Anyone used a Warp Drive prop?

[chris mitchell]

I think you are asking about Aeroelastic propellers which was the subject of an article in the UK "Flyer" magazine in April. The two companies the article mentions are:

DUC-Helices in France who make the "Swirl" propeller - http://www.duc-helices.com/technique/swirl.htm

Elprop

But I think both only manufacture for Rotax type engines. Neat idea tho'!!

Chris

[cwreeves]

Originally Posted by az_gila

Paul... it's been around for ages as the Warnke "Almost Constant Speed Prop", using the flexibility of many laminations of wood and a curved blade shape.

Steve Barnard's RV-6A that was tested by the CAFE folks in 1993 had one installed....

http://cafefoundation.org/v2/pdf_apr...inal%20APR.pdf

I believe the Warnke props are still being made, but their web site seems flakey.... I also bet few of the newer RVs are using wood props any more...

gil in Tucson - original location of the Warnke props...

Actually, Bernie's former son-in-law, Clark Lydick is building a Warnke clone. Clark builds beautiful 2 and 3 propellers. I've been using one of his 2 blade props on my KR-2 for 5 years and it is much smoother and performs better than any plank prop I'm familar with i.e. Sterba, Culver, Sensenich. Clark's props are typically 1/16" laminations and a work of art. If anyone is interested they can reach Clark at: http//perfprops.spaces.live.com/ or 520-394-2059. With Clark's props the old saying "You get what you pay for " applies.
Charlie, RV-7, Tucson