FW-190A8 NM at 10 K = 1.2926E+10
FW-190A8 NM at 20K = 25852821750
Spitfire Mk IX Merlin 66 NM at 10K = 1.0157E+10
Spitfire Mk IX Merlin 66 NM at 20K = 20313000000
Spitfire Mk IX Merlin 66
Wing area S (sq. feet)- 242
Airplane weight, lbs (as tested) - 7400
Wing span, ft - 36.1
Step B - performance #s at a known altitude
Altitude (feet) - 13800
Maximum speed (at test alt.- mph) - 389
Engine Horsepower (bhp at test alt) - 1650
Stall speed (mph, at test alt) - 90
Horsepower rating is at +19.5 max boost @ 3000 rpm at 13,800ft AGL.
FW-190A8 BMW-801D2
Wing area S (sq. feet) - 196.98
Airplane weight, lbs (as tested) - 9418
Wing span, ft - 34.45
Step B - performance #s at a known altitude
Altitude (feet) - 17224
Maximum speed (at test alt.- mph) - 408
Engine Horsepower (bhp at test alt) - 1680
Stall speed (mph, at test alt) - 110
Horsepower rating is at 1.58ata/1.65ata @ 2700U/min
Comparison under same conditions @ 300mph IAS.
Spitfire Mk IX CL=0.196312 D(p)=706.7709 D(i)=97.17467 CD(tot)=0.02132 Drag (tot)=803.94557
FW-190A8 CL= 0.343145 D(p)=595.7239 D(i)=197.875
CD(tot)=0.028915 Drag (tot)=793.59888
thrust (lb) T-D
Spitfire Mk IX 1544.397 740.451
FW-190A8 1550.793 757.1939
Conclusions -
Under 1G the FW-190A8 and the Merlin 66 Spitfire are very similar in total drag. The faster the speed the more the FW 190 moves to advantage. The slower the speed the more the Spitfire moves to advantage.
The FW-190A8 always has much more inertia and potential energy to convert to Altitude or Speed. It also has less braking forces per mass applied to it.
David Lednicers data reflects this conclusion. The FW-190 has less parasitic drag than the Spitfire but produces more induced drag.
The data used for each was:
Spitfire:
Perfomance numbers:
http://www.fourthfightergroup.com/eagles/jl165.htmlhttp://www.fourthfightergroup.com/eagles/jl165speed.gifDimensional data is out of:
"British Warplanes of WWII" Edited by Daniel J. March.
Horsepower data was extrapolated using:
http://www.fourthfightergroup.com/eagles/merlin66hpchart.jpgFocke-Wulf 190A8
Performance numbers:
http://www.terra.es/personal2/matias.s/fw190-1.jpgDimensional data is out of:
Flugzeug-Handbuch D(Luft) 2190 A-7 bis A-9 March 1944.
Horsepower data for the BMW-801D2 @ 1.65ata comes from a mechanical engineering anaylsis of the BMW-801D2 motor performance based on the following NACA Bench test analysis:
http://www.terra.es/personal2/matias.s/bmw801d-1024.jpgI will gladly share the analysis results with anyone.
Special thanks to Angus and Nashwan.
Crumpp