with a container for 200–250 kg (441-551 lb) of chemicals. 1,235 were built in 1930–1940. U-2G: This experimental aircraft had all the controls linked to the control column. One aircraft only. U-2KL: Two aircraft fitted with a bulged canopy over the rear cabin. U-2LSh: Two-seat ground-attack, close-support aircraft. The aircraft were armed with one 7.62 mm (0.30 in) ShKAS machine-gun in the rear cockpit. It could also carry up to 120 kg (265 lb) of bombs and(or?) four RS-82 rockets. Also known as the U-2VOM-1. U-2LPL: Experimental prone-pilot research aircraft. U-2M: This floatplane version was fitted with a large central float and two small stabilizing floats. Not built in large numbers. Also known as the MU-2. U-2P: Floatplane version, built only in limited numbers, in several variants with different designations. U-2S: Air ambulance version, built from 1934. It could take a physician and an injured on a stretcher on a rear fuselage, under a cover. Variant U-2S-1 from 1939 had a raised fuselage top upon the stretcher. From 1941 there were also used two containers for stretchers, that could be fitted over lower wings or two containers for two seating injured each, fitted under lower wings. U-2SS: Air ambulance aircraft. U-2ShS: Staff liaison version, built from 1943. It had a wider fuselage and a closed 4-place rear cab. U-2SP: Civil transport version, could carry two passengers in open individual cabs, built from 1933. Other roles included aerial survey, and aerial photography. A total of 861 were built between 1934 and 1939. U-2SPL: This limousine version was fitted with rear cabin for two passengers. U-2UT: Two-seat training aircraft, powered by an 86 kW (115 hp) M-11D radial piston engine. Built in limited numbers. U-2LNB: Somewhat like the earlier -LSh version, a Soviet Air Force two-seat night attack version, built from 1942. Armed with one 7.62 mm (0.30 in) ShKAS for rear defense, plus up to 250 kg of bombs under the wings for land support. Earlier aircraft were converted to improvised bombers from 1941. U-2VS : Two-seat training and utility aircraft. Later redesignated Po-2VS after 1944. U-2NAK: Two-seat night artillery observation, reconnaissance aircraft. Built from 1943. U-3: Improved flying training model, fitted a 149 kW (200 hp) seven cylinder M-48 radial engine. U-4: Cleaned-up version with slimmer fuselage; not built in large numbers. - (Total U-2 manufacture: 33,000) Po-2: Postwar basic trainer variant. Po-2A: Postwar agricultural variant. Po-2GN: "Voice from the