Speed graphs for Spitfire and Hurricane

[fruitbat]

@Kurfurst, still waiting for your proof that all MKII's were limited to 9lbs from my post earlier,

Originally Posted by Kurfürst

. The Spit II I am afraid is correct, the type was limited to +9 lbs during the BoB, even with 100 octane

I am genuinely intrigued by this, and not messing around, on what is that based?

I've seen this obviously, dated july 1940



and as Crump has pointed out in the other thread that all Spit MkII's were using 100 octane fuel in June 1940.

So what have you got that proves they were only on 9Lbs boost during BoB?

[Kurfürst]

Originally Posted by fruitbat

@Kurfurst, still waiting for your proof that all MKII's were limited to 9lbs from my post earlier,

I am genuinely intrigued by this, and not messing around, on what is that based?

I have posted this paper (and of course I got it from someone else). But others (I think 41 Banks) have pointed out that this page was amended, given the amendment no, likely in 1941 IIRC. So in short the +12 limit only appears in later manuals, but the 1940 ones.

The unamended (likely first or early) version from July 1940 shows the limit as +9 for 5 min Combat (+12 is enabled, but only for take off for a limited time/altitude).