real P-39 vs ingame p-39

[pandacat]

Hey horseback. Very good analysis. Btw, when you mentioned touchiness and tendency to enter flat spin, it kinda reminds me of our ingame p51s. Oh, btw, remember a while ago, you did a post on acceleration comparison? The other day, I was surfing a website call WWII aircraft performance. One of the manuals on f4f mentioned that in order to attain the same lvl of power at high alt, one needs use a lower rpm setting. The military power at low to medium requires 2500rpm, but at higher alt, the requirement drops down to 2250rpm. That kinda rang a bell when I recalled what you said about P51 getting more acceleration at 2700rpm at higher alt when speed is above 310mph. Sounds like in thinner air, you need heavier bites from the prop to get similar thrust?