One of the recommendations from the government testing of Lavochkin La-130 was to further develop it into a long-range escort fighter. The resultant La-134 prototype featured increased fuel and oil capacity. Armament was reduced to three 23mm 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 w