Using Extruded Aluminum to telescope.

[WizardOfAz]

Hi Al
You mentioned experience building vertical antennas - knew you must be an amateur radio op. I'm Bill Bennett, N7DZ, licensed since '68, originally WB8ALU in Cincinnati.

This is my third year with Team 1011 in Tucson. We're working on a telescoping arm design using a 2.5 x 1.25 tube inside a 3 x 1.75 tube. Plan to only have rollers at the bottom outside of the inner tube and the top inside of the outer tube. Have never done any kind of telescoping arm before, so we're out on thin ice here....

Also working on a design to PUSH the telescoping section, and a sliding apparatus inside it, up from the bottom using spring steel push tape, along the same idea as electrician's fish tape. No cables or chains. Hope we can get it to work...

Any comments or suggestions about this from Al or anybody would be welcomed.

Bill