Re: [ATM] need ides to reinforce my struts

[Steve Vegos <astro@rvi.net>]

I hate to mention this, but beer cans make good, thin shim material.

Steve
Oregon

RP Sutton wrote:
> Hello All -
> 
> a few weeks back I wrote in about the poles on my 3 -pole DOB flexing. With the 
> help of other list members, we have come up with an idea to try before we 
> convert it to a std 4 truss (8 pole) design.
> 
> The flexure seems to be coming from the gap between the ID of the mirror box 
> holes that the poles go into and the OD of the poles themselves. The poles pass 
> thru the mirror box top and thread into a stud located about 6 inches into the 
> box. There is a difference of .10 inches between the ID of the holes and the OD 
> of the poles. This allows the poles to flex quite a bit.  We are going to try to 
> "sleeve" the bottom 12-24" of the pole with a piece of aluminum or steel tubing 
> that will slide over the poles and eliminate the gap between the mirror box and 
> the poles. The Poles have an OD of 1.25 inches and the mirror box holes have an 
> ID of 1.35 inches.
> 
> Any ideas where I can an get the sleeves, how close to the ID of the sleeves can 
> be to 1.25 (the OD of the poles). and what they should be made of? 
> 
> As always, thanks to everyone for their help and ideas -
> 
> RP
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