109 e3b against spitfire II

[Seadog]

Originally Posted by Crumpp

Seadog,

18 May 1940 is only 6 weeks from the start of the Battle of Britain.

The language in that primary source document refers to "certain units" and not "ALL" units.

Very importance difference.

The German Army defeated France in 6 weeks...6 weeks is a long time.

RAFFC had many units which did not require 100 octane, such as OTU and a few squadrons of Gladiators. In any event, again all the evidence points to RAFFC operational Merlin engined squadrons using 100% 100 octane. There isn't a single source that states that an operational Merlin engined fighter squadron was using anything else.