Here's a simpler NASA design:
http://antwrp.gsfc.nasa.gov/apod/ap000526.html


Simon de Vet wrote:
> Anyone have steering ideas?

Offhand:  Make the sail in three pie-sectors.  Rotate the whole,
slowly.  Retract the sail on the side toward which you want to turn.


-- 
Anton Sherwood  --  br0### [at] p0b0xcom  --  http://ogre.nu/

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