At 12:23 AM -0800 1/18/02, Matt Broze wrote: > >This is from memory, but it is my understanding that the range between a >speed/length ratio of 1.5 to (something like) 2.5 (or was it 2.25) is >considered the semi-planing range and that true planing is only happening at >speeds above that. Fast ships such as Naval Destroyers operate in this >range. So a kayak with a 16 foot waterline (and a planing hull) wouldn't be >fully planing until its speed was up to 9 or 10 knots. Even Greg Barton >can't do this speed in a sea kayak (but I've seen him do almost 7.9 knots in >a 19' 8" long Seda Glider). I think it is considered to be true planing when >the bow comes back down in relation to the stern and the boat is approaching >a more level orientation again after have climbed out of its own hole in the >water against the force of gravity (?using a moving inclined plane?). This shows the problem with the definition of "planing" everyone has a different one. However, by this definition I think some surfing kayaks plane. I've measured ground speeds of over 20 mph while surfing and at the point of acceleration, the bow tends to drop down the wave and the boat takes off. Some of that speed was probably due to the water on the wave moving, but it was a non-breaking wave so I don't think the water was moving very fast. -- Nick Schade Guillemot Kayaks 824 Thompson St Glastonbury, CT 06033 (860) 659-8847 *************************************************************************** PaddleWise Paddling Mailing List - Any opinions or suggestions expressed here are solely those of the writer(s). You must assume the entire responsibility for reliance upon them. All postings copyright the author. Submissions: PaddleWise_at_PaddleWise.net Subscriptions: PaddleWise-request_at_PaddleWise.net Website: http://www.paddlewise.net/ ***************************************************************************Received on Fri Jan 18 2002 - 06:55:06 PST
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