Engine power curves.

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Another goldmine Thanks.

Never knew that 1st Hercules (at least II and IV) engines have had single speed superchargers?
 
Awesome Neil. Many thanks.

That Exe sure was a go-er! 1160hp @ 1,000ft, 4200rpm at take-off power. And only 4.5psi boost!
And 1100hp @ 5,0000ft and 950hp @ 15,000ft, 3800rpm

Vulture RV.2SM: 2000hp @ 5,000ft, 3000rpm, +9.25psi boost MS gear, 1860hp @ 14,500ft, 3000rp, +9.25psi boost.
Max take-off power, 2100hp @ sea level, 3000rpm, +11.5psi boost.

Not too many aero engines at that time had the combination of power and compactness that the Vulture did. Pity about the reliability.

Dagger VIII: 1000hp @ 8,750ft, 4200rpm, +5psi boost max. But the other curve on the graph shows 1115hp @ 7,250ft, 4400rpm and +7psi boost.


Not sure I follow the RPM-power graphs. The curves don't finish up at the max power point.
 
Thanks a lot, Neil!
Excellent material!
I'm specially thankful for the Cheetah (Anson), Aquila (Venom) and Mercury VII (FiAF Fokker D.XXI) graphs.

Juha
 
Very good share! I am curious, it seems early Merlin engine develops less power at higher RPM (if I read graph right) - why is that anyone know?
 

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