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Old 07-11-2010, 19:14   #16
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Belcher design vane on my 33' 19,000lb steel cutter.
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Old 07-11-2010, 21:19   #17
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try on a cat?

Anyone build one and install on a cat?
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Old 08-11-2010, 05:43   #18
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Anyone build one and install on a cat?
Possible, but you would need two.
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Old 20-11-2010, 18:27   #19
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Just bumbled across this site which claims free plans. They are not complete plans but concept sketches. Still worth a look.

Fay Marine yacht plans
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Old 28-11-2010, 16:51   #20
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The version I am looking at is mounted on the rudder head and requires no control lines. It isn't exactly a trim tab (attached to the rudder) but hangs in the water just behind the rudder using the wake of the rudder to give it leverage. As my boat has a mount for a conventional wind vane and a rudder that will easily take a trim tab (plus the boat is out of the water for the winter) I welcome suggestions for ideas to try.
I had some correspondence with Jan Alkema about his designs, he was most generous with advice, it is one of his hobbies. The one you seem to be referring to - the RHM/USD - is a fairly conventional servo-pendulum in its action, but by mounting it on the rudderhead, it acts directly through its mounting. The obvious advantage is that there are no lines running round the cockpit to the tiller, so it can be hinged up to free the cockpit space. I would love to build one, but my rudder is beneath the hull on a skeg...

Rob.
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Old 28-11-2010, 20:57   #21
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Originally Posted by rob2hook View Post
I had some correspondence with Jan Alkema about his designs, he was most generous with advice, it is one of his hobbies. The one you seem to be referring to - the RHM/USD - is a fairly conventional servo-pendulum in its action, but by mounting it on the rudderhead, it acts directly through its mounting. The obvious advantage is that there are no lines running round the cockpit to the tiller, so it can be hinged up to free the cockpit space. I would love to build one, but my rudder is beneath the hull on a skeg...

Rob.
That is the model I an thinking of, this boat's semi-sister ship (rigged as a gaffer) sails for days on end with just a lashed tiller so I am not in a hurry ... I have lots of other irons in the fire this winter.
As I already have a wind vane mount (teak boomkin that wraps arounf the rudder head, built for and used as a wind vane mount) so I might built two versions, the RHM (ruderhead mount) and servo pendulum
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Old 30-11-2010, 16:56   #22
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hpeer - could you tell us a bit about what is involved in switching from steering yourself to, I assume, locking the tiller / wheel and engaging something on the vane??

Can the vane's rudder be left in the water when not in use?

I have never had / used a windvane. Is your's easy enough to engage / disengage, that it would be usefull for coastal legs of only 1/2 hour to an hour on each tack, or would it be much better suited for very open sailing on one tack for long periods?
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Old 01-12-2010, 00:55   #23
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I do not use mine on tacks that I expect to be shorter than lets say about 10 minutes.

Leaving the pendulum rudder in the water mostly depends on the material it's made from. If it is wood, better take it out, plastic and metal rudders can often stay in but any growth on it will reduce it's effectiveness.
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Old 01-12-2010, 10:06   #24
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Ok... simple question from a simple guy in simple terms....
My Corribee 21 has a very light and responsive helm and I've been wondering if I could set up a wind vane to steer her and relegated the ST1000 to emergency use.
I cant set up on the stern as that's where my engine hangs and moving it from centre is not really an option as the transoms not that wide anyway...
What I was thinking/wondering was... if I attached a 360degree quadrant (if that's the right word) centre base line permanently fixed to the head of the rudder post and the centre of the quad arch fixed firmly to the tiller centred.... hope that's understandable...
Directly over the rudder post and fixed to the Quad would be a swivel point for the vane pole to sit in with a bar pointing out over the quadrant arch... the arch pre drilled with holes at regular intervals.... vane removable when not required.
Theory... if I allow the vane to free swivel to the wind and then use pegs either side of the now repositioned bar to keep it in place could this work or would the vane size needed for the loads be to great to be practical.
Sorry if it sounds garbled but I'm not that good with technical descriptions..
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Old 01-12-2010, 10:09   #25
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Sorry.. meant to post this with the above post.... showing my stern..
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Old 01-12-2010, 10:17   #26
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boatman. yes not sure the loads is a big question under heavy wind. I've seen some backstay sail like approaches, but need to look them up. Basically, using a small triangular or rectangular sail on the backstay with a frame as a means to keep on course, with lines adjusted as needed to the tiller. Not good for larger boats but maybe good enuf for you?

anyway, with any of this - could you at least try and jury rig some quick and dirty test device to see if the mechanics work before committing to a complete design?
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Old 01-12-2010, 10:25   #27
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Ahhh... Salty I think my explanation was not that great... no use of backstay... a free standing unit set up on the existing rudder stock/post head where the tiller attaches.... maybe I should draw what I'm thinking on a piece of paper photograph it with my phone and post it.... as you can see by the rudder below the set ups quite a bit fwd of the stern..
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Old 01-12-2010, 10:30   #28
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Are you sure about "can't"?

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Old 01-12-2010, 10:42   #29
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That looks sexy... Make , Cost... viability on a 1500euro boat..??
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Old 01-12-2010, 16:30   #30
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wow...Sven...never seen anything like that before! Think thats a real contender!

boatman - was thinking backstay sail (sort of like an anchor sail)... triangle frame (light pvc?) to act as vane, lines running to tiller or wheel. No worry about where rudder post or rudder is. Only issues are having a pully system deployed on rails to connect lines back to tiller - both in wind and down wind!
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