So it's nothing to worry about? My history is with swing keel boats where people generally fix this, but a short ~40lb centerboard clunking against a large contact surface is very different than an 800lb centerboard with a 6 foot pivot arm clunking against a tiny contact surface. I was just thinking it would be possible to use g/flex epoxy to bind some HDPE (cutting board material) strips to the centerboard, creating a tighter fit. I've had good luck binding HDPE to fiberglass if it's flame treated with a torch, and glued with g/flex (made for adhering to plastics). If done lengthwise and fitted perfectly, this could also create a sort of rigid gasket at the centerboard opening, reducing turbulence and drag. I've heard centerboard gaskets improve sailing performance. Tyler Davis, CA M15 #157 "Defiant" On Sep 16, 2014, at 11:28 AM, Dave Scobie wrote:
'clunking' is normal when the boat is not 'driving' (in light winds). all the boats (M15, M17, S17) do this. raise the board a few inches, putting more board in the truck, can help 'quiet the board'.
-- :: Dave Scobie :: former M15 owner - www.freewebs.com/m15-named-scred :: M17 #375 SWEET PEA - www.m17-375.webs.com