Designed by a collective [Аэроплан АПВ (Коллективный)] in 1909 under Alexander Petrovich Vernander (Александр Петрович ВЕРНАНДЕР - 1844-1918), professor of the Military Academy of Engineering, then second chief of the engineering bureau in Gatchina. Among the seven aircraft constructed in Gatchina one was christened „ласточку“ – swallow – a triplane that followed the Wright design but with curved wings, its propulsion consisting of a 25 hp REP engine, that drove two inward slanted propellers via bevel gear, to centre the air stream onto the rudder’s sides. Construction began in St. Petersburg in 1909, but the machine was not completed when construction ended in 1910.