RD-107

The RD-107 is a type of rocket engine initially used to launch R-7 Semyorka missiles. RD-107 engines were later used on space launch vehicles based on the R-7. As of 2007, very similar RD-117 engines are used to launch the Soyuz FG, which is in active service. [cite web |url=http://www.astronautix.com/engines/rd117.htm |title=RD-117 |publisher=Encyclopedia Astronautica]

Design

The RD-107 was designed under the direction of Valentin Glushko at the Gas Dynamics Laboratory-Experimental Design Bureau (OKB-456) between 1954 and 1957. It uses liquid oxygen and kerosene as propellants, with each engine comprised of four combustion chambers which share a single set of turbopumps.

Specifications

* Thrust 813 kN (183 klb_f) at liftoff
* Thrust 991 kN (223 klb_f) in vacuum
* Specific impulse 245 kgf·s/kg (2.40 kN·s/kg) at liftoff
* Specific impulse 310 kgf·s/kg (3.04 kN·s/kg) in vacuum
* Chamber pressure 5.85 MPa (848 psi)
* Propellants: Lox/kerosene

References

* cite book
coauthors = JOHN R. LONDON III
title = LEO on the Cheap
publisher = Air University Press
date = October 1994
pages = pp. 68-69
url = http://www.dunnspace.com/leo_on_the_cheap.htm
isbn = 0894991345
*