Re: [ATM] Aluminium or stainless steel?

["Bob May" <bobmay@nethere.com>]

Yep, at the ultimate stress, putting those disks in will improbe the yield
strength of the axis but that isn't the problem in this application but
rather the small scale flexing of the material is what the problem that he
will run into.  The telescope, in other words, isn't going to fall off of
the shaft but rather it will tend to constantly vibrate about like a tuning
fork and produce poor images as a result of the vibrations.
I think that you know that that little weight on the end of that big tube
won't cause any permanent deformations of the tube unless something large
falls on it - something which will be rather catastropic as the rest of the
scope will also be destroyed!
Bob May
bobmay@nethere.com
http://nav.to/bobmay
http://bobmay.astronomy.net

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