Mignet Pou-du-Ciel KRS 1 Inch Round Button

A good old Pou-du-Ciel button. The Flying Flea (Pou du Ciel literally "Louse of the Sky" in French) is a large family of light homebuilt aircraft. In 1933, Mignet successfully flew for the first time in his HM.14, the original flying flea, and publicly demonstrated it. In 1934, he published the plans and building instructions in his book Le Sport de l'Air. In 1935, it was translated into English and serialised in Practical Mechanics, prompting hundreds of people to build their own Flying Fleas. Mignet's original HM.14 prototype aircraft was powered by a 17 hp (13 kW) Aubier-Dunne 500 cc two stroke motorcycle engine. It had a wingspan of 19.5 feet (5.9 m), a length of 11.5 feet (3.5 m) and a gross weight of 450 lb (204 kg).[5] It had a usable speed range of 25-62 mph (40–100 km/h). In the UK in 1935 and 1936, many aerodynamic and engine developments took place, notably by Stephen Appleby, John Carden and L.E. Baynes.