Inaccurate performance data for BOB fighters in COD comparing to RL data

[Crumpp]

Here's the page from the "June, 1940" Pilot's Notes that specifies the fuel (which actually is from "May, 1940" as can be seen in the "List of Content" of Section 1).

"100 octane may be used, if the engine has been suitable modified", if it wouldn't be possible it would state "must be used".

Of course and this is same note appears in the 1939 Operating Notes.

The fly in the ointment is the January 1942 Operating Notes clearly state, OPERATIONAL UNITS-100 OCTANE ONLY.

January 1942, Pilots Operating Notes, Spitfire Mk I:



That is definative and it is a fact all operational units flying a Spitfire are using 100 Octane in January 1942.

Before the January notes, the only mention of 100 Octane is "100 octane may be used, if the engine has been suitable modified" That "may be used....IF" is definative as well. All operational units flying a Spitfire Mk I were not using 100 Octane in June of 1940...for a fact.