Roger Long wrote:

You really should not be thinking about self steering on an 18 footer
unless it is one of those miniature keel boats with full deck and
cockpit. A sudden wind increase in a capsizable boat that is trying to
keep maintaining a relative wind direction could be very bad.



It is just exactly that, Roger.
Catalina Capri 18 - ballasted fin keel - NOT a ceterboard -
with a cozy cabin for two.

Lauri Tarkkonen wrote:

In cavelamb himself writes:


Lauri Tarkkonen wrote:


There are several systems and it was very common before they came up
with the servo pendulum. If you have read Peter Förthmanns books, then
you should have noticed him explaining such things on pages 46-47 and
there are pictures of two on page 46.

I think you should take Peter's book seriously, he knows what he is
talking about. I studied this topic about 5 years before I decided on
the system and now my vife says: Why did you not buy this earlier.

- Lauri Tarkkonen


Are you refering to the auxillary rudder approach on pager 46?


There is one wit an auxiliary and one on the main rudder.


- Lauri Tarkkonen


Ok, the trim tab on an exernal main rudder seems to be about page 51.
46-47 are trim tab on aux rudder,
At least that's what I'm seeing here...

I'm not quite sure how the H vane design works, though.
Must be a "turn the corner" joint hidden at the bottom?

Richard

On Tue, 13 Nov 2007 23:07:58 -0600, cavelamb himself
wrote:

Wayne.B wrote:

On Mon, 12 Nov 2007 20:13:20 -0600, cavelamb himself
wrote:


I've read the book, looked at the setup Roger has on Strider and
just can't go there (my boat is just way too small).


What about a small tiller pilot with a small wind vane sensor?

That's about what I drew up last night to check out my thinking.
Looks simple enough at first blush but I'd love to see some prior art
on the subject.

===============

Looks like the Raymarine S1 TillerPilot has an option for apparent
wind angle input:

http://www.boatersland.com/raye12190.html