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Kari, La-7 did not have two stage compressor (supercharger). I think you mixing two speed and two stage superchargers. I guess too many Squadron/Signals! They usually make awful mistakes on this.
According to Jukka Raunioīs Lagg-3 article in Ilmailu 11/1990, it had NACA 23016 at root and 23009 at tip.
Yes, that aileron stalling is really that flicking out of the turn. That Yak-3 Pilotīs Notes really indicate bad stall, harsh and without warning.
Your endurance figures are also begging additional explanations. For example, you write that the 109 had the same endurance (45-60 min) as the La-7. Well, true only if flying at the 30 minute rating (the maximum available in Finnish G-2s and probably G-6s as well). If flown at Dauersparleistung, over 90 minutes and if flown for max endurance, probably around 3 hours or more. Here La-7īs air cooled engine screws it for it has some 30% greater sfc at max continuous power than the DB 605.
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"No man, no problem." Josef Stalin possibly said...:-)
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