Re: ATM Truss construction with additional strings

["A. Suykerbuyk" <asuyker@wxs.nl>]

I used the same system last summer when building a 16" scope.
I am using just two strings (inner cables of a bicycle brake) opposite each
other. The system is very light weight and works fast. Hopefully the cables
will remain strong enough.

Regards,
Adrie Suijkerbuijk.

-----Oorspronkelijk bericht-----
Van: Martin Cibulski <martin.cibulski@t-online.de>
Aan: atm-digest@shore.net <atm-digest@shore.net>
Datum: donderdag 2 januari 2003 2:46
Onderwerp: ATM Truss construction with additional strings


>
>Currently I'm building the mechanical parts for my 14" scope.
>The tube will have 8 trusses. Instead of fixing the 16 ends
>of the trusses with clamps or screws I added four strings.
>Their tension will put the trusses under pressure and so fix them.
>
>A drawing of one truss triangle between the upper ring and the
>mirror box can be seen at:
>
>http://martin.cibulski.bei.t-online.de/truss_triangle_with_string.jpg
>
>The construction is easy to build because I don't need any truss clamps.
>Setting up the truss tube after transport requires fixing of only four
>screws.
>
>The stiffness should be the same compared to the usual 8 truss construction
>without the string. The string is actually not responsible for the
>stiffness. It
>only must have enough tension to put always both trusses under pressure.
>
>Best regards,
>Martin
>
>