[utu]

Originally Posted by *Buzzsaw*

Thanks to Mike Williams for his links from his Spitfire site:

http://www.spitfireperformance.com/spittest.html

Very interesting, thank you.
Here is stated that the use of 100 octane fuel came at the end of february 1940.
http://www.spitfireperformance.com/spit1vrs109e.html
Anyway the Spit in Cod is not working probperly because at 10000ft it starts the engine stutters, but this should be its best performance altitude.