[TomcatViP]

Originally Posted by Seadog

The Merlin XX was given official approval to use 12lb boost for combat in MS gear in Nov 1940, but the engine was cleared for 12lb boost/3000rpm for TO right from the beginning, and so was available to any pilot who cared to use it during combat.
http://www.wwiiaircraftperformance.o...s-10june40.jpg
http://www.wwiiaircraftperformance.o...xx-15nov40.jpg

Approval for 14 and then 16lb boost was added later, along with the appropriate boost override modifications.

T.O low speed no ram effect + Optimum Air flow in term of Mass of air to cool the supercharger (see above what two speed use is abt)

@VO101_Tom : Nice found but I am sry this argument is not valid. Any Army makes the circulation of Info a strategical issue : you are flying in a fighter -> you get all the info cleared for your security level regarding that type of fighter.

It does not mean that they all hve used the famous 100oct

But As I hve alry said : let's give them their Barracuda engines that years of stupid mods can get a justification (and spare my own free time)

@Kurf : this is a neat explanation with proof reasoning. I hve read it the first time you put it on the forum and still wait for any argumentation since