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Old 08-03-2010, 16:27   #1
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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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Old 08-03-2010, 17:39   #2
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Sailing with a Monitor Windvane

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.
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Old 08-03-2010, 18:16   #3
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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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Old 21-03-2010, 10:55   #4
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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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Old 21-03-2010, 11:34   #5
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Check out Hydrovane.
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Old 21-03-2010, 13:18   #6
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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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Old 21-03-2010, 18:58   #7
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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.

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Old 21-03-2010, 19:51   #8
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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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Old 21-03-2010, 20:06   #9
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Quote:
Originally Posted by dana-tenacity View Post
The tab can free wheel when not in use, you'll never notice it.
Until you engage in reverse ...

And how efficient is it - as good as the pendulum?

b.
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Old 22-03-2010, 02:37   #10
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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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Old 22-03-2010, 08:07   #11
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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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Old 22-03-2010, 09:27   #12
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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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Old 28-03-2010, 07:53   #13
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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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Old 27-04-2010, 10:46   #14
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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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Old 27-04-2010, 16:39   #15
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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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