Table of Contents

Geodesic Dome Concepts
2V/L2 Icosahedral Dome Concept
The plans for this dome can be found here. The concept was built using toothpicks and a hot glue gun. The length of each strut was normalized to the length of one toothpick, meaning that the longest strut was a toothpick in length, the second longest was a certain percentage of that, et cetera.
Dome Parameters
From the website mentioned above, the following parameters for the dome were found: Vertices/connections: 26
 10 x 4way
 6 x 5way
 10 x 6way
 Edges/struts and bending angles
 A x 30: 0.54653 (15.86^{o})
 B x 35: 0.61803 (18.00^{o})
 Total: 65 struts (2 different kinds)
 Strut variance of 13.1%^{1}
 Faces: 40 (3sided)
 AAA x 30 (55.57^{o}, 55.57^{o}, 68.86^{o})
 BBB x 10 (60.00^{o}, 60.00^{o}, 60.00^{o})
 2 different kinds of faces
 Diameter: 2.000, radius: 1.000
 Height: 1.000 or 50.00% of diameter
^{1}The variance is the percent difference between the longest and shortest struts. The lower the value, the better.
Dome Construction
Using the provided dome calculator at the website mentioned above, the following strut lengths were obtained. It should be noted that the strut lengths were normalized such that the longest strut is a toothpick in length. Strut A: 0.8843 (23/16 in.)
 Strut B : 1.0000 (29/16 in.)
Comments
Some things learned from building this dome concept:
 Has a very rigid structure.
 If expanded to full scale, the various strut orientations would allow for easy location of mounting points for the LED clusters.
 When compared to the 3V octahedral dome, this dome is larger in size while using only five more struts.
A rough estimate of manufacturing time to construct this dome concept would be between 80 and 105 minutes based on the estimates listed below.
 Time to prepare struts (counting, measuring, and
cutting):
 2030 minutes
 Time to assemble struts into dome:
 6075 minutes
 Total time required:
 80105 minutes
3V Octahedral Dome Concept
The plans for this dome can be found here. The concept was built using toothpicks and a hot glue gun. The length of each strut was normalized to the length of one toothpick, meaning that the longest strut was a toothpick in length, the second longest was a certain percentage of that, et cetera.
Dome Parameters
From the website mentioned above, the following parameters for the dome were found: Vertices/connections: 25
 4 x 3way
 9 x 4way
 12 x 6way
 Edges/struts and bending angles
 A x 16: 0.45951 (13.28^{o})
 B x 20: 0.63246 (18.44^{o})
 C x 24: 0.67142 (19.62^{o})
 Total: 60 struts (3 different kinds)
 Strut variance of 46.1%^{1}
 Faces: 36 (3sided)
 AAB x 12 (46.51^{o}, 46.51^{o}, 89.98^{o})
 BCC x 24 (56.20^{o}, 61.90^{o}, 61.90^{o})
 2 different kinds of faces
 Diameter: 2.000, radius: 1.000
 Height: 1.000 or 50.00% of diameter
^{1}The variance is the percent difference between the longest and shortest struts. The lower the value, the better.
Dome Construction
Using the provided dome calculator at the website mentioned above, the following strut lengths were obtained. It should be noted that the strut lengths were normalized such that the longest strut is a toothpick in length. Strut A: 0.6844 (112/16 in.)
 Strut B : 0.9420 (27/16 in.)
 Strut C: 1.0000 (29/16 in.)
Comments
Some things learned from building this dome concept:
 Has a less rigid structure when compare to the 2V/L2 icosahedral dome.
 If expanded to full scale, the various strut orientations would allow for somewhat difficult location of mounting points for the LED clusters.
 When compared to the 3V octahedral dome, this dome appears to be far less "elegant".
A rough estimate of manufacturing time to construct this dome concept would be between 100 and 120 minutes based on the estimates listed below.
 Time to prepare struts (counting, measuring, and
cutting):
 3040 minutes
 Time to assemble struts into dome:
 7080 minutes
 Total time required:
 100120 minutes
General Comments on Dome Concepts
After completing the two dome concepts, the following was found:
 The domes are not too difficult to assemble.
 The most labor intensive part of manufacturing time was counting, measuring, and cutting the struts to their desired lengths.
 As the number of different strut lengths increases, the complexity of the dome increases as does the manufacturing time.