function of winglets are!!!!!
Great video. I was going to suggest this as a topic, but you got to it first.
Mentour some 737's have windows near the overhead panel why are they there and why are they not there on other versions of 737 and other aircrafts
The eye-brow Windows? I will see what I can do.
Mentour Pilot Thanks
As far as I'm aware, the eyebrow windows were for astral navigation which obviously isn't a thing that's needed with all the advanced in technology like GPS and many other things since the '60s. I believe it reduces production cost, maintenance cost, and a bit of weight.
So is all the added technology and computers why flight crews don’t include navigators anymore - or do some planes still have them?
Pretty much. I don't think navigators are really used anymore, except in situations like certain military aircraft, like bombing runs and AWACS and stuff like that. Advances and simplifications in flight controls and the number of things that can run themselves is also why modern aircraft have lost the engineer.
Can ice be seen on wings? How does the ice detection system work, and, what keeps it operational and from freezing?
There are multiple kinds of 'icing' and most of it can be seen. 'Clear Ice' is just that, clear, almost like glass, but it's obvious, especially if you use Deice. Rime ice is like someone chopped up a bunch of ice and then threw it on the leading edge of the wing. It's bumpy and very easy to see.
Wings, and engine inlets and such are not the only place that accumulates ice, the cockpit windows also will accumulate it as well. Ice detection can be a simple light that you can see shining on the wing, or a more sophisticated system that measures light and how it's diffused.
Deicing can take many forms, the most common are Boots, Chemicals and Bleed Air.
Boots were the first type of deicing to see any real success. They use a rubber 'boot' that fits over the leading edge of the wing with pnuematic tubes inside of it. When activated, the tubes expand, pushing the boots outward. It breaks the ice that has formed on the boot, and the ice is shredded, and falls away. Ernest K. Gann, in his book "Fate is the Hunter" recalls a trip in a DC-2, which is instructor told him was the greatest ice carrying airplane of the time, where they left Nashville, and picked up so much ice that it was forming faster than the boots could deal with it, and actually created a layer of ice over and around the boots, rendering them ineffective. Gann says if he had been in any other airplane, they would have died.
Next is chemical treatments. You'll often see airplanes being sprayed as they taxi out for takeoff. They use different chemicals to remove and prevent the build up of ice on the surface of the wings and airframes. However, only recently, have chemicals been used in flight. Alcohol and other fluids have been squirted onto propellers to remove and prevent icing, but now, whole airframes can be protected using the 'TKS' deicing system. Developed in Britain during WWII, it was used for bombers. Today, it's actually certified for small, single engine propeller dirving aircraft. It uses laser drilled aluminum sheets bonded to the leading edges, and the fluid, a glycol based fluid seeps out onto the surfaces via the holes. The holes are 0.0025" wide. TKS systems come with a pump that runs at two speeds, the low speed is before you actually enter icing conditions to prevent icing in the first place (i.e., climbing or descending through an icing layer) or the higher speed to pump more fluid for ice removal.
Bleed air is the next type, and is found on jet aircraft and some larger turboprops. It takes hot air, called 'bleed air' from the jet engine and moves to along tubes and radiators along the section of the leading edge of the wings, rudder and stabilizer to use hot air to heat the surfaces to prevent or remove ice on those surfaces.
Some applications use electric heat as well, which is usually heated elements inside of a rubber boot arrangement. You would typically see this on a propeller driven airplane, on the prop. You'll also see electrically heated windshields instead of using a 'defroster' like in a car, which heats it from the inside. The electrically heated windshield is much faster and more reliable. On some older airplanes, again, smaller, General Aviation airplanes, you'll see a 'Hot Plate' which is a single heated element that lays flat on the regular windshield, and only the Hot Plate is heated. It reduces what you can see, you're limited to a few inches, but it also reduces the cost and complexity of a heated windshield as well.
Hope this helps some.
Michael Galle on the A320, we have the SII, structural icing indicator. with the accumulation of ice on the indicator, it can be assumed that ice is also accumulating on the other exterior surfaces as well..wing a/i may either be used to prevent ice formation, or to remove ice accumulation from the wing leading edges.
Wing a/i should be selected on whenever there is an indication that airframe icing exists. dhis can be revealed by ice accumulation on the SII located between the two cockpit windshields.
Engine a/i must be selected on during all ground and flight operations, when icing conditions exist, or are anticipated, except during climb and cruise when the SAT is below -40C.
Eng a/i on before and during a descent in icing conditions, even if the SAT is below -40C
Thank you
This helped a lot
The 737 winglets are about from the ground to your pockets?
That would be incredibly low
each is 8 foot tall
Small size!
That is higher than me
I am 2 feet
You didn't takeoff after that run, did you?
I think he did. Maybe his arms are shaped like aerofoils? The problem would be how he would propel himself once he was in the air.
Amazing aircraft the 737 reminds me of another "workhorse" the DC 3 .
Love your channel.