Quote:
Originally Posted by Crumpp
The change jumps right out at you. Go compare the operating limits page I posted from June 1940 with the page from January 1942.
You should see it plain as day. If you don't I will point it out to you later.
Why do you think they republished the Operating notes in January 1942? The Spitfire Mk I was not the latest Spitfire Mark at that time. However, 100 Octane was common by that date and required a republication of the notes.
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So even with 100 octane fuel being the common fuel in January 1942, the "All out" limit remained +6 1/4. So obviously there is no relation between introduction of 100 octane fuel and the fact that the "All out" limit remained +6 1/4.
Fact is that the June 1940 manual already included all information needed by the pilot for the use of 100 octane and +12 boost:
- The use of 87 octane and 100 octane fuel is allowed (see Section 1 "Fuel", I will provide the page later)
- The boost-control cut-out allows to obtain +12 boost
- The use of the boost-control cut-out is allowed in emergency cases for short periods and when 100 octane is used
The fact that the January 1942 manual introduces an additional limitation of the fuel for operational and training units doesn't outweigh the fact that there not a single line in the June 1940 manual that would prevent the use of 100 octane fuel of whole Fighter Command in June 1940.
It doesn't proof that they did, but it doesn't proof that they didn't - which is your claim.