The 5D67 engine and scramjet took the Kholod Hypersonic Flying Laboratory to Mach 6.47 in 1991, setting the record for the fastest atmospheric flight in history.
Details: Soviet liquid propellant engine model 5D67, 72 inches in height, on wheeled stand, weight approximately 300 lbs crated. Provenance: From the air and space collection of Professor Alexander Roudakov.
The Kholod, or Hypersonic Flying Laboratory (HFL) was created as a joint effort of the Russian Central Institute of Aviation Motors and NASA. Collectively, the Kholod was an experimental rocket design for testing dual-mode scramjet engines, both air and liquid-cooled, combined with a Russian SA-5 rocket booster, for a total of 6 engines: four solid fuel boosters, the main 5D67 engine, and another scramjet in the forward part of the rocket. In 1991 the Kholod reached a maximum speed of Mach 6.47 – at the time the fastest powered flight in history (not including spacecraft operating outside the Earth’s atmosphere).
The Hypersonic Flying Laboratory (HFL), or “Kholod” is comprised of an entire experimental system for testing a dual-mode scramjet, which is boosted by a modified Russian SA-5 missile.
Leave a Reply