Thanks Orazio & Armorman, for your appreciation!
To set the record straight, the museum showing the aerobatic aircraft BA 122 is the Letecke Museum, Kbely
And the engine is not the 100-110 hp Shvetsov M-11, but Avia Rk-17
, delivering no less than 430 hp.
Small wonder that it would need a really effective air-pushing devise up front!
For looking at all the sometimes beautifully restored aircraft in the museum, use the link supplied above