Wharram Thoughts

[owly]

Originally Posted by sailrjim

Having read some of the travel blog of Pete Hill and wife Carlie, IIRC, Pete had LAR keels on his stretched KD 860 and lost one of the keels and said they had not noticed until hauled out in S. Africa. there is a series of photos showing him fabricating a new keel.

Some years ago, I met a south African couple in FL who sailed a modified Woods Mira design (original builder had added bridge deck cabin) having twin swing centerboards and cutter rigged. They said the boards were rarely used. Lost THE engine approaching Trinidad and entered port in Chaguramas (sp?) not using boards or engine.
Jim

Jim:
It was not an LAR keel that fell off, but an anti vortex panel, and Pete then installed the LAR keels...... You will see that if you reread. The AV panel is a small triangular protrusion that extends laterally inboard from the corner of each hull.



If I did this right, there should be 3 photos here. One of Bernd Kohler's AV panels, and two of Oryx on the beach in Portugal early in it's life, before pete added the keels..... obviously from the photos there are no keels at this point. He added the LAR keels, and later lengthened them (Uruguay I think). Bernd later offered two board options, only one of which is shown on the KD 860 site, which is a single centerboard in a pod between the hulls, The other was what he called "luff boards", and the drawings are available as far as I know......... It consisted of two leeboards, each on the inboard side of one hull rather than being on the outboard side as leeboards usually are. These are fairly slender airfoil shaped boards...NACA 230 series I believe, and retract by swinging aft like a centerboard. Oryx was lengthened considerably, from the plans (1.4M I believe), and you will see in the photos it has a chine at bridge deck level to give more interior space, which the KD 860 design on which it was based lacks. You can find and download a PDF from Kohler's web site describing the AV panels and how they work. I've also included a drawing of the centerboard from the Kohler web site.


H.W.