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

T
he 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
ReferencesLinks
  • "History of aircraft construction in the USSR" by V.B.Shavrov, Vol.1 p.388;
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    		• 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 30.0kg/m2
    Power load 10.1kg/hp
    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
    Climb
    1000m 11.5min
    2000m 29.0min
    Payload
    Fuel+Oil 95kg
    Created October 26, 1998
    by Alexandre Savine    		 Back to
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