La-7 vs ??? (attn Franek)

[Jukka Juutinen]

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 Raunio´s 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 Pilot´s 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-7´s air cooled engine screws it for it has some 30% greater sfc at max continuous power than the DB 605.