
Originally Posted by
GrubbyFingers
Hi Mprim,
I was refering to the actual shape of the blade. Regardless of whether the blade is upper or lower, it will have an identical outline. Your lower blade is still a different shape to the upper one. (I am assuming it is a two-bladed prop. This all goes out the window for a three-blader)
I've done a quickie to show what I mean. I have taken the outline of the upper blade and used that to create a new lower blade. They are now the same shape. The shading then tells you whether you are looking at the face or the back of the blade.
Graeme.