Nacra doesn't make beam end caps anymore. I have a Nacra 5.2 and need to make something work, Any ideas?
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Nacra 5.2
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Nacra 5. 2 beam end caps
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Posted: Jun 03, 2010 - 12:10 PM
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Posted: Jun 03, 2010 - 01:19 PM
murry's used to carry em' -
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Posted: Jun 03, 2010 - 01:32 PM
Not any more. I just broke one myself and they are hard to come by used. You may be able to modify a prindle end cap to fit if the beams are the same diameter. Might be a good project to get a machinist to do? If anyone wants to get a batch made out of aluminum I would be willing to kick in. Or if anyone knows of a supply...
The Nacra dealer in Aus makes boats they may have some?
edited by: Wolfman, Jun 03, 2010 - 12:34 PM
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Dave Bonin
1981 Nacra 5.2 "Lucile"
1986 Nacra 5.7 "Belle"
Winnipeg, Manitoba, Canada
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Posted: Jun 03, 2010 - 02:07 PM
Murray is out and they are the ones that told me. I am wondering about wood. Either turn them ona lathe or use a 4 inch hole saw out of marine plywood.
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Nacra 5.2
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Posted: Jun 03, 2010 - 02:12 PM
Wood would work, or even UHMW plastic if you have a lathe a router and the time. It might be an idea to check with the Brisbane Cat Center in Australia. They still manufacture boats so they may have a stock or manufacturer for those.
D.
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Dave Bonin
1981 Nacra 5.2 "Lucile"
1986 Nacra 5.7 "Belle"
Winnipeg, Manitoba, Canada
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Posted: Jun 03, 2010 - 06:20 PM
when i got mine it had no caps
i wanted to get some
but i find the hole in the beam 1 of the few places when i can grab the boat to lift it, so they wont be getting covered -
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Posted: Jun 03, 2010 - 08:04 PM
Prindle beams are tear drop shape, nacra beams are round.
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Posted: Jun 03, 2010 - 08:06 PM
Super Cat beams are round and they have alum end caps, but I am not sure they are the same size as nacras. Maybe worth finding out. -
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Posted: Jun 03, 2010 - 09:01 PM
I just redid my beam straps, and went over the 16-18 lb-ft of recommended torque by a bit, and it closed the slot in my front beam on both sides, so the totally rigged home made caps I had for the front no longer fit.
I think I'm going to try to make some out of west epoxy fairing compound. I wouldn't worry about it except that I cut my feet once every couple weeks on the rear beams.
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Rob
OKC
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Posted: Jun 03, 2010 - 09:47 PM
My 06 Murray's catalog has a nacra crossbar end cap Part # 56-3503. I did a search of the online catalog.... not there any more. -
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Posted: Jun 03, 2010 - 10:04 PM
I was just looking on youtube at how to make carbon fiber parts. mmm carbon fiber. End caps would be a good primer for foam and carbon dagger boards and rudders. Just have to figure out how to make a mold now...
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Dave Bonin
1981 Nacra 5.2 "Lucile"
1986 Nacra 5.7 "Belle"
Winnipeg, Manitoba, Canada
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Posted: Jun 03, 2010 - 10:27 PM
Guys, here's what I did with my 5.0....(5.0, 5.2, 6.0...all crossbeams are the same Dia.) go to your box lumber store, get a schedule 40 end cap for a 3" PVC pipe cut the lip off so the rounded end fits flush over the end of the crossbeam. Usually there is a line to follow where they moulded it. Next, take a 3" schedule 40 PVC pipe, cut 3/4" off for the new lip inside the crossbeam. Epoxy it to the cap and for added security I used thin screws of appropriate length. Make sure you cut a gap in the pipe to fit the tramp slot. What's cool is the PVC matches the color of the hulls, they're rounded and cost just a few bucks plus they look better than the black ones. Wish I had a picture but the boat is on Hobie Beach 60mi. from here. Maybe this weekend.
edited by: nacraman57, Jun 03, 2010 - 09:29 PM -
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Posted: Jun 03, 2010 - 10:49 PM
That sounds like an easier solution! Thanks Nacraman!
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Dave Bonin
1981 Nacra 5.2 "Lucile"
1986 Nacra 5.7 "Belle"
Winnipeg, Manitoba, Canada
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Posted: Jun 04, 2010 - 11:23 AM
My beams are 4 inch diameter and 3 7/8 inside diameter. I am having aluminum ones made (free). I will see how that goes. The pvc sounds good but his beams are not the same size as mine.
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Nacra 5.2
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Posted: Jun 04, 2010 - 12:38 PM
If the person making them wants to charge for them and a bit of business let me know. Aluminum ones would look badass and last forever!
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Dave Bonin
1981 Nacra 5.2 "Lucile"
1986 Nacra 5.7 "Belle"
Winnipeg, Manitoba, Canada
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Posted: Jun 04, 2010 - 02:16 PM
I will let you know how they come out. It is experimental at this stage.
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Nacra 5.2
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Posted: Jun 04, 2010 - 02:27 PM
How the heck did the censor on the site let me get away with badass? :)
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Dave Bonin
1981 Nacra 5.2 "Lucile"
1986 Nacra 5.7 "Belle"
Winnipeg, Manitoba, Canada
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Posted: Jun 06, 2010 - 10:15 AM
I picked up 3 used ones, & made the fourth out of a scrap of double thickness 3/4" plywood. I had some leftover epoxy from repairing my Invitation after some kids new to sailing ran out of water & ideas all at the same time. I mixed up a small amount, using only 1/2 the required hardener, & painted it onto all surfaces of the plywood. Due the reduced hardener, it took several hours to set up, but this allowed the epoxy to absorb into the wood grain. You have to keep turning the wood so as not to get "runs". The next day I applied a second thin coat, mixed at the recommended specs.
This worked very well so far. After the build, I weighed the plug on a scaled used for measuring powder charges,(I used to do a lot of shooting & reload my own rounds)accurate to tenths of a grain. I then let the plug soak in a bucket of water for 10 days, & weighed it again. The difference was not measurable within the scales margin of error, so it is water tight, for now. I forgot to paint the damn thing black, so it sort of stands out.
I also have some 5" x 3/4" strips of white HDPE. I may try turning some out of this material. It also floats, so you have a chance of recovery if you break a trap bungee & drop one in the drink.
The aluminum ones sound cool. When I saw the price at Murrays, $30, I decided that was way to much for a couple of pieces of plastic, & started scheming.
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Posted: Jun 06, 2010 - 11:05 AM
Cool, and the HDPE is less abrasive on the bungee. BTW, the end caps should be secured with a small SS screw into the beam.
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Philip
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Posted: Jun 06, 2010 - 11:39 AM
Make sure you have the end caps in place befor torquing the straps down. If you don't, there is a very good chance you will take the beams out of round (they will collapse) at 16 to 18 fpds and the end beam caps will not fit, even new ones.
Kevin-
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