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

[Crumpp]

"This initial increase in maximum boost from 6 lb to 9 lb delivered a useful power growth of around 130hp at the rated altitude". This just doesn’t make sense when all the documentation available shows an increase in maximum boost from +6.25 to +12 with the Merlin III.

If you read in the July 1940 POH for the Spitfire II, it clearly lists 100 Octane as the fuel and that +12lbs is a Take Off rating and +9lbs is an Emergency rating limited for 5 minutes.