Virgil N. Salisbury wrote:

The Prince "Ptip" put an end plate at the tip of the prop, Virg

Paul Lamar replied:

Yes they do but apparently it is a wash as they don't appear
to be overwhelmingly superior. Perhaps the additional intersection,
surface area and form drag out weighs the reduction in tip vortex.

Q tips are similar and they have been around for years on certified
airplanes.

I wonder what the research on forward-swept prop blades says.  (A
forward swept blade would counteract the span-wise flow along the prop
major axis.)  You'd for sure need to use carbon fiber for stiffness with
a forward-swept blade.

Russell

I would love to see a CFD on a prop if that was possible.

Paul Lamar

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