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Equipment Discussions >> Observatories

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Starhawk
Space Ranger
*****

Reged: 09/16/08

Loc: Tucson, Arizona
Rotating Building Observatory new
      #4487298 - 03/31/11 04:56 PM

Has anyone seen such a thing? I am imagining just having a sliding door continue up to become a slot. The whole building would rotate, so it would be non-obvious as an observatory when closed.

-Rich


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Galaxyhunter
Carpal Tunnel
*****

Reged: 01/02/06

Loc: Northern Illinois
Re: Rotating Building Observatory new [Re: Starhawk]
      #4487786 - 03/31/11 08:04 PM

I can't remember where but YES I have seen such an animal. IIRC, he had a seat mounted to the wall that would rotate also.

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StarWrangler
scholastic sledgehammer


Reged: 09/03/04

Loc: Three Rivers, MI U.S.A>
Re: Rotating Building Observatory new [Re: Starhawk]
      #4487826 - 03/31/11 08:25 PM

Yes,

Do a Google search for Merry Go Round Observatories.


Alan


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gravitino
sage
*****

Reged: 04/28/09

Loc: Evanston, IL
Re: Rotating Building Observatory new [Re: StarWrangler]
      #4488386 - 04/01/11 01:22 AM

Try the June 1991 "Gleanings for ATM" column in Sky and Telescope. Bill Volna describes a little shed observatory that seats two, with an exterior 6" f/10 achromat. The whole building rotated; the article had nice outlined plans, as well as a concept for a much larger scale building based on the same concept.

Clear skies,
-- shane


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StarWrangler
scholastic sledgehammer


Reged: 09/03/04

Loc: Three Rivers, MI U.S.A>
Re: Rotating Building Observatory new [Re: gravitino]
      #4488828 - 04/01/11 09:22 AM

Hey Shane and all,

Yes Bill Volna's Set up is one of the best I've ever seen.

And heated too!!!!!!!!!!

Alan


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THEPLOUGH
ELEVEN Grandchildren; FIVE Ducklings
*****

Reged: 01/11/08

Loc: Carlisle, Cumbria, ENGLAND
Re: Rotating Building Observatory *DELETED* new [Re: StarWrangler]
      #4490072 - 04/01/11 07:13 PM

Post deleted by THEPLOUGH

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gravitino
sage
*****

Reged: 04/28/09

Loc: Evanston, IL
Re: Rotating Building Observatory new [Re: THEPLOUGH]
      #4490113 - 04/01/11 07:55 PM

I just did a quick Google search on Bill Volna, and turned up a site with a few pictures (at "Volna Engineering"). The observatory is portable, and looks like it has been taken to the SOUTH POLE! :-)

http://www.volnaengineering.com/obser.php

Clear skies,
-- Shane


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THEPLOUGH
ELEVEN Grandchildren; FIVE Ducklings
*****

Reged: 01/11/08

Loc: Carlisle, Cumbria, ENGLAND
Re: Rotating Building Observatory new [Re: Starhawk]
      #4490166 - 04/01/11 08:33 PM

Quote:

Has anyone seen such a thing? I am imagining just having a sliding door continue up to become a slot. The whole building would rotate, so it would be non-obvious as an observatory when closed.

-Rich






See here..... linky........ Hope this helps....


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Starhawk
Space Ranger
*****

Reged: 09/16/08

Loc: Tucson, Arizona
Re: Rotating Building Observatory new [Re: THEPLOUGH]
      #4491098 - 04/02/11 10:57 AM

No, these are very different from what I was proposing. I'm not suggesting a ride-on alt-az mount.

I am talking about an alternative to both a roll-off roof and fixed buildings with domes on top; sort of an extension to the concept where the scope is still mounted on an equatorial mount, but the entire building rotates to put the slot in front of it. To think of it another way, the dome goes all the way to the ground, and I am imagining doesn't look very different from a small storage building. Unlike a roll off roof, it doesn't need an overhang area as big as the building. Unlike a dome, it doesn't stick up and say, "Hey! This is unusual. Maybe there is something to steal, here!"

-Rich


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Starhawk
Space Ranger
*****

Reged: 09/16/08

Loc: Tucson, Arizona
Re: Rotating Building Observatory new [Re: Starhawk]
      #4491109 - 04/02/11 11:06 AM

This is funny- Google this subject and you get THIS THREAD as one of the top results.

-Rich


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Mary B
Vendor - Echo Astronomy and Electronics
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Reged: 05/21/10

Loc: Minnesota
Re: Rotating Building Observatory new [Re: Starhawk]
      #4492311 - 04/02/11 09:51 PM

I have seen several pictures up in the picture thread with square buildings with roofs that rotate.

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Starhawk
Space Ranger
*****

Reged: 09/16/08

Loc: Tucson, Arizona
Re: Rotating Building Observatory new [Re: Mary B]
      #4493220 - 04/03/11 11:00 AM

Yeah- what I am thinking is not having the roof move would be nice. The floor of an all- rotating observatory gets to be a little peculiar with rotating and having a non-rotating center. This is a little bit like what surrounds the MMT or the LBT observatories, but on small scale.

-Rich


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astroelliottuk
member


Reged: 11/27/08

Re: Rotating Building Observatory new [Re: Starhawk]
      #6147957 - 10/20/13 07:16 AM

Bit of an old thread i know

But a total rotator observatory construction is described in reg spry's book make your own telescope .But using my own design.
I intend to construct one to house my 16 inch fork mounted newtonian .Easier to construct than a dome uses a full size walk in door and will have more wind protection than a roll off roof i don't need full sky access either as i am a visual obser of moon and planets .


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1965healy
The Snarkster
*****

Reged: 06/23/07

Loc: San Antonio, TX
Re: Rotating Building Observatory new [Re: astroelliottuk]
      #6147990 - 10/20/13 08:26 AM

Rotating a square building can lead to some interesting challenges. Do you build a rotating platform that the building sits on? If so you need a very stable platform and a very rigid structure. You'll also need a means to rotate it, bearings or wheels and a circular race or track for them to ride on/in. How are you going to turn it? By hand, a motor? Wood is heavy, light weight metal or plastic may not be rigid enough. Since it will probably be at ground level you need to keep debris out of the mechanism and keep the building from being entered by either bugs or the elements like water, dirt or wind. The concept would demand an interesting solution. Keep us posted please!

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tim57064
Pooh-Bah
*****

Reged: 08/23/12

Loc: Southeast South Dakota,USA
Re: Rotating Building Observatory new [Re: 1965healy]
      #6147998 - 10/20/13 08:37 AM

I could not imagine trying to rotate the entire building,unless it was fairly small.
I can see that if you were using a chain drive with geared motor of some sort,it might work.
Yet the central cog would have to be fairly substantial would it not and have a fairly large bearing for smooth operation.
It would be an interesting build yet I do not think easier than a Roll Off Roof OBS.


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Starhawk
Space Ranger
*****

Reged: 09/16/08

Loc: Tucson, Arizona
Re: Rotating Building Observatory new [Re: tim57064]
      #6148446 - 10/20/13 01:34 PM

I got to see the Large Binocular Telescope 2 weeks ago- it's a large rotating square building. I can at least report on this thread what I have learned:

Wheels- I've found general purpose wheels which would be better for this than V-groove because you can use them on parallel tracks without overconstraining one: Garden raiway wheels:

http://www.cannonballltd.com/trucks_cat.html

http://www.cannonballltd.com/products_img/pt43206.jpg

The track bolts down flat for straight applications (like roll off roofs), so the need to learn welding is eliminated. It's aluminum so it won't rust or react with wood:

http://www.cannonballltd.com/products_img/pt43206.jpg

However, it can't be bent into as tight a radius as a small building would need, so it sounds like what is needed is 1/2" flat stock to bend in a circle with a three point jig.

The small building I am imagining would have a door which was also the lower shutter, with a sliding roof panel. The power for the building would come up through the circular non-moving center floor with the mount, and it would be controlled like a dome.

-Rich


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ScottW
super member


Reged: 05/05/05

Re: Rotating Building Observatory [Re: Starhawk]
      #6149049 - 10/20/13 08:24 PM

Rich,
Sky & Telescope, Sept. 98

It's a round building with a walk through door/slot that rotates on a brick circle.
Looks straight forward as far as construction.
I can get a copy of the article if you can't fine it in a week or two, just let me know.

Scott


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Starhawk
Space Ranger
*****

Reged: 09/16/08

Loc: Tucson, Arizona
Re: Rotating Building Observatory new [Re: ScottW]
      #6149576 - 10/21/13 10:19 AM

Argh, that would be one which went after the local book exchange passed on first dibs.

I've been interested in something square, with the idea being to make as much of it as possible in multiples of the standard stock dimensions for the raw materials. For example, walls in multiples of 4' so sheet materials could be used without trimming and the math would work out- something folks could build without a kit or lots of difficulty.

-Rich


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