Development of the three-speed Scott Flying Squirrel began in 1922 as the company was in severe debt and faced receivership.

The bottom end block was painted green for racing or red for road, and had a centrally positioned flywheel, twin inboard main bearings, overhung crankpins, and doors for easy access to the engine.

[1] Captain Tom Moore, who became famous at the age of 99 in 2020 for raising £33m for NHS Charities Together, won several trophies racing a Flying Squirrel as a young man; a motorcycle on display in Bradford Industrial Museum was later found to be have been his.

[3] Between 1935 and 1938 the factory at Shipley in Yorkshire produced the B2592 air-cooled Aero engine, based on the Scott Flying Squirrel motorcycle unit.

[4] A 25 hp (19 kW) version was also specifically developed to power the notoriously dangerous Flying Flea aircraft.