That is the one Terry.
The LWD Szpak 4A
Szpak-4A was designed as an aerobatics plane. Only one prototype was built, flown on May 20, 1947. It had a steel fuselage frame rather than a wooden one, and a two-men side-by-side open cab. It was not certified as an aerobatics plane however, and was used by the factory as a utility plane in 1947–1948.
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