Hi,
Some information about Letov's pre-war aircraft. Unrealized studies and types about which there is no information are marked in bold.
Chief designer Alois Šmolík (1893-1952) after the occupation of Czechoslovakia in 1939 was forced by the new German leadership to resign. At the end of November 1943, he left Letov permanently and moved to the small town of Příbram, where he devoted himself fully to the management of his engineering plant and foundry, which he inherited. He never returned to work in the aviation field...
Letov Š.A, Š.1. Prototype and 28 serial aircraft for MNO.
Letov Š.137. A seven-engine transatlantic transport aircraft for 50 passengers. Total engine power 2,400 hp, aircraft weight 22,000 kg, cruising speed 200 km / h, study 1920.
Letov Š.2. Model No. 1 built under license from the company Aero in the number of 40 pieces 1921.
Letov Š-B-1, Š.3. Experimental upper wing. 1 prototype 1921.
Letov Š-HS-1.01, Š.4. Prototype and 20 serial machines 1921.
Letov Š.5. Test reconnaissance aircraft, identical in shape to Š.1. 1st prototype 1923.
Letov Š.6. Bomber. Prototype and aircraft series of 35 aircraft 1923.
Letov Š 7. Experimental fighter aircraft. 1 ptotoyp 1923.
Letov Š.8. Racing topplane. 1 prototype 1923.
Letov Š.9. Three-engine bomber with a tandem landing gear in large gondolas under the wings. One 450 hp engine and two 240 hp engines, 1923 study.
Letov Š.10. School plane built 36 pieces, a copy of the Brandenburg B-1 1923.
Letov Š.11. A twin-engine bomber with two Walter engines of 220 hp, study 1923.
Letov Š.12. Upper plane, whose thick wing of great depth was mounted on the fuselage W.4. 1 prototype 1923.
Letov Š.13. Biplane with a thick profile of new semi-self-supporting wings mounted on the fuselage W.7. 1 prototype 1923.
Letov Š.14. Installation of the Hispano Suiza 8Fb engine by 300 hp into the airframe Š.4.20. 1 prototype 1923.
Letov Š.? 15. Light experimental sports aircraft with a Walter engine with a power of 30k. Mr. Šmolík returned to this project in 1931 with project Š.39, study.
Letov Š.16. Bomber and reconnaissance aircraft with an all-metal skeleton, built 125 pieces in 1925.
Letov Š.116. Bomber and reconnaissance aircraft, built 3 prototypes 1928.
Letov Š.216. Bomber and reconnaissance aircraft, built 1 prototype 1928.
Letov Š.316. Bomber and reconnaissance aircraft, built 3 prototypes 1928.
Letov Š.416. Bomber and reconnaissance aircraft, built 1 prototype 1929.
Letov Š.516. Bomber and reconnaissance aircraft, built 2 prototypes of 1930.
Letov Š.616. Bomber and reconnaissance aircraft, built 12 pieces in 1931.
Letov Š.716. Bomber and reconnaissance aircraft, built 1 prototype 1930.
Letov Š.816. Bomber and reconnaissance aircraft, built 2 prototypes of 1931.
Letov Š.17. Bomber and reconnaissance aircraft, built one prototype, BD-500 engine, based on type Š.16 1928.
Letov Š.18. School plane, made a series of 34 pieces 1924.
Letov Š.118. School plane, made a series of 14 pieces 1925.
Letov Š.218. School plane, built 34 pieces 1928.
Letov Š.19. Transport aircraft, during the construction of the building units of the aircraft Š.6, 7 pieces were assembled for ČSA 1924.
Letov Š.20. Fighter, built a series of 114 pieces in 1924.
Letov Š.21. Training fighter, built 2 prototypes 1925.
Letov Š.22. Fighter high-altitude aircraft, built 1 prototype, Škoda L engine, 450 to 1925.
Letov Š.23. Bittner collection, study.
Letov Š.24. Night bomber modified from Š.16, study 1927.
Letov Š.25. School continuation aircraft, built 3 prototypes 1928.
Letov Š.26. Bittner collection, study.
Letov Š.27. Three-engine airliner, Walter Jupiter engines, 18 passengers, study 1928.
Letov Š.27. School continuation aircraft, construction of 2 pieces canceled in advanced condition, 1931.
Letov Š.28. Observation and light reconnaissance aircraft, built 1 prototype 1928.
Letov Š.128. Observation aircraft, Walter Jupiter engine, built 19 pieces of 1930.
Letov Š.228. Observation aircraft, built 5 pieces, 1931.
Letov Š.328. Observation aircraft, built 412 pieces, 1932.
Letov Š.428. Observation aircraft, built one prototype, 1929.
Letov Š.528. Observation aircraft, built 7 pieces, 1935.
Letov Š.29. Four-engine bomber, study 1929.
Letov Š.30. Transport four-engine aircraft, Walter Jupiter engines, 18 passengers, study 1928.
Letov Š.31. Fighter, made 22 pieces 1929.
Letov Š.131. Fighter, made 2 prototypes, 1929.
Letov Š.231. Fighter, made 24 pieces, 1931.
Letov Š.331. Fighter, built 1 prototype, 1935.
Letov Š.441. Fighter, made 1 prototype, 1936.
Letov Š.32. Transport aircraft, originally single-engine, designed as a three-engine, built 5 pieces in 1929.
Letov Š.33. Single-engine bomber, built 1 prototype 1929.
Letov Š.34a three-engine biplane, bomber, span 32 m, study from the late twenties.
Letov Š.34b, single-engine three-seater bomber, evolution of the type Š.33, study, early 1930s.
Letov Š.35. No information.
Letov Š.36. Project I, II, Bittner collection.
Letov Š.37. No information.
Letov Š.38. No information.
Letov Š.39. Sports high-altitude aircraft, built 21 pieces, 1931.
Letov Š. 139. Sports aircraft, built 5 pieces, 1933.
Letov Š. 239. Sports aircraft, built 16 pieces, 1935.
Letov Š.40, Š.40a, projects I, Š.40, Š.40b projects II. Airliners, Bittner Collection, study 1934.
Letov Š.41 project I, Š.41, Š.41a, Š.41b, Š41c projects II. Airliners, Bittner Collection, study 1934.
Letov Š.42. Twin-engine bomber biplane, derived from the transport Š.40, made a model for tests in the wind tunnel, Bittner collection, study 1935.
Letov Š.43. Twin-engine bomber, competitive design with type Aero A-300 and Avia B-158, expected speed 435km / h, study 1936.
Letov Š.44a, Š.44b. Light fighter, model made for wind tunnel tests, expected speed 518km / h, Bittner collection, study 1936.
Letov Š.45. No information.
Letov Š.46. No information.
Letov Š.47. No information.
Letov Š.48. Twin-engine bomber, Bittner collection, study 1936.
Letov Š.49. Twin - engine heavy fighter and combat aircraft, study, Bittner collection, study 1936.
Letov Š.50. Twin-engine light bomber, completed 1 prototype out of 2 ordered,
Letov Š.50. Bittner Collection, Project I, II, III, 1936.
Letov Š.50D. Transport twin-engine aircraft, derived from Š.50, Bittner collection, study 1938.
Letov Š.51. Fighter, Bittner collection, project I, II, study 1938.
Letov Š.52. Twin-engine training aircraft, designed for training pilots of multi-engine aircraft, derived from Š.50, study 1938.
Letov Š.53. No information.
Letov Š.54. No information.
Letov Š.55. No information.
Letov Š.56. Twin-engine two-seater fighter, shell construction of the wings and fuselage as in Š.50, study 1938.
Letov Š.57. Connecting aircraft, study 1938.