NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Timing Lunars with a Rock
From: Bruce Stark
Date: 2005 Jul 18, 23:26 EDT
From: Bruce Stark
Date: 2005 Jul 18, 23:26 EDT
This morning I posted a note saying the old nav. manuals recommended using a string-and-bullet pendulum to check the half-minute glass. I finished with the unthinking remark: " I suppose you had to give the pendulum a few moments to settle the length of its swing."
That's nonsense, of course. I think it's true for clock pendulums, where the pendulum gets a push. But It seems to me a simple string-and-weight pendulum would swing a shorter distance each beat, while the time of each swing would remain the same.
Bruce
That's nonsense, of course. I think it's true for clock pendulums, where the pendulum gets a push. But It seems to me a simple string-and-weight pendulum would swing a shorter distance each beat, while the time of each swing would remain the same.
Bruce