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How do the "Stabilizers" work?

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20% Discount on Brilliant.org 👉https://brilliant.org/mentourpilot/ Have you ever wondered what the "Back wings" on the Boeing 737 actually does or how the Pilots control it? In this episode I will give you an insight into the Vertical and Horizontal Stabiliser. I will be discussing how the different parts work, what their purpose is and what could happen if the pilots are not using them correctly. Make sure that you leave a like and subscribe and don't forget to highlight the notification bell! If you want to ask question directly to ME or talk to other Aviation enthusiasts or buy great instructional videos then download my FREE mobile app; Mentour Aviation! 👇🏻 📲IOS: https://appstore.com/mentouraviation 📲Android: https://play.google.com/store/apps/details?id=com.teamta.mentouraviation If You want to take part in my Patreon Crew and pre-view my videos as well as support the channel, then use the link below👇🏻 https://www.patreon.com/mentourpilot To buy an #AbsolutelyFantastic Mentour t-shirt, use the following link👇🏻 https://teespring.com/absolutelyfantastic-mentour-t#pid=753&cid=103302&sid=front A special THANK YOU to todays featured channels! To see the full videos, use the links below! 👇🏻 Smithsonian Channel (American Airlines flight 548) https://youtu.be/nPHtof6tHKE SoftwarePole (Aircraft manoeuvring axis) https://youtu.be/pQ24NtnaLl8 BristolCardiffAirport (Aircraft early rotation) https://youtu.be/Kle80KB_s3I TopFelya (B737 Max takeoff) https://youtu.be/RyeqeqSNSgQ
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Text Comments (538)
Eduardo Ugalde (4 hours ago)
Where is the doggy?
Levent Ulusoy (Student) (25 days ago)
your helping me with y project Thx
deborshi kashyap (29 days ago)
What is vertical deviation in aviation
mb (1 month ago)
I can only confirm whats said before. You can explain that stuff wonderful, easy to follow, even if not in motherlanguage. You are an absolut fantatic explainer! Shame there are not more 3D animations possible to explain it with more detail, your channel would deserve it. Nice pig by the way :-)
ENXGMA (1 month ago)
3:37 excuse me wtf? How's that plane lifting at 90 degrees like that? Wouldn't it stall?
ertnesto g (2 months ago)
So have you ever seen u.f.o's while flying?
Mike Smith (2 months ago)
:16 - oh ya...the worst kinds of accidents....tail falling off plane is like the only thing worse than a fire on board
Ankit Kumar (2 months ago)
Sir what is tail support? And why the pilots suspend by using tail support
Angie Kalas-Caldwell (2 months ago)
May I ask what you're accent is? Are you Norwegian?
Billybob Joe (2 months ago)
What are the new round bumps that are appearing along the top of the fuselage on certain aircraft.
andykod77 (2 months ago)
Is it possible for the pilot to break the rudder due to overuse? I find it hard to believe this is a thing
andykod77 (2 months ago)
@SamoKažem plausible ,ive got soo many questions but no answers, i defo do not buy the official narrative
SamoKažem (2 months ago)
@andykod77 who do you think was flying those planes? Bothers me as well, but like I said, I'm no expert. Piloted remotely, perhaps?
andykod77 (2 months ago)
@SamoKažem was really just curious to see what another independent pilot thought ,id like their thoughts on the 9/11 hijackers the way in which those amateurs fllew those planes at such speed , but they won't comment
andykod77 (2 months ago)
@SamoKažem np your welcome
SamoKažem (2 months ago)
@andykod77 I guess that's what dads do. I'm honestly far from being an expert to know, or even assume, but thanks for the info.
Rogelio Maza (3 months ago)
So in other words you have to be gentle not too much in steering.
Rogelio Maza (3 months ago)
So in 2 engines. If one engine turn off..I'll be creating too much burden to the rudder to counter act opposing energy.
AVIATION SUBSCRIBER CHALLENGE (3 months ago)
On the 737 the jackscrew are electric.
SanctuaryReintegrate (3 months ago)
Simple answer: Cut the fins off a dart and try to score a bullseye.
جرير الصغير (3 months ago)
Correction moment or torque ( force * distance ). and not momentum (mass *velocity) should be said in this lecture.
A Zz (4 months ago)
6:20 do I understand it properly that if you dont pay attention your leg can get hitten by that handle?
Ciaran Shaman (4 months ago)
Finally. Now I know why when I used to throw paper planes too fast they would always immediately nosedive into the floor. Great videos/info Mentour, excellent stuff indeed.
Manbok (5 months ago)
You didnt mention skids and slips. I used to do gliding. Just a fabric thread showing us if we do a clean turn or not.
Freddie H (5 months ago)
What's our vector, Victor?
jnbfrancisco (5 months ago)
Great video. When I have told people that the elevator produces a down force and not a lifting force , I get the you're crazy look.
YO K YO (5 months ago)
Awesome informations.
Ambith Suzane (6 months ago)
Good video... But it will be good if it was in front of an aircraft so that we best understand it... Thank you
Jeff Strange (6 months ago)
Ahaha.....stabilizers keep you from suffering with barrel rolls during flight; forward rolls too ! ;-} Right, the same reverence to rudders on boats has to be carefully determined too. Boats depend on ratio of turns, this means you have to spin the wheel say, hard to starboard to get it to turn, not by just turning it to 45degrees. In flight, this has to be extremely careful just because of the speed.
Eric Taylor (7 months ago)
Wait, this video is about the Axis powers?
Eric Taylor (7 months ago)
No control surface if used to it maximum extent should never *EVERY* cause air frame damage if the plane is below it's maneuvering speed. That is, of course why we have this limit in the first place. Airbus somehow got the NTSB to blame pilot error for this accident when it was, in fact, a design flaw. When a design flaw is found in the 737 they ground the model and fix the problem. When a design flaw is found in an Airbus, they pay off the right government officials, blame the pilot, and continue flying with this flaw in place. Do not trust Airbus people. Who knows what other flaws they might have that are just waiting for the pilot to do something that, while unusual, is still perfectly reasonable. And it breaks the plane. I don't fly on an Airbus if I can help it. They are not a trustworthy company.
Steve Creighton (7 months ago)
The MOMENT not MOMENTUM of a force about a point is equal to the product of the force times it's perpendicular distance to that point. It is a torque.
Dylan Jenkins (7 months ago)
Negative lift happens because of this the air flow is inverted higher pressure on top lower pressure on bottom
Dylan Jenkins (7 months ago)
So the airfoil is backwards in the horizontal stabilizer from the main wings in the center?
bzacon (7 months ago)
The term you're looking for describing a force applied rotationally at a distance is moment, not momentum:) love your videos!
Planes and Games (7 months ago)
7:07 the rotation was in normal time probably. The pilots FORGOT THE FLAPS HOW IS IT POSSIBLE WITH A TAKEOFF CONFIGURATION ALARM?
Terrificten (7 months ago)
It is not momentum but a moment...
real sam (7 months ago)
A huge thanks for this informative video but thats moment not momentum.
John Rogan (7 months ago)
Ripped off the fin...welcome to the Dominican republic mon!
John Rogan (7 months ago)
Ailerons plus rudder...right chief...now to set the fine MCAS Boeing anti stall system...and whoa!!!!
John Rogan (7 months ago)
Wheel to manually set the stabilizer...yikes...wish I never heard of that fact!
Lars Holmlund (7 months ago)
Are you born in Sweden
Cristian Klein (7 months ago)
Could you make a video about the yaw damper? What exactly is it? What does it do? How does it work? What does it NOT do (i.e. when do we need manual rudder input)? When should a pilot switch it off? What happens if it malfunctions? Have there been incidents or accidents related to the yaw damper?
Jeroen Jansen (7 months ago)
How do you know how to set the trim before takeoff as you don't know the weight distribution
Jeroen Jansen (7 months ago)
So the stabilisers on the max 8 tend to push down generally to counter act the forward moment produced by the engines moved forward. Boeing should have redesigned the aircraft by placing the wings slightly forward.
jennifer86010 (7 months ago)
Stop !!!! Mentour, where is one of your cute furry co-pilots for this video??? If your dogs are not in the video, you force me to listen to your ramblings, and I fall asleep. As a suggestion, you would do well in your videos if you would simply show the dog on the couch, and you can narrate your subject out of camera frame, perhaps in another room....with the door closed. This way we can watch your adorable dogs and you can attract far more viewers !!!
Adorian Kis (7 months ago)
@mentour In a hypothetical situation when the elevator is not working and stuck in a fixed position, could you land an airplane only using trim actions?
Mozoto (7 months ago)
Why airliners don't use stabilators instead ? Wouldn't that eliminate a situation in the airliner where the stab can overcome the elevator ?
alex2143 (7 months ago)
Stupid question maybe, and I’m fairly certain that airplane manufacturers have thought about this, but if the center of gravity were slightly behind the wings and the tail were designed to provide upward lift, wouldn’t that help with overall lift and allow the main wings to be a bit smaller, saving weight? Is there a good reason they provide downward lift?
Wayne John Hinrichsen (7 months ago)
It's actually Centre of Mass, not Centre of Gravity. Gravity is still not proven and may as well not exist. Remember - "Centre of Mass". Great video though, thanks.
deepbigeyes (8 months ago)
Is it accurate to say the trim and stab effect pitch attitude? You say this but it's confusing because it's also thought of as "trimming out the forces". I understand elevators are the primary way to control pitch from the pilot, but since they are part of the stab airfoil, can changes to trim correctly be though of as changes to pitch attitude? For example, if the plane did not automatically trim throughout the flight, the attitude would not be constant. So the stab is in effect making attitude adjustments correct? All things being equal, if you add maximum nose down trim, it going to cause a negative pitch attitude right?
santa mulligan (8 months ago)
Saw somewhere the 747 rudder is split ,and is not controlled by george
J kK (8 months ago)
No rudder imputs necessary..this is done for the pilots. When "too much" is automatically done for pilots, they begin to lose their flying skills. Too much automation takes away from what the pilots used to have to do to fly the plane. Now the are essentially passengers...just like you from takeoff to landing.
Great Life (8 months ago)
wow great explanation..
Destiny Fan (8 months ago)
I wonder if grid fins form a rocket would work as canards
Destiny Fan (8 months ago)
That's inherently unstable. I'm not an expert on this but I would add a tail at the front to keep the thing level.
Eric O'Brien (8 months ago)
The Wright Flyer had a horizontal stabilizer / elevator at the front of the craft. See also "canard"
Kirk Brocas (8 months ago)
If you banked an aircraft to near 90 degrees and pulled back on the stick, would that turn the aircraft? What surfaces would actually turn the air craft - the lateral vector of the lift from the main wings or the elevators?
lxdimension (8 months ago)
Fascinating video... But would it actually still be possible to rip the tail fin off again if you were too rough with the rudder even with the safety mechanism you mentioned? Isn't the point of the safety feature to eliminate this possibility? Or will it only make it less likely?
Buddy Clem (8 months ago)
17:01 Accidental product placement for Adidas in the middle of a Brilliant advertisement.
Aircraft Planet 1998 (8 months ago)
GREAT VIDEO
Ville Juntunen (9 months ago)
So much fun to learn. Good lesson, nice to be smarter every day.
tygrysisusel (9 months ago)
Why don't you do one on "coffin corner"?
Nikolai (9 months ago)
Fish got vertical and horizontal stabilizers
R Aprill (9 months ago)
always love the videos, very informative!
chris pennell (9 months ago)
So rather then using a trim tab you use the horizontal stabilizer to trim the aircraft. Your videos are brilliant helping me through my ppl.
Mentour Pilot (9 months ago)
Correct! That’s very common in larger aircraft that have to move through a big speed-span
Apoorv Dengri (9 months ago)
Beautiful
gamertaboo (9 months ago)
Do any of the commercial jets have autopilots that can actually land the plane if there was ever an emergency and neither pilot was able?
Simon Smith (9 months ago)
Hi there. I am what you would refer to as an AVgeek. I studied Aviation (Air Transport Management - non flying) at University here in Australia and spent a long time working as an aviation consultant. Whilst not a pilot, I have studied my GFPT, PPL and ATPL, along with internal combustion & gas turbine engines, aircraft maintenance, human factors & CRM, aviation legal framework, aircraft electrics and avionics, aircraft aerodynamics & performance, aircraft design and operations ,integrated safety management systems , airline operations , airport operations ,aircraft structures, air traffic management, aviation mathematics and physics, just to name a few! This video on "Stabiisers" was brilliant and taught me a few things I never knew. Here is my Question for you : According to the 738 QRH and the training you are given, what is the procedure(s) in the ultra rare occurrence of a dual engine failure after V1 (but before Vr) ? Could you please explain the scenarios for the following? (In both wet and dry conditions at an aerodrome @ MSL) * Dual simultaneous engine failure after V1 on a short RWY * Dual simultaneous engine failure after V1 on a long RWY ( RWY 20L/C/R @ WSSS - SIN) for example * Dual non-simultaneous engine failure after V1 on both long and short RWYs - (for example engine number one fails 4 seconds before engine number 2) Thank You! Mentour is brilliant!
GwynBleidD (9 months ago)
Wow! Polish accent in pitch/roll/yaw animation! ;)
Amer Saad (10 months ago)
WHY PILOTS ARE ALLOWED TO EXCEED THE DESIGN LIMIT OF TURNING THE STABILIZER AND ALSO OTHER PARTS? I ALWAYS WONDER. PLEASE CAN YOU MAKE A VIDEO ABOUT THAT?, THAT WOULD BE REALLY INFORMATIVE.
CR Solarice (10 months ago)
I have a question about something that has been "stuck" in my mind and you seem like the perfect person to ask. I read an article about an airliner that survived an initial "hardover" encounter which left the pilot struggling to initiate a survivable landing with a severely deflected, inoperable rudder. With a lot of luck and almost 30k hours of flight experience he pulled it off. While I realize that aircraft are essentially some of the best designed vehicles that there are my question is why don't they design aircraft with simple redundancies like a manual crank that is available to "undeflect" the rudder when it is otherwise inoperable. I know this must sound ridiculous to an experienced pilot but a simple mechanism could be added to these "basic" systems and in an emergency situation could make a huge difference. So that's my question, do you have the thought that a manual rudder system for use during a severe rudder failure is unreasonable? Why aren't fail safe, manual redundancies like that incorporated into these amazing vehicles?
Ellis Jackson (10 months ago)
Horizontal stabilizer produces downforce like the rear wing on a race car? Excellent video
Anton Boludo (10 months ago)
Thank you kind Sir.
Wit Wisniewski (10 months ago)
How strong does a pilot need to be to successfully fly a 737 via mechanical cables solely by muscle force ?
Dan B Cooper (10 months ago)
The horizontal stabilizer should be designed as fail proof. The front of the horizontal stabilizer should be fixed. The rear of the horizontal stabilizer should be movable. That would create a horizontal stabilizer that is foolproof. If it fails it would end in a neutral position that would be possible to oppose by the pilots. With the standard "front moving" stabilizer it all goes to hell when it fails, like Alaska Airlines MD80, and a number of other fatal crashes. Why would engineers still keep a design that is dangerous? I do not know. But it worries me a lot when I fly...
Matthew Califana (10 months ago)
On the takeoff the plane looks to be going nearly straight up !!!
George Robartes (10 months ago)
Flt 587 the manual actually recommended "vigorous use of the rudder " under those circumstances . The first thought again says 'pilot error' but no, once again this was system error as the flight manual failed to define the the term "vigorous" . The pilot simply input left and right rudder vigorously ! As a result limitations were immediately imposed and some redesign resulted .
Murat Yaşar Baskın (10 months ago)
little correction: I think you mean "moment" not "momentum". Keep it up, love your work!
Erin de Kock (1 month ago)
I think he's saying "moment arm"
Ahmed Shams El Din (10 months ago)
Amazing Video, real physics applications and basics of flight principles.
Turiargov (10 months ago)
13:06 Erm... I never had a full cup of coffee during departure. ;-)
Jan Butterfeld (10 months ago)
Great Info on this Channel, also for Aviatic laymen :-) What stuns me, the Fin (vertical stabilizer) can be ripped off of a plane by airstream alone (as shown at 15:10). But then, about Wings it is known they are designed to never brake. Now I'm wondering if bad wheather or turbulence conditions can make Fins breaking away, accidentally. As I learn, bad maneuvering conditions (which could occur in severe turbulences?) would easily rip them off. In other words, why are Wings built so strong (to never brake), while vital Fins aren't that strong, so they can brake eventually.
José Ortiz (10 months ago)
Sir... You are an amazing teacher... I really love your videos... Greetings from Puerto Rico...
TedBronson1918 (10 months ago)
To explain banking a little more, maybe use roads such as the Autobahn or the USA Interstate system, or any road designed for high speed. On such roads, turns to the left and right will always see the road itself banked up so vehicles are using centrifugal force to remain ON the road, instead of sliding off it. You see the same thing on turns at race tracks. Planes do the same thing, except they have to bank themselves, and do it properly. The principle is the same.
علي البهادلي (10 months ago)
VERY GOOD
Petter ! (10 months ago)
Great video!
Jose A. Abell M. (10 months ago)
*moment
Garry AU (10 months ago)
Your presentations are superb. Thanks for posting.
02R96 (10 months ago)
Just curious, have you ever been involved in a critical failure and how did you handle it? Love your series!
Gonzalo Alvarez (10 months ago)
Math and physics are all related... :) When everybody is young always dislike (more than a real hate actually) the maths and physics. I test Brilliant and find very useful to keep my calculations and brain active on maths.
CMDRFandragon (11 months ago)
Soo, with all that, can you explain how the rear fins work on a plane like the WW2 German ME262 HG/II. It just has 2 horizontal stabilizers put at a more upward angle, kinda like a F15 vertical fins but slanted.....some hybrid configuration?
Erik Hendrych (11 months ago)
That is BS the rudder is there so that you can make knife flights with the 737 ;-)
Ziane Belhout (11 months ago)
Thanks for your videos i really appreciate your videos but i have a direct question . As a pilot do you really believe ,as they say, that flying is the safest mean of traveling ? Thanks again .it would be great pleasure if you make a video 💗
Yang Guan Tang (11 months ago)
I think you are referring to moment instead of momentum
Yang Guan Tang (11 months ago)
no dogs no likes!! Just kidding
aussiebloke609 (11 months ago)
Coordinating a turn seems much like riding a motorcycle. You lean into a corner, but your centre of gravity still feels as if it goes straight through you, through the machine, and through the wheels to the ground. You _see_ the lean, but you only _feel_ a little heavier.
Andrew Burns (11 months ago)
I think you meant to say "moment", not "momentum". Effectively the "moment arm" in dynamics.
Andrew Burns (11 months ago)
"Momentum" is simply mass * velocity, as I'm sure you're aware.
Stoyan Daskalov (11 months ago)
Ok but ... why the pilots could not be able to fly the plane without the vertical stabilizer in this incident. Yes it is key aerodynamic element, but if only helps to stabilize the plane in flight and to help with the yaw, without it will be a nightmare, but probably manageable by aggressive handling. Can you help me understand that. If it will be to long you can do a video on it :) Thank you in advanced
Matt Thompson (11 months ago)
Really interesting one of your best videos!!
tom black (11 months ago)
Please stop saying...ok ...right ...right ...ok ........all the time
Team Kolumbix (11 months ago)
God bless you, such a great video. So, A320 doesn't have a movable horizontal stabiliser? Why? How is its trimming happening then?
Dylan Farrar (10 months ago)
@Team Kolumbix can you give me a link to a website about this
Team Kolumbix (10 months ago)
@Dylan Farrar the whole surface of horizontal stabiliser, for example, B737 can be moved or trimmed. The stabiliser of A320 is fixed and all the trims are done by elevators.
Dylan Farrar (10 months ago)
@Team Kolumbix No airplanes have moveable horizontal stabilisers. I don't know what your talking About
Team Kolumbix (10 months ago)
@Dylan Farrar I was talking about movable / adjustable horizontal stabiliser, not a vertical / rudder
Andy Moores (11 months ago)
Absolutely Fantastic!
David Herrera (11 months ago)
Amazing explanations as always!!! Love your Chanel!
MachWaveRider (11 months ago)
Nice video. You may want to equip yourself with a small scale model airplane as a visual aid to this kind of flight physics videos. I liked the axes rotations mimics, though! :)
Richecks (11 months ago)
I feel bad for pigglet...
Mr Pineapple jr (11 months ago)
I was wondering what they where used for. Thanks for the information