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Old Jul 29, 2011, 01:20 PM
Dan Elliott
United States, TN, Nashville
Joined Jul 2011
111 Posts
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Wingsail Catamaran Model

Working model of AC45. What do you think? I've been working on this model for about a year. After three hull sets, and two wingsail designs I finally got it to work. It's a handful, the first time out I pitch poled it.
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Old Jul 29, 2011, 09:13 PM
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1967250s's Avatar
United States, VA, Alexandria
Joined Sep 2008
989 Posts
Cool! What are the dimensions? Any more pics of the construction? Plans?
Enquiring minds want to know.............
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Old Jul 29, 2011, 09:43 PM
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That thing is BADA$$ LOVE IT BRO, are you going to make more to sale?
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Old Jul 29, 2011, 09:45 PM
slow & draggy...
Hobiestoke's Avatar
Albuquerque, NM
Joined Jul 2004
463 Posts
very very cool!!! Love it looks very tech, how does she sail?
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Old Jul 31, 2011, 03:21 PM
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Aten W Arthog's Avatar
Joined Sep 2002
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The guy that can perfect a scale AC45 America's Cup cat, and market it next year while the races are going on, could make a tidy profit.
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Old Aug 01, 2011, 07:48 AM
Dan Elliott
United States, TN, Nashville
Joined Jul 2011
111 Posts
Hey, Hello. Thanks for your interest. Sorry, I should have included this information in my first post. The Models deminsions are 39" Hulls made of 16"thk. PVC sheet, 48" Mast, 24" crossmembers made of Carbon Fiber. Rudders and Daggerboards 1/16" Carbon Fiber Sheet. Wingsail is PVC structure covered with vinyl sheet, Approx.49 sq. inches. The spinnaker was barrowed from my Tunder Tiger ENTZ model. It sails well with and without spinnaker, but I'm not using any keel weights so it's very easy to flip in a strong gust. That's what makes it so much more of a challenge to sail than a monohull. I'll up load more photos, and try to show you how the wingsail rigging works. Thanks again for your comments.
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Last edited by Dan Elliott; Aug 01, 2011 at 09:04 AM.
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Old Aug 01, 2011, 10:43 AM
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1967250s's Avatar
United States, VA, Alexandria
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Top notch work there, Dan. More pics!
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Old Aug 01, 2011, 11:29 AM
Dan Elliott
United States, TN, Nashville
Joined Jul 2011
111 Posts
I'll get some more photos posted, and thanks for the compliment.
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Old Aug 01, 2011, 02:52 PM
Dan Elliott
United States, TN, Nashville
Joined Jul 2011
111 Posts
I guess I could sell plans. The Hulls were just going to be a platform for the Wingsail, but I soon realized I needed to use the same design as the real AC45's if I wanted the model to perform like the real thing. I could create full size paper templates that one could use to cut out the hull forms as well as the wing. I made everything adjustable, so it's "tweekable". I'll work on it.
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Last edited by Dan Elliott; Aug 01, 2011 at 03:03 PM.
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Old Aug 02, 2011, 04:59 PM
Dan Elliott
United States, TN, Nashville
Joined Jul 2011
111 Posts
Wingsail Cat in the "Wind" Pool

Testing the Wingsail in the "Wind" Pool. I have a great job. I design interactive exhibits for children's museums. I'm presently working on GulfQuest, Maritime Museum, and we built a "Wind" Pool like the one in the National Maritime Museum Cornwall, UK. It's just a prototype to prove concept for Footy sized sailboats for kids, but it also works great for testing boat designs without getting wet. The wind speed is adjustable along the length of the tank. It's possible to create white caps if you turn them up all the way. I just wish it was bigger.
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Old Aug 02, 2011, 05:32 PM
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Dick L.'s Avatar
Minnesota, USA
Joined Aug 2002
2,207 Posts
Dan -

I would be interested in a pic looking at the top (or bottom) of the wing if you are up for special requests. Would like to see your wing profile that can't be seen from side photos.

Thanks, Dick
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Old Aug 03, 2011, 08:07 AM
Dan Elliott
United States, TN, Nashville
Joined Jul 2011
111 Posts
Hi Dick, Hope this helps, It may not be to clear in this rendering, but the two halfves of the wing are held together with a "String Hinge" that runs from the top of the sail thru to the bottom. This eleminates the need for heavy pins, and reduces friction as the entire wing assembly hangs from the mast.
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Last edited by Dan Elliott; Aug 03, 2011 at 08:15 AM.
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Old Aug 03, 2011, 12:03 PM
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United States, VA, Alexandria
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Can you control the camber somehow? The string hinge is an excellent idea, too.
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Old Aug 03, 2011, 12:06 PM
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On this subject, what links to the AC45/72? does anyone out there have?
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Old Aug 03, 2011, 12:20 PM
slow & draggy...
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Albuquerque, NM
Joined Jul 2004
463 Posts
Good Lord Dan, I just gotta say, those pics are fantastic! You sir, have a DREAM JOB!! Nice boat! Have you thought about small daggerboards keels? they may help keeping it from flipping over so easy, I built an RC Hobie 18 and added small keels to the daggerboards and it wont flip nearly as easily now and still sails plenty fast
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