Re[2]: SV: Re[2]: ATM Truss tubes - 4, 6, or 8?

[Dwight Elvey <elvey@hal.com>]

lindberg <lindberg@olywa.net> wrote:
> 
> Dwight:
>       Cables could be 1/16" galv. steel. Ultimate strength about 550 lbs.
> Stainless somewhat less. BUT...You"ll need cable end fittings, shackles,
> bolts or pins, and turnbuckles ($$$) or some sort of over-the-center
> tensioning device. Hmmm...money and weight. Each cable assembly could
> outweigh an aluminum tube, easily. To make a truly rigid truss, I think
> you would need 4 longitudinal tubes and a total of 8 wires. (Cris-cross
> in each bay.) Then, there is the rigging of a tangle of cables everytime
> the scope was assembled. It would be a little different every time
> because cable is stretchy. Sounds like rigging an old biplane. No
> thank-you. 
>       Steve.

Hi Steve
 I agree. I was just noting that there are other ways
to support things that didn't require all solid pieces.
It was more to keep an open mind.
Dwight