The Allison V-1710 is an American 12-cylinder, liquid-cooled supercharged V-engine. The Allison company manufactured reciprocating engines for 21 years. When production ceased in 1947, 47,000 examples of the V-1710 had been manufactured.
Allison V-1710 engines have seen very widespread service in American aircraft, and together with the Packard V-1650 (Rolls-Royce Merlin) the V-1710 formed the backbone of the in-line engine production in the USA. It was used in the Bell P-39 Airacobra, Lockheed P-38 Lightning, Curtiss P-40, North American P-51 Mustang, Bell P-63 Kingcobra and other aircraft.
Max. power output 1200 hp. Max engine speed 3000 r/min. Weight 655 kg.
Photo from Eugenius.