"Stephen Bird" wrote in message
...
On Mon, 12 Mar 2001 23:38:10 GMT, Wilko wrote:

I tried wrapping the bars with string. It helped but not enough.
I'll probably end up with black pipe insulation, attached with
wire ties. I hate the looks of duct tape.

Duct tape is ok on black pipe insulation if you can find black duct tape.

I used tie wraps (brand name?) to keep foam pipe insulation on the
vertical pipes on my roofrack, that really helps keep the noise down
(well, as long as I stay under 120 mph on the Autobahn, that is... :-)).

My thought, instead of wire tie wraps (which, I think, would have to be
cut
off and replaced if I need a flat rack surface), is to use nylon straps to
hold the pipe insulation in place as needed. I'm thinking of such straps
sold in camping or automotive departments...

I tried both string & foam without luck. I still got a constant pitch howl
that became louder with speed. Then a banged a bar while carrying it &
realized that it's ring was the same pitch as the howl. It was a bell &
that was it's resonant frequency. So I filled the bars with sand. They are
heavy, but the noise is gone.

Lloyd Bowles
www.madcanoeist.4ever.cc