This page no longer updated from 31 October 2001. Latest version can be found at Gamma 2

Designer: Bristol Siddley. Used on stages: Black Arrow-2. Used on launch vehicles: Black Arrow. Propellants: H2O2/Kerosene Thrust(vac): 6,958 kgf. Thrust(vac): 68.20 kN. Isp: 265 sec. Isp (sea level): 251 sec. Burn time: 113 sec. Mass Engine: 173 kg. Diameter: 1.4 m. Chambers: 1. Thrust to Weight Ratio: 40.22. Country: UK. Status: Out of Production. First Flight: 1969. Last Flight: 1971. Flown: 4.

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.

Back to Index
Last update 12 March 2001.
Definitions of Technical Terms.
Contact Mark Wade with any corrections or comments.
Conditions for use of drawings, pictures, or other materials from this site..
© Mark Wade, 2001 .