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Aviation History
1951
1951 - 1774.PDF
-» September 1951 313 Armstrong Siddeley Sapphire ASSa 3 (7,200 Ib thrust). Armstrong Siddeley Snarler ASn I Rocket. AND JETS r vick, who also produced the Beryls in the S.R/A.i, no longer build aircraft gas turbines. Sapphires are to be installed in American Canberras. Among the company's turboprop units the Double Mamba—in production for the Navy—is of particular interest in being designed to run as two independent units, thus allowing one half to be shut down or started according to requirements during a flight. Civil versions of the Mamba, most compact of turboprops, continue to fly in several prototypes. The Python was the first Armstrong Siddeley turboprop, and this large and powerful unit is in small- scale production—also for the Navy. Bearing a marked similarity to each other, and having features in common with the Mamba, the Adder and Viper are both small axial turbojets, but the latter is an expendable unit for target aircraft. It has been designed for a life of ten hours, and cheap materials are used wherever possible. It has the remarkable weight/power ratio of 0.24 lb per lb thrust. An Australian pilotless research and target-type air- craft is to have Viper power. The piloted prototype flew early this year with an Adder installed. Armstrong Siddeley Motors, Ltd., Coventry. (S.B.A.C. Stand N.) Armstrong Siddeley Cheetah 17 (430 h.p.). Wackburn and General Aircraft Cirrus Bombardier 702 (l80drV)\ V/V11 -OQl Blackburn and General Aircrafi Cirrus Minor II 100 h.p.). Blackburn and General Aircraft Cirrus Major III (158 h.p.).
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