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Old 05-29-2013, 10:42 PM   #15
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We have a 2004 Damon Ultrasport that we bought new to us last year. On our way back from a trip to San Antonio last summer ours started doing the same thing. There was a loud whistle that would start at around 50 mph. It did not really change pitch with increased spree but would stop when we would slow below 50. Sounded like when you blow across the mouth of a soda bottle. Took our rig to the shop and found out that the left edge of the drivers side windshield had popped out of the rubber gasket. After much adjustment and LOTS of sealant we are so far noise free. Good luck finding out the cause of your noise. The DW and I know how annoying it can be....
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Old 05-30-2013, 08:27 AM   #16
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Join Date: Mar 2009
Location: N. Central AZ
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Had the same problem on my rig. After reading other post on this site I used a bungee cord stretched on the back of the grill. Change the mass and rigidity of the grill and the harmonic noise @ 55-60 mph is no longer a problem!

'01 National RV Tropi-Cal, Ford V10, '01 Suzuki GV 4X4 Blue Ox Tow Bar,300 Watts Solar, 2500 Watt '458' Inverter, NO TVs, Most light fixtures upgraded to LEDs

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