"Joe" wrote in message
ps.com...


I think you may be overlooking the dhow with it's lateen rigs from
some 2000 years ago.

The ones sailing the Nile?


Yes, just like the Egyptian gliders of the time:

http://www.catchpenny.org/model.html

http://www.huge-entity.com/2005/10/a...g-machine.html

The development of the glider lead to sailboats sailing into the wind.

Crickey!