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Equipment Discussions >> ATM, Optics and DIY Forum

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don clement
Vendor (Clement Focuser)


Reged: 02/02/11

Loc: Running Springs, California
Re: Ball Scope Project--Source for 22-24" sphere new [Re: kfrederick]
      #5925590 - 06/17/13 01:50 PM

R.W. Porter's drive concept in May 1930 for the ball mount of the proposed 200"



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astrobug
member
*****

Reged: 10/31/06

Loc: Portland, OR
Re: Ball Scope Project--Source for 22-24" sphere new [Re: don clement]
      #5941612 - 06/26/13 03:22 PM

Sorry to take so long in getting back to the thread I started. Thanks for all of the great ideas. The spherical composter idea is perhaps the most intriguing, but the reviews from people using it as a composter say it doesn't roll too smoothly, so I'm doubtful that it will work as a telescope mount. Anyhow, I think I need to make some phone calls to local places that do metal/plastic/fiberglass and see what I can come up with.

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careysub
Carpal Tunnel
*****

Reged: 02/18/11

Loc: Rancho Cucamonga, CA
Re: Ball Scope Project--Source for 22-24" sphere new [Re: astrobug]
      #5942097 - 06/26/13 08:43 PM

Quote:

...The spherical composter idea is perhaps the most intriguing, but the reviews from people using it as a composter say it doesn't roll too smoothly...




This could be because it is partly filled with a heavy wet plant mass that makes it grossly weighted off-center (piled up in the bottom) no matter what you do, not because it is not round (but that might also be the case).


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AlphaGJohn
super member
*****

Reged: 06/12/13

Loc: Wasatch Front, Utah
Re: Ball Scope Project--Source for 22-24" sphere new [Re: careysub]
      #5942871 - 06/27/13 10:41 AM

Amazing drawings, Don. Thanks for posting those !

John


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neotesla
Pooh-Bah
*****

Reged: 11/18/10

Loc: Canada
Re: Ball Scope Project--Source for 22-24" sphere new [Re: AlphaGJohn]
      #5943081 - 06/27/13 01:03 PM

20" but probably would need to be reinforced...

http://www.1000bulbs.com/category/white-acrylic-globe-lamp-covers-with-opening/

found this link in this article...

http://www.sff.net/people/j.oltion/Astroscan.htm


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