Lavochkin La-7 (late)
| GENERAL DATA | |||
| Other Designation(s) | - |
||
| Type | Fighter |
Crew | 1 |
| Manufacturer(s) | Plant No.21 (Gorky),
Plant No.381 (Moscow), Plant No.99 (Ulan-Ude) |
||
| Production | 5753 (all models) + 584 trainers
(May 1944 - August 1946) |
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| First Flight | 1 February 1944 (La-5 mod. 1944) |
Introduction | June 1944 |
| Variants | |||
| La-7TK | One aircraft used to evaluate the TK-3 turbosupercharger in July 1944 in the hopes of improving high-altitude performance. | ||
| La-7R | Testbed for a tail-mounted liquid-fuelled RD-1KhZ rocket engine. The rocket was rated at 300 kg of thrust and its fuel (90 l) of kerosene and 180 l of red fuming nitric acid, was expected to last between three and three and a half minutes. | ||
| La-7PVRD | Testbed for two underwing ramjet engines. The aircraft
was expected to reach a speed of 800 km/h at a height of 6000 m, but
could not exceed 670 km/h due to the high drag of the ramjets. |
||
| La-7/M-71 | One aircraft was fitted with the Shvetsov M-71 for trials in 1944. However the engine was not yet ready for service and the program was cancelled.[ | ||
| La-7UTI | 2-seat trainer version. Armament reduced to a single 20 mm gun. Fitted with a radio compass and gun camera. Considerably heavier than the fighter at 3500 kg, but it retained the flying characteristics of the single-seat aircraft. 584 built, the last two delivered in 1947. | ||
| DIMENSIONS | |||
| Length | 8.6 m |
Empty Weight | 2638 kg |
| Wingspan | 9.8 m |
Loaded Weight | 3315 kg |
| Height | 2.54 m |
Max takeoff weight | ? kg |
| Wing area | 17.59 m² |
Wing Loading | 188 kg/m² |
| ARMAMENT | |||
| Main Guns | 2 × 20 mm ShVAK cannons (*)
or 3 × 20 mm Berezin B-20 cannons (*) |
Ammunition Carried | 2 x 200
or 3 x 100 |
| Secondary Guns | - |
Ammunition Carried | - |
| Other Armament | 2 × 150 kg bombs, 158 kg bombs
or 8 x 82 mm rockets, 82 mm RS 82 rockets or 2 x PTAB anti-tank
weapons |
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(*) cowl-mounted
| POWERPLANT | |||
| Engine | 1 × Shvetsov ASh-82FN |
Type & Displacement | 14-cylinder two-row radial, Air
, 41.21 L |
| Horsepower (maximum) | 1850
hp |
Power/Weight Ratio | 558.1 hp / ton * |
| Fuel Capacity | 462 L (Internal)
for La-5 / for La-7 fuel, capacity was cut in half to reduce weight.
|
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(*) with Loaded weight
| PERFORMANCES | |||
| Maximum Speed | 661 km/h
at 6000m |
Cruise Speed | ? km/h |
| Stall Speed * | 120 km/h |
Service Ceiling | 10450 m |
| Rate of Climb | 15.7 m/s |
Range | 665 km (1944 Model) |
(*) vitesse de décrochage
| Sources | |||
| Wikipédia | - |
- | - |
Drawings |
