1919 patented first automatic variable pitch airscrew,
1924–1927 responsible for aerodynamic design of Short Singapore Flying-Boat
1929–1930 Designed and manufactured first all-British glider to soar, the Scud I
1933–1935 Scud II sailplanes; British height record holder and international event winner
1935 Designed and built Scud III; first retractable-motored sailplane
1937 Designed Carden-Baynes Bee, first twin-engined pusher monoplane with wing-buried engines
1939 Project-designed gas turbine system 100 passenger long-range aircraft
1938 Designed and patented first V/TOL swivel turbine 'Heliplane'
Baynes Bat 1939–1945 Designed and built for Ministry of Supply (M.O.S.) experimental tail-less flying wing, Baynes Bat, for tank-carrying project initiated by Winston Churchill;
Designed and implemented conversion of Boston Bombers to Turbinlite searchlight aircraft, submarine guided missiles and other weapons and equipment for the RAF.