General Information
Type La-5FN Model 1944
Function Fighter prototype
Year 1944
Crew 1
Powerplant
Type Shvetsov ASh-82FN
Power at 0m 1,850hp
Power at 4,650m 1,460hp
Size
Length 8.60m
Height 2.80m
Wingspan 9.80m
Wing area 17.59m2
Weights and loads
Empty 2,605kg
Takeoff 3,265kg
Wing Load (kg/m2) 186
Power load (kg/hp) 2.24
Speed
at 0m 597km/h
at 6,000m 680km/h
Maneuverability
Turn time ?sec
Roll
Landing ?m
Takeoff ?m
Range
Practical ?km
Flight endurance 1.0h
Ceiling
Ceiling 10,750m
Climb
5,000m 4.45min
Payload
Fuel and oil 326kg
Armament
Gun Type 3*20mm Berezin B-20
Position engine cowling
Ammo 150rpg
Salvo (kg/sec) 3.84

La-5FN Model 1944 fighter prototype by S.A. Lavochkin

47k b/w photo of La-5FN Model 1944 from Squadron/Signal No. 169 "La-5/7 Fighters in Action" by Hans-Heiri Stapfer, p.33.

The La-5 '206' prototype was a project run by the scientists at the Central Aero- and Hydrodynamics Institute ( TsAGI) with the goal of improving the aerodynamics of the La-5FN. But they paid no attention to the feasibility of incorporating the changes into production fighters. This portion of the work was taken over by the Lavochkin OKB at GAZ-21 at Gorkij. During January 1944 there was completed a single prototype incorporating nearly all the aerodynamic changes recommended by TsAGI plus some more improvements made by the Lavochkin team. This aircraft was initially designated the La-5FN Model 1944 and was to become the pattern aircraft for the La-7.

The modifications incorporated in this aircraft were as follows:

25k b/w drawing of La-5FN Model 1944 from Squadron/Signal No. 169 "La-5/7 Fighters in Action" by Hans-Heiri Stapfer, p.33.

Flight testing of this aircraft took place at the NII VVS from February to March 1944 by test pilot A. Kubyshkin and leading engineer V. Alekseyenko. After this date further testing was suspended owing to two engine failures with broken connecting rods and torn-off fuselage skin. Kubyshkin made only nine flights, but this was enough to prove the qualities of the aircraft. It was about 50-60km/h faster than the standard La-5FN and almost completely met the government's requirements for an aircraft of this type. With the exception of the B-20 guns (not yet fully developed at that time) all of its innovations had to be incorporated in the following series-built aircraft, finally emerging as the La-7.

PredecessorsModifications

La-5 '206'

La-7

References
  • "Soviet Combat Aircraft of the Second World War" by Ye. Gordon and D. Khazanov; Vol.1 p.53-54
  • Squadron/Signal No.169 "La-5/7 Fighters in Action" by Hans-Heiri Stapfer; p.33
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  • Created for RAM November 11, 2000
    by Thomas Heinz
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