There's a small plane in my mast -- vrooooomm - Page 2 - SailNet Community

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  #11  
Old 11-25-2008
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loosen the boom! I had it sheeted too tight. Worked for me when i had the cessnas..
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  #12  
Old 11-25-2008
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kredit -- I'll try that.

Quote:
Originally Posted by badsanta View Post
whats mounted at the top if the mast? antenna, wind instruments? do they work?
Badsanta, here's a picture of the top of the mast.

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  #13  
Old 11-25-2008
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Mast hums can be a real problem. The C34 was notorious for this. Deck stepped masts are usually worse than keel stepped, and some models have it bad while an almost identical rig & model doesn't hum at all. Has to do with rig tension and wind direction (one theory is that mast groove is the culprit).

If you note tall, thin smokestacks the modern trend is towards spiral vanes to cause the wind to "turbulate" a bit rather than set up a harmonic. You can get some of this effect by wrapping the halyard around the mast below the lowest spreader. This doesn't help much with multiple paired spreader rigs.

It's also a question of owners.

"Doesn't that bother you?"

"Doesn't what bother me?"

"That humming."

What humming?"
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  #14  
Old 11-25-2008
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Top looks fine. I had an electronic wind speed and direction that did not work well and was making a hum. After replacing, it was fine. It had degraded from sun and bird, part broken and unbalanced. Just a thought.
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  #15  
Old 11-25-2008
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Brad,
I tied off your Lazy Jack lines to the mast 'tabernacles' when I was last on your boat. Perhaps these small lines are creating a harmonic noise when the wind is whipping up. I was trying to quiet the lines on the mast by bringing them away from it but it is possible the Lazy Jack lines are making some noise in the wind. I also did not like that the slack in the Lazy Jack lines was trying to wrap around the main halyard.
How are you making out with the Jabsco head pump that you removed (at great nasal cost I might add) from the boat?
Do you have an idea of when Brewer's is planning on hauling your boat? I could arrange to be there if you can't.

CalebD
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  #16  
Old 11-25-2008
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Sentry Multi Stage 'SM' series battery charger. I can't remember the rest of the mnemonics you came up with.
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  #17  
Old 11-26-2008
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Caleb,

the mast was makng the noise before we started the winter takedown. It's defiinitely somthing under tension. And it's quite loud when the wind hits the mast at an angle off the bow. I'll call you about the other things.

Regards
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  #18  
Old 11-26-2008
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Quote:
Originally Posted by Bene505 View Post
Bubb,

Did you make a bracket for your boom, or do you just let the boom rest in the cockpit? Or maybe you are only letting it out an inch.

Regards
Bennie,
Since you said that this doesn't happen at anchor. If you loosen the topping lift under sail (really should be anyway), the sail will hold the boom up and out of the cockpit. Then just tighten it again before dropping the main.

Michael
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