NewtonianReflector at Yahoo! Groups

Re: Best mirror cell design for large Newtonian prim...

Peter R — Sat, 21 Nov 2009 06:13:57 GMT

... Thank you Mick, This is really helpful. I will start with these documents as you suggest. I'm not in a hurry. I'm sure it will take 4 - 6 months to have

Re: Best mirror cell design for large Newtonian prim...

mhholl@... — Fri, 20 Nov 2009 23:36:56 GMT

Peter - I had a little time today so I gathered up some info for you that might help in your PLOP cell design for your 24 inch mirror: First, the URLs below

Re: Best mirror cell design for large Newtonian prim...

mhholl@... — Thu, 19 Nov 2009 20:52:53 GMT

In a message dated 11/18/2009 8:26:17 PM Pacific Standard Time, ... Peter - a picture being worth 1K words (according to legend), I have placed two pictures

Re: Jupiter in Oct 2009 from N. Calif.

mhholl@... — Thu, 19 Nov 2009 18:37:04 GMT

In a message dated 11/18/2009 8:03:54 PM Pacific Standard Time, ... Tim - thanks for the encouragement on the Jupiter images. These images are most assuredly

Re: Best mirror cell design for large Newtonian prim...

Peter R — Thu, 19 Nov 2009 04:26:05 GMT

... Thank you for the sobering assessment. Alas, I think you are right. So looking back to the "standard cell", how would one hold a 2-foot mirror laterally

Re: Jupiter in Oct 2009 from N. Calif.

Tim Kamel — Thu, 19 Nov 2009 04:03:40 GMT

retty impressive if you ask me. Are these individual shots or are they a stack? Tim ________________________________ From: "mhholl@..." To:

Jupiter in Oct 2009 from N. Calif.

mhholl@... — Wed, 18 Nov 2009 23:17:29 GMT

Group - I have placed three recent images of Jupiter (made using my homebuilt 10 inch f/6 Newt) in the Photos section, Mick Hollimon folder. These images

Re: Best mirror cell design for large Newtonian prim...

mhholl@... — Mon, 16 Nov 2009 21:40:34 GMT

In a message dated 11/14/2009 8:55:30 AM Pacific Standard Time, ... Peter - I finally got a chance to examine the sketch of the proposed 4-contact sling

Re: Best mirror cell design for large Newtonian prim...

john nassr — Sat, 14 Nov 2009 23:31:24 GMT

Peter, Rather than a full thickness mirror, consider a honeycombed mirror that weighs 60% less and is less demanding to properly mount. Had I realized this

Re: Best mirror cell design for large Newtonian prim...

Peter R — Sat, 14 Nov 2009 16:55:24 GMT

Hi Mick, I appreciate the insights on the hazards of slings, however I have not yet given up on the idea of a specialized sling system for an equatorially

Re: Best mirror cell design for large Newtonian prim...

mhholl@... — Wed, 11 Nov 2009 19:15:03 GMT

In a message dated 11/11/2009 7:20:05 AM Pacific Standard Time, ... Peter - I can certainly understand the concern about fully supporting a large mirror in

Re: Best mirror cell design for large Newtonian primary (24") on equ

Peter R — Wed, 11 Nov 2009 15:19:53 GMT

Thanks for the responses, Mick; I would absolutely use software (Plop) to design the cell support points, but the edge supports (and potentially forward

Re: Best mirror cell design for large Newtonian primary (24") on equ

john nassr — Fri, 06 Nov 2009 15:01:38 GMT

Peter, Using silicone glue "blobs" around 1" in diameter on each of the 27 flotation points of a mirror cell should properly hold a 24" mirror on an equatorial

Re: Best mirror cell design for large Newtonian primary ...

mhholl@... — Fri, 06 Nov 2009 06:28:31 GMT

In a message dated 11/5/2009 10:05:29 PM Pacific Standard Time, ... Assuming the "large, fast" Newt mirror is also thin (less than 6/1 width/thickness ratio),

Best mirror cell design for large Newtonian primary (24") on equator

Peter R — Fri, 06 Nov 2009 06:05:14 GMT

Hi all, My first posting to this group. I was interested in the opinion of others with respect to the best mirror cell design for a large, fast(f/3-4)