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!
| Strut | Strut factor | Dome | 3/8th | 5/8 | Sphere | Image |
|---|---|---|---|---|---|---|
| 1V Dome | ||||||
| A | 1.05146 | 25 | 30 |  |
||
| 5-way connectors | 6 | 12 | ||||
| 4-way connectors | 5 | 0 | ||||
| 2V Dome | ||||||
| A | .61803 | 35 | 60 |  |
||
| B | .54653 | 30 | 60 | |||
| 4-way connectors | 10 | 0 | ||||
| 5-way connectors | 6 | 12 | ||||
| 6-way connectors | 10 | 30 | ||||
| 3V Dome | ||||||
| A | .34862 | 30 | 30 | 60 |   |
|
| B | .40355 | 40 | 55 | 90 | ||
| C | .41241 | 50 | 80 | 120 | ||
| 4-way connectors | 15 | 15 | 0 | |||
| 5-way connectors | 6 | 6 | 12 | |||
| 6-way connectors | 25 | 40 | 80 | |||
| 4V Dome | ||||||
| A | .25318 | 30 | 60 |   |
||
| B | .29524 | 30 | 60 | |||
| C | .29453 | 60 | 120 | |||
| D | .31287 | 70 | 120 | |||
| E | .32492 | 30 | 60 | |||
| F | .29859 | 30 | 60 | |||
| 4-way connectors | 20 | 0 | ||||
| 5-way connectors | 6 | 12 | ||||
| 6-way connectors | 65 | 150 | ||||
| 5V Dome | ||||||
| A | .19814743 | 30 | 60 |   |
||
| B | .23179025 | 30 | 60 | |||
| C | .22568578 | 60 | 120 | |||
| D | .24724291 | 60 | 120 | |||
| E | .25516701 | 70 | 120 | |||
| F | .24508578 | 90 | 120 | |||
| G | .26159810 | 40 | 60 | |||
| H | .23159760 | 30 | 60 | |||
| I | .24534642 | 20 | 30 | |||
| 4-way connectors | ?? | 0 | ||||
| 5-way connectors | 6 | 12 | ||||
| 6-way connectors | ?? | ?? | ||||
| 6V Dome | ||||||
| A | .1625672 | 30 | 60 |   |
||
| B | .1904769 | 30 | 60 | |||
| C | .1819083 | 60 | 120 | |||
| D | .2028197 | 90 | 180 | |||
| E | .1873834 | 30 | 60 | |||
| F | .1980126 | 60 | 120 | |||
| G | .2059077 | 130 | 240 | |||
| H | .2153537 | 65 | 120 | |||
| I | .2166282 | 60 | 120 | |||
| 4-way connectors | ?? | 0 | ||||
| 5-way connectors | 6 | 12 | ||||
| 6-way connectors | ?? | ?? | ||||
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
