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Riv View Drop Down
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Posts: 353 		Post Options Post Options   Quote Riv Quote  Post ReplyReply Direct Link To This Post Topic: Trapwing Prototype
    Posted: 24 Aug 16 at 9:29pm
Is this a development of the foiler 21?
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Posts: 1 		Post Options Post Options   Quote Campbugler Quote  Post ReplyReply Direct Link To This Post Posted: 20 Aug 16 at 9:47pm
Doug,
Just got my hands on Melges 24 rc with power ballast.
Appears in exc. shape. Any recommendations for battery replacement?
If I wanted to sail without power ballast what would I have to add to keel.
Have extensive dinghy and offshore experience.
Currently sailing a Banshee. Contemplating getting her foiling.
Thanks
Phil Vandenberg
Santa Cruz,Ca
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Posts: 66 		Post Options Post Options   Quote Doug Lord Quote  Post ReplyReply Direct Link To This Post Posted: 01 Jun 10 at 10:29pm
Mark Bryant( [/url]http://www.markbryantsailing.com ) ,great sailor, disabled sailing coach, and someone who has encouraged me a great deal on this project has suffered a horrible tragedy that no one should ever have to go thru: he has lost his 29 year old son.
My condolences to him and his family in this awful time.
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Posts: 66 		Post Options Post Options   Quote Doug Lord Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 10 at 4:49pm
Originally posted by radixon

You have had 15 years of thought behind this, personnally I would of started a prototype full size model with my beer fund. Have you considered doing this,

================
Building of a full size prototype is the priority.....
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alstorer View Drop Down
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Posts: 2899 		Post Options Post Options   Quote alstorer Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 10 at 11:09am
radixon: he's based in Florida. The Florida based 2.4mr builder that he claimed to be working with said that he'd be happy to build a prototype. There really are no excuses...
-_
Al
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Posts: 2407 		Post Options Post Options   Quote radixon Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 10 at 8:40am
You have had 15 years of thought behind this, personnally I would of started a prototype full size model with my beer fund. Have you considered doing this, I know it costs money but unless you dont have anything to show, its not going to get off the ground.

If you speak to Rodney (D-One) and Mike (Blaze) who are on here, they may be able to point you in the right direction.
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Posts: 66 		Post Options Post Options   Quote Doug Lord Quote  Post ReplyReply Direct Link To This Post Posted: 19 May 10 at 10:13pm
Pictures of wing deployed to port. One of the key elements in the design is that the wing pivots adjustably athwartship. This allows the lee side to stay clear of the water, the weight to stay low and/or the boat to heel a bit with the wing level or a bit lower. When the weight is centered the tips of the wing can be supported by shock cord initially allowing the wing to pivot when the weight is moved just a little. The amount of pivot is adjusted by adjusting the line that supports the end of the wing-see rough sketch below.




Edited by Doug Lord
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Posts: 66 		Post Options Post Options   Quote Doug Lord Quote  Post ReplyReply Direct Link To This Post Posted: 19 May 10 at 9:47pm
Originally posted by alstorer

so the wing itself is buoyant?

==========================
Yes
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alstorer View Drop Down
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Posts: 2899 		Post Options Post Options   Quote alstorer Quote  Post ReplyReply Direct Link To This Post Posted: 19 May 10 at 8:55pm
so the wing itself is buoyant?
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Al
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Posts: 66 		Post Options Post Options   Quote Doug Lord Quote  Post ReplyReply Direct Link To This Post Posted: 19 May 10 at 7:23pm
Originally posted by RS400atC

Doug,


Have you done any calculations regarding Sail Carry Power (aka righting moment), weight and wetted area?


What kind of design windstrength is it aimed at?


80kg of ballast is not much in relation to the all up weight.


You could compare the ratios with those for existing craft to indicate performance.


I'm not involved with 'true' disabled sailors but I am involved with a keelboat class where many of  the older sailors have physical problems but greatly enjoy sailing on a level basis with fit people. There is more to sailing (especially racing) than high performance. Also people who can't walk are as individual as the rest of us (perhaps more so?), I would not generalise about what they all want. If you succeed in fulfilling someone's dream to sail faster, good luck!


======================
Thanks. The target SCP/Total Weight for the turbo version is 30%. That kind of power is not critical though since this concept covers a broad performance spectrum. Testing the prototype is the key to finding the ideal production boat characteristics. Keep in mind that while it is critical to me that a version(or configuration of the same boat) of the concept work to provide disabled sailors a very fast, safe ride the concept is not limited to disabled sailors. Some high powered versions may be too much for disabled sailing.
Lots of potential for a new kind of performance sailing....
PS- don't forget that the wing is sealed and would resist capsize with a huge amount of force even with the ballast on the wrong side.


Edited by Doug Lord
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