Yawl version for Grey Seal; ? for Gert.

[chuckm]

How are you going to work out a tiller arrangement, or mechanical steerage if you were to build the Seal with a Yawl mast? She sure would look sweet with that setup. Maybe the Bermudian is more practical, but you seem like a traditional guy, so I'll be curious-envyous as to what sail version you end up with.

[JimM]

I. Oughtred designed a push pull linkage for the Eun na Mara. You should be able to find the information on Dale H web site for his boat. http://www.alistego.com/Site/Welcome%7CBoat_Building%7CPlywood_Epoxy%7CSailing% 7CHomebuilt_Boats%7C.html

[chuckm]

The CY version as a smaller rudder, where the GS is a more massive and traditional rudder keyed to the straight stern post, at an angle which only allows the tiller to support against it. The only arrangement I can see would be a large "U" shaped or oval "O" ring inside of the tiller arm to escape the mizen mast. That or offset the mast where it clears the operation of the tiller arm. I quess I could "snap" a zoomed image of the plans showing the rudder and stern post. There's not much on the very detailed plans.

[Thorne]

I've seen some photos of the oval or heart-shaped "split" in a tiller to go around the mizzen mast -- but haven't been able to find 'em since. As above, can't see how a push-pull tiller would work on a boat that size.

[gert]

I was thinking of this; I beleive this is from Dales site.

http://farm4.static.flickr.com/3258/2468411823_de479486e2_o.jpg
I seem to have lost the image that shows the rudder end.
It converts standard tiller to push-pull; sort of like your car,
just inboard of the front wheels. (assuming front wheel steering;))

But feel free to give me your thoughts.

[JimM]

Yep. that's the one I remember.

[dennisbur]

Dale's site also has a link to a laminated tiller that does a "horseshoe" around the mizzen.

[chuckm]

A horseshoe shaped bent and laminated tiller, that clears the mizzen. I can't find it. Would it be practical or to "far out" on a traditional look double ender? Ian's original drawing is is a single mast sloop. But then the CY looks very classic... I'm getting a head of myself, still sanding and almost ready for primer and painting the hull. Just looking ahead, thanks guys.

[JimConlin]

Other possible approaches:
- Step the mizzen mast on deck and have the tillerhead below.
- Have a separate tiller post forward of the mizzen and link the tillerpost and rudderpost with yokes and low-stretch line such as vectran.

I don't know the boat design, so these might not be appropriate.

[Robert W. Long]

http://i73.photobucket.com/albums/i223/rubjohnson/sunshinetillerlink2.jpg


This is how Wayne Brown got around the mizzen on my Caledonia, built by him and now owned by me.

[Robert W. Long]

Another view of Wayne Browns adaptation of Caledonia Yawl tiller arrangement.

http://i73.photobucket.com/albums/i223/rubjohnson/sunshinetillerlink1.jpg

[htom]

With the tiller post forward of the mast, you can link to the rudderpost aft of the mast with yokes and rigid bars; line is not needed. (It's a form of a parallelogram linkage; having said that, I'm not sure of the accuracy required to make it work without binding.)

[gert]

I'm not sure of the accuracy required to make it work without binding

We might need some bronze universal joints :D

Is there such a critter?

[JimConlin]

With the tiller post forward of the mast, you can link to the rudderpost aft of the mast with yokes and rigid bars; line is not needed. (It's a form of a parallelogram linkage; having said that, I'm not sure of the accuracy required to make it work without binding.)
Adjusting the 'sweep' of a yoke solves the geometry issue.
The low-stretch line would also be much lighter and, I think, more reliable.

[dennisbur]

Laminated tiller is here:

http://www.geoss.com.au/eun_mara/ian_dunedin13.htm

it's actually circular; laminated from two "horseshoe" pieces.

[gert]

frome above link: thanks
http://www.geoss.com.au/eun_mara/images/Ian_Dunedin/2008-05-23/Tiller-%20in%20position.jpg

How does this relate to the traveler?
Would the traveler be tall so it spans the laminated tiller?
I suspect my ignorance is showing :o
They are probably tall anyways to clear even a regular tiller's sweep.

[chuckm]

That is'nt obtusive, are even ugly, it works great for a traditional look. Thanks for posting. To me the simplier the mechanic's the better. That's simple.