Direct into wind sailing craft
More than 10 years ago in the early 1990s a page was published describing a wind-driven boat, little more than a toy, that could progress directly into the wind that powered it.
There was considerable interest in this and after experimentation I was able to produce this updated version called "Windspinner".
Construction notes and comments.
The windrotor blades are made
from thin balsawood, flat with no airfoil.
Of vital importance is the
angle the windrotor blades are set into the hub.
Photos of "Windspinner" prototype.
Large prop is suitable for light winds, smaller one is for stronger winds.
Update: April 2010
Someone suggested that to make things easier,
you could used "pop" bottles for the floats.