Re: [ATM] [atm_free] Re: Paper tube?

["Ukyo Chen" <ukyochen888@hotmail.com>]

Yes I worry about that, Kevin suggest me to wrap with fiberglass and it will 
be good enough then.

Best Regards,
Ukyo Chen


>From: Aki Lötjönen <aki.lotjonen@phnet.fi>
>Reply-To: atm_free@yahoogroups.com
>To: Ukyo Chen <ukyochen888@hotmail.com>
>CC: atm_free@yahoogroups.com, atm@atmlist.net
>Subject: [atm_free] Re: [ATM] Paper tube?
>Date: Mon, 12 Sep 2005 21:47:35 +0300
>
>Hi Ukyo,
>
>Paper tubes are normally ok if you also make it little bit stronger by
>gluing, for example, a thin plywood around it. I installed a small
>Dall-Kirham Cassegrain optics in that kind of tube (paper tube wall
>thickness 4 mm, plywood 2 mm) and it works quite ok. If your wall
>thickness is only 1 mm, it sounds pretty thin to me.
>My LHN telescope has now a PVC plastic tube which I'll definetely change
>to another type...
>
>Regards,
>Aki Lötjönen
>
>
>
>
> > Hi list,
> >
> > I am working on the tube for the coming 127mm LH system lenses.
> > I had thought about to use Aluminium tube but the cost of material and
> > manufacture 1 set is too high, so I turned to paper tube now, not sure 
>if
> > normal industrial paper tube is strong enough for a such aperture like
> > 127mm. Existing industrial paper tube can be offered in some diameters 
>like
> > 125, 135mm and the thickness should be 1mm. Also they are very cheap, I 
>can
> > easily rebuild one if something failed.
> > Thanks for any sugguestion.
> >
> > Best Regards,
> > Ukyo Chen
> >
> >
> > _______________________________________________
> > ATM mailing list http://www.atmlist.net/
>


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