Quote:
Originally Posted by TomcatViP
You shld write comics. You will hve an huge success.
It has been alrdy explained and can be found in many documents.
I myself illustrated this meaning right her ein this thread by linking to a 1954 FLIGHT articles detailing the evolution of teh Merlin eng during the war with details of wich octane was used. 
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As I pointed out also previously in this thread, that article only comments on normal pre-war octane use (1937) not octane use during the war