The reshaping shown is very similar to a current trend in wing tip

shaping

in which the trailing edge is longer than the leading edge. The approach
is to reduce tip vortice losses, and is probably equally applicable to
props. The reduction in noise would seem to be an indicator of some
improvement. As an interesting aside, the Sensenich metal prop for RV's
for the O-360 is a reverse of this - tho the prototype was the long
trailing edge - they maintain there is no difference? (tooling
mistake?) - Vance

Vance,
If you cut through a section of an airfoil at an angle you get a longer
sleeker airfoil - the way in which the air sees an swept back wing airfoil
which is much more efficient in higher speeds.
Similar properties do you think, in relation to drag as the prop approaches
the speed of sound.
George ( down under)

Thanks all for your comments on this.  I guess my main concern in regards to the Warp Drive I have is the size of the prop tip.  In my case, it's about .18" thick and 1.25" wide with a curved rear edge.  The back edge of the curve is flat, so I can see tapering there would definately help, but to fix it, I'll probably have to shorten the prop by about .5", then add the angle.  So I'm wondering, anybody think it might be worth the effort?

If I do shorten the prop to make the mod, I'll have to make sure the blades are balanced, but how close in weight is close enough?

Thanks

Grant

A lot depends on the configuration of the engine, the aircraft speed, type of airplane
and the phase of the moon. I would fly it like it is before I made any modification.
Then perhaps the data can point you in the right modification direction.

Paul Lamar
 
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