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Hi Drew, Dave, and Floyd, The 7 hex arrangement is by farm my favorite. I've felt that the main reason for going to tessellated mirrors was that the glass...
Ed Rice, President CTS Cement Dear Ed, I've been working with John Ridgely (ME Prof. at Cal Poly) and others on the design of a 1 meter telescope that will be...
Hi Matt, Thanks. Very helpful! If you don't mind, could you give me the contact information on your field rep? I'd like to discuss with him a bit further....
I think the precision milling idea is great, no sag under the glass no irregular glue under the glass. An idea floated by the group is no adhesive just...
Dave, I only have the 3" hexagons so it will be 10" diameter. Working on the facet cuts. They is very tricky to model up correctly Actually, I have a wet ...
The silvering kit I bought came from Angel Gilding in Chicago. It is a complete kit with chemicals and tools. Cost delivered was 149.95. They can be reached at...
Hi David, Howard, and Greg, One never knows where things might lead. A bit of time spent this morning looking into precast concrete pipe and related things....
Hi All, I'd like to contact some Seattle area amateur astronomers to track down some that might have access to surplus aluminum honeycomb paneling from Boeing ...
Hi All, At SAS/RTMC, Joe and I discussed using electrostatic forces to correct thin film "pneumatic" mirrors. I was working on editing the pneumatic mirror ...
Did I miss something ???? Who is messing with silvering ???? Drew From: AltAzInitiative@yahoogroups.com [mailto:AltAzInitiative@yahoogroups.com] On Behalf Of...
Hi Dave, Work is progressing on the 1 meter photometric telescope. I look forward to seeing you later this week and the first optical tests on the 1 meter ...
Hi All, Below is a picture of a test blank of a tessellated primary made by Andrew Arigema and being shipped off to David Davis for optical grinding, ...
Hi Arne, Thanks very much. Per your suggestion we'll go with five degrees in our control system analysis for the short "flyswatter" moves for the 1 meter ...
Hi Don, Thanks very much for your input. Hi torque will certainly help, and for that reason I'll be using SiTech's new control system that Dan is currently ...
Hi Mike, I'm heading down to PlaneWave Instruments tomorrow to take a fast peak at the 1 meter mirror and bring it back here. We could test up your way at ...
Hi Dave, Howard, Craig, John, and Dan, Here is a possibility for direct drive in altitude I have been considering. On one side of the OTA one has a pillow...
Hi Dave, Thanks for your email. I called up Andy Young and had a nice chat. He made several key points: ** The wavelength dependence is very small and for...
Hi All, Nice input below from Andy Young. Encouraging on near IR photometry. I called Gene Milone at Calgary and left a message. Cheers, Russ In a message...
Hi Chuck and All, A couple of control system questions: The focal ratio of the 1 meter telescope is f/4, so the “optical tube assembly” is over 4 meters...
I have been working on a history of automatic telescopes. I have scanned some of the references from the 1980s, with the permission of the editor / publisher...
Hi All, Below is first go at finite element analysis of the Hex Foamglas-backed tessellated primary mirror by a friend of Andrew. Units are inches, so the ...
Hi All, Excellent discussion below of the FEA by Dave and Andrew. Cheers, Russ Hi Andrew, There is an important complication when dealing with mechanical...
Hi Andrew, On your 7 hex tessellated Foamgals backed mirror FEA results, one thought immediately comes to mind, and that is I don't see any reason that the ...
Hi All, Below is an interesting source of wheels used in elevators and other applications that could be used for azimuth wheels. Cheers, Russ Russ, I finally...
Russ, We wanted to show the worst case model. Taking away any support material concentrates the loads and deflects the materials the most. Remember that this...
Hi Drew, The built up Foamglas structure (or cored out structure) would certainly be worth investigating. I do think that it would be worthwhile (for ease of...
Hi All, Good discussion on the Foamglas FEA. Cheers, Russ John, The foam is the only thing being analyzed. There is no glass plate on the top or bottom of...
Scheduled Maintenance:
We are undertaking some essential, but extensive maintenance to improve Yahoo!
Calendar. Your Group Calendar is being migrated to a much improved version of
Yahoo! Calendar. During the maintenance period, you may not have access to your
Groups Calendar.
We sincerely apologize for this inconvenience. Your Groups Calendar is in great
shape and we are working to have it available again as quickly as possible
- Yahoo! Groups & Yahoo! Calendar Team
