Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Mráz M.1 Sokol was a light aircraft built in Czechoslovakia in the years following the end of the Second World War. Designed in secret by Zden¿k Rubli¿ at the Benes-Mráz factory during the German occupation, the type was put into production in 1946. The Sokol was a conventional, low-wing monoplane that took the pre- war Benes-Mráz Bibi as its starting point. Two seats were provided side-by-side in an enclosed cabin, and the main units of the tailwheel undercarriage were retractable. Construction throughout was of wood.