I wouldn't call that an engine or mechanical propulsion any more than I would a
person with a set of oars, or a horse hauling a buggy a motor vehicle.

I wonder if a sail shouldn't be consider "mechanical" propulsion though. =|:-)
The mast and rigging are could be consider parts of a "machine" as well as the
sail. A vessel under sail is certainly not human powered. Not sure how you'd
rate the horsepower!!!!!

On Sat, 14 Feb 2004 12:37:16 -0500, Jean Dufour
wrote:

While having your canoe towed by a swimming dog is clearly not mechanical propulsion
what if you have her running in a wheel and the motion of that wheel is transfered
thru a contraption to turn a propeller?

It's clear to me you have an engine aboard but not a motor. :-)