Re: ATM Truss tube vibrations - fluid dampers?

["Jim Miller" <jim@jtmiller.com>]

i'm just buying carbon fiber poles.  stiff enough to ensure frequency and
amplitude of oscillation is not an issue.

jtm
----- Original Message -----
From: "Tom & Lou Krajci" <krajcit@3lefties.com>
To: <atm@shore.net>
Sent: Thursday, August 23, 2001 10:52 AM
Subject: ATM Truss tube vibrations - fluid dampers?



I know some of you may be sick of this thread....but Doug Tanaka mentioned
something to me that may get me to do more tinkering.  He has a string
damper on his tennis racket...essentially a small fluid filled chamber
(somthing viscous like oil?), an air bubble, and a ball bearing.

I may get a small pill bottle, fill it with 30 weight oil, and BB's, and
clamp it to various parts of a truss tube for testing.  Perhaps this may be
a more space/weight efficient way to dampen truss tube vibrations than ropes
or cloth jackets?

Has anyone tried this?

Thanks in advance,
Tom Krajci