1 frequency icosa picture

It is most important to build these models in order otherwise it is like trying to learn to roller skate in a buffalo herd. Earlier we talked about Chord factors. For a 1 frequency, which is the basic Icosasphere this factor is 1.05 To use it multiply the chordfactor times the radius of the sphere to get the chord length (Radius is 1/2 the diameter). For our model we will be building a 19" diameter sphere (this is approximate in order to make the cutting measurements come out even).

So for our example 19.05" dia./2 = 9.525 radius 9.525 x 1.05 = 10.00125 or round down to a Chord length of 10"

WHAT YOU WILL NEED:

Do not use these drawings as patterns. They are not to scale. They are for reference only.

INSTRUCTIONS:

There are 2 methods of making the first model (or 1 frequency).

Method I

Layout cardboard to match the figures. You will need 1 of figure A and 2 of figure B. Add in dotted lines - layout each triangle. Make sure to measure and cut as accurately as possible to make the best looking models. CUTTING: Only cut around the outside of the figs. After doing this cut along dotted lines - But only cut half way through. This will allow the pattern to bend on the dotted line like a hinge. Limber it up a little but only fold in one direction. Bring the two ends of figure A together and hot glue in the shape of a cylinder. Glue the edges of fig B into a cone shape, and then glue on top of the cylinder A glue the other on the bottom and then you're done!

FIG A (method I)
FIG B (method I)

Method II

Layout cardboard to match the figures. You will need 1 of figure C. Add in dotted lines - layout each triangle. Make sure to measure and cut as accurately as possible to make the best looking models. CUTTING: Only cut around the outside of the figs. After doing this cut along dotted lines - But only cut half way through. This will allow the pattern to bend on the dotted line like a hinge. Limber it up a little but only fold in one direction. Bring all the edges together and hot glue.


FIG C (method II)

ON TO THE 2 FREQ MODEL....

Home Prices/Estimates Plans DIY plans Links News Dome Basics FAQ Contact Raisings/Pictures Dome Video Dome Models

New Exciting DVD

2 full hours, featuring 3 dome raisings and in shop fabrication. Make payments with PayPal - it's fast, free and secure!