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LaGG-3

Fighter

Lavochkin, Gorbunov, Gudkov

LaGG-3, Crimea, 1942

LaGG-3, Crimea, 1942.

The fighter LaGG-3 was designed under the direction of a triumvirate of designers: Lavochkin, Gorbunov and Gudkov. The prototype of it named I-301, has left on tests in March, 1940, i.e. soon after I-26 of Alexander Jakovlev.

Distinctive feature of design I-301 was broad application of the wood having the big strength. Metal was used only there where simply it was impossible to do without it (a steel monoframe, cowlings of a motor). Such approach to designing was compelled - manufacture of aluminium was insufficient. Other distinctive feature I-301 consist in unusually high-power arms - a gun of 23 mm and two synchronous large-caliber machine guns BS and additional to two ShKAS.

I-301 has passed tests as a whole successfully. However the high-power arms and the big reserve of fuel for range of 1000 kms have made an airplane too heavy. Powers of a motor appeared insufficient.

It is the most successful LaGG-3 acted against bombers of the opponent where its superiority in flight performances and a power of arms was main. But pilots on LaGG-3 had to conduct air fights and with fighters. On the main flight performances LaGG-3 conceded Messerschmitt Bf-109E and Bf-109F.

Under management Gorbunov in 1942-1943 have conducted activities on increase of fighting capacity LaGG-3. On a fighter have put more high-power motor M-105PF, have facilitated a plane, have removed a part of armament, have reduced a reserve of fuel and have improved aerodynamics. In result under main flight performances LaGG-3 it was practically equal to the Yak-1.

A total of 6,5281 aircraft were built during 1941-1944.

WW 2 Beginning Soviet Fighters
Yak-1 Yak-1 Yak-7b MiG-3 LaGG-3 LaGG-3
Year of issue 1941 1943 1943 1941 1941 1943
Dimensions
Length, m 8.48 8.48 8.48 8.25 8.81 8.81
Wing span, m 10.0 10.0 10.0 10.2 9.81 9.81
Wing area, m2 17.15 17.15 17.15 17.44 17.62 17.62
Weight, kg:
Maximum takeoff weight 2858 2884 3005 3300 3280 2990
Powerplant
Engine M-105P M-105PF M-105PF AM-35A M-105P M-105PF
Power, h.p. 1100 1210 1210 1350 1100 1210
Performance
Maximum speed, km/h at sea level 480 501 531 472 474 542
at altitude 577 592 588 622 549 591
m 4950 4100 3860 7800 5000 3560
Time to 5000 m, min 9.2 6.2 6.6 5.7 7.4 5.8
Service Ceiling, m 10000 12500 10200 11500 9300 9500
Service Range*, km 700 625 600 630 700 650
Armament
Number Cannon 1 1 1 - 1 1
Machine guns 2 1 2 3 3 1

* Forcing of the engine during 10 minutes.

** On speed making 90 % from maximal.

References

  • "The history of designs of planes in USSR 1938-1950" /Vadim Shavrov/
  • "Planes of Stalin falcons" /Konstantin Kosminkov and Dmitriy Grinyuk/
  • "The Soviet planes" /Alexander Yakovlev/

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