Krichyevskii BOK-2
The BOK-2 was an aerodynamic research aircraft designed by S. S. Krichyevskii and built in the USSR in.Development
The BOK-2 was a research aircraft fitted with a slotted wing, which comprised the main forward part and the large variable incidence rear section with a slot between them. This small wooden single seater powered by an M-11 engine was flown successfully in but was abandoned, whilst in the process of being modified to allow the aerofoil, and slotted section, to automatically adopt the most efficient profile, when S. S. Krichyevskii died suddenly late in 1935.
