[amsat-bb] 70 cm Lindenblad progress - notable support structure for parasitic elements

[Zach Metzinger]

On 09/22/20 19:44, Curt Laumann via AMSAT-BB wrote:
> Over the past few months I've been designing & assembling a few 70 cm
> Lindenblads.  The current version is shown in the attached picture (link
> below).  Arrow shafts are used for parasitic elements.  The shafts are
> bonded in place with fiberglass resin.  Rubber end caps (from McMaster)
> cover the shaft ends.
> 
> The notable part of this design is the central structure (supporting
> parasitic elements) is 3D printed as *one part*.  Virtually all of the
> angles and spacings are achieved in the 3D printing process.  After
> struggling to align and bond various PVC and irrigation parts in other
> versions, it was a breeze to assemble this design:  one nylon machine
> screw, one nut, four bonding points.
> 
> The design could be easily modified to accommodate 0.125 inch diameter
> parasitic elements as well.

Hello Curt,

It appears you and I had the same thought.

Look for an upcoming article, already submitted, in the AMSAT journal 
about my design. The OpenSCAD source files and STL files will be available.

--- Zach
N0ZGO