Black Arrow was a Saro developed three-stage satellite launcher. It is best known for having placed the "Prospero" satellite in orbit. The first stage was powered by four examples of the Armstrong Siddeley
Gamma II HTP / Kerosene rocket engine, the second stage having two Gamma HTP / Kerosene engines with the thiurd stage being powered by a Waxwing apogee kick motor. Black Arrow was a successful launcher of satellites into Low Earth Orbit, including Prospero.A follow-on was SLAVE (Saro Satellite LAunch VEhicle) which used eight
Stentor main chambers instead of the Gammas in the first stage.The photograph shows a scale model of Black Arrow as launched that is displayed in the Museum of Flight at East Fortune.
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