It's actually not specifically to do with the skeg. It's the distribution of force across multiple figure eight lashings, and multiple loops in each lashing, instead of concentrated in two very small area of contact as with a pair of pintle & gudgeon connections. There could simply be more lashings on the upper area of the connection, if there were not a skeg forward of the lower part of the rudder to lash to. On a flat transom boat like a Monty, one would have to attach a vertical piece the thickness of the rudder to the transom, to stitch the rudder itself to. But it wouldn't need to extend below the hull like the skeg on a Wharram. cheers, John S. On 01/10/2015 08:38 AM, Gerald Wolczanski wrote:
The Wharram designs use ropes vice pintles/grudgeons. It works for them because of that skeg which allows for a good mechanical connection the length of the rudder. See: http://wharrambuilders.ning.com/forum/topics/rudder-lashings-instead-of-pint...
Don't know if such a design would work or apply to a design like a Montgomery. Interesting nonetheless.....
Jerry W
On Sat, 2015-01-10 at 08:32 -0800, Tyler Backman wrote:
Jerry,
It's a shame nobody is manufacturing his inventions anymore, this is a great pintle design.
It seems unlikely to me that the pintle could have failed during actual operation- maybe it was damaged in storage by the previous owner. The specs on this pintle you used on a 15' boat are comparable to those used on the O'day 26 and many other boats with 5-10x the displacement. My Catalina 22 has a much smaller pintle and the forces on the tiller are an order of magnitude greater.
Tyler Davis, CA M15 #157 "Defiant"
On Jan 9, 2015, at 11:54 AM, <jerry@jerrymontgomery.org> <jerry@jerrymontgomery.org> wrote:
Tyler- Kurt retired at least 20 years ago and I haven't had any contact for years. A good guy and a very smart engineer, as you would expect for a German. Wish someone was making the pintles; we'd consider using them on the upcoming Sage 15. They worked great and yours is the first one I've heard of that failed. I'm glad that RudderCraft is making something similar.
See you at Lake Pleasant.
Jerry
-- John Schinnerer - M.A., Whole Systems Design -------------------------------------------- - Eco-Living - Whole Systems Design Services People - Place - Learning - Integration john@eco-living.net - 510.982.1334 http://eco-living.net http://sociocracyconsulting.com