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« on: October 30, 2012, 07:09:38 PM »
anwar
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« Reply #1 on: October 30, 2012, 07:27:14 PM »
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the power of friction has made the disc glow red at 1.40.
just imagine the tremendous amount of heat that is generated.
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« Reply #2 on: October 30, 2012, 08:23:51 PM »
anwar
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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.
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« Reply #3 on: October 30, 2012, 08:37:16 PM »
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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.
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« Reply #4 on: October 30, 2012, 09:10:07 PM »
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have a look at the steam formed due to water evaporation from the discs at 2.22.
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« Reply #5 on: October 30, 2012, 09:13:36 PM »
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form this anwar sir i just recalled a similar video.
have a look.
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« Reply #6 on: October 30, 2012, 09:53:40 PM »
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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. Smiley
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« Reply #7 on: October 30, 2012, 10:54:17 PM »
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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
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