PS - this is a pennant for the heavy cast iron keel version M17! Not the lightweight newer one. In case I wasn't clear... thanks, John S. On 10/27/2016 10:49 AM, John Schinnerer wrote:
Thanks all for the feedback on this.
I expect I'll find a bulky knot in the fat pennant line when I lower the board...I'd be happy to just get it down to half an inch. As it is, with the trailer I have, the rear roller is behind the keel/CB when the boat is fully on the trailer. In shallow launching situations where the stern isn't deep enough to float off the bunks, the CB protrudes enough to catch on the roller and stop the boat sliding back off the bunks.
What is recommended or best options for pennant line replacement? It has some kind of one-color double braid on it now, pretty fat, 3/8 I would guess without going and measuring it.
Definitely interested in knots & usage. Not a lot of major references to the figure eight hitch, but I found a few. I know the "regular" figure eight well from climbing/mountaineering but hadn't heard of the hitch version. One video on figure eight hitch says "for light duty" and "not the most secure knot" but obviously it's worked for you David. It would be under tension all the time if used for the CB so in that case I think it would be pretty secure. If alternately slack and tight, I can see how it could slowly loosen itself in some situations.
cheers, John S.
On 10/26/2016 09:14 PM, David Rifkind wrote:
On Oct 26, 2016, at 8:59 PM, John Schinnerer <john@eco-living.net> wrote:
...speaking of keels and bunks and rollers, a question on the M17 centerboard. This is a '74 so it's the heavy cast iron CB.
When fully up, should it be flush with the bottom of the keel? Mine will not go up quite that far. The rear end protrudes about 1 to 1 1/2 inches.
I think it is because there is a rather thick pennant line, and I don't know what knot or fastening setup was used but I'm guessing the knot is long/fat, bulky, double, etc. - in short, taking up space that leaves the CB hanging out that inch-plus.
I can see the top of the pennant knot hard against the underside of the pennant hole in the CB trunk - it is as far up as it can go.
At some point this winter I hope to get the boat situated so I can lower the board down and see what's up and maybe improve the situation.
But should I expect to be able to get the CB up flush with the trunk?
Mine does too. Not an inch and a half, not even half an inch, but it’s not flush and on the rollers the centerboard makes contact and not the keel. And there’s a small gap at the joint that I epoxied, so probably a little more protruded before it sprang.
My pendant is very thin (6mm single-braid Vectran) and I put some work into figuring out the smallest secure knot (a figure-eight hitch, if you care) so I don’t think there’s much wasted space in there.
-- 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