One of the recommendations from the government testing of Lavochkin La-130 (Lavochkin La-9 prototype) was to further develop it into a long-range escort fighter. The resultant La-134 prototype (also sometimes referred to as La-9M) featured increased fuel and oil capacity. Armament was reduced to three cannons. The prototype flew in May 1947. The second prototype, La-134D had fuel capacity increased by an additional 275 l (73 US gal) with wing and external fuel tanks. The aircraft was fitted with larger tires to accommodate the increased weight and amenities for long flights such as increased padding in the seat, armrests, and a urinal. In addition, a full radio navigation suite was installed. Not surprisingly, combat performance with a full fuel load suffered. However, as the fuel load approached that of La-9, so did the performance. The aircraft was found to be poorly suited for combat above 7,000 m (23,000 ft). The new fighter designated La-11 entered production in 1947. By the end of production in 1951, a total of 1,182 aircraft were built.
A handful of La-11 remain in museums in China, Korea.
- Length - 8625 mm
- Wingspan - 9800 mm
- Height - 3560 mm
- Weight - 3996 kg
- Speed max. - 674 km/h
- Range - 2235 km
- Rate of climb - 758 m/min.
- Ceiling - 10250 m
- Engine - АSh-82FN
- Armament - 3 х 23 mm guns NS-23