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by mrhyyyyde 1793 days ago
The X-15 has recorded 7,274 km/h airspeeds. I'm no airspeed record expert but did some reading.
1 comments
dogorman 1793 days ago
The X-15 was a rocket.
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mrhyyyyde 1788 days ago
Just because it has a rocket engine, that doesn't mean it's a "rocket", it's a rocket-propelled aircraft.
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