RD-117

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RD-117[1]
Country of origin Russia
Date 1975
Designer NPO Energomash
Manufacturer NPO Energomash
Application First stage booster
Predecessor RD-107
Status Operational
Liquid-fuel engine
Propellant LOX / RP-1
Cycle Gas-generator
Performance
Thrust (SL) 778.65 kN (175,050 lbf)
Thrust-to-weight ratio 72.18[note 1]
Chamber pressure 53.2 bar (5,320 kPa)
Isp (vac.) 316 sec
Isp (SL) 253 sec
Burn time 130 sec
Dimensions
Length 2.87 m (9 ft 5 in)
Diameter 1.85 m (6 ft 1 in)
Dry weight 1,100 kg (2,400 lb)
Used in
Soyuz

The RD-117 is a rocket engine burning liquid oxygen and kerosene in a curious combustion cycle. An update of the RD-107, the RD-117 engines are used on the Soyuz-U.

Design[edit]

The engine is an updated version of the RD-107, mainly so it uses all Russian components.

History[edit]

Used on Soyuz-U orbital launcher.

References[edit]

  1. ^ "NPO Energomash Engines". NPO Energomash. Retrieved 30 June 2015. 

Notes[edit]

  1. ^ \frac{778,650\ \mathrm{N}}{(1,100\ \mathrm{kg})(9.807\ \mathrm{m/s^2})}=72.18