Re: ATM Truss tube vibrations - cloth jackets

[PK6811S@ACAD.DRAKE.EDU]

>Anything that is "PACKED" into the tube will not dampen the vibrations 
>completely, it will simply change the frequency. You need to have relative 
>motion between the tube and the dampening material so that the energy is 
>...

Popcorn and cranberries on a string come to mind.

Maybe rubber balls with diameter slightly smaller than tube ID,
strung with irregular spacing on a string.  Or wooden beads.

Paul Kline
pk6811s@acad.drake.edu