Lavochkin-Gorbunov-Goudkov LaGG-3
From Wikipedia, the free encyclopedia
| LaGG-3 | |
|---|---|
 |
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| A Series 35 LaGG-3. | |
| Type | fighter |
| Manufacturer | Lavochkin-Gorbunov-Goudkov |
| Maiden flight | March 30, 1939 |
| Introduced | late 1941 |
| Primary user | Soviet Union |
| Produced | 1941-1942 |
| Number built | 6,258 |
| Variants | Lavochkin La-5 Lavochkin La-7 |
The Lavochkin-Gorbunov-Goudkov LaGG-3 (Лавочкин-Горбунов-Гудков ЛаГГ-3) was a Soviet fighter aircraft of World War II. It was a refinement of the earlier LaGG-1, and was one of the most modern aircraft available to the Soviet Air Force at the time of Germany's invasion in 1941.
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[edit] Development
The main deficiency of the LaGG-1 design was power. A more powerful version of its Klimov M-105 engine was tried. The improvement was poor and without an alternative powerplant, the only solution was to lighten the airframe. The LaGG team re-examined the design and pared down the structure as much as possible. Fixed slats were added to the wings to improve climb and manoeuvrability and further weight was saved by installing lighter armament. The LaGG-3 replaced the LaGG-1 immediately.
The result was still not good enough although it came close to its rival Bf-109F in performance and was superior in maneuverability, as even with the lighter airframe and supercharged engine, the LaGG-3 was underpowered and proved immensely unpopular with pilots. The novel, wood-laminate construction of the aircraft continued to be poor quality (as with its predecessor) and pilots joked that rather than being an acronym of the designers' names (Lavochkin, Gorbunov, and Goudkov) "LaGG" stood for lakirovanny garantirovanny grob ("guaranteed varnished coffin" - лакированный гарантированный гроб). Some aircraft supplied to the front line were up to 40 km/h (25 mph) slower than they should have been and some were not airworthy. In combat, LaGG-3's main advantage was its strong airframe. Although the laminated wood did not burn it shattered severely when hit by high explosive rounds.
The LaGG-3 was improved during production, resulting in 66 minor variants in the 6,258 that were built. Experiments with fitting a large radial engine to the LaGG-3 airframe finally solved the power problem, and led to the superb Lavochkin La-5.
[edit] Operators
- Soviet Union
- Finland
- Finnish Air Force (captured examples only).
[edit] Specifications (LaGG-3 series 66)
Data from Jane’s Fighting Aircraft of World War II[1]
General characteristics
- Crew: One
- Length: 8.81 m (28 ft 11 in)
- Wingspan: 9.80 m (32 ft 1.75 in)
- Height: 2.54 m (8 ft 4 in)
- Wing area: 17.4 m² (188 ft²)
- Empty weight: 2,205 kg (4,851 lb)
- Loaded weight: 2,620 kg (5,764 lb)
- Max takeoff weight: 3,190 kg (7,018 lb)
- Powerplant: 1× Klimov M-105PF liquid-cooled V-12, 924 kW (1,260 hp)
Performance
- Maximum speed: 575 km/h (357 mph)
- Range: 1000 km (621 mi)
- Service ceiling: 9,700 m (31,825 ft)
- Rate of climb: 14.9 m/s (2,926 ft/min)
- Wing loading: 150 kg/m² (31 lb/ft²)
- Power/mass: 350 W/kg (0.21 hp/lb)
Armament
- 2× 12.7 mm (0.50 in) Berezin BS machine guns
- 1× 20 mm ShVAK cannon
- 6× RS-82 or RS-132 rockets up a total of 200kg (441 lb)
[edit] References
- ^ Bridgman, Leonard, ed. “The LaGG-3.” Jane’s Fighting Aircraft of World War II. London: Studio, 1946. 194-195. ISBN 1-85170-493-0.
[edit] Related content
Related development
Comparable aircraft
Designation sequence
LaGG-1 - LaGG-3 - La-5 - La-7 - La-9
