These graphs only show performance from 2000/3000m and up, whereas the previous graphs showed performance from 0m and up.

It's very interesting to note that between 3000 and 5000m, the patched 109E4 performs better than RL, whereas both the Rotol Hurri and the MkIa Spitfire perform worse than RL at these altitudes.

Please can we see graphs for the Spits and Hurris from 0m and up, so we can make a true comparison?

Many Thanks.

Yes

Thank You Blacksix... oh and by the way, I felt the same as you about Diablo III ;)

We don't have official flight tests for Spits and Hurris between 0 and 3000m.

OMG! Everything is monitored and translated?))

Yes... well all those cold war spies need to do something now ;)

Im flying the Spit 1a very often in this period and, if i well understand the graph, i never was able to reach 310 mph=500 kmh in level flight. At most i can reach 260 mph. Probably im making something wrong.

Thanks, Black Six. At last we finally know why the Spitfire Ia's top speed at sea level is 240 mph. The slope of the curve was simply applied to the 0 - 3000 m gap in information, so 0 feet = 240 mph. Mystery solved.

https://docs.google.com/spreadsheet/...x=40gk54utfx7r

I've read the values from the various charts by a ruler. Note that I only used the values at altitude 0, 1000, 2000, ..., 10000 (1000 m step)

This chart gives speed down to 0 feet. I think it's calculated as the test log only goes down to 3000 m.