THE CLOCK OF THE LONG NOw - Long Now Foundation

Torsionpedulum4.nb 1
Torsional Pendulum Calculation
Units are pounds, inches, radians
constants
inertia 13.9 inch pound sec^2;
TotalWeight 83.6 pound
83.6 pound
ShearModulus 11.57*^6 pound inch ^2;
ElasticModulus 29*^6 pound inch ^2;
ShearModulusRoak 9.78*^6 pound inch ^2;
TensileStrength 125000 pound inch^2;
G 32.16 12 inch sec ^2;
ElasticModulus ShearModulus
2.50648
Rectangular Torsion Spring
Appoximatly:
h 0.5 inch;
b .01 inch;
L 24 inch;