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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: 60° Pendulum Astrolabe
From: Robert VanderPol II
Date: 2016 Jul 22, 20:58 -0700
From: Robert VanderPol II
Date: 2016 Jul 22, 20:58 -0700
From: Noell Wilson
Date: 2016 Jul 20, 19:48 -0700. . . .
Going out of my area, I know that coriolis forces act on weather near the earth surface. Do they affect a stationary pendulum and would that change the "accuracy" from the poles to the equator?
Regards, Noell
No coriolis effects are dynamic effects based on a moving object in a rotating frame of reference, that is the object is moving in the frame. A plumb bob is approximately stationary in the frame of reference that is the surface of the earth.
There may be measurable changes in vertical due to tidal forces from the sun and the moon. Setting up near a body of water with large tides such as the Bay of Fundy may also have measurable effects on the local vertical.
