L. E. Baynes

Leslie Everett Baynes AFRAeS
At Heston Airport 3 October 1935; L. E. Baynes on left, Sir John Carden in centre, Stephen Appleby on right
Born	(1902-03-23)23 March 1902 Barnes, Surrey, England
Died	13 March 1989(1989-03-13) (aged 86) Swanage, Dorset, England
Nationality	United Kingdom
Occupation	aeronautical engineer

Leslie Everett Baynes, AFRAeS (23 March 1902 – 13 March 1989) was an English aeronautical engineer.

Born at Barnes, Surrey, on 23 March 1902 the son of James and Florence Baynes. Baynes was educated at Gresham's School, Norfolk, leaving school at the age of sixteen to join an aircraft company. He developed engineering skills at school and in industry.

After leaving school, Baynes started work in the fledgling aircraft industry with Airco (The Aircraft Manufacturing Company) at Hendon Aerodrome. From there, he moved on to Short Brothers at Rochester, where he redesigned the Short Singapore flying boat.

In 1930, Baynes designed the Scud light sailplane, built at first by Brant Aircraft Limited at Croydon. The Scud was successful, and in 1931, Baynes went into partnership with E.D. Abbott as Abbott-Baynes Sailplanes Ltd, of Farnham, Surrey, to build Scud I sailplanes, and later the Scud II (1932). In 1935, a Scud II flown by Mungo Buxton took the British Height Record for a glider to 8,750 feet (2,666 m).

In 1935, Sir John Carden, an authority on tank design who was interested in gliding, outlined to Baynes his requirements for a self-launching sailplane. Baynes designed the Scud III sailplane, built by Abbott-Baynes Sailplanes, which when fitted with an engine was called the Carden-Baynes Auxiliary. That carried a retractable 249 cc Villiers engine mounted on top of the fuselage. The engine drove a pusher-propeller and produced 9 bhp, and the capacity of the fuel tank was enough to run the engine for thirty minutes. The 249 cc Auxiliary is believed to be the lowest-powered aircraft in the history of powered flight.