THE BRISTOL HERCULESE WAS A 14 CYLINDER TWO ROW RADIAL AIRCRAFT ENGINE
DESIGNED BY SIR ROY FEDDEN AND PRODUCED BY THE BRISTOL ENGINE COMPANY STARTING IN 1939.
IT WAS THE MOST NUMEROUS OF THEIR SINGLE SLEEVE VALVE DESIN, POWERING
MANY AIRCRAFT IN THE MID WORLD WAR II TIMEFRAME.
THE HERCULES POWERED A NUMBER OF AIRCRAFT TYPES, INCLUDING BRISTOL'S
OWN BEAUFLIGHTER HEAVY FIGHER DESIGN, ALTHOUGH IT WAS MORE COMMONLY USED ON BOMBERS.
THE HERCULES ALSO SAW USE IN CIVILIAN DESIGN, CULMINATING IN THE
714 AND 737 ENGINES FOR SUCH AS THE HANDLEY PAGE HASTINGS C1 AND C3 AND BRISTOL FREIGHTER.