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08-03-2010, 15:27
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#1
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Registered User
Join Date: Dec 2009
Posts: 91
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Wind Vane with Transom-Hung Rudder
I know it's here somewhere.... direct me to the thread
How do you have both????? Pictures please
Thanks
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08-03-2010, 16:39
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#2
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CF Adviser
Join Date: Dec 2008
Location: sausalito
Boat: 14 meter sloop
Posts: 7,260
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http://www.cruisersforum.com/forums/...ane-35474.html
if you use the search feature to find "monitor wind vane" you'll find a dozen different threads. The link above is probably a good starting point.
__________________
cruising is entirely about showing up--in boat shoes.
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08-03-2010, 17:16
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#3
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Registered User
Join Date: Sep 2009
Location: Houston
Boat: '76 Allied Seawind II, 32'
Posts: 9,626
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This is from the cape horn website......i just picked a boat I knew had a transom hung rudder.
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21-03-2010, 09:55
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#4
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Registered User
Join Date: Dec 2009
Location: Basingstoke UK
Boat: Weston 8500 (27'9") - Mojo
Posts: 8
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There's an interesting development on this theme by Jan Alkema. he mounts the servo gear pivoted on the rudder head (rudder head mount, RHM) with an upsied down wind vane, USD, mounted on the pushpit.
Google Jan Alkema for details...
Rob.
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21-03-2010, 10:34
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#5
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Registered User
Join Date: May 2007
Location: Oxnard / Alameda, CA
Boat: Golden Gate 30, Westerly 23
Posts: 169
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__________________
We can't change the wind - but we can adjust our sails.
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21-03-2010, 12:18
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#6
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Registered User
Join Date: Mar 2006
Location: Whangaparaoa,NZ
Boat: 63 ft John Spencer Schooner
Posts: 956
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A stern hung rudder lends itself to the most efficient system I have ever used, the vane connected directly to a trim tab on the back of the rudder - a huge bonus. Not hard to design and build and probably way cheaper than any manufactured product.
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21-03-2010, 17:58
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#7
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Registered User
Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 20,420
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Yes. The trim tab on the edge of the rudder. BUT: How do we lock it when hand-steering?
And: how efficient is it?
Money not issue, I would go for a tiller connecting pendulum system. Because one can disconnect one and swing it out of the water.
barnie
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21-03-2010, 18:51
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#8
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Registered User
Join Date: Mar 2006
Location: Whangaparaoa,NZ
Boat: 63 ft John Spencer Schooner
Posts: 956
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The tab can free wheel when not in use, you'll never notice it.
It is probably the most efficient system I have used, I have used it surfing a light 30footer in mid tasman, and it worked well down below 5kn true, I would almost consider a transom hung rudder just to have one.
You just have to get over "I'll buy this and stick it on the boat" and get to "I can maake one of these myself" coz there are no commercial models around - not coz they are no good but coz they are limited in the number of boats they can be fitted to. You are one of the lucky ones.
You do need to be sure that you don't get positive feedback in the design, on mine that meant having the linkage either in front of or behind the main axis - can't remember now, but If I drew a picture I could figure it out.
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21-03-2010, 19:06
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#9
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Registered User
Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 20,420
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Quote:
Originally Posted by dana-tenacity
The tab can free wheel when not in use, you'll never notice it.
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Until you engage in reverse ...
And how efficient is it - as good as the pendulum?
b.
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22-03-2010, 01:37
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#10
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Registered User
Join Date: Feb 2010
Location: Los Angeles
Boat: Pearson 281
Posts: 684
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The trim tab/rudder mounted vane looks pretty interesting to me because installing a trim tab on a rudder expands self steering options and if Donald Street is right can reportedly be used to make manual steering a lot easier. Will have to poke around for DYI vane plans...
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22-03-2010, 07:07
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#11
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Registered User
Join Date: May 2008
Location: British Columbia, Mexico
Boat: S&S Hughes 38
Posts: 837
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The tim tab auxillary rudder steering is easy to build and operate.The best emergency steering,needing only light finger touch pressure to steer.I have built them before,and crossed the pacific using one.When backing it spins around freely,barely noticable,if you want you can increase steering power by also having a hand on trim tab arm(at stern).On my present boat I spent some time reviewing my options,and will build one,as it will be fairly custom.The wheelpilot has been pretty good though,and light!I have the surface area sizes and list of parts in my head,if anyone is interested.With the transom hung rudder your system is half built already.
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22-03-2010, 08:27
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#12
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Registered User
Join Date: Jan 2008
Location: Fort Lauderdale, FL
Posts: 310
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Lynn & Larry Pardey have used the trim tab self steering on both of their boats and been sailing around the world for the last 30 years with this system. It's well detailed in one of their books. I would give that system serious consideration.
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28-03-2010, 06:53
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#13
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Marine Service Provider
Join Date: Oct 2009
Location: St.Augustine ,Fl., USA
Posts: 204
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Using a trimtab on a transom hung rudder is so efficient that I steer my 24 ton ketch with a small tillerpilot attached to one. Scanmar makes a great unit [Auto Helm] that comes with it's own rudder or you can use your own like I have pictured on a 35ft Marples trimaran at my website seaworthysolutions.net.
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27-04-2010, 09:46
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#14
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Registered User
Join Date: Dec 2009
Posts: 91
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pictures ???
I found a trim tab style steering vane that I will rebuild with new rudder.
Need advice, direction on controlling the wind vane to the tab.
Simpliest would be a strong set screw that afixes the vane to the trim tab control
but not the most efficient as it would remain fixed at that point.
picture attached...
AND - suggestions on how to measure balance for rudder - forward edge, in front of pivot point, so that it's not TOO balanced (over compensated)
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27-04-2010, 15:39
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#15
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Registered User
Join Date: Apr 2009
Location: Vashon, WA
Boat: Haida 26', 18' Sea Kayak, 15' kayak, 6.5' skiff, shorts
Posts: 837
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The long way by Moitissier discusses trim tab vanes on outboard rudders.
I will be installing one some day. It is important that your tab axis and your rudder axis intersect. If they do not, you will get out of control positive feedback. What you want is negative feedback. Damping.
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