Payen first built a small single-seater AP-10, studied in collaboration with Aubrun. It was a light monoplane with triangular wing with a short length. This machine flew in Dieppe in 1935 and 1936, equipped with an AVA engine of 25 hp, then later a TRAIN of 40 hp. The AP-10 was extrapolated into the two-seater AP-12.
Wing span: 4.95m Length: 4.16 m Wing area: 10 sq.m Empty weight: 200 kg Max. gross weight: 340 kg Min. speed: 45 km/h Max. speed: 200 km/h