In 1947, a Letov design team, led by Ing. Pracharem and Ing. Záhorou, began work on a new, single-engined jet fighter. Their Letov L-52 design would be derived from the twin-jet Avia S-92 (Me-262A-1a), re-using some of that Messerschmitt design's components.A single British jet engine would be housed in a near circular-section fuselage with an oval nose intake. This fuselage would break behind the low-set wings to facilitate engine changes and maintenance. Front-line fighters would be fitted with the 5,000 lb st (22.3 kN) Rolls-Royce Nene. The tandem-seat fighter-trainers would retain the less powerful Derwent V.
Development of the project (and its advanced version designated L-152) stopped after communists had seized power in Czechoslovakia in February 1948.