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Letov S-428

Letov S.428

Letov S-428

Powered by an Avia VR-36 V-12 liquid-cooled inline piston engine of 740 hp, the Letov S-428 was a close support version of the Letov S-328. Only one prototype was built.

Letov S-328

Slovak Letov S.328

Letov S-328

Initially developed for a Finnish requirement for a two seat biplane reconnaissance, the Letov S-28 first flew in 1929. Although not taken up by the Finish Air Force, Czechoslovakia bought 12 production Letov S-128s. These were followed by 4 S-228s for Estonia which were delivered in 1932. Production then shifted to the main S-328 version. A total of 470 of all versions were built.

Following the Sudetenland Crisis and the splitting of Czechoslovakia, the new state of Slovakia inherited a large number of S-328s while Germany took control of the rest. Some of these and new built machines were sold to Bulgaria.

More details of each countries use of the Letov S-328 and photos can be found in the links below.

Photographs of scale models of the Letov S-328 can be found here.

Variants

Letov S-528

Letov S.528

Letov S-528

Planned as a replacement for the successful Letov S-328, the S-528 was a reconnaissance and light bomber aircraft. The structure of the S-328 was strengthened and the powerplant was upgraded to a 800 hp (597 kW) Gnome-Rhône Mistral Major. Due to the German annexation of Czechoslovakia, only six were built.