BERTIN

L. Bertin, 23 rue de Rocroy, Paris. About 1908 Bertin began building helicopters. The machine below was exhibited in the 1913 Paris Salon. IMG:4965555019825936185_ill_097.jpg:Bertin. Uniform Aeroplane Scale Bertin. Uniform Aeroplane Scale | 1913. Monoplane. 2-seater. | | Length | feet (m.) | 29 (8.80) | | Span | feet (m.) | 34 (10.40) | | Area | sq. feet (m².) | 226 (21) | | Weight | machine, lbs. (kgs.) | 770 (350) | | useful lbs. (kgs.) |... | | Motor | h.p. | 100 Bertin | | Speed | max m.p.h. (km.) | 71 (115) | | Number built during 1912 | 1 | Remarks. —Wood and steel construction. On wheels only. Controls: warping and rear elevator.