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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Timing Lunars with a Rock
From: Frank Reed CT
Date: 2005 Jul 19, 17:40 EDT
From: Frank Reed CT
Date: 2005 Jul 19, 17:40 EDT
Henry Halboth wrote:
"With a little practice, counting "and 1 - and 2 - and 3, etc."
will
really serve the same purpose. Before I could afford a stop watch the
time between sight and chronometer reading was often accounted for in
this manner."
really serve the same purpose. Before I could afford a stop watch the
time between sight and chronometer reading was often accounted for in
this manner."
In experimental tests, I get errors of about 3 seconds per minute by
counting. That's 5%. By contrast, a crude pendulum should be accurate to about 3
seconds in ten minutes or 0.5%.
Also note that the "clock" mechanism of a crude pendulum is still verbal
counting. As with an ordinary pendulum clock, the swinging pendulum in this
case only serves to regulate the beats.
-FER
42.0N 87.7W, or 41.4N 72.1W.
www.HistoricalAtlas.com/lunars
42.0N 87.7W, or 41.4N 72.1W.
www.HistoricalAtlas.com/lunars
