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Designer: Bristol Siddley. Used on stages: Black Arrow-1. Used on launch vehicles: Black Arrow. Propellants: H2O2/Kerosene Thrust(vac): 23,945 kgf. Thrust(vac): 234.80 kN. Isp: 265 sec. Isp (sea level): 251 sec. Burn time: 142 sec. Mass Engine: 342 kg. Diameter: 2.0 m. Chambers: 1. Chamber Pressure: 47.40 bar. Oxidizer to Fuel Ratio: 8.20. Thrust to Weight Ratio: 70.01. Country: UK. Status: Out of Production. First Flight: 1969. Last Flight: 1971. Flown: 4. References: 225 .
Gamma engines were manufactured by Bristol Siddley and used on the Black Knight and Black Arrow launch vehicles. Propellants were High Test Peroxide and Kerosene. Black Knight used 4 chambers in two pairs on the Y and Z axes. The motors were gimballed to provide thrust in all axes.
Black Arrow was a three stage vehicle. The first stage had an 8 chamber layout with 4 pairs of Gamma engines gimballed as with Black Knight giving thrust in all axes. The second stage had two Gamma chambers with extended nozzles to give full expansion in vacuum. Both engines were gimballed to provide thrust in three axes.
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Last update 12 March 2001.
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© Mark Wade, 2001 .