Cost of fuel...

[Dave R]

Originally Posted by NH.Solar

Here is a recent prop innovation that may help to stretch the ol' fuel economy, Sharrow propellers.
Strangest looking prop I've ever seen but who is to say that mobius strip blades won't work? I find this prop absolutely fascinating and apparently so does the commercial marine world. Stay tuned...

Those are really cool and do seem to work as advertised, based on two articles I have read. They sure are proud of them though; yikes, the prices are eye-watering!