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| Nacra mainbeam and dolphin striker #138502 03/31/08 03:36 PM 03/31/08 03:36 PM | Anonymous
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Unregistered | I have recently reassembled the main beam on my Nacra 5.8. The original mast bolt was bent and needed replacing. I need to know how to tension the striker and what torsion should the main beam have. Anyone know? | | | Re: Nacra mainbeam and dolphin striker
[Re: ]
#138503 03/31/08 08:14 PM 03/31/08 08:14 PM |
Joined: Dec 2006 Posts: 2,490 On the Water P.M.
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Posts: 2,490 On the Water | According to the factory, 3/8 inches of prebend on the front beam.
Philip USA #1006 | | | Re: Nacra mainbeam and dolphin striker
[Re: P.M.]
#138504 03/31/08 08:19 PM 03/31/08 08:19 PM | Anonymous
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Unregistered | Thanks for the reply mummp.
Where did you get that information? Since I am reassembling the cat, I would find that source valuable.
How would you measure a prebend of 3/8"? | | | Re: Nacra mainbeam and dolphin striker
[Re: ]
#138505 03/31/08 11:12 PM 03/31/08 11:12 PM |
Joined: May 2002 Posts: 217 jcasto1
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Posts: 217 | Make a straight line from end to end of crossbeam, without mast in place. The ends of crossbeam should be lower than middle by amount of prebend.
Jim Casto NACRA 5.5 & NACRA 5.7 Austin TX Lake Travis
| | | Re: Nacra mainbeam and dolphin striker
[Re: ]
#138506 04/01/08 08:50 AM 04/01/08 08:50 AM |
Joined: Dec 2006 Posts: 2,490 On the Water P.M.
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Posts: 2,490 On the Water | Tobin, Keep it simple, with no load on the beam your beam should be level and/or "straight", then simply screw the lower nut up 3/8 in. and then tighten your upper nut. Just curious, after you straightened the rod, did you put a compression tube back inside the beam? If you did I hope you marine greased the snot out of it. . .
Philip USA #1006 | | | Re: Nacra mainbeam and dolphin striker
[Re: P.M.]
#138507 04/01/08 03:23 PM 04/01/08 03:23 PM | Anonymous
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Unregistered | I didn't, but i reassembeled it just a week ago and haven't tightened it yet. Where should I grease the snot out of it? And why? | | | Re: Nacra mainbeam and dolphin striker
[Re: ]
#138508 04/01/08 04:58 PM 04/01/08 04:58 PM |
Joined: Apr 2007 Posts: 291 JACKFLASH
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Posts: 291 | Where the stainless sleeve comes into contact with the aluminum crossbar due to electrolosys (sp) that will occour there.
Collin Casey Infusion Platform + C2 rig and rags = one fast cookie
| | | Re: Nacra mainbeam and dolphin striker
[Re: JACKFLASH]
#138510 04/01/08 06:24 PM 04/01/08 06:24 PM |
Joined: Dec 2006 Posts: 2,490 On the Water P.M.
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Posts: 2,490 On the Water | . . . . and also the inside of the compression tube.
Philip USA #1006 | | |
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