Quote:
Originally Posted by Crumpp
If you look at Banks chart, you will see that Merlin XX is a ~625 hp at 4 1/2 lbs at sea level on a standard day.
|
I don't think you are reading the chart correctly. If you following and extending the line of +4.5 boost to sea level the rpm is decreasing at the same time which gives lower bhp.
However I've found a better source for the power of Merlin XX. It has a max. economic cruise rating of +4 boost and 2,650 rpm which gives 800bhp at sea level and 900bhp at FTH MS gear. Reference:
http://www.wwiiaircraftperformance.o...x-curve-c1.jpg
So even if we assume that the Merlin III and XX are comparable (I wouldn't do it, to much guesswork in it but anyway ...) this would give for the Merlin III between 800 and 900bhp (which is achieved at lower boost but slightly higher rpm) from sea level to FTH, which is supported by the 830bhp (which is achieved at lower boost and lower rpm, so actual power is higher) given by lane.
BTW: The Maximum cruising rating is +7 boost and 2,650 rpm which gives 1000bhp at sea level and over 1100 at FTH MS gear.