In article ,
Fly wrote:

Was there ever a prop modified with a trailing edge bump for the purpose of
increasing MP at the ram air inlet?

Faint memory is maybe Lopresti marketed a Hartzerll with a trailing edge
tab.

I think Lopresti makes one for the Comanche or Twin Comanche. It might
"come with" a cowling.

--
Ben Jackson

http://www.ben.com/