New (old) boat!
Posted 18 September 2012 - 04:58 AM
After a year and a half without a boat and several months of boat shopping we've bought Red Witch #328 at auction. I've owned several boats inmy life but this is the first one I ever bought. The Red Witch is a local design (Perth Australia) that was built from the early 70's into the early 80's.
From the looks of this one it's probably an early 70's boat (I'm still trying to decode the hull ID number). I might have to do a little bit of structural repair on the inside of the boat. It would consist of cutting a partial bulkhead out and replacing it. My first question (of many) is what do I use to make the repair? I don't know if this early- or mid-70's boat is polyester or vinylester or something else. Will epoxy stick to it, or do I need to do more research on the original resin so I can use the same stuff?
Posted 18 September 2012 - 05:08 AM
Posted 28 September 2012 - 04:02 PM
Congrats on the purchase. As I've always understood it, you can lay epoxy onto well-cured polyester, but not the other way around. You just want to make sure you rough up and clean the surface thoroughly to get a good bond. It may be worth doing a little research just to make sure it's polyester or epoxy to begin with. If it's vinylester, then I don't know if epoxy will work.
Core Sound #102 "Second Wind"
Posted 28 September 2012 - 06:54 PM
1967 Pearson Renegade "Hirilondë"
Spindrift 9N #521 - many KudzuCraft SoF kayaks
Posted 29 September 2012 - 02:44 AM
I've got most (2/3) of the cutting out of the damaged bulkhead done so I'll be re-doing it probably next weekend.
The mast is in the hands of a professional and it looks like once I've paid him for welding the two pieces back together (a clean break right at the spreaders) and welding up the broken tabernacle, we'll be on the water. Well have less than $3k into this boat by the time we go for the first sail
I will, of course, post pictures of the work and once I'm on the water I'll post some sailing pics. I'll have to rely on Capt Oyster for the good fish pictures, though, since I haven't been catching anything this winter.
Posted 29 September 2012 - 04:16 AM
Both vinylester and polyester could be used, but they aren't as easy, nor as strong as epoxy in the mechanical bonds you ask of them. Epoxy will stick to all of the resin systems used. Vinylester is next on the list, though not as good as epoxy, with polyester being considerably further down the list in regard to bond.
BoteCoat is a good choice and will have no trouble bonding with your boat. There's no such thing as a single part epoxy. Products sold as a one part epoxy are usually polyurethane with some portions of an epoxy molecule in it, so they can call it epoxy on the label. If you read the label carefully, you'll find polyurethane in there.
Welding aluminum extrusion usually produces a weaker mast. Will they be "sleeving" the mast at the break?
The fin under that boat dates her to the 70's, as it was popular then to incorporate "shark's fin" style of appendages. She'll probably be a pretty quick ride. They have an impressive ballast/displacement ratio, especially for it's era (designed in '72). She'll be a witch upwind.
Posted 29 September 2012 - 04:20 AM
Posted 07 October 2012 - 07:27 AM
Posted 08 October 2012 - 09:58 PM
I've verified that the hull has flotation tanks built in, so the occasional upside-down sail won't become a long distance swim.
Posted 10 October 2012 - 03:47 AM