7.4 is not "more than twice" 2pi - I must have been thinking of just pi. The period for a 90 degree amplitude is about 18% greater than for small amplitudes.
Shalom
George
http://web.raex.com/~gmurphy/
----- Original Message -----
From: George Murphy
To: asa@calvin.edu ; Carol or John Burgeson
Sent: Saturday, June 30, 2007 8:02 PM
Subject: Re: [asa] ICR's GENE project
.............................
When A is 90 degrees (which in practice requires a rigid "massless" rod rather than a string) this works out to ~7.4sqrt(L/g), more than twice the small amplitude period.
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Received on Sun Jul 1 06:27:35 2007
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