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Most recent edit:
Tuesday April 16, 2013
- Co-founder of airbeams
The use of inflated sails for ship propulsion.
Elevated sails or (kites) have been used by a number of proponents of this
technique on vessels ranging from outright speed vessels to commercial
displacement vessels, mainly as research projects.
The purpose of this paper is to discuss the author's practical experience
gathered over the last 9 years and then to detail some of the possibilities
that are being created by new materials and heat sealing technology that he is
presently applying to both elevated and non elevated inflated sails. Included
are wing sails and vertical sails (which do not necessarily need masts) and
can be warped to achieve the desired direction of travel, as well as inflated
magnus effect rotors.
- (Stewkie Aerodynamics Limited).
Available online 27 February 2003
Elevated sails or (kites)
- Catalyst and leader in power kiting sports
http://www.ayrs.org/Index08.html Chapter 8) Kites - hapas,
gliders, tethered rigs
- Catalyst - Journal of yacht research
- Early European kiteskiers were Keith Stewart and Theo
Schmidt (AWEIA member. http://www.dcss.org/speedsl/ST89refs.html
) , who also was among the first to waterski with
kites. American Cory Roeseler together with his father William developed a
Kiteski system for waterskiing and began winning in windsurf races featuring
high following winds, such as in the gorge of the Columbia river.
Riding the Wind With a history way back in antiquity, the kite today is
finding more applications than ever. These developments are largely due to
scientific design. by Nick Laurie, editor of European Kiteflier and
secretary of the European Kiteflier's Association. in New Scientist,
page 922f, 28 September 1978. Mention of Keith's crossing of the
English Channel by kite power was briefed. A technical note on Cody's
tactic of rings and cones is included. "Keith
Stewart crossed the English Channel last year on a 10-foot catamaran towed
entirely by kite power. The journey took him a little over four hours that
time, but he is talking now of a 20 000-square-foot kite which may
significantly reduce the journey time! These kites are delta shaped with two
lines which can be used to steer the kite over a 150°
arc thus enabling them to seek out the most suitable breeze for any course at
- Dave Culp: "Way
back in January, 1978, I met a British kite manufacturer, Keith Stewart, at a
trade show. Keith was selling big
150-300 square foot delta kites with inflatable leading edge tubes, for
pulling three wheeled trikes over beaches and marshes. I looked through his
exhibit and something clicked. Here was my inclined rig, available right off
the shelf! I'd take Keith's kites, my boat and controls, and "look out world!"
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