Lavochkin La-126

Lavochkin La-126 was a World War II Soviet prototype piston-engined fighter aircraft.

Development

Despite its superb performance, Lavochkin La-7 fighter had a major drawback -- much of its airframe was made of wood. In addition to being heavier than metal, the wooden structure was prone to rotting and warping when exposed to the elements, which at times led to nasty surprises during flight and could ground entire squadrons. The solution was to create an all-metal airframe. Meanwhile, in 1944 a La-7 was successfully tested with Nudelman-Suranov NS-23 23 mm cannons. At the same time, TsAGI was testing a La-7L with a new laminar flow wing. Finally, another La-7 was tested with the new Shvetsov ASh-83 motor. While only slightly more powerful than Shvetsov ASh-82FN, ASh-83 had much better performance at high altitude. All of these developments were combined in the new La-120 prototype with mostly metal construction, NS-23 cannons, a laminar flow wing, and the ASh-83 engine. Flight testing began in January 1945 with the aircraft reaching a top speed of 735 km/h (457 mph). However, the ASh-83 engine proved unreliable and La-120 development was stopped after two prototypes.

The La-120 design directly evolved into La-126. The aircraft was equipped with the proven ASh-82FN engine and the laminar flow wing was perfected, eliminating the need for leading-edge slats. This was a welcome change as the slats on La-7 had a tendency for unsynchronized deployment with a serious impact on aircraft handling. Flight testing of La-126 was completed by 1946 with somewhat disappointing results. While the armament of four 23 mm NS-23 cannons represented a leap over La-7 with three 20 mm Berezin B-20 (projectile mass from a one-second burst had increased from 3.1 kg (6.8 lb) on La-7 to 6 kg (13.2 lb) on La-126), there was no significant improvement in performance. As the result, La-126 never advanced beyond the prototype stage. The concept of an all-metal La-7 was finally realized with Lavochkin La-9.

pecifications (La-126)

aircraft specifications

plane or copter?=plane
jet or prop?=prop
crew=One
length main=8.63 m
length alt=28 ft 4 in
span main=9.80 m
span alt=32 ft 2 in
height main=3.56 m
height alt=11 ft 8 in
area main=17.6 m²
area alt=189 ft²
empty weight main=2,579 kg
empty weight alt=5,686 lb
loaded weight main=3,315 kg
loaded weight alt=7,308 lb
max takeoff weight main=
max takeoff weight alt=
engine (prop)=Shvetsov ASh-82FN
type of prop=air-cooled radial engine with a two-stage supercharger and fuel injection
number of props=1
power main=1,380 kW
power alt=1,850 hp
max speed main=690 km/h
max speed alt=430 mph
max speed more=at altitude
range main=700 km
range alt=435 mi
ceiling main=10,800 m
ceiling alt=35,400 ft
climb rate main=17.8 m/s
climb rate alt=3,510 ft/min
loading main=188 kg/m²
loading alt=39 lb/ft²
power/mass main=0.42 kW/kg
power/mass alt=0.25 hp/lb
armament=
* 4x 23 mm Nudelman-Suranov NS-23 cannons, 50 rounds/gun

References

;Notes;Biblliography
* Gordon, Yefim. "Lavochkin's Piston-Engined Fighters (Red Star Volume 10)". Earl Shilton, Leicester, UK: Midland Publishing Ltd., 2003. ISBN 1-85780-151-2.
* Kopenhagen, W (ed.), "Das große Flugzeug-Typenbuch" (in German). Transpress, 1987, ISBN 3-344-00162-0

ee also

aircontent

sequence=
* La-120 - La-126 - La-130 - La-132 - La-134

related=
* Lavochkin La-9
* Lavochkin La-130

similar aircraft=
* Focke-Wulf Fw 190

lists=

see also=