Quote:
Originally Posted by Seadog
The Merlin XX played only a small part in the BofB, but it was approved for 12lb boost during emergencies in Nov 1940:
and, since 12lb boost was available during TO right from its introduction, any pilot, at his discretion could use 12lb boost at any time or any altitude where it was possible, and there was no physical lockouts in the cockpit engine management system to prevent a pilot from doing this. |
Hmmm, it comes to mind that the publication date of 20 March 1940 for
A.P. 1590B/J.2-W, Merlin II and III – Use of + 12 lb./sq.in. Boost Pressure followed actual unit conversion to 100 octane/+12 in the field in some cases; see for example
602 Squadron Operations Record Book,
151 Squadron Operations Record Book,
111 Squadron Operations Record Book &
74 Squadron Operations Record Book - Fwiw.