Like a traditional parachute it spills water to keep the maximum drag. To
over simplify it, if the water builds up inside a dome of higher pressure
builds up across the leading edges and the flow becomes more like dragging a
ball than a cone. It will start wobbling and loose drag.

--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com

wrote in message
oups.com...
What is it good for? Retrieval?