Re: keel soft spot
Thank you for the updated pics and info..
Sorry.. I have been so swamped with everyone and there brother wanting to splash this weekend ( weather really took a part on such a short launching time ).
On to the repair..
Good inside grinding that I can tell .. as long as All the inside is prepped around the repair as seen in pic one of your updated pics ..
For these types ( and location ) of repairs..its recommended to do your OUTSIDE lams First. The outside should be the bulk of the repair..and the Inside should be for rivet affect bonding ONLY..
Basically you Grind and feather the Outside..for the main lams ( which seems you have )..then Scuff/grind the inside for backup ( which seems you have ).
Think of a bottle with a cork .. were is the pressure coming from.. from the OUTSIDE ( especially when your " repair " is on the keel ). The taper should be on the outside because its more structurally harder to push a 5 ply 10" lam Through your hull. .. but if your doing your bulk repair from the inside..well then your are only relying on one lam of 1.5 oz mat to bond the main repair on the back pressure side. I hope Im explaining this well.
Here is what I do..
1. Get some duct tape on the INSIDE to start making your form.. a few 3 layers of duct tape should make a good form base for the inside. You can tape down a strip of wood on the keel point to help form your inside ( Basically Form the inside ridged enough for you to glass and bubble roll the outside without pushing your form through ).
2. Glass your outside starting with 1.5 oz mat..followed with prewetted 1708 until its built up enough for you to grind/sand fair. If your grindout is feathered correctly you can do this in one shot..if not..you may have to lam 4 layers and STOP because the shape of the outside repair cannot be shaped to a regular concentric even shape for lams. Wait for it to kick off..grind a little more to debur and recut and glass some more..
3. After your first lam on the outside has been done..you can proceed to the inside lams. Starting with one 1.5 oz mat .. then layup 3 layers of 1708 .. Done.. ( You dont need to stagger cut the inside..just 1.5 oz mat 3 layers of 1708 ).
4. Grind/sand/finish your outside .. ( this is the tricky part which you can not explain in a forum..its just ..well a glass thing ).
Cant have too much acetone..or rags..or Full face respo ( if you cant get that then a respo and Goggles with 95% of them little holes taped up..) grinding suit..etc .. You should know the drill by now
..
YD.
PS. check your inbox.
