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

[NZtyphoon]

Crumppquote: you will not see technical orders that are applicable to operational units that do not make it into the new edition.

Wrong - as long as the engine was originally designed and rated for 87 Octane fuel the Pilot's Notes did not incorporate anything else until 1943. Any amendments to the engine's ratings continued to be issued as supplementary slips.

The Pilot's Notes General 2nd ed printed in April 1943 dropped the convention because most engines which were originally designed to use 87 octane fuel were well out of frontline service.