In my book "The end of Forked Ghosts" (free to download at http://cmeunier.chez-alice.fr/Free_EoFG_MV.htm ), the caption of my drawing of it is this:
* The single-seater Byelyayev OI-2 (maybe Odnomyestniy Istribityel 2-motorniy) used the
central-engined fuselage of the P-39 Airacobra, doubled and adapted. The name Tvin-Aerokobra
has been mentioned, years later. To compare, actual-fiction Twin-Airacobra are presented later in
this book, they are very different – the OI-2 was using the principle of the P-39 central engine, not
the parts of available P-39s. Estimated speed 485mph (780km/h) was very high in early 1941.
The central wing housed a load bay.