I''m looking for a hub system like the starplate one, any one know of any thing better. Problem is i live in the UK and am finding it hard to find any one from this side ot the water that knows anything about dome construction. Any help would be appreciated.
[ Comments 6 ]
The only way, short of importing from the states, is to make your own or perhaps have them made by a local engineering firm or blacksmith. Starplates are great for 1v structures but not too useful for any other dome frequency as the plates axial angles will be 32 degrees. All the info you really need to make hubs is right here but if not..you only need to ask ;)
I couldn`t help but grin when you said "finding it hard to find any one from this side of the water that knows anything about dome construction".
The site admin, Paul and myself are in the UK :)
sorry for the stupid comment about this side of the water, was getting bit disspondent from lack of info from other sources, glad found your site. I think hub system seems a bit complex trying to make hubs yourself, think it might be easier for me doing panels can you help with the mitre and bevel angles for a 3v 3m diameter dome.
Sorry ment to be a2v dome still with a 3m diameter.
Tubular hubs are quite easy to make yourself. A panel dome is a lot more involved and any mistakes can potentially waste large pieces of material. You will still need to fix the panels together in some way. As i recall the 2v panel angles are listed "somewhere" on the site but if not..no problem :)
The size of your proposed dome seems a little on the small side, a 3m diameter 2v will only be 5ft high, perhaps you meant 3m radius? The 40 panels required (3m dia 2v) would be about 3ft on a side so you might get 3 panels per 8ft x 4ft sheet. As a comparison, a 6m dia (3m high) 2v hub & strut might need a maximum 3m length of tube for the hubs and 35x 3.5m lengths of timber for the struts with minimal waste. You`d still need to cover it with something though so its all swings and roundabouts :)
Here`s a copy/paste of the 2v panel angle info. These relate to the panel drawings on the 2v calculator page: The dihedral angles for "Y" panels (10 equilateral triangles) are all 11 degrees with 60 degree vertex angles. The dihedral angles for the "X" panels (30 pent triangles) are 11 degrees for the "A" sides and 7 degrees for the "B" side, vertex angles are 55.6 degrees for the "B" (long) side and 69 degrees for the vertex at the apex of the (short)"A" sides.