MiG-13/I-250/N A.I.Mikoyan/M.I.Gurevich

(B/W, 41k) From Ned Avejic collection;
32k b/w from "History of aircraft construction in the USSR" by V.B.Shavrov, Vol.1 p.240;

A
small all-metal mixed-power fighter with a piston engine in the nose and a VRDK 'booster' in the tail. VRDK was basically a jet engine with a compressor driven by the Klimov engine. It had variable exhaust nozzle. Joined power of both engines was up to 2800hp (at 7000m).
It was very well armed - 3 B-20 cannons provided salvo of 3.84kg/sec. One of cannons was installed to fire through the spinner, two others - on the engine sides, synchronized.
First flight was performed on March 3, 1945. In March-May I-250 passed first test program.
50 (or less than 20?) built, and in service until 1950 with USSR Navy (Baltic and Polar fleet);
More pictures...
25k B/W photo and 20k B/W drawing (by I.G.Soultanov) at "History of aircraft construction in the USSR" by V.B.Shavrov, Vol.1 p.240

References:
  • "History of aircraft construction in the USSR" by V.B.Shavrov, Vol.1 p.241;
    More Links :
  • MiG-13 at 'Novik'
  • I-250(N) at Virtual Aircraft Museum
  • MiG-13 at The Jet Genesis
  • MiG-13, Mikoyan-Gurevich
  • I-250(N), Mikoyan-Gurevich
  • Technical data
    Type /I-250/N MiG-13/N
    Function fighter
    Year 1945 1947
    Crew 11
    Engines 1*1500/1650hp Klimov VK-107A(R?)
    1*300kg Khalshchevnikov VRDK
    Length 8.18m 8.20m
    Wing Span 9.5m 9.5m
    Wing Area 15.0m2 15.0m2
    Empty Weight 2935kg3028kg
    Loaded Weight 3680kg3931kg
    Wing load 245kg/m2 262kg/m2
    Power load 2.23kg/hp 2.38kg/hp
    Speed at 0m 670km/h ?
    Speed at 7800m 825km/h ?
    Speed without VRDK ? 600km/h
    Climb to 5000m 4.6min ?
    Ceiling 11900m ?
    Range 1380km 1818km
    Armament
    Guns 3*20mm B-20
    Modified October 14, 1997
    by Alexandre Savine;
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