Daniel O. Graham
Daniel O. Graham
|Born||April 13, 1925|
|Died||December 31, 1995 (aged 70)|
|Place of burial|
Daniel O. Graham (April 13, 1925 – December 31, 1995) was a U.S. Army officer. Graham was born in
Graham served again in the Office of National Estimates during 1968–1971, then served as director of collections for the
In later years, Graham devoted a lot of time to the research and development of Single-Stage To Orbit (SSTO) spacecraft in conjunction with
The first test launch of the DC-X was on August 18, 1993. The test flight verified flight control systems and vertical landing capabilities and was deemed a success after reaching a 46 m altitude in a 59-second flight. The second flight on September 11, 1993 tested ascent and landing mode control and ground effects survey, reaching 92 m in a 66-second flight. The third test flight on September 30, 1993 demonstrated 180 degree roll and provided aerostability data while reaching 370 m during 57 second flight. Unfortunately, this marked the last test of first series as the vehicle was mothballed when SDIO funding ran out.
On June 20, 1994, the DC-X rose once again for the first flight of second series after additional SDIO funding was received. Operating with a full propellent load, the flight tested the radar altimeter in control loop and reached an altitude of 870 m during a 136-second flight. Demonstrating an unplanned event on June 27, 1994, the DC-X became the first unmanned vehicle to save itself when an in-flight abort occurred after a gaseous hydrogen explosion. The vehicle demonstrated autoland its capabilities after reaching an altitude of 790 meters during a 78-second flight. After repairs were made, the DC-X continued expansion of the flight envelope on May 16, 1995, demonstrating constant angle of attack after reaching an altitude of 1330 m during a 124-second flight. Graham was elated and continued to work closely with the program. Graham would not live to see the full glory of the DC-X program. He died in December 1995.
On Friday, June 7, 1996 at