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Title: Brake tests on 747 Post by: anwar on October 30, 2012, 07:09:38 PM http://www.youtube.com/watch?v=xjph9aopU7A&feature=share&noredirect=1
Title: Re: Brake tests on 747 Post by: saahil on October 30, 2012, 07:27:14 PM the power of friction has made the disc glow red at 1.40.
just imagine the tremendous amount of heat that is generated. Title: Re: Brake tests on 747 Post by: anwar on October 30, 2012, 08:23:51 PM From the description :
Quote In a novel new video, Boeing tests the worn-out — as in no material, just metal — brakes of a fully-loaded 747-8 Freighter by going through a pilot's worst-case liftoff scenario: aborting a takeoff. The successful result: 2,500-degrees-Fahrenheit brake pads, totally destroyed tires and plenty of tarmac left on the runway. Title: Re: Brake tests on 747 Post by: sushil_anand on October 30, 2012, 08:37:16 PM the power of friction has made the disc glow red at 1.41. just imagine the tremendous amount of heat that is generated. For what it's worth, the brake discs in a Formula F1 car reach similar temperatures several hundred times in a typical race scenario. they can - and do - slow down the car from 300+ km/hr to less than 100 in a little over one second! The forces involved are very high , over 4G. Title: Re: Brake tests on 747 Post by: saahil on October 30, 2012, 09:10:07 PM have a look at the steam formed due to water evaporation from the discs at 2.22.
Title: Re: Brake tests on 747 Post by: saahil on October 30, 2012, 09:13:36 PM form this anwar sir i just recalled a similar video.
have a look. http://www.youtube.com/watch?v=5JbnDXw-0pM Title: Re: Brake tests on 747 Post by: iamahuman on October 30, 2012, 09:53:40 PM For what it's worth, the brake discs in a Formula F1 car reach similar temperatures several hundred times in a typical race scenario. they can - and do - slow down the car from 300+ km/hr to less than 100 in a little over one second! The forces involved are very high , over 4G. Thanks for saying what I wanted to say. :)Title: Re: Brake tests on 747 Post by: AEROVISHWA on October 30, 2012, 10:54:17 PM did that " POWER OF FRICTION" thing in our college lathe... its called FRICTION WELDING...
thats hell of a het produced.. lucky to do with low carbon steel.. could not imagine doing that with HSS or tougher metals |