[PAR] [TLE] Bristol Aquila [SEP] The Aquila was a nine-cylinder single-row radial aircraft engine designed by the Bristol Engine Company starting in 1934.  A sleeve valve engine, its basic design was developed from the Bristol Perseus.  The Aquila was never used in production, but further developments led to the Bristol Hercules, Bristol Taurus, and Bristol Centaurus. [PAR] [TLE] Bristol Hercules [SEP] The Bristol Hercules 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 first of their single sleeve valve (Burt-McCollum, or Argyll, type) designs to see widespread use, powering many aircraft in the mid-World War II timeframe.
[PAR] [TLE] Bristol Aquila [ SEP ] The Aquila was a nine - cylinder single - row radial aircraft engine designed by the Bristol Engine Company starting in 1934 . A sleeve valve engine , its basic design was developed from the Bristol Perseus . The Aquila was never used in production , but further developments led to the Bristol Hercules , Bristol Taurus , and Bristol Centaurus . [PAR] [TLE] Bristol Hercules [ SEP ] The Bristol Hercules 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 first of their single sleeve valve ( Burt - McCollum , or Argyll , type ) designs to see widespread use , powering many aircraft in the mid - World War II timeframe .
Who was the desiner for the further developments of Aquila which became 14-cylinder two-row radial aircraft engine?
Who was the desiner for the further developments of Aquila which became 14-cylinder two - row radial aircraft engine ?
Sir Roy Fedden
Sir Roy Fedden