ANT-31, I-14, P.O.Sukhoj (A.N.Tupolev bureau)

The first I-14 (b/w 48k) "History of aircraft construction in the USSR" by V.B.Shavrov, Vol.1 p.490

F
irst in the USSR all-metal low-wing monoplane with retractable landing gear. Other novelties included enclosed cockpit, breaks on main landing gear and smooth skin (instead of traditional corrugated). Project and construction were carried out by P.O.Sukhoj brigade at the KOSOS under the general supervision by A.N.Tupolev.
First experimental aircraft was ready in May 1933, powered with 580hp Bristol-Mercury VS-2 high altitude engine. Standard NACA cowling and wooden propeller were used. Aircraft skin was mixed - smooth on fuselage and fin, it was corrugated on wings and tailplane. Gear retraction was performed by steel wire. All system were installed, but aircraft was tested on fixed ski undercarriage.
Cockpit canopy was not sliding, instead its upper part was served as a hatch opening backwards. Few variants of armament were considered, all included cannons of different available types.
Test flights (K.A.Popov on controls) revealed good performance, aircraft was very sensitive to controls. The only shortcoming was 1.5-2 loops delay while getting out of spin.
Decision was made to build I-14 in series with several changes as the I-14bis.
PredecessorsModifications
None
ANT-31bis
ANT-43

References:
  • "History of aircraft construction in the USSR" by V.B.Shavrov, Vol.1 p.489-490;
  • Technical data
    Type I-14, ANT-31
    Function Fighter prototype
    Year 1933
    Crew 1
    Engines 1*580hp Bristol-Mercury VS-2
    Length -
    Wingspan 11.2m
    Wing area 16.9m2
    Loaded weight 1455kg
    Wing load 86.7kg/m2
    Power load 2.50kg/hp
    Speed at 0m 316km/h
    Speed at 3000m 384km/h
    Turn time 16.5sec
    Landing Speed 110km/h
    Landing Roll 260m
    Takeoff Roll 120m
    Ceiling 9400m
    Climb
    5000m 8.2min
    Armament
    Guns 1*7.62mm PV-1
    2*37mm APK-37
    or
    2*7.62mm PV-1
    2*g20mm ShVAK
    Bombs 4 racks D-1
    Modified January 27, 1998
    by Alexandre Savine
    and Sergey Andreev;
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