Thought people might find this of interest.
A DIY, fully configurable, polytarp wing sail.
Old memories of this web-site were stirred by a posting in another forum.
http://windmek.ca/wingsail/index.html
This bloke has been refining his design for several years - now up to revision 6.
Thought about knocking one up for Teal at about revision 2 but felt the batten
construction at that stage was beyond me :C (cast your own variable-flex in
epoxy & glass rovings) This latest version of batten looks eminently do-able.
It is a complex beast, but dirt-cheap for what it theoretically might do (thrash the
pants off a Storer OzPDR !!) :U
cheers
AJ