Yakovlev yak 130 russian air force warplanes. Fundamentally a development of the robust and successful yak 7b fighter based in turn on a tandem seat advanced trainer yak 7uti the yak 9 arrived to soviet fighter aviation regiments at the stalingrad front in december 1942 and. Yakovlev yak 9 was a single engine single seat multipurpose fighter aircraft used by the soviet union in world war ii and after. It was a single seat monoplane with a composite structure and wooden wings. The yakovlev yak 9 russian.