U-2, Po-2 variants

U-2AP 'Duster' (Aeropyl, Aeroopylitel) Field Duster, 1930	MU-2, U-2M, U-2 single float Floatplane (S.A.Kocherigin), 1930	U-2 with Siemence engine For Polar Aviation, 1931	U-2SP 'Special' Three-seater, 1933	U-2-UT Trainer with M-11D engine, 1934
S-1, SS Ambulance, 1932	E-23 Experimental (N.G.Mikhelson), 1935	SPL, SP, Limo 'BashNeft' Paramedic, 1933/35	U-2 P.D.Grushin, 1935	U-2 with V-tail Experimental (Filatov), 1934
U-2 with horizontal position for pilot Experimental, 1939	U-2 with full-hand controls Experimental (Gorzhanu) 1934	U-4 Trainer, 1936	RV-23 Record setter, 1937	S-2 Ambulance, 1939
S-3, SKF Ambulance, 1939	SP on TsAGI floats 1940-1944	U-2PP, Po-2PP on TsAGI floats 1944	S-2 on floats S.A.Mostovoj, 1946	U-2 on floats M.A.Kasparov, ?
S-2 on floats A.Ya.Scherbakov, 1942	U-2M, U-2P Floatplane (N.N.Polikarpov), ?	U-2 with on-wing mounted stretcher fairings Ambulance (G.I.Bakshaev), 1941	U-2 with under-wing stretcher fairings Ambulance (A.Ya.Scherbakov), ?	U-2S Ambulance, 1942
U-2VS, LNB, U-2LSh Bomber, 1941	U-2NAK Artillery Spotter, ?	U-2GN Propaganda, 1944	VOM-1 Firethrower, 1941	U-2 Limo Limousine (Zusman), 1943
U-2 Limo Limousine (N.N.Polikarpov, L.N.Marjin), 1943	U-2ShS Limousine (N.N.Polikarpov), ?	U-2 Limo, VG Limousine (V.P.Grigoriev), 1943	U-2L Limousine (A.N.Rafaelants), ?	U-2 with M-12 1943
Po-2U Trainer, 1946	Po-2S Ambulance, 1946	Po-2A Agricultural, 1946	Po-2L Passenger, 1948	Po-2LS Liaison Limousine, 1945
Po-2 on caterpillar gear Experimental, 1937 and 1947