Acceleration comparisons

[gaunt1]

According to that formula, La-5FN acceleration is 55.555...% better than La-5F. I think 15-20, maybe even 30% would be acceptable for a meager 150hp more powerful engine + a tiny little less drag (but 60-100kg higher weight). If you check NII VVS tests, you can see maximum 20-25% improvement in other performance charts, (speed, climb, turn time) nowhere near the 55%. Obviously prototype performance. If you still think this isnt suspicious...