Richard Clark wrote:


Hi Chuck,

The author wasn't particularly interested in the electrification as he
was the conduction and subsequent discharge. In actuality, what is
described as exogenous electrification is no different from
autogenous. The air currents described simply convect smaller
particles as has been described in subsequent years in other aviation
material starting with "Atmospheric Electricity," Chalmers, J.A. -
1967; or earlier with "The Fair Weather Atmospheric Electric Potential
and its Gradient," Clark, J.F. 1958.

Normal convection builds up a charge stratification on the order of
190 V/m at ground level, but declines to half that a mile up. At that
same mile altitude (above ground level) charge density increases
1000%.

Needless to say, aircraft at different altitudes in identical, clement
weather are subject to vastly different fields.

73's
Richard Clark, KB7QHC

Hi Richard,

Thanks for the second opinion and additional information. I agree with
your interpretation.

73,

Chuck

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