Spit IIa is now so much more inferior to the 109

[Kwiatek]

Generally max climing settings could be used for level flight much more safetly beacuse there is better airflow by radiators which casue better cooling engine condition then in steady climb at the same engine settings. So if engine have 1/2 hour limit for max climbing settings it could be used even more safetly for level flight. The one thing which is imprortant here is just fuel usage. Just all.