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"Wayne Harrison" wrote in message .com...
i have a jeep cherokee, with which i cartop a 14' royalex mad river adventurer. i use the oe bars, with two nylon ratchet straps across the body of the boat. the boat itself is supported by foam attachments against the bars. i have tried "twirling" the straps, using various tensions on the tie downs--and nothing works. above 40 mph, this ceaseless, loud droning noise permeates the car's interior. surely there is some simple solution. after all, when i left the dealership with the boat on top, i drove about 75mph for an hour to my destination without a sound--and the damn straps were absolutely flat. help! or do i just pop for those thule thingies...? wayno Wayno, have you tried setting up the straps both around the boat and around the roofrack in such a way that there is hardly any place where the straps are not touching anything? I find that straps are only causing sound when they can vibrate, i.e. when there is air on both sides of the straps and when the piece of strap able to vibrate is long enough. Therefore (when carrying only one or two boats at the same time) I always try to tie the boats top down, so that the straps lie against the entire underside and sides of the hull. Then the only place where they could vibrate is between the boat and the roofrack, and by carefully placing the straps around the roofrack, you can usually limit the distance that they have to be unsupported. HTH. Wilko |