| Although, by early 1944, the VP programme was of little
more than academic interest, work continued on two
further "A" series prototypes, the I-224 and I-225,
which had been assigned the Izdeliye designations 4A
and 5A respectively. The I-225 was destined to enter
flight test three months before the I-224, the first of two
prototypes flying on 21 July 1944. This was powered by a Mikulin AM-42B 12-cylinder liquid-cooled Vee engine
equipped with a TK-300B turbo-supercharger on its
starboard side and affording 2000hp for take-off and
1750hp at 7500m. Featuring a much improved
Shchyerbakov pressure cabin, a 64mm
armour-glass windscreen, 8mm seat armour and an
armament of four synchronised 20mm ShVAK cannon,
the I-225 was of all-metal construction and was flown
for the first time on 21 July 1944. On 2 August, the I-225
attained 707km/h at 8500m, but,
two days later, during its fifteenth flight, the engine of
the I-225 seized at an altitude of 15m and the aircraft
crashed and proved irreparable. The second prototype
was not flown until 14 March 1945 as the OKB
was devoting priority to the I-250. During subsequent
testing, the I-225-02, which was powered by an
AM-42FB engine with similar ratings to the AM-42B,
attained 726km/h which, at the time, was
believed to be the highest speed attained by a Soviet
piston-engined fighter. This distinction had been
gained, however, by the M-108-powered Yak-3M.
 | A three-view drawing (1663 x 1273) |
WEIGHTS |
Take-off weight | 3900 kg | 8598 lb |
Empty weight | 3010 kg | 6636 lb |
DIMENSIONS |
Wingspan | 11.00 m | 36 ft 1 in |
Length | 9.60 m | 32 ft 6 in |
Height | 3.70 m | 12 ft 2 in |
Wing area | 20.38 m2 | 219.37 sq ft |
PERFORMANCE |
Max. speed | 726 km/h | 451 mph |
Ceiling | 12600 m | 41350 ft |
Range | 1300 km | 808 miles |
Focault, e-mail, 01.01.2025 06:50 Its Crazyyy reply | Karl Marx, e-mail, 15.12.2023 02:52 my baby made this in his sleep reply | mefestopheles, e-mail, 13.08.2023 18:18 any combat info on this aircraft reply | Jeffrey Epstein, e-mail, 10.04.2021 04:50 do you have any extras? reply |
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