The de Havilland / AIRCO DH.9 two seater tractor biplane designed and built by The Aircraft Manufacturing Co. Ltd., Hendon, London, N.W.9. – Engine 250 h.p. Siddeley "Puma". Speed at 10,000ft., 110
Siddeley 'Puma' 230 hp WWI aero engine - MAAS Collection
Siddeley Puma-Powered DH.9 E8894 Performs First Post-Restoration Flight
Siddeley 'Puma' 230 hp WWI aero engine - MAAS Collection