wmaxt
Staff Sergeant
One thing about the Merlin in the US durring the war. It took an average of 320hrs to overhaul and 198 average to overhaul an Allison. I don't know for sure but this might illistrate the complexity/precision required for the Merlin engines. That would make the Merlin more dependant of careful assembly and would result in a wider variation in power output possible between engines.
wmaxt
wmaxt