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Post by sail39ds on Jun 12, 2009 2:51:30 GMT
Reaching with wind speeds above 10-12 knots produces a whistling sound, loudest in the head and aft main cabin and audible on deck too. I can't identify the source. Anyone have any ideas?
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SteveT
Full Member
Posts: 34
Jeanneau Model: SO 50DS
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Post by SteveT on Jun 12, 2009 7:52:21 GMT
Are you sure it's a wind noise. My 39DS produces a 'hum' when sailing at 4.5 - 5.0 knots. I've put this down to a high frequency vibration of the rudder at thse speeds. It could be mistaken for wind noise. If anyone knows how to cure this it would be appreciated.
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Post by jdathena on Jun 12, 2009 10:30:14 GMT
try to loosen the topping lift . the wind makes it vibrate and the boom amplifies the sound. I got rid of the noise in my boat
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Post by sail39ds on Jun 18, 2009 5:06:37 GMT
Thanks for the replies. As to the topping lift as a potential source, not possible since when the main is unfurled from the mast the topping lift is always slack.
As to possible rudder involvement, it seems unlikely since the noise is airborne-no wheel or vessel vibration. We're still looking!!
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Post by MartyB on Jun 18, 2009 6:13:14 GMT
This sounds like you have in mast furling?!?!?! Could the noise be from the opening in the mast? or other equal style opening that is getting wind blown across it, as you would a bottle to get sound/noise?
Marty
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Post by dublin on Jun 18, 2009 20:34:39 GMT
the amount of pre bend in the mast means that the backstays must be left relatively loose as tightening them creates too much bend for the inmast system to work. If left too loose then when broad reaching the leward backstay becomes very slack and will "flap" which could be the source of the noise.
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Post by sail39ds on Jun 24, 2009 2:36:55 GMT
I think Marty is on target. So far, however, I have not been able to isolate the source of the noise. I'll keep trying to block openings.
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