For those who would like to go further into the weeds on stalled propeller blades, here is research on the wood propeller for the WWII Spitfire.

 

Note that only half power could be used during part of the take off run, as the blades would stall otherwise.

 

Note also that the thicker Clark "Y" was better than the thin bladed metal prop of the time.

 

The Clark "Y" ??? Have we nothing better in 60 years? There is much work to do on propeller design. About 80% left to discover...........

 

Lynn E. Hanover