I can't see a problem with the board bearing on the top of the trunk- there's a lot of glass there, and the load is really spread out. I wouldn't worry about it. -----Original Message----- From: John Schinnerer Sent: Friday, October 28, 2016 3:05 PM To: For and about Montgomery Sailboats Subject: Re: M_Boats: CB retraction on M17 Thanks Jerry, David, Tom, et al for the info & thoughts. There's definitely some force on the CB/Hull connection if the CB is doing something other than resting just its own weight on bunk or roller on trailer. In my case I'm concerned it may be pushing up against top of trunk, if the roller is too high/hull bunks too low And makes sense, as Jerry says, if it's hanging on pennant while on trailer, then it's yanking on whatever the pennant is fast to. One is compression, other is tension, neither what it was designed for so neither probably good in the long run. cheers, John S. On 10/28/2016 01:26 PM, Thomas Buzzi wrote:
It would seem that since the trunk rests on the inside of the hull that any weight suspended inside of the cb trunk would of necessity put the joint between the cb trunk and hull under compression.
On Fri, Oct 28, 2016 at 2:49 PM, David Rifkind <drifkind@acm.org> wrote:
One other thing for nobody’s interest. I think that when the boat rests on the centerboard on the trailer that it essentially hangs from the roof of the centerboard trunk, and this may have something to do with the fragility of the keel-trunk seam, putting it in tension when it’s otherwise in compression. (Or did I say this already?)
-- 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 -- I am using the free version of SPAMfighter. SPAMfighter has removed 14864 of my spam emails to date. Get the free SPAMfighter here: http://www.spamfighter.com/len Do you have a slow PC? Try a Free scan http://www.spamfighter.com/SLOW-PCfighter?cid=sigen