In 1910 Copin was the assistant manager of the Borel flying school at Mourmelon, and in 1911 he built 2 monoplanes differing only in their engines. One is sometimes called the Copin-Revillard, but is likely properly to be Requillard. Both aircraft were small, with triangular-section covered fuselages, in general arrangement similar to the Hanriot. A large curved triangle above the trapezoidal elevator served as the vertical surface. One machine had an 80 hp Gnome with a 4-blade tractor propeller; the combination proved unsatisfactory and probably could not lift the machine. The other had a 50 hp water-cooled Chenu and an Integrate propeller, with a triangular metal cowl like some of the Antoinette models, and with side radiators. Damaged in October 1911, it flew again in December when it achieved a speed of 110 kmh. Emile Vedrines, brother of Jules, flew it in 1911 and 1912.

   (Span: 9 m; length: 7.5 m; 50 hp Chenu)