Thanks again Cyrus.
I think the pointer towards old NACA reports looks like the better option. To be honest, I hadn't realized that such reports were available, so now the search begins...
Scott Eberhardt did some work on this subject which intrigued me, and released a PDF titled...
I'm interested in calculating the flight performance of World War One aircraft.
The aerofoils can give me the coefficient of lift, we have the engine horsepower and the maximum level speeds. Wingloading can generate the stall speeds.
How do I calculate the minimum horse power required for...