Design all-metal. The sizes of an airplane small, wing area only 15,0 м2, it of a thin section, with special aerodynamic
I-250 combined powerplant consisted of VK-107A engine rated at 1650 hp and VRDK booster developed in TSIAM under K.V.Kholshchevnikov. Power produced by piston engine supplied propeller and VRDK compressor. During take-off and in flight with VRDK off, power was used mainly by propeller; VRDK compressor was rotating at the lowest gear ratio. In order to reduce take-off run and attain maximum speed, the second, highest gear ratio was selected and combustion chamber has been supplied by fuel. The combustion chamber - about family by injectors behind a cabin, output gas nozzle - with adjustable lateral doors. The common power of a piston engine and VDRK was 2800 h.p. at the altitude 7000 m at speed of 820 kms / ч. Three-blade AV-10P-60 propeller, 3.1 m in diameter, was used on the aircraft.
Armament consisted of three B-20, 20 mm-cal. cannon (100 shells for each cannon). One cannon shot through a hollow gear shaft; two synchronous cannon were mounted at the fuselage sides.
Unlike prototypes I-250, MiG-13's fuel reserve loaded to four wing tanks was increased by 190 kg. The range without actuation VDRK on speed of 600 kms /hч has increased up to 1818 km.
|Type||I-250 (N)||MiG-13 (N)|
|Function||Fighter fitted out with combined powerplant|
|First flight||March 3, 1945|
|Dimensions & Weight|
|Overall height, m||3,7|
|Wing Span, m||9,5||9,5|
|Wing Area, m2||15||15|
Take-off weight, kg
|Empty weight, kg||2797 (2935)||3028|
|Weight, kg||fuel||430||590 (570)|
|Specific wing load, kg/sq.m.||245||262|
|Engines||Piston VK-107A with VDRK booster|
|at altitude 3800 m||1450|
|with VDRK H=7 km V=820 kh/h||2800|
|Trust VDRK, kgf||600|
|Specific power load, kg/h.p.||2,23||2,38|
|Max. speed, км/ч||at altitude 7,8 км||825|
|at ground level||670 (project)|
|Landing speed, km/h||150|
|Range at altitude, km||1380 (project)||1818|
|Time to climb 5000 m, min||4,6|
|Practical ceiling, m||11900|
|Cannon||3х 20 mm B-20|
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