No. Trim tab on the rudder is another setup. Servo pendulum is a foil in the water that is steered by the windvane and that is used to give mechanically more power to the signal sent by the windvane. Scanmar International has good explanation on its web page.
Arto
From: Michael Fischer <mifi601@gmail.com>
To: harryproa@yahoogroups.com.au
Sent: Wednesday, July 13, 2011 7:40 PM
Subject: Re: [harryproa] Re: Wind vane vs compass self steering
To: harryproa@yahoogroups.com.au
Sent: Wednesday, July 13, 2011 7:40 PM
Subject: Re: [harryproa] Re: Wind vane vs compass self steering
so servo = trim tab on the rudder?
I have seen that trim tab operated by small elect. tiller pilots - need minimum juice because of amplification due to trim tab. but needs to be mounted on (and move with) rudder - afaik
I have seen that trim tab operated by small elect. tiller pilots - need minimum juice because of amplification due to trim tab. but needs to be mounted on (and move with) rudder - afaik
On Wed, Jul 13, 2011 at 11:47 AM, bjarthur123 <bjarthur123@yahoo.com> wrote:
my understanding is that the servo is just a foil in the water whose AOA is adjusted by the wind vane. changing the AOA causes it to swing sideways about a horizontal axis. this movement is then coupled to the rudder(s). so yes, it needs to be shunted, but no, it does not need to be trailing at the back of the boat. agree?
i think the optimal place for the wind vane would be on the ww hull away from the sail turbulence and in the fore-aft center of the boat. the servo would be best in the lw hull to insure it was always in the water if the ww hull flew, and again in the fore-aft center. not ideal to have to connect the two at such a distance, but you've already got other lines traversing the tramp, so what's one more.
ben> The servovane needs to be trailing the boat or at least shunted to the new tack. Without servovane the self steering by windvane is not powerful enough.> From: bjarthur123 <bjarthur123@...>
> Arto
>> Â
> To: harryproa@yahoogroups.com.au
> Sent: Wednesday, July 13, 2011 2:55 PM
> Subject: [harryproa] Re: Wind vane vs compass self steering
>
>
> would it not work to put in on the ww hull?
>
> ben
>
> > Also how do you setup the windvane and servovane to the proa? It should be at the back of the boat but what do you do after the shunt?
>
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