[Franek Grabowski]

Kari, to supercharge translates as nadduv. Forsirovannyj stands for extended performance (tuned up?).

Evgenij, access to data is one thing, but I like the way he uses it. He clearly shows logical steps in development based on operational experience, for example. Concerning supercharging, the point is that most of engines have single staged centrifugal supercharger, and those destined for high altitude operation have either multi-staged mechanical driven superchargers or turbo-compressors. AM-38 should have a single staged centrifugal supercharger and I believe it is placed at the back of the engine.