|
|
Post by Ron Walker on Apr 20, 2022 19:14:33 GMT -7
|
|
|
|
Post by Ron Walker on Apr 20, 2022 19:15:07 GMT -7
Posted by: Ken Miller Nov 9 2010, 08:46 AM QUOTE(zemt @ Nov 8 2010, 06:18 PM) * Hi, i will make a new dome, 4m diameter, in a old barn. so, i think to use a armature like my 3 m dome yves.lhoumeau.pagesperso-orange.fr/astronomie/diffusion/animation/planetarium/3m/page3AE.htmbut, for the couverture, use sheets of aluminium (5/10 mm), fixed with rivets is there a guy who has already built an aluminum dome? Yves LSS-team www.lss-planetarium.ovh.org/index.php?lang=en&menu=projector&page=homeYves We love barn domes on this forum. I just wish I had a barn! How will you get the get the aluminum to conform to a spherical shape? If the aluminum would take on a spherical shape, you wouldn't need the frame. Greg Nuckolls is the only one that I personally know that made a metal dome. He used a geodesic design to build a 5 meter dome out of sheet metal. He and I assembled it once about 4 years ago, and put on an impromptu star show using my Spitz model A projector. It worked well as long as the stars were stationary. When they were in motion they kept making angular changes in direction as they crossed the seams. We're always looking for good dome designs, keep us informed of your progress. |
|
|
|
Post by Ron Walker on Apr 20, 2022 19:15:34 GMT -7
Posted by: Ron Walker Nov 9 2010, 11:08 AM
If I ever get my "barn" built it will also have a geodesic dome. While I try to trick myself into believing that I could be happy with it, I'm sure that I won't be. At that point I will be thinking about a round inner shell. I will be most interested in following your progress.
|
|
|
|
Post by Ron Walker on Apr 20, 2022 19:16:01 GMT -7
Posted by: zemt Nov 10 2010, 05:02 AM
hello,
I hope in the coming days to show you a replica in aluminum (diameter: 80cm)
I don't want to use the geodesic structure, there are too many folds
0,5 mm aluminum sheet are quite "flexible" and may even be cut with scissors. So if I can make the model, I think the realization, with a frame, be possible
yves
|
|
|
|
Post by Ron Walker on Apr 20, 2022 19:16:28 GMT -7
Posted by: Ken Miller Nov 10 2010, 08:32 AM
QUOTE(zemt @ Nov 10 2010, 04:02 AM) *
hello,
I hope in the coming days to show you a replica in aluminum (diameter: 80cm)
I don't want to use the geodesic structure, there are too many folds
0,5 mm aluminum sheet are quite "flexible" and may even be cut with scissors. So if I can make the model, I think the realization, with a frame, be possible
yves
Yves
One half millimeter thickness makes sense. I misinterpreted your dimension; I thought you were talking about five millimeter material. Please keep us posted about your results.
|
|
|
|
Post by Ron Walker on Apr 20, 2022 19:16:45 GMT -7
Posted by: zemt Nov 10 2010, 02:59 PM
yes a dome with 5mm thickness, would be very heavy !!!
in my study, the dome would weigh less than 60 kg
|
|
