First of all, you need this simple formula:
dome radius = strut length/strut factor
which is the same as:
strut length = dome radius * strut factor
Now all you need are the strut factors!
Equations for Calculator
- Circumference = π 2r
- Area of a circle = π r2
- Surface area of sphere = 4 π r2
- volume of a sphere = (4/3) π r3
Angles
The bending angles are as follows:
1v dome: bend 32º on each end
2v dome: bend A’s 18º, and B’s 16º on each end
3v dome: bend A’s 10º, B’s and C’s 12º on each end
4v dome: bend all struts 7º-9º on each end
5v dome: bend all struts 6º-7º on each end
6v dome: bend all struts 5º-6º on each end