That's an amazing demonstration! Loved it. keep them coming👍

@planesimple8514

3 жыл бұрын

Wow! Thank you for such a positive comment. I'm glad you liked it. Thank you again.

Brilliant! finally a video that explains how they work!

@planesimple8514

3 жыл бұрын

Thank you very much! I really appreciate the positive feedback.

@karkanan6208

2 жыл бұрын

@@planesimple8514 so the rotors are the pads and the stators are the disks?

@planesimple8514

2 жыл бұрын

In the example in the video yes, the pads are what rotate with the wheels. I don't see why it couldn't be the opposite in other cases though.

I just learned something that I thought to be interesting. Turns out it was an awesome experience that’s very educational. Reminds me of a shop teacher I had as a kid.... Great video 👍

@planesimple8514

3 жыл бұрын

It makes me very happy to receive positive feedback like yours. Comments like these are the reason why I make the videos to begin with. I'm glad it was well received. Thank you very much.

I salute you Sir for your amazing explanation 💯

@planesimple8514

2 жыл бұрын

Thank you very much Aamer Saber. I appreciate your kind words.

Thanks. Finally I understood how the assembly brake-wheel is done. Best explanation so far.

@planesimple8514

2 жыл бұрын

Thanks Zacky531

Thank you for sharing this. Really makes me understand a lot better when learning this topic.

@sitisarahabdulrahman

3 жыл бұрын

You should get more subs. I would definitly binge watch your other vids this weekend.

@planesimple8514

3 жыл бұрын

Man, thank you so much. That was exactly my goal, to make it easy to understand.

@planesimple8514

3 жыл бұрын

Thank you! I hope you find it interesting. If you have any suggestions let me know.

very Simple thanks for this Video

@planesimple8514

3 жыл бұрын

Thank you. That's my goal for this channel, to provide simple, easy to understand explanations but not dumbed down. To provide full info without fluff. Thanks again for the positive encouragement.

Very cool. I seen a video of a plane landing and wanted to know how and what kind of brake setup it uses. Thanks for the detailed video

@planesimple8514

3 жыл бұрын

Hello Steve, I'm glad you found my video helpful. Thanks for taking the time to leave a nice comment.

Great video, thank you ;)

@planesimple8514

3 жыл бұрын

Thank you for the positive feedback. I appreciate it

Excellent explanation/demonstration. Thanks

Very nicely done! Thumbs up for you Sir!

@planesimple8514

3 жыл бұрын

Thank you very much Yaslina. I appreciate it.

Thank you ! it appeared in a problem and I had trouble understanding what was going on but now evrything makes a lot of sense, tahnk you again !

@planesimple8514

3 жыл бұрын

Hello Nico Neil, you are welcome and I'm glad it helped you. Thanks for the positive feedback.

The best view of the brake stack

@planesimple8514

3 жыл бұрын

Thank you. I appreciate it.

Excellent explanation, 10/10, this helped alot. Thank you for sharing

@planesimple8514

2 жыл бұрын

Thank you very much Karon Stephenson. Thanks for taking the time to give me some positive feedback.

Clear explanation. Thanks

@planesimple8514

3 жыл бұрын

I'm glad it was easy to understand. That means I have succeed in my goal of providing easy to understand explanations. Thank you very much.

Thanks for this very informative video on how aircraft braking work. Even I understand this and it does make sense.

@planesimple8514

2 жыл бұрын

Thank you very much Jay Tee It Up. I appreciate it.

I love this video so much. Thank you. I knew that the brake had multiple layers of rotor discs and stator discs, but I didn't know how it worked. This video has answered my question. Thank you.

@planesimple8514

4 ай бұрын

Thank you! It's very satisfying to receive such positive feedback like yours. Thanks for taking the time to write in.

Brilliant explanation. Thank you!

@planesimple8514

Жыл бұрын

Thank you Salman Saeed.

Great explanation, thanks!

@planesimple8514

Ай бұрын

Thank you!

Superb video and explanation. The weight of just the piston plus the discs and pads, alone, must be huge

@planesimple8514

2 жыл бұрын

It is a heavy assembly, but it has a GREAT capacity to do a lot work. Look at it this way, you need massive engines to speed the plane from stopped to take off speed, but the brake assemble can take that same speed away and bring the plane from flying speed right down to zero and yet the brakes are much smaller and simpler than the engines. So yes, the brakes are heavy, but still very light for what they do.

Hey there! Good Morning! I really enjoyed this video and it was a great explanation! Bravo : ) Ready to see more. Catchy name too- it's perfect!

@planesimple8514

3 жыл бұрын

Good morning to you too Elizabeth B. I'm glad you liked my video. Thank you very much for such a positive comment, I really appreciate it. Welcome to Plane Simple.

Those are some serious brakes, massive amounts of braking surface in there! I assume that it's difficult to cool them effectively though and the whole assembly acts like a heat sink absorbing the heat energy as the braking phase is intense but relatively short in duration, I bet that whole assembly gets up to some huge temperatures

@planesimple8514

Жыл бұрын

Hello Elevated Entropy, you hit it right on the head. The brake assembly is a huge heat sink. There's a cool video elsewhere in KZread land with a B747 doing an aborted take off test where they test the brakes to their max. You can see how toasty they can get. Thank you for stopping by Plane Simple. PS: That's a great user name you have.

Loved it. Finally learned it.

@planesimple8514

Жыл бұрын

Thank you Antor.

excellent explanation!!

@planesimple8514

Жыл бұрын

Thank you.

Thank you for explaining this very helpful

@planesimple8514

3 жыл бұрын

Thank you ITzPoWeRzZ, i appreciate it.

Thanks, very informative, was curious how brakes on an airplane worked.

@planesimple8514

2 жыл бұрын

Thank you, I'm glad you liked it.

Awesome ! Thanks a lot !

Great explanation 👍

@planesimple8514

2 жыл бұрын

Thank you Dubris

Thank You. This is really good

@planesimple8514

3 жыл бұрын

Hello Yolanda, thank you and welcome to Plane Simple.

What sort of cooling do the brakes have? I mean does air get drawn in from the caliper side or outward side? Does that make sense?, really interesting stuff man!

Superb 👍 Thank you so much !!

@planesimple8514

Жыл бұрын

Thank you suhailrs.

Great video 😄

@planesimple8514

Жыл бұрын

Thanks Eduardo.

Awesome stuff!!!

@planesimple8514

3 жыл бұрын

Thank you Jinorri Wilson

What hydraulic fluid is usually used in larger aircraft brakes? I’m assuming it has to possess an extremely high boiling point due to the heat generated.

great explanation , every one should know this

@planesimple8514

2 жыл бұрын

Thank you. Check out the comments below by Basil Tyler, he added a lot more info that is interesting.

Excellent video, thank you! I had a query - how would we know if there is a problem with brake binding? Would there be a pronounced aircraft veer in the direction of brake binding and also an accompanied significant increase in temperature?

@planesimple8514

2 жыл бұрын

Hello TheMordecai1985, if you get binding to the point of locking up the wheel, the wheel speed sensor would give you a fault message in the cockpit, and yes, that would be a companied by the aircraft pulling to that side. However, that's a very unlikely scenario since the brakes and wheels are inspected and serviced regularly well in advance of any of that happening.

@TheMordecai1985

2 жыл бұрын

@@planesimple8514 thank you so much for your reply! :)

@planesimple8514

2 жыл бұрын

My pleasure.

Hypothetically could you fit an electric drive motor on the gear for a plane and use that to drive the plane on the taxiway? and use like "regen" braking to slow planes down?

@planesimple8514

2 жыл бұрын

Hello Toni-420, I guess you could, but I can think of a couple of things against it... One, the amount of breaking during taxi is minimal, and the energy recuperated from that regen would not offset the energy required to then carry the weight of those electric motors along doing nothing for the rest of the flight, and... Two, during landing, the heat generated by the normal mechanical brakes would absolutely roast the electrical motors. Good thinking though. It is "out of the box" thought exercises like that that move progress along.

Excellent explanation 👍🏻👍🏻

@planesimple8514

11 ай бұрын

Thank you, I appreciate it.

Modern multi disc brake packs work on the same principle as an oil immersed HeleShaw Beecham Multidisc clutch used in motorbikes older cars, lorries,tractors, marine and industrial applications.

@planesimple8514

2 жыл бұрын

Yes! I refered to that in the video and referred to an excellent video by "This Old Tony" explaining the motorcycle oil immersed clutch.

@basiltaylor8910

2 жыл бұрын

@@planesimple8514 yes , i am well aware, but it was in the 1920,s, a British Army Colonel Hele-Shaw pioneered multiple disc clutches suitable for use in tank gearboxes(transmissions), . Found the video interesting but dis jointed. I view the multi disc brake pack as a stack of 75 rpm records on a commercial grade stacking juke box. four or more records are the discs or rotors, four other records stators each coated both sides with friction material ,like Ferodo,or Mintex . the non coated records have tongues like you said, that slide in a slot machined inside each wheel rim us imparting the braking force to slow the plane down. A beefy titanium casting holds six pistons. These six pistons work the same way as a cider cheese press, pressing the discs rotors against the stators fixed discs with a pressure of five thousand pounds per square inch of a typical large aircraft brake system manufactured by Allied Signal Honeywell , Dunlop,and Messier Dowty.

@planesimple8514

2 жыл бұрын

You are feeding me brain candy! And I'm eating every bit of it. Thank you. As far as KZread comments go, your comments are a whole dissertation. This kind of knowledge is priceless for those that are interested. Thank you very much. You've given me a lot of material to read more about for my own edification.

Very beautiful explaination

@planesimple8514

3 жыл бұрын

Thank you very much Satwik Santannavar. I appreciate you taking the time to leave me a positive comment. Thanks.

Thanks!!

@planesimple8514

Жыл бұрын

My pleasure

Thanks.

how quickly could a new set of brakes on a Boeing 767-200 bring it from going 200+ mph (takeoff speed) to a full stop? (without using reverse thrust)

@planesimple8514

Жыл бұрын

Hello Derek Wall. The short answer to your question is...I have no idea. I've never worked on any 767 and haven't read any of it's performance books either. There are some cool videos elsewhere in KZread land that show exactly that test (an aborted take off) but on a B747, it's awesome.

Nice effort but it would be even easier to understand if it is animated

@planesimple8514

Ай бұрын

Hello, unfortunately I do not have that ability. Thanks for the compliment though.

Can you make a Debooster Cylinder video?

Quick question where does the master cylinder located pilot of co pilots side or in the middle???

@planesimple8514

3 жыл бұрын

Hello Joseph. Most of the time there are four master cylinders, each one directly attached to each rudder/brake pedal. That means that the pilot's left rudder pedal is also the the brake pedal for the left wheel brake, and the pilot's right rudder pedal is also the brake pedal for the right wheel brake. The copilot's side also has the same arrangement so either pilot can control the brakes. This brings the number of master cylinders to four. And this also gives you the ability to have differential braking since you can control left or right brakes independently. Some light aircrafts have the pilot's and copilot's rudder pedals mechanically linked or welded together, in those cases, pilot's share the same two master cylinders mounted somewhere in common to both.

@josephhaimanot8196

3 жыл бұрын

@@planesimple8514 thank you 🙏

@planesimple8514

3 жыл бұрын

You are welcome. Any time. If you want to see one example of master cylinders, you can see it in my video about an "abandoned KitFox". There I take a bit of a tour of the plane and I believe you can see the brake master cylinder.

Ty

@planesimple8514

Жыл бұрын

Yw

Any idea why the rotors stay still and the pads spin?

@planesimple8514

2 жыл бұрын

Hello Fennec Phaux. No, I don't really know why. I guess you could design it in either configuration.

How we know brakes wear (with brake wear indicator)how it is works

@planesimple8514

3 жыл бұрын

Hello SUVVADA. Brake assemblies get replaced on a Cycles basis. They get replaced after a given number of landings, but get inspected regularly throughout their service life for anomalies, defects and abnormal wear. There is no wear sensor like in a car(at least not that I'm aware of).

Thank you Material of the pads and discs??

@planesimple8514

3 жыл бұрын

Ah, great question but one that I don't know enough to answer in detail. I can tell you that the discs are some steel alloy and that the pads are a mix of any number things depending on the application. As far as the alloy of the steel goes, I'm sure there are variations but I wouldn't know specifics and most likely are different from one plane to the next. Pads, are probably a mix of friction materials(metals, ceramics, carbon, etc) embedded in a matrix(another long chain material like carbon) to hold it all together. I know this is a broad answer but that's as much as I know regarding their composition. I hope this helps and thanks for watching.

@chrispenick113

3 жыл бұрын

The rotors and stators shown in the video are steel on steel which is older technology but still very much in use on some aircraft. Modern aircraft (or older ones that have been retrofitted) use carbon rotors and stators. The carbon recipes are proprietary. The carbon/carbon brakes are much quieter than steel/steel brakes and have a much better heat absorption and dissipation properties. The “larger” one shown in the video may be along the lines of an older 737 aircraft (or about that size of airframe). The wheels and brake sets for aircraft like the 777 and A340 and A380 are much bigger.

@planesimple8514

3 жыл бұрын

Man! Thank you so much for chiming in with more knowledge. I love the fact that people more knowledgeable than me can jump in and complete the picture for everyone.

@chrispenick113

3 жыл бұрын

@@planesimple8514 No prob. Spent 16+ years in engineering for an aircraft wheel and brake manufacturer. It is a great industry to work in. Check out this video of an A380 rejected take off test on a road wheel dynamometer. The carbon disks get white hot and flame up. kzread.info/dash/bejne/o5mrkpugkdKZg5s.html

@planesimple8514

3 жыл бұрын

@@chrispenick113 Dude, thanks again for chiming in. It's an honor to have an industry expert participating here. Welcome to Plane Simple!

Interesting video I would like know about aircraft mechanic

@planesimple8514

3 жыл бұрын

Thank you. I'm glad you found it interesting.

@planesimple8514

3 жыл бұрын

Being an aircraft mechanic is a pretty cool carrier. Look into any local school and pay them a visit.

how much do you get paid for this job ... or how much for an hour ?

@planesimple8514

3 жыл бұрын

For interior technicians it ranges from $20 to mid $30's, for mechanics it goes from $20 to $50's.

👍

Respect 🫡

@planesimple8514

2 ай бұрын

Thank you Sir! 🫡

❤😮

Just seen another video not about brakes on air craft, pilot was showing how they cool them on ground with fans. First thing when I seen it I thought that looks like a motorcycle clutch let me look for a video on how they work. Lol long ass story

I still not so understand why it need to convert to heat

@planesimple8514

2 жыл бұрын

Hello Jing Jie Lim, think of it this way: The aircraft is a heavy mass that is moving very fast, that means that it has a lot of kinetic energy (motion energy). To stop the airplane you need to get rid of all that energy in any way possible. Since energy cannot be created or destroyed, you have to convert all that kinetic energy into another for of energy. You could attach electrical generators to the aircraft wheels and convert the kinetic energy or the motion of the airplane into electricity(this is regenerative braking in electric cars). There's is two problems with that approach. One is that those generators are a heavy load to carry for the entire flight, only to be used during landing, and the amount of energy recovered by the generators is not comparable to the energy from fuel required to carry the generators around for the flights, therefore you'd waste more energy carrying the generators that the energy you would recover during landing. Problem number two is that the generators provide a limited braking capacity and would take a long time to convert all that kinetic energy into electric energy, and thus take a long time to slow the plane down. This would require excessively long runways. To stop the airplane fast you need to convert that kinetic energy into another form of energy as fast as possible, and so far the most effective way is to convert it to thermal energy, heat. The brake assemblies are relatively light and do an amazing job of converting motion into heat and as such, do an amazing job of stoping the plane. This was a long answer, but now you know that you don't need heat, you need to stop the plane, the heat just happens to be the result of converting all that kinetic energy into another form. I hope this helps. Thanks for coming by Plane Simple.

Do you realise that disc brake conversion kits offered by BF Goodrich ,Menasco ,or Hayes for DC-3 Dakota, DC-4 Skymaster, Both of a medium and larger size,.The said kits use the same arrangement,as described of a single disc and caliper . The single disc caliper set up pioneered by French Brake Manufacturer Pierrot before world war two with sets fitted to the Breguet 69 a small twin engine multi role fighter.The limitations of such an arrangement on a large four engine cargo passenger transport is clearly evident , especially one lacking reversible pitch propellers. Yet such large transports so fitted are in daily service in Canada and Alaska.flying in and out of short rough dirt strips. That is why in the mid late 1940,s BF Goodrich,Messier and Dunlop invented the multi-disc brake pack, more brake power for your dollars.

@planesimple8514

2 жыл бұрын

Very interesting Basil Taylor. Thanks for adding to the common knowledge in the channel.

@basiltaylor8910

2 жыл бұрын

@@planesimple8514You are most welcome and know my stuff, before reliable single disc brakes came available from BF Goodrich and Pierot, small planes used expander tube drum brakes by Dunlop and Palmer, some american small planes ,like Stinson,s Travel Airs, Bellancas were fitted with Bendix internal expanding shoe drum brakes like an old Model A Ford.

@planesimple8514

2 жыл бұрын

Man, you really know your stuff! You are a very welcome addition to the "Plane Simple" channel and community.

@basiltaylor8910

2 жыл бұрын

@@planesimple8514 Thank you for the kind comment ,it is appreciated and yes i do know my stuff. Reliable brakes for aeroplanes of all sizes became available in the late 1920, s early,30. Their designs followed then current car and lorry(truck) practice. A steel drum shrunk or pressed fitted in the alloy aeroplane wheel. In the case of Dunlop,s expander tube brake, a rubberised fabric bag shaped like a brackwurst sausage is fitted to a normal back plate bolted to the axle or oleo leg. Bonded on the outside of the sausage is a row of Ferodo brake blocks ,like those on a bicycle. When the brake lever is applied on the control stick, hydraulic fluid or compressed air inflates the sausage thus pressing the blocks against the drum to slow or stop it from rotating, thus enabling the pilot to control his or her plane on small isolated dirt or grass aerodromes . How,s that for a Hershey Bar.

Hypothetically could you fit an electric drive motor on the gear for a plane and use that to drive the plane on the taxiway? and use like "regen" braking to slow planes down?

@planesimple8514

Жыл бұрын

Hello Toni-420, yes, I guess you could. There are several things to consider though. Landing and taxiing are a very small portion of the operation of the aircraft. Is the total energy saved by using the electric drive for taxi, and regen braking more than the energy cost of carrying the extra weight of the electric motors and batteries along for the rest of the flight? If it costs more energy to carry that weight around than the energy you save by using the system, then the system is a net loss, not a gain. Also, regen braking is not as effective at absorbing large amounts of energy as traditional braking, so you'd have to supplement it by using traditional brakes which generate A LOT of heat. This would be a very extreme environment for the electric motor/generator and it would probably cook. You could relocate the motor/generator away from the wheels and the source of heat, and drive the wheels remotely via shafts, etc, but now you are adding more complexity and more weight, again taking away from the overall gains.