With the primary objective of improving the aerodynamics
of the basic MiG-3 design, the OKB began
work late in 1941 on an enhanced version of the fighter to which it gave the Izdeliye designation of D. Known
officially as the I-230, and later as the MiG-3U - the suffix
letter signifying uluchshenyi (improved) - the new
fighter was first flown in August 1942. Whereas the
fuselage of the MiG-3 was primarily of steel tube with
duralumin skinning, that of the I-230 was almost entirely
of wood owing to the contemporary metal shortages.
By comparison with the MiG-3, the fuselage was
lengthened by 37cm, but the Mikulin
AM-35A engine was retained and the wing of the first
prototype was unchanged, armament consisting of two
20mm SP-20 (ShVAK) cannon mounted above the
engine. The second prototype differed in having a
larger wing of 18.00m2 area and spanning
11.00m. Performance proved good during
factory and state trials, but it was not possible to reinstate
production of the AM-35A and production of the
I-230 was therefore restricted to a pre-series of five aircraft
which were assigned to a Guards Regiment (1
GvIAP) on the Kalinin front for service evaluation.
| Take-off weight||3285 kg||7242 lb|
| Empty weight||2612 kg||5759 lb|
| Wingspan||10.20 m||33 ft 6 in|
| Length||8.62 m||28 ft 3 in|
| Wing area||17.44 m2||187.72 sq ft|
| Max. speed||660 km/h||410 mph|
| Range||1350 km||839 miles|
" the armament comprised two 20 mm ShVAK guns with 150 rounds each, placed over the nose and synchronized; they could fire separately or together."
- Thus says the internet concerning the MiG-3U. Many other improvements were made, like lengthening the fighter for enhanced handling, and raising the cockpit and pilot for better view to name just a couple more.
|william cahill, 21.12.2009|
I am in the process of putting together an
R/C model of this plane but having a hard time finding information on gun placement. Can you help? Thanks - William.
|sıtkı özcan, 26.10.2009|
Do you have any comments about this aircraft ?