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speed brake

   Also found in: Wikipedia 0.01 sec.
speed brake
n.
A flap on an aircraft for decreasing speed while in flight in preparation for landing.


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It is used to protect the speed brake from high temperatures during launch.
To slow the craft for re-entry into the atmosphere, twin tail booms pivot upward, acting as a giant speed brake so the craft descends like a badminton shuttlecock.
And they are probing why the rudder speed brake gears original parts in the shuttle tails were never inspected in more than two decades of flight.
 
 
 
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