Derek,
Sorry for the delay. Real life keeps getting in the way.
I have two photos, one each of P-40K and P-40N and they are from the same angle.
I need to scan them and then superimpose the images to see the difference in detail.
Give me a few more days....
Thanks Vince, that would be great
Based on dimensions taken from a full size propeller, I have drawn a picture of it which looks very symmetrical, but I take it that this is actually a true plan based on dimensions alone (no allowence for blade twist). Your photographs will help me determine how close my initial blade shape is to the real thing. I shall be starting to shape a plastic blank into a blade very soon.
Thanks
Derek