"Karin Conover-Lewis" wrote in
:

Dunno that it's what the poster was asking about. The Walker Wingsail
is pretty much a vertical airplane wing with an "elevator" trailing it
on a boom. I don't think anyone would describe it as a "cylinder." I
seem to recall a cylindrical turbine being used experimentally,
driving a propeller.


True, Walker made several versions however, some earlier versions looked
cylindrical with a trim tab. A Wingsail equiped tri was a feature of
several UK TV programs during the eighties in which they emphasised the low
height of the rig and the fact that it was 'driven' like a car, wheel and a
foot pedal for power., even to the extent of sialing backward and forward
to 'parallel park' against a dock. Shame it didn't take off.