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Wan't to make 2 Domes is that possible

Started by moon2, 11/10/2018 10:00AM
Posted 11/10/2018 10:00AM Opening Post
Hello, 
I have a Shed with a sloping roof
is almost 5 Meters by 2 meters

can i put 2 DOMES on it is that possible

Is there someone with experience !!!!
wan't a nice dome not a Mickey Mouse dome 

thanks smile

POLAREX
Posted 11/12/2018 05:53AM #1
Hi Kiwi,

I do have some experience making domes, so I'll try to give the best advice I can. Of course, you can do it (build 2 - 2m domes), but first, there's a few questions along with my suggestions.

1) Why do you want two domes? Do you have two scopes, and there's no space for an additional dome? Will 2m be big enough for your current or planned scopes?
2) In what direction is the longer (5m) side oriented - N/S or E/W? Because having two domes next to each other WILL cut off part of the sky visible from each dome. That's an important consideration.
3) What is your budget? You can buy two commercial 2m domes, but that's pretty expensive. It's much cheaper to make them or to convert a hemispherical dome (or silo).
4) Make sure you can make very stable bases for your mounts, well sunk into the ground, and isolated from the observatory floor.
5) Now, my experience. I couldn't afford commercial domes, so I bought a 3m and a 6.1m hemispherical (architectural) domes made from galvalume panels from a company here in Canada specializing in those items. Fairly cheap. Not sure if similar things are available in the Netherlands. The main difficulty was in constructing the bi-parting shutters. If you go that route, I would make sure you have access to welding equipment. "Up and Over" doors are probably easier to fabricate, but I like the look of bi-parting shutters.

So, good luck. Hope it turns out well for you.

Cheers,

James Gort
Posted 11/12/2018 09:51PM | Edited 11/12/2018 09:53PM #2
Originally Posted by James Gort
Hi Kiwi,

I do have some experience making domes, so I'll try to give the best advice I can. Of course, you can do it (build 2 - 2m domes), but first, there's a few questions along with my suggestions.

1) Why do you want two domes? Do you have two scopes, and there's no space for an additional dome? Will 2m be big enough for your current or planned scopes?
2) In what direction is the longer (5m) side oriented - N/S or E/W? Because having two domes next to each other WILL cut off part of the sky visible from each dome. That's an important consideration.
3) What is your budget? You can buy two commercial 2m domes, but that's pretty expensive. It's much cheaper to make them or to convert a hemispherical dome (or silo).
4) Make sure you can make very stable bases for your mounts, well sunk into the ground, and isolated from the observatory floor.
5) Now, my experience. I couldn't afford commercial domes, so I bought a 3m and a 6.1m hemispherical (architectural) domes made from galvalume panels from a company here in Canada specializing in those items. Fairly cheap. Not sure if similar things are available in the Netherlands. The main difficulty was in constructing the bi-parting shutters. If you go that route, I would make sure you have access to welding equipment. "Up and Over" doors are probably easier to fabricate, but I like the look of bi-parting shutters.

So, good luck. Hope it turns out well for you.

Cheers,

James Gort

Kiwi
Thanks for mail James ...  just like the idea to have 2 dome,s  ... have a super beautiful 4inch telescope
off 102mm 1500mm,
my telescope friend is into old telescopes he says i have the nicest polarex telescope of the netherlands

yes think to make my self dome !!!! to keep the cost down, but I have expensive taste ,,,, hahaha ^_=

by the way you have a picture of your Dome
thank you James was fun and intrasand



Attached Image:

moon2's attachment for post 160299

POLAREX
Posted 11/12/2018 10:34PM #3
Really neat scopes, Kiwi. You're right - they deserve some nice domes.

I'm still in the construction phase. But I'll attach a photo of the 3m dome, sitting next to the observatory (also under construction).

Looks like you can only attach one photo - I'll respond two more time with more photos.

In the next message, the photo with the shutters installed is "photo-shopped". I wanted to see what it would look like! The scope is a 16.5cm 1880 Cooke.

Cheers,

James

Attached Image:

jgort's attachment for post 160301
Posted 11/12/2018 10:35PM #4
Message 2 -

Attached Image:

jgort's attachment for post 160302
Posted 11/12/2018 10:35PM #5
Message 3 -

Attached Image:

jgort's attachment for post 160303
Posted 11/14/2018 09:08AM | Edited 11/14/2018 09:18AM #6
Originally Posted by James Gort
Message 2 -
hi 

is that a silo dome
yes james you pull my strings 

ohhhh yes 16.5cm 1880 Cooke. super mooi  
is nearly 6/5 inch lens if I am correct

my telescope friend has 25 Meesters very super mooi
so cool can sleep neer your telescope ...hahahaha !!!! lol 

POLAREX
Posted 11/14/2018 07:02PM #7
Hi Kiwi,

Well - it's not quite a silo dome. It's an "architectural dome" from this Canadian company: http://demuth.com/domeroofs.php.

As I said before, they're fairly inexpensive, but not so easy to convert to a telescope dome - with bi-parting shutters.

I did a quick search, but couldn't find a comparable company in the Netherlands or even the EU. Hope you can.

Cheers,

James
Posted 11/15/2018 04:03PM #8
Originally Posted by James Gort
Hi Kiwi,

Well - it's not quite a silo dome. It's an "architectural dome" from this Canadian  company: http://demuth.com/domeroofs.php.

As I said before, they're fairly inexpensive, but not so easy to convert to a telescope dome - with bi-parting shutters.

I did a quick search, but couldn't find a comparable company in the Netherlands or even the EU. Hope you can.

Cheers,

James

thanks james
hahaha (^_=)/ will look for one. dome in netherlands

how did you find your cooke 1880 telescope 
and how manny did they make 
is it a rare telescope

thanks 
kiwi








POLAREX
Posted 11/15/2018 04:36PM | Edited 11/15/2018 04:45PM #9
The story is fairly interesting. On July 4, 2001, the Coventry and Warwickshire Astronomical Society (CWAS) in the UK placed an ad on Astromart for bids. I couldn't resist, so I gave a modest bid. But they got many bids, including one from Warwick University (where it was being stored). So I didn't hold out much hope.

The highest bid was apparently from a chap in the U.S. On September 13, 2001, he came back to his office from holidays - to find them destroyed in the World Trade Centre attack (Sept. 11). Many of his friends were killed. So he didn't follow up.

After much more negotiations, I finally won it - and it was delivered by Ocean Freight in December, 2002.

I don't know if it's rare or not. Some Universities have 6" Cookes. I believe the University of Toronto has one. Mine was donated to CWAS by Captain G.T. Smith-Clarke - https://www.gracesguide.co.uk/George_Thomas_Smith-Clarke

James