Re: ATM Can one use 0.035" wall-thickness truss tubing?

[Redwad <redwad@telebyte.net>]

Carl,
   I use 1 1/4", .020" wall on my 20 inch f5. The secondary cage
w/diagonal and JMI-2 eyepiece holder weighs 9 pounds. Been ok for the
past five years.
---Redwad.


Carl Woebcke wrote:
> 
> Hello out there,
> 
>       Anybody have any experience OR educated guesses with 0.035" wall
> thickness, 1.0" OD Aluminum (6061-T6) tubing?  How will this thin a wall
> behave over 5' lengths on an 18" ultra-light Dob?  Haven't yet
> calculated the total weight on the upper end, but I think it'll max out
> at around 12-15 lbs.
> 
> Sincerely,
> 
> Carl Woebcke
> carlw@telis.org