A civil-registered R-5 at Kastrup, Copenhagen, in 1934.
An Aeroflot R-5 (P-5) at Khorog in the Pamir mountains of Tadzhikistan.
The P-5bis conversion of the R-5, in this case Aeroflot's SSSR-L3816.
Yet another variant of the Polikarpov PO-2 (NATO: "Mule") utility two/three-seat biplane, this time used by the Polish Red Cross. Note M-11 radial's Townend ring, also cabin-type fuselage.
A U-2S2 ambulance - SSSR-K82.
The simple “shove him in a box” U-2 (Po-2) in wartime use.
An AIR-6 (Ya-6) with M-11 engine.
The KhAI-1 fairly closely resembled the Lockheed Orion. Production totalled 43.