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Lavochkin Lagg-3




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.

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 Slat s 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 disappointing, 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 , '''G'''orbunov , and '''G'''oudkov ) "LaGG" stood for '''''la'''kirovanny '''g'''arantirovanny '''g'''rob'' ("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 .


Operators

  • Soviet Union, Finland (captured examples only)



SPECIFICATIONS (LAGG-3 SERIES 66)

  plane Or Copter plane
  jet Or Prop prop
  crew One
  length Main 881 m
  length Alt 28 ft 10 in
  span Main 980 m
  span Alt 32 ft 1 in
  height Main 440 m
  height Alt 14 ft 5 in
  area Main 175 m&2
  area Alt 188 ft&2
  empty Weight Main 2,205 kg
  empty Weight Alt 4,851 lb
  loaded Weight Main 2,620 kg
  loaded Weight Alt 5,764 lb
  max Takeoff Weight Main 3,190 kg
  max Takeoff Weight Alt 7,018 lb
  engine (prop) Klimov M-105 PF
  type Of Prop liquid-cooled V-12
  number Of Props 1
  power Main 924 kW
  power Alt 1,240 hp
  max Speed Main 591 km/h
  max Speed Alt 369 mph
  range Main 650 km
  range Alt 405 mi
  ceiling Main 9,600 m
  ceiling Alt 31,500 ft
  climb Rate Main 149 m/s
  climb Rate Alt 2,926 ft/min
  loading Main 150 kg/m&2
  loading Alt 31 lb/ft&2
  power/mass Main 350 W/kg
  power/mass Alt 021 hp/lb




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