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Forums > Stand Up Paddle General

Wanna go really fast?

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Created by kajgyr > 9 months ago, 17 Sep 2011
kajgyr
25 posts
17 Sep 2011 2:08PM
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Here's something I've been developing: a below-hull feature which increases stability significantly, allowing for the use of much narrower hulls, and significantly more speed. The picture is a very narrow Surfski - something I couldn't even sit on without tipping before the addition of said feature. It's kinda fun to cruise at what is currently considered race pace. Now perhaps boat designers can toss the notion that width=stability when designing canoes, kayaks, and SUPs.

Sorry, international patents are being filed so I can't furnish pictures of the design yet. Rest assured it's unlike anything you've ever seen.

CMC
QLD, 3954 posts
17 Sep 2011 4:16PM
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Now were talking. I watched Kelly Margetts paddle a prone paddleboard onto a plane standing up, problem is only he could stand on it.

Question though, how is the performance in rough water or is a flat water innovation?

kajgyr
25 posts
17 Sep 2011 2:19PM
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It's actually very good in rough water - especially when compared with flatter planing hulls, as they tend to roll with the wave. This acts as a dampener to rolling forces be they from waves or body position.

laceys lane
QLD, 19803 posts
17 Sep 2011 4:29PM
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funny enough, last week i thinking about ship type features-the stuff you don't see that's under water.

i will be interested to see what you've come up with.

shimmyshazbo
QLD, 251 posts
17 Sep 2011 5:18PM
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i feel like this is one of those ads where i click on it and it asks me for my credit card details

laceys lane
QLD, 19803 posts
17 Sep 2011 5:39PM
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underwater ama's?

teatrea
QLD, 4177 posts
17 Sep 2011 5:48PM
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Wouldnt be a keel would it? Often seen skis cruising along and thought , only if you could sand on it!

DavidJohn
VIC, 17510 posts
17 Sep 2011 6:15PM
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I'm guessing something like this..

DJ

kajgyr
25 posts
17 Sep 2011 11:46PM
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None of the above. Think leverage, profiles, and minimal wetted surface and see what you come up with. It's not something you've seen before. Kind of exciting, as it broadens the horizons of what can be done on the water.

Salatiela
NSW, 378 posts
18 Sep 2011 7:20AM
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hummmmm... triangle shaped foil?

gregc
VIC, 1299 posts
18 Sep 2011 8:55AM
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Nah it's a full on sub. Apparently bought cheap during the GFC. Feeding the crew gets expensive though

gregc
VIC, 1299 posts
18 Sep 2011 8:56AM
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DJ how on earth is a shirt going to help stability??

kajgyr
25 posts
18 Sep 2011 7:01AM
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Too funny...I should have thought of something as simple as a shirt - it would have saved lots of time and fiberglass dust.

The triangle idea is thinking creatively and is closer than nanosubmarines.

Cuttlefish
QLD, 1332 posts
18 Sep 2011 9:10AM
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If it was me I'd put a fin horizontally onto the hull below the water line on either side.

62mac
WA, 24860 posts
18 Sep 2011 7:15AM
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If DJ doesn't know about it,its a hoax and please dont get Lacey fired up about fins

laceys lane
QLD, 19803 posts
18 Sep 2011 9:58AM
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62mac said...

If DJ doesn't know about it,its a hoax and please dont get Lacey fired up about fins

fins, did some one say fins

kajgyr
25 posts
18 Sep 2011 8:45AM
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Cuttlefish said...

If it was me I'd put a fin horizontally onto the hull below the water line on either side.



Tried that - can't achieve the same resistance to tipping due to shorter lever lengths of two fins compared to...

HumanCartoon
VIC, 2098 posts
18 Sep 2011 10:51AM
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Hmmm...I have a feeling it's something that might make beach transitions challenging...

shunter
WA, 441 posts
18 Sep 2011 8:56AM
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I am guessing something like what fishing trawlers use, stability down riggers but on smaller scale, something along the lines of a winged keel with open top type buckets/pods which act as sea anchors as the board tips.

As the board rolls up the pods act as a sea anchor, open top allows water to "flow" out on the down roll. The pods wouldn't have to be big so pretty stream lined/low drag for paddling .

well thats my guess.... but I do like the idea on a mini collins class sub filled with wallabies prop fwds for ballast....Go the Irish

shunter
WA, 441 posts
18 Sep 2011 9:00AM
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Or antil roll tanks..., two pvc pipes open ended tied to the bottom of the board

gregc
VIC, 1299 posts
18 Sep 2011 11:04PM
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Is there any chance that it could be an extremely good sense of balance? Would that be difficult to patent?

Lobes
885 posts
18 Sep 2011 9:57PM
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Its a really really long fin

kajgyr
25 posts
18 Sep 2011 11:40PM
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gregc said...

Is there any chance that it could be an extremely good sense of balance? Would that be difficult to patent?


That's a good one. You never know with the (U.S.) patent office these days. If you can patent pre-existing plants (which has been done), then maybe.

Mere mortals have a difficult time just sitting in the Surfski pictured, but perhaps the paddler is my alien double.

Cuttlefish
QLD, 1332 posts
19 Sep 2011 8:42AM
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kajgyr said...

Cuttlefish said...

If it was me I'd put a fin horizontally onto the hull below the water line on either side.



Tried that - can't achieve the same resistance to tipping due to shorter lever lengths of two fins compared to...




Well at least I was off the starting line with you when the gun went off.

RJK
QLD, 622 posts
19 Sep 2011 11:40AM
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How do you go pivot turning the ski around a bouy? No point in going fast in a straight line just to be taken on the turns.

kajgyr
25 posts
19 Sep 2011 10:38AM
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RJK said...

How do you go pivot turning the ski around a bouy? No point in going fast in a straight line just to be taken on the turns.


Very good question. One of the design's advantages is that you can foot-steer much better by canting the board slightly, and/or pivot turn as you normally would. I will soon be making a video to demonstrate yet another benefit...



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"Wanna go really fast?" started by kajgyr