Technical data
Type	UT-2	UT-2M	UT-2MV	UT-2 1944
Function	Trainer		Light Bomber	Proto- type
Year	1938	1941	1942?	1943
Crew	2
Engine	M-11	M-11	M-11D	M-11?
Power (hp)	100	100	115	100?
Size
Length (m)	7.0
Height (m)	?
Wingspan (m)	10.2
Wing area (m2)	17.2
Weights (kg)
Empty	616		?	633
Loaded	856	938	1150	905
Loads
Wing Load (kg/m2)	50	55	67	53
Power load (kg/hp)	8.6	9.4	10	?
Speed (km/h)
at 0m	205	205	177>	?
Landing	90	95>	?	?
Roll (m, sec)
Landing	235, 16	200, 15	?	?
Takeoff	200, 13	175, 12.5	?	?
Maneuverability
Turn time	14sec
Range (km)
Normal	500	1130	?	?
Flight Endurance
Normal	2.5h	7h	?h	?h
Ceiling (m)
Max.	3500	3100	3350	?
Climb (min)
1000m	4.8	5.8	8	?
3000m	21.6	31	?	?
Payload
Fuel+Oil (kg)	64	146	?	?
Armament
Guns	none			?
Bombs	none			200(+) kg

After successful prototype trials, mass production of UT-2 started in November 1937 on two factories. Technological simplicity gave the trainer production quick start, and it was eventually expanded to five factories, totaling 7243.

When first batches of UT-2 arrived to the airfields of training units, dangerous flat spin behaviour was noticed. Aircraft easily entered spin, and was too slow getting out. Extensive studies in Yakovlev KB (test-pilot V.L.Rastorguev) allowed to solve problem by minimal changes (controls adjustment plus tailplane installation angle).

Modified UT-2 entered production in 1941 as UT-2M. It utilized higher quality materials and differed by increased wing anhedral and sweep, revised shape of the tail surfaces, decreased ailerons area and other minor details. UT-2M had very good handling, never entered the flat spin. In case of steep spin it was enough to keep controls in neutral position.

In Summer 1941 UT-2 replaced N.N.Polikarpov's U-2 biplane as a primary trainer. Production and development of the type continued until 1944. Even in war time production rate was 3...4 planes/day.

Some batches had 115hp M-11D engine. Those aircraft had increased ceiling 4700m instead 3500. Two airframes were fitted with MV-6 engine (aircraft 'N°23', 'N°24'), but this change did not enter series production.

During the War some UT-2's were armed and used as light bombers (like the U-2). Those variants (UT-2MV among them) carried 200kg (or more) of bombs. In 'field' workshops some UT-2 were armed with one or two ShKAS machineguns, RS-82 rockets were fitted. None of those armed version was built in series.

Since 1942 a 'divergent' design started taking shape. It had a green-house glazed canopy, later received fairings covering engine cylinders, new undercarriage, tailwheel instead of tailskid, landing flaps... It was finished and flown in 1943, getting designation 'UT-2 standard 1944' (sometimes mistaken as UT-2MV). It was an obvious transition to the post-war line of Yakovlev's trainers and aerobatic machines. Second suggested role of this aircraft was a liaison, in this configuration it had increased fuel capacity and takeoff weight of 991kg.

This aircraft did not enter mass production because Yak-18 incorporated much more advanced features (some tested and refined during 'standard 1944' construction).

Prototypes	Developments
Ya-20/UT-2 prototypes	Yak-5	Yak-18