Technical data
Type U-2 with thick wing
Function Trainer prototype
Year 1927
Crew 2
Engines 1*100hp M-11
Length 8.10m
Wingspan 11.0m
Wing area 34.0m2
Empty weight 758kg
Loaded weight 1013kg
Wing Load (kg/m2) 30.0
Power load (kg/hp) 10.1
Speed at 0m 140km/h
Speed at 3000m 100km/h
Landing Speed 65km/h
Landing Roll 95m 9sec
Takeoff Roll 100m 10sec
Turn time 22sec
Range 350km
Flight Endurance 3.5h
Ceiling 3000m
1000m 11.5min
2000m 29.0min
Fuel+Oil 95kg

U-2 with thick wing, N.N.Polikarpov

The first of the famous multi-role biplane line. It differed from successors by thick (14%) wing to provide maximum lift at low speed - and absolutely disappointing performance. Aircraft was made extremely robust (17g for case Ak) and easy to assemble, but on expense of bad airdynamic and more than 120kg overweight.

Aircraft had very bad climb even for primary trainer. It may be remembered as an example of extremities in design, when too much is paid for reliability and simplicity.

Predecessor(s)Modification(s)Following design(s)
None None U-2 trainer

  • "History of aircraft construction in the USSR", Vol.1 p.388;
  • ...
  • Created October 26, 1998 Back to
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