How to work out the angles in 2V domes?

[NStocks]

Hi,

Sorry if I'm posting in the wrong thread, but it's for a design project 😛

I have made a 2V dome out of cardboard and up until now I've not needed to know the angles of each triangle.

I'm now trying to make it out of wood so that I can cast a mould, but obviously wood won't bend like cardboard does so I need to know the angles of the dome elements.

I've searched on google but it's not very clear how you work it out.

The Isosceles triangles is : Longer side 92.7mm and the shorter 81.97mm

The equilateral triangle is 92.7mm on all edges.

I realise this is somewhat specialised but I thought I'd give it a try... you never know !

Thank you

 

[Designer Dale]

Will something like this help?

http://www.desertdomes.com/dome2calc.html

Dale

 

[NStocks]

Will something like this help?

http://www.desertdomes.com/dome2calc.html

Dale

Yeah, I saw that earlier thanks. I have just re-created part of the cardboard model and laid the wood onto that. It's looking fairly good so far !

Nathan

 

[NStocks]

Well, here it is. The picture doesn't quite show the finish that I achieved... which is a very smooth surface; 3 coats of paint and a lot of sanding!

My tutor was also pleased with it so i expect a good grade 😀

Nathan

 

[Designer Dale]

Well, here it is. The picture doesn't quite show the finish that I achieved... which is a very smooth surface; 3 coats of paint and a lot of sanding!

My tutor was also pleased with it so i expect a good grade 😀

Nathan

Outstanding! I was hoping to see the end product of your work. Very nice.

Dale

 

[NStocks]

Outstanding! I was hoping to see the end product of your work. Very nice.

Dale

Thank You !

I'm experimenting with other materials such as aluminium and plastics too, but these are for different models. I can't say how much I enjoy model-making, it's far more satisfying that sketches and I can alter the designs to take on new features which is what design is all about. I'm also becoming a little more familiar with CAD which will be heavily required in the next project.

Nathan