Spit IIa is now so much more inferior to the 109

[Kwiatek]

Originally Posted by Flanker35M

S!

But I see the problem right there. Now people look at that graph and see thick blue line faster than Bf109E. But forget to check a "minor" thing..it is with 12lbs boost not the lower continuous power. And on that the Spitfire is slower than Bf109E. And it seems, according to that graph, that Spitfire and Bf109E were quite evenly matched regarding speed on power settings below WEP or overboost. But again can not stress enough that should not take the 12lbs curve as the absolute speed of Spitfire as it could not run that setting indefinitely but for a limited time like Bf109E it's WEP.

Flanker you should notice that speed curves for 109 are for 5-minutes emergency power not for nominal power. So it should be checked speed at 1.23 Ata for 109 (30-minut power) vs 6 1/2 lbs for Spitfire - both continous power.

We should note that power settings for 109 E was ( Db 601A/Db601Aa):

1.4/1.45 Ata - 1 minut take off emergency power
1.3/1.35 Ata - 5 minut emergency power
1.23/1.27 Ata - 30 minut continous power

For Spitfire we have:
12lbs - 5 minutes emergency power
6 1/2 lbs - 30 minutes continous power

The problem is beside that Spitfire MK II dont have emergency +12 lbs at low level that its engine is very ofen broken without seriously reason. Yestarday i flew SPit MK II at 6 1/2 lbs and reduced RPMs for 2800 RPMs radiator open (temps normal) and after some time flying ( ab. 10-15 min) my engine broken. Flying at + 9 lbs broke engine much more faster.

Other hand if i not execed 2400 RPMs in 109 i could fly at 1.35 Ata power all time without any problems - when it should be only 5 minut emergency power.