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Old 13-01-2008, 02:35   #1
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cat stern bumpers

after getting one hull graunched on a stone quay when stern -to mooring in a crosswind last summer i am trying to find some sort of material to make two permanent bumpers for the sterns that can be epoxied on , up to 200mm thick, any ideas ?
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Old 13-01-2008, 09:25   #2
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You won't get anything to hold with epoxy. You would need through bolts with backing plates.

I would just buy some big fenders and attach long lines to them that can be tied on. They could be used in many situations like when you have a heavy crosswind. They could take a bigger hit than a hard bumper would too. Add a few extra cleats if need be. Fenders take abuse by their nature and they get dirty and scratched up. You sure don't want to have two ugly bumpers years down the road looking pretty ugly.
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Old 13-01-2008, 12:43   #3
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Maybe you could attach a dock bumper of some kind??



http://www.scalisemarine.com/logos_p...boxes/df01.jpg

I'm not promoting this vendor but just showing an example.
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Old 13-01-2008, 19:49   #4
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What about a couple of fenders and a board (on the DOCK side of the fenders) on each hull strategically located to properly carry the load?
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Old 13-01-2008, 20:50   #5
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How about some stainless steel plates?

They use them for keel protection on beachable cats. Figure they would do for your purpose too. Still want a bumper, but it'd hurt the wall not the boat if you bump.
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Old 14-01-2008, 13:59   #6
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I was planning on trying a pair of these:
West Marine: Transom Fender Product Display

Mark.
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Old 14-01-2008, 14:39   #7
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Quote:
Originally Posted by mark_morwood View Post
I was planning on trying a pair of these:
West Marine: Transom Fender Product Display

Mark.
Nice idea but they won't deal with all configurations of dock. The only graunch I've had was about 18 inches above the bottom of the transom and was caused by contact with the underside of a pontoon.
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Old 16-01-2008, 02:46   #8
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You won't get anything to hold with epoxy. You would need through bolts with backing plates.

I would just buy some big fenders and attach long lines to them that can be tied on. They could be used in many situations like when you have a heavy crosswind. They could take a bigger hit than a hard bumper would too. Add a few extra cleats if need be. Fenders take abuse by their nature and they get dirty and scratched up. You sure don't want to have two ugly bumpers years down the road looking pretty ugly.
yes thats what i always do - but the fenders float and the transoms are raked forward so the fender just lifts out of the way when most needed ! i want to fix a soft-ish fender / buffer to the hulls so they will remain in place when the pressure is on .
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Old 16-01-2008, 02:51   #9
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[quote=mark_morwood;125751]I was planning on trying a pair of these:
West Marine: Transom Fender Product Display

yes, thanks i looked at these , best so far - but i suspect they would be tricky to position and keep in place with cord ?
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Old 16-01-2008, 04:38   #10
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Quote:
but the fenders float and the transoms are raked forward so the fender just lifts out of the way when most needed ! i want to fix a soft-ish fender / buffer to the hulls so they will remain in place when the pressure is on .
I guess I see what you mean but an permanently attached fender is just going to eventually get dirty, ugly, and all beat up. Probably develop a hole along the way too. Being soft like a fender means it will get dirty just like a fender and wears like one too. If they don't then they won't do any good. I don't have a fender older than 1 year that looks very great but they still work as well.

You could add tie downs that were through bolted with backing plates so you could tie on a fender any place you wanted, but be able to remove it and replace or just clean it as required. You won't destroy the look of the boat that way either. Now you can use general purpose fenders that are easily replaced. Having a pool of general purpose fenders makes it easier to use them for more situations.
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Old 16-01-2008, 09:27   #11
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Might sacrifice a little speed, but have you considered cutting the transom closer to square? Or adding a set of beefy, well backed up stainless steel hand rails on the outer edge that are 90 degrees to the water?

Could you use the transom steps to lace a big taylormade buoy on to the back?

I've also seen swim platforms that were strong enough to take load while docking... though that would be heavy enough to lift the bow out of the water.
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Old 16-01-2008, 12:01   #12
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I'd nail a couple of the dock fenders to the dock pilings and an potential rub spots, going way above and below the water line. don't forget rubrails on the walkways under underside supports, anything that could rub. That would be a first solution because you can just nail it on and be done with it.

Not having that as an option I'd look at a rub rail for the transom. A proper rub rail will look nice on your boat and you could hide the mars and gelcoat chips from past incidents.

Maybe something like these RubRails.com - Your online source for rub rails, bilge supplies, boat cleaning supplies, and other boating accessories
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Old 21-01-2008, 02:19   #13
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Looking for something skookum (NW speak for big or stout,) try Schuyler Rubber Company, Inc.
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Old 21-01-2008, 02:24   #14
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Stern fender

And if that's a little too industrial, try SSR Fenders - Marine Fenders
(no connection to either)

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Looking for something skookum (NW speak for big or stout,) try Schuyler Rubber Company, Inc.
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Old 21-01-2008, 03:34   #15
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I'm sure with a little work this cat can look like a tug boat. Might look ugly but it won't get scratched. BigCat, I think your fender idea lacks the steel behind required for this to really work.
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