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RE: BSA Telescope `lookalikes`

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Posted by Mike OConnor on October 21, 2000 07:20:38 UTC

(Mircea e-mail me at ) this is a telescope making topic I`m looking to build a grinding machine capable of producing a 25-30" mirror.

when built I will start small with a 6" get some glass/pyrex experience. (I have a 10" dob now so there is no rush for this project.)

I did find a double machine capable of a 12 or 14" mirror.and wondered if I would need more power?

In the double grinder he used a 1/4 hp elec motor..connected to a 20:1 gear-box..and still further reduced the RPM by the use of pullies

Will this motor be sufficient to turn a 30" piece of glass?

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