RE: Flat secondary measurements

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

Original poster: "David Thomson by way of Terry Fritz <twftesla-at-qwest-dot-net>" <dave-at-volantis-dot-org>

>Inductance Contest
>------------------
>You have 426.72 metres (1400 feet) of 24 awg (0.51055mm diam) wire.

>What's the highest inductance you can achieve with it?

>Coils must be single layer, with concentric windings.  The minimum
>allowable pitch is 0.6382 mm (0.025125 inches) which corresponds to
>a spacing ratio of 0.8.

>Answers direct.

The optimum inductance for a given length of wire will be obtained when the
average radius is 4/3 of the width.  The width of the winding will be 6.349"
and the average radius will be 8.5".  Total number of turns will be 315.9.
The total diameter of the coil will be 23.3".  The radius of the coil center
will be 5.291".

Dave