He was involved in the development of aircraft and gun - turret hydraulic systems .
Leslie George Frise FRAeS ( 2 July 1895 -- 26 September 1979 ) was a British aerospace engineer and aircraft designer ; he designed the Type 156 Bristol Beaufighter .
Leslie George Frise FRAeS was involved in the development of aircraft and gun - turret hydraulic systems .
Leslie George Frise FRAeS ( 2 July 1895 -- 26 September 1979 ) was a British aerospace engineer and aircraft designer ; he designed the Type 156 Bristol Beaufighter .