NASA Experimental Aircraft Images – X-38 Crew Return Vehicle cruising altitude
Two airframes were manufactured. They have flown a total of 15 flights between 1997-2001. This Advanced Technology Demonstrator for a Crew Return Vehicle from the International Space Station completed four captive flights beneath B-52 0008 during 1997, three in 1998, and then performed its first drop test on March 12, 1998.