In 2008 I got to Hawaii without an engine. A Navik windvane drove for about 4 days, during an awful lot of gray skies as Sleddog will remember. I actually engaged one of the ST2000's for some extremely light air hours. I still recall my dismay one early morning, at discovering the boat careening hither, thither and yon, even though the Navik was still engaged. I pulled up the oar only to discover that the bottom 2/3rds of the fiberglass foil had busted clean off, rendering the unit essentially useless. From then on it was ST2000's.
I had a small gasoline generator on board. It ran for about 20 minutes and died. I spent an entire day trying to entice it to start again.... no deal. So it was solar panels and nothing else for the last 12 days. Now, I have to admit that I wasn't very competitive!
BTW, my first outboard motor, on my Cal 20 was a Seagull. Man, that thing stank.
1968 Selmer Series 9 B-flat and A clarinets
1962 Buesher "Aristocrat" tenor saxophone
Piper One Design 24, Hull #35; "Alpha"