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Rocket Engines

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11D-513
11D-57
11D-58
Aerospike
Aestus
HM7B
LE-5
LE-7
MA-5
NK-31 / 39
NK-33 / 43
RD-120
RD-170
RD-180
RL-10
RL-60
RS-27
RS-68
RS-72
RS-76
SSME
Viking
Vulcain
  Viking - Specifications
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Engine Performance

Viking 4B Viking 5C Viking 6
Propellant Combination
     Oxidizer
     Fuel		 N2O4 / UH25 N2O4 / UH25 N2O4 / UH25
Engine Cycle: Gas Generator Gas Generator Gas Generator
Average Thrust: 177,000 lbf
785 kN		 152,000 lbf SL / 171,000 lbf vac
676.9 kN SL / 785 kN vac		 152,000 lbf SL / 171,000 lbf vac
676.9 kN SL / 785 kN vac
Chamber Pressure: (Pc) 848 psia
58.5 bar		 848 psia
58.5 bar		 848 psia
58.5 bar
Mixture Ratio: 1.7 : 1 1.7 : 1 1.7 : 1
Isp: 293.5 sec 248.5 sec vac
278.4 sec vac		 248.5 sec vac
278.4 sec vac
Nozzle Area Ratio: 30.8 : 1 10.5 : 1 10.5 : 1
Gimbal Capability: ± 3 degrees ± 6 degrees No
(10 deg fixed, canted nozzles)
Engine Mass: --- --- ---
Engine Thrust to Weight --- --- ---
Mixture Ratio Control: --- --- ---
Throttle Range: (% Pc) 100% only 100% only 100% only
Restart Capability: No No No
Engine Size:
     Length / Diameter		 --- --- ---
Flight Status Flight Qualified Flight Qualified Flight Qualified
Launch Vehicles: Ariane 4 Second Stage Ariane 4 First Stage Ariane 4 Liquid Booster

* Engine performance from Steven J. Isakowitz "International Reference Guide to Space Launch Systems".

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