The subject of 'prior knowledge' (spontoons) rises and interesting question over the statement by Kajak Sport - http://www.kajaksport.com http://www.kajaksport.com/englanti/perasinlaitteet.html Their statment is - ~~~~~~~~~~ KS Navigator rudder System The Navigator Rudder system is so unique and innovative that it is patented. It is ultra light, elegantly designed minimal moving parts, trouble free and easy to use even in difficult conditions. ~~~~~~~~~~ Their 'innovative' rudder system has been in production by 2 firms in New Zealand for about 10 years. A third company built one and gave up on it and the original designer used his for a while. His dates back to about 1989. So it is not just the "inflated air bag man" patenting old ideas. BTW the web site shows the rudder being retracted and one great advantage of the stowage system is that the pull-up string locks the rudder in the stowed position and there is no need to try and centralise the rudder during retraction. Alex . . Alex (Sandy) Ferguson Chemistry Department University of Canterbury New Zealand *************************************************************************** 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/ ***************************************************************************
On Tue, 2002-11-12 at 11:23, Alex Ferguson wrote: > The subject of 'prior knowledge' (spontoons) rises and interesting question > over the statement by Kajak Sport - > > http://www.kajaksport.com > > http://www.kajaksport.com/englanti/perasinlaitteet.html > > Their statment is - > ~~~~~~~~~~ > KS Navigator rudder System > The Navigator Rudder system is so unique and innovative that it is > patented. It is ultra light, elegantly designed minimal moving parts, > trouble free and easy to use even in difficult conditions. > ~~~~~~~~~~ I have not used a boat with a rudder for many years but TK1s and Surf skis had rudders that tilted years ago although not stowed. I believe that there use was banned on surf skisas they could do unique damage to a mans nether reaches if he was assisting someone launching there ski regards Peter *************************************************************************** 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/ ***************************************************************************
>TK1s and Surf skis had rudders that tilted years ago although not stowed. >I believe that their use was banned on surf skis as they could do unique >damage to a mans nether reaches if he was assisting someone launching >their ski. I thought all surf skis had their rudders fixed (non retracting) and mounted under the hull about 1/2 to1 metre from the stern. I've never seen a surf ski with a stern mounted rudder. Alex . . *************************************************************************** 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/ ***************************************************************************
On Wed, 13 Nov 2002 10:55:53 +1300, "Alex Ferguson" <a.ferguson_at_chem.canterbury.ac.nz> said: > > I thought all surf skis had their rudders fixed (non retracting) and > mounted under the hull about 1/2 to1 metre from the stern. I've never > seen a surf ski with a stern mounted rudder. I've got one in my garage... http://www.surfskis.com/models.html Has pictures of about 6 different models with stern rudders. I believe all of the boats with undermount rudders can be custom ordered with a rear rudder. Kirk -- http://fastmail.fm - A no graphics, no pop-ups email service *************************************************************************** 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/ ***************************************************************************
[Kirk wrote] >I've got one in my garage... US designed? >http://www.surfskis.com/models.html >Has pictures of about 6 different models with stern rudders. Note that the Spectrum was designed "down under", has a built-in surf ski bow-lifter and the under hull rudder. I'd be interested to know who designed it and whether it is a take-off of a Burton. I also see the Javelin and Blade are under hull ruddered. > all of the boats with undermount rudders can be custom ordered > with a rear rudder. For racing rather than rescue? Alex . . *************************************************************************** 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/ ***************************************************************************
On Wed, 13 Nov 2002 15:59:44 +1300, "Alex Ferguson" <a.ferguson_at_chem.canterbury.ac.nz> said: > >I've got one in my garage... > > US designed? To the best of my knowledge. Its from the same manufacturer as the reference. The original owner used mine for a couple 1100(?) mile races, the Finlandia Challenge. > >http://www.surfskis.com/models.html > >Has pictures of about 6 different models with stern rudders. > > Note that the Spectrum was designed "down under", has a built-in surf ski > bow-lifter and the under hull rudder. I'd be interested to know who > designed it and whether it is a take-off of a Burton. > I also see the Javelin and Blade are under hull ruddered. > > > all of the boats with undermount rudders can be custom ordered > > with a rear rudder. > > For racing rather than rescue? Probably. A local has a Blade with a rear rudder. He ordered it with the rear rudder to avoid shallow water problems when racing. The stern rudder makes these turn brutally slowly. The blade/inferno would be a horrid rescue craft. Kirk -- http://fastmail.fm - One of many happy users: http://www.fastmail.fm/docs/quotes.html *************************************************************************** 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/ ***************************************************************************
This archive was generated by hypermail 2.4.0 : Thu Aug 21 2025 - 16:33:31 PDT