whats the best way to put new bunk boards on a macgregor 22 how do you get the bend in the board ??
bunk boards
- Thread starter slowdog
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- Dec 25, 2009
- 269
Simplest way to to bend wood is to laminate thin vaneers 1/8" or so around a form and glue up with wood glue or epoxy. I made some spoon blades for oars that were 5" wide and 3/8" thick (3 layers of 1/8" each) bent around a corresponding plywood mound that had a male curve and a female curve and the vaneers were pulled into shape using clamps and make sure that you use
- Dec 25, 2009
- 269
pardon the computer burp. use...wax paper to keep the molded parts from sticking to the molds.
Male/Female Blade Mold Ready for Clamping
Open
Male/Female Blade Mold Ready for Clamping
Open
Check this forum. I think you just leave them strait and let the boat curve them.
http://forums.macgregor.sailboatowners.com/showthread.php?t=146630
There is a guy with rollers too...?
http://forums.macgregor.sailboatowners.com/showthread.php?t=146630
There is a guy with rollers too...?
- Dec 25, 2009
- 269
Sorry, I misunderstood what you were referring too. I put new ones on this year for my American, I used Treated wood with a carpet wrap. They were straight. When I loaded the boat on them the first time, believe me, they bent very easily. I just left the center hold down loose until the boat was loaded and then tightened the bolts.
Next time I launched, they were bent and had no desire to straighten out.
Next time I launched, they were bent and had no desire to straighten out.
I too replaced mine as Tom did. The bunks formed to the weight of the boat and worked just fine. I got my carpet (very high quality) for the dumpster behind the carpet store.
Tom, Professionally done!pardon the computer burp. use...wax paper to keep the molded parts from sticking to the molds.
Male/Female Blade Mold Ready for Clamping
Open
stan
HEINZIR
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- Jan 22, 2008
- 198
The supports at the ends of the bunks on my trailer have slots for the bolts instead of round holes. I'm guessing that most sailboat trailer bunks that have a substantial amount of bend are mounted the same way. Be sure that the bolts are NOT tightened all the way. They should be free to move in the slot. When the weight of the boat comes on the bunks and bends them, the ends will be pulled inward as the middle bows down. If the ends are rigidly pinned instead of free to move slightly you run the risk of the bunks breaking. Use lock nuts or Locktite to keep the nuts from vibrating off.
As a former smalll boat dealer, I would purchase treated 2X4 or 2X6 Lumber. I would go with the ends sticking at least more than a foot beyound the furtherest bunk board stands. The boards would be bollted to the center supports first. With the boat lowered onto the boards, they would bend down. Once the boards touched the outer supports, I would then mark the holes to be drilled. I would lift the boat up and out of the way and then drill the holles and bolt the rest down. I always raised the center supports first to ensure proper support. Be very careful that you do not raise the outer supports to cause the end of the boards to raise upwards into the hull.
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