Good Karma Domes - Dome Models

Bringing the math to life through dome models

Starting with paper/cardboard models is a cheaper and quicker way of learning how frequency works and how the triangles fit together than building a full size dome and having troubles putting it together. After the paper models, we'll show you how to make a larger model out of lumber and PVC pipe hubs.

The basic structure we will work with is called the "Icosahedron". It is a sphere that is made up of 20 equilateral triangles. Each vertice represents a point on an imaginary sphere. Three of these points will define one equilateral triangle face ( icosa face ) of structure ( icosahedron ). The icosa face or original equilateral triangle is a one frequency. These vertices ( corners or where triangles meet ) are pents. As frequency develops ( or as the icosa face is broken down ) the original corners of the one frequency will ALWAYS remain pents. The interior triangles develop by using frequency will always be hexes. The edges represent the chord. There is a proportional relationship between this chord length and the size of the sphere. This proportional relationship is defined by what dome builders refer to as "The Chord Factor" we will discuss this later in each model section.

radius x chord factor = strut ( chord length )

There are three models to make.

  1. a regular Icosahedron otherwise known as a 1 frequency Icosasphere.
  2. a 2 frequency and is little more difficult but also is stronger and rounder.
  3. a 4 frequency, and our favorite here at Good Karma Domes.
Be sure to make these models in order or you will be lost. This way you will see how the frequency develops. Note the drawings on model pages are not drawn to scale. Work off of measurements!!!

Our Motto at Good Karma "SAFETY FIRST" Be careful - You only have to cut yourself once and then I won't have to tell Ya'.


How to make a hub and strut model dome.

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