Where was the power from? If I recall correctly, on Lancasters the #3 engine supplied the power (hydraulics I think, but maybe electric) for the turrets.
On the Mosquito Mk XVI one of the engines (I don't recall which) provided the cabin pressurization.
Correct. Lancs were #3. I don't believe the two examples are accurate, nor consistent with every type. Certainly, Spits and Hurricanes could not charge their guns the same way a P-51 could, or F4U.
And to add a reply to Arlo: The entire "add Oxygen" item is an overreaction and as I already said, an attempt to force players to fly only along certain lines.
You and the likes of you demanded changes be made to cause people to fight, to "force them to fight" if you will. Then you got hordes as a result. This wish is just as stupid.