The Letov Š-1 was a Czechoslovak single-engined, two-seat biplane surveillance aircraft. It was the first military aircraft built in Czechoslovakia. It was designed by Alois Šmolík at Letov Kbely. The Š-1 first flew in 1920.
Variants
SH-1
127kW (170hp)Hiero L engines. Later redesignated Š-1. 28 built.
SM-1
194kW (260hp)Maybach Mb.IVa engines. Later redesignated Š-2. 64 built.
Sm A 1
Commercial variant. Canopy over rear cockpit for two passengers.