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Dean Wilkerson
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  • Arthur Gottschalk
  • Iain & Cherry Mae Cairns

Dean Wilkerson's Discussions

Hobbyhorsing
13 Replies

     Any boat will hobbyhorse in some conditions, and you can't always change course to get out of it.  Factors such as length compared to wave period, rocker, weight distribution, and longitudinal…Continue

Started this discussion. Last reply by Reuben Filsell Oct 10.

Wings
2 Replies

Having an interest in trimarans also.....  The question of "wings" comes to mind with regard to the limited internal space in some Wharrams.  The Tangaroa in particular appears like it would be…Continue

Started this discussion. Last reply by Dean Wilkerson Sep 17.

free standing masts

My interest is in junk rigs, which have progressed a long way since James decided that they were unsuitable for Wharrams.   Instead of the flat junk rig that was pretty universal in those days, we…Continue

Started Feb 28

Rigid 37 footer??
18 Replies

I was looking at Catamarans for sale, and recently found an interesting "Custom Wharram Design 37" that appears to be rigid.   Anybody know the story if this boat?   It can be found here at the link…Continue

Started this discussion. Last reply by Arthur Gottschalk Sep 11.

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Latest Activity

Reuben Filsell replied to Dean Wilkerson's discussion Hobbyhorsing
"And it could possibly be used as a step for swimmers. Win win win."
Oct 10
Dean Wilkerson replied to Dean Wilkerson's discussion Hobbyhorsing
"Ruben:     I like the foil concept... I've toyed with the idea before.   The useful range of angles of attack for the foil you are using, if I read the chart right is about 8 deg either side of being in line with the…"
Oct 9
Reuben Filsell replied to Dean Wilkerson's discussion Hobbyhorsing
"Hi Dean, My understanding of the rationale behind the canoe sterns is that these designs are primarily for tradewinds sailing, i.e., downwind, as I understand it the idea is that the canoe stern sinks into the following wave rather than be lifted by…"
Oct 9
Dean Wilkerson replied to Dean Wilkerson's discussion Hobbyhorsing
"Ruben:       The sponson added to the inboard side of the hull could incorporate boarding steps, functioning like a transom with steps.  It's main function being to add displacement above the WL, and secondary…"
Oct 9
Reuben Filsell replied to Dean Wilkerson's discussion Hobbyhorsing
"D.W. I take it your sponsons are to retrofit an existing boat rather than a new build, in which case I'd be inclined to put a swept back horizontal foil on the bottom of the rudder skeg set parallel to the waterline, such a foil would not only…"
Oct 8
Dean Wilkerson replied to Dean Wilkerson's discussion Hobbyhorsing
"I misunderstood your reply obviously..... What is shown in the photo has no resemblance whatsoever to what I was suggesting, which was a sort of pod steamlined, and added onto the inboard side of the  stern above waterline in such a way that…"
Sep 25
Ricardo Aráoz replied to Dean Wilkerson's discussion Hobbyhorsing
"Sorry, I must have messed up my meaning. My objections were not directed against transom sterns but against transom sponsons as illustrated in the picture Levi Verwoest posted."
Sep 25
Dean Wilkerson replied to Dean Wilkerson's discussion Hobbyhorsing
Sep 25
Ricardo Aráoz replied to Dean Wilkerson's discussion Hobbyhorsing
"Have you people considered the stress those sponsons will transmit to the hull in a seaway? And what about slowing recovery after submersed? I wouldn't like that. Dean, if you'd prefer transom stern you might look at Richard Woods designs…"
Sep 24
Brad Ingram replied to Dean Wilkerson's discussion Hobbyhorsing
"I love not broaching surfing big waves with my canoe sterns. For racing and inshore sailing, I'd rather be on a Nacra, but for cruising out there alone, the canoe sterns are the shit. "
Sep 23
Dean Wilkerson replied to Dean Wilkerson's discussion Hobbyhorsing
"I was envisioning a foam and glass pod streamlined into aft end of the hull beginning just at the waterline creating additional displacement.  It might begin just aft of the last bulkhead... or a bit further forward.  The idea being to…"
Sep 23
jmh2002 replied to Dean Wilkerson's discussion Hobbyhorsing
"I'm sure I have seen some Wharrams fitted with sponsons aft, but a long time ago. I'm not sure if I will be able to find the photos, and I'm not sure how successful it was, otherwise I'm sure the idea would have caught…"
Sep 22
Levi Verwoest replied to Dean Wilkerson's discussion Hobbyhorsing
"Something like this? Its a "long tail" boat in Thailand, similar hull shape to a wharram but with stern sponsons. I think intended to help with squatting at speed, but should also prevent pitching. Though is the hobbyhorsing/ pitching a…"
Sep 22
Dean Wilkerson posted a discussion

Hobbyhorsing

     Any boat will hobbyhorse in some conditions, and you can't always change course to get out of it.  Factors such as length compared to wave period, rocker, weight distribution, and longitudinal distribution of  displacement with greater displacement aft than forward, and of course size matters.   The modern catamaran hulls have benefited from many years of experience, and trial and error.  The transom stern with the bottom of the transom right at or slightly above the waterline is said to…See More
Sep 22
Dean Wilkerson replied to Dean Wilkerson's discussion Wings
"     I knew Richard worked with James originally, and they obviously have major design differences such as you mention..... bridge deck cabins and rigid beams, and wings.   I hardly see wings as a pounding issue,…"
Sep 17
Graeme replied to Dean Wilkerson's discussion Wings
"Richard Woods did it on early V-hull designs of his. Makes the sales pitch for it on his site. Woods worked on designs at JWD before going his own way circa mid 70s. (From late 70s, early 80s, JW had strong disagreements with and criticisms…"
Sep 16

Profile Information

I am:
Just Looking
What boat (s) are you building or do you own?
Homebuilt junk rigged canoemaran
Country, City, and State?
Montana

Comment Wall (2 comments)

At 8:49am on March 23, 2019, Maris Ahmed said…

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At 7:29pm on April 8, 2019, Iain & Cherry Mae Cairns said…

G'day Dean, unfortunatley this did not happen with the Teheni hulls. The project stood to long and got wet rot in the hulls. I am in the process of buying a new boat also in my picture albums ORO with a center cockpit, this has no mast so the intention is to Junk Rig her. As original plan. I will keep an eye out for your Build as well. Fair winds.

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