On Fri, 3 Aug 2007 17:39:13 +0200, "Marc" wrote:

I have the experience that
if you have any type of schedule (even allowing ample spare time) you just
need to motor from time to time.

Absolutely right.

You can reduce prop drag to almost zero by using a folding or
feathering prop.

http://www.gori-propeller.dk/

http://www.martec-props.com/

http://www.spw-gmbh.de/eng/index.html

http://www.flexofold.dk/

http://www.autoprop.com/