Yakovlev UT-1 - Variants

Variants

There were a large number of variants, the most numerous or noteworthy were:-

• AIR-14 - Prototype of UT-1
• AIR-18 - UT-1 with a 104 kW (140 hp) Renault Bengali 4 inline engine and closed canopy, retractable undercarriage.
• AIR-21 (Ya-21, UT-21) - UT-1 with 164 kW (220 hp) Renault Bengali 6 engine, tested in 1938-39, fixed undercarriage.
• UT-1b - Wartime attack version with 2 x ShKAS machine guns and 2 or 4 RS-82 rockets.
• UT-1E - (UT-1(15) For tests at TsAGI (sometimes confused with AIR-15, which was not a variant of UT-1).
• UT-1 Floatplane - with M-11Ye engine which later became standard in the majority of UT-1's.