Re: Variable Capacitance and Inductance

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-qwest-dot-net>" <evp-at-pacbell-dot-net>

Tesla list wrote:
> 
> Original poster: "rheidlebaugh by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <rheidlebaugh-at-zialink-dot-com>
> 
> Jim: I believe if you measure the electrostatic gradient of the earth you
> will be quite impressed how large the charge change with elevation is. The
> change is large enough to measure changes in cm of height from the earth
> surface. It has been used to control wing level on drone aircraft.
>   Robert  H

	The electric field gradient does indeed vary with altitude, but that's
due to geometric effects and has nothing to do with capacitance.  The
use of field measurements for attitude control was first done by RC
model enthusiasts, more than 20 years ago, and does indeed give a useful
degree of level sensing.

Ed