Acceleration comparisons

[gaunt1]

Originally Posted by FC99

Ps=(VT-VD)/W [m/s]
VT(La5FN) > VT(La5F)  -  more powerful engine -> more thrust
DT(La5FN) < DT(La5F)  -  cleaner airframe -> less drag
W(La5FN) < W(La5F)    -  La5FN is lighter 


Ps=dEh/dt
Eh=h+V^2/2g [m]   - Energy height

From that you can calculate acceleration.

All of the above combine = big difference in performance
When you know specific excess power, you can calculate climb and acceleration performance. Or you can go backward and measure acceleration(Like horseback is doing) and calculate Ps and rate of climb from it.

Dont know... Still fishy for me. La-5FN is only 150hp more powerful, but according to NII VVS tests, it is actually heavier (60-100kg) than La-5F. I strongly suspect that ingame FM is based on the performance of the prototype SN 39210102. If you look at horseback's chart, the performance of the FN is suspiciously better than the F. It should be of course better than the F, but not that much, maybe only 15-20%.