Ta-152c

[*Buzzsaw*]

Originally Posted by Brain32

If that is from the same book I think it is, you will also notice that was only emergency period during V1 threat and that after that due to numerous problems they reverted back to 9lbs until ofcourse they got IIb engine upgrades which allowed 11lbs without use of 150 grade fuel...

Completely false.

If you look at this .pdf of a RAF report on the use of 150 grade fuel:

http://www.spitfireperformance.com/1.../appendixa.pdf

...you will see that the performance of the Tempests using 150 grade fuel and +11 boost was deemed:

"...very successful" No sign of the "...numerous problems..." Brain claims.