Are Air Brakes Better?

Thanks for putting up, informative simple and clear!

It is amazing how 95% of the parts haven't changed in 40 years.

in 21th centry, the air disc brake appeared, they have more stopping distance than drum air brake, same braking performance when it was heated. air drum brake on the other hand tend to stop longer distance when heated. air disc brake was used by TGV passenger train and large percentage of truck/buses in europe

if I'm not mistaken, the air disc brake's rotor is made of Carbon fibre-reinforced silicon carbide as well as brake pad. TGV passenger train is using this type of brake since 1980+, used on heavy truck will gave it a passenger car like feel. air disc brake work like a disc brake on many passenger cars, but the material of the brake is different and is actuated by air pressure

@11:24, WTF that animation is cute!

Great video, really cleared things up, adding park brakes and anti compound valves would be great too!

thanks aloooot man it helped me alot with my project you rockzzz

thats some good info!!! 5 stars

this video is too deadly!!! explains things perfecly for young simple minded, non mechanicly inclined suburbanite potheads like myself. thnk u so much for posting!! very helpfull

@qazwas2001 little more advanced, but yea pretty much the same

This video is great, it helps me a lot.

there was no metion of the park brake release valves

ESTA MUY INTERESANTE EL VIDEO AUQUE ES ALGO VIEJITO, ES EL MISMO PRINCIPIO DE SISTEMA DE FRENOS DE AIRE, GRACIAS POR COMPARTILO CON TODSS LOS USUARIOS DE ESTA PAGINA, SI TIENS MAS VIDEOS ASI SE LE AGRADESE

The US army does it right! Damn fine learning material.

well my trainer said study your airbrakes and this helped alot

the dmv should give this on dvd for the cdl manual on airbrakes

@qazwas2001 40 years, that would make this video from 1970, this video was probley made in the late 40's

@tomas599 The video is from 1967, that is the date at the start when it says "The United States Army Presents"

@qazwas2001 oh yeah 1967 at the start, yeah your right. wow looked 50's at the lates to me anyway.

check out the guy jack hammering away at 33 sec in. check out that protective gear " a hat"

wow i learned both how compressors and air brakes work in just 10 minutes!!! years of research.

best airbrake tutorial ive seen so far!

Except that my brakes operate on release of pressure, not by the pressure itself. If I lose pressure, my brakes are applied and I can't move. I believe that's true of all modern air brake systems.

@qazwas2001 MANY parts have changed and are different. I have just taken the AirBrake course.

THIS WAS VERY HELPFULL IN MY UNDERSTANDING OF HOW AIR BRAKE WORK, YES IT IS SOMEWHATE DATED, BUT I BELIEVE THE PRINCIPALS ARE THE SAME, THANKS AGAIN.

looney tunes! oh wait my bad

if you decide to coast downhill with the engine off or the engine suddenly dies.....you're fuuuuuucked.

I have 2 army trailers. Both 6 ton. When the air is in the reservoir but is not connected to the tractor the trailer will not move. Its backwards from civilian trailers. Mostly because in an emergency a guy could open the valve and drain the air in the trailer tank and release the brakes. Thus pulling the trailer to a safe location or whatever the army wants. Just no brakes on the trailer when the valve is open, not safe but they don't really care about that when in a combat mode. The design i

You are both right! He was correct at that time, and you are correct today.

Cool. Ah how things have changed since then.

that coil spring is just as big as the ones used in the suspension of a prius

why did i watch this?

that was a great explanation. I'm taking my air brake test next week and this helped me understand the reading material I just read!:D

i want a tv show like this

Congrulations to US Army... Now, I really understand how air brake system is operating... Thanks.

This video is great and easy to understand. Thanks US Army.

It's good easily understood

This video is superb. Excellent.

And that is why city buses go: PSSSSSSHHHHHHH

still don't understand

very informative 

These old Army videos are just awesome :)

old but gold.

This video is awesome I use in in my brakes class easy to understand can see all the parts moving and working

Good video. Would have appreciated more if it started by explaining why brake fluid system of brakes found in smaller vehicles was not brake system of choice for these heavy vehicles and can not be used here.

💀🖤

Thank you🙏🙏🙏🙏🙏

Salute

can't explain it better

It's a really cool introduction to the working principles of compressed air in semi trucks. Just be aware of some differences to modern air brake systems (correct me if I am wrong): a) no air-dryer or equivalent (you would have to drain air tanks more than once daily) and there is no supply tank before the two air-tanks to collect more moisture; b) no dash control elements (you would need to get out of the cab and manually open the one-way valves from the tanks to supply the system as well operate other components); c) there is an air-governor, in the video cut-in pressure 85psi and cut-out 105psi (no duty cycle could cause the compressor to run "hot" all-times - more oil, wear and overheating); d) the brake valve has a similar operation as modern ones but no abs valve or proportionate valve in the system to prevent wheel lock-ups or skidding; e) the system described in the video was made to a tractor, but I couldn't see the spring/parking brakes (in the end of the video, it's said that the trailer connected to the tractor has spring brakes); f) there are elements to make intake and exhaust air travel faster through the system, such as quick release valve between the front wheels and a relay valve in the back, but no safety devices such as directional valve to supply the system with air from the tank with greater pressure; g) by the end of video, a coupling is shown, but I couldn't see a TPS (tractor protection valve), which means a loss of air in the trailer could affect the tractor. The Bendix video (most commonly broken in four parts) seems to be a better option as an introduction to air brakes.