ScramJet success!

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Experimental aircraft speeds to more than 3,000 mph in test flight - latimes.com

Quote:
At about 50,000 feet, near Point Mugu, it was released like a bomb and engaged a solid rocket booster that accelerated it to Mach 4.8 in about 26 seconds.
After separating from the booster, the X-51A scramjet engine then lit and sped to Mach 5.1 at 60,000 feet.
Talk about acceleration!
That has to be a kick in the pants (eventually )
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Mach 5? Already been done!
USMC:

Speed and Trixie were doing this without a rocket in the early 1960s:

The Real Mach 5 - Speed Racer

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