Before revision: The unmanned first flight test will drop the Dream Chaser prototype from an altitude of , where it is planned that the vehicle will autonomously fly to an unpowered landing at Dryden Flight Research Center .
After revision: by a Columbia 234-UT helicopterThe unmanned first flight test will drop the Dream Chaser prototype from an altitude of , where it is planned that the vehicle will autonomously fly to an unpowered landing at Dryden Flight Research Center .