[Juha]

Hello Tony
I’d say that the situation isn’t so impossible. If you cannot lay your hand on Soviet operational studies or if you cannot read Russian, read several German memoirs of men who fought on both fronts in 43-45, after all the men in receiving end had the best knowledge on the effects of CAS. There are also a few good books on Il-2 in English and also a must is "Red star against the swastika" by Vasily B. Emelianenko, very good memoirs of an highly decorated Il-2 pilot.

Juha