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*To*: tesla-at-pupman-dot-com*Subject*: RE: New Inductance Formula*From*: "Tesla list" <tesla-at-pupman-dot-com>*Date*: Fri, 03 May 2002 17:18:40 -0600*Resent-Date*: Fri, 3 May 2002 17:42:14 -0600*Resent-From*: tesla-at-pupman-dot-com*Resent-Message-ID*: <ZzgZeD.A.TbC.UBy08-at-poodle>*Resent-Sender*: tesla-request-at-pupman-dot-com

Original poster: "David Thomson by way of Terry Fritz <twftesla-at-qwest-dot-net>" <dave-at-volantis-dot-org> Hi Shaun, >I've modified and tested this one for all metric units. > 1.55*10^-3 * (N*R)^2 * kg * m > L = ------------------------------- > [(354.3*R)+(393.7*H)] * coul^2 > (R and H in _metres_, N is unitless) Very good. Best formula I have seen yet for Wheeler's in metric. I expanded your list of inductance equivalents... Wb V * Sec Kg * m^2 Kg * m^2 Ohm Volt^2 * Farad L = --- = ------- = -------- = ------------- = --- = -------------- = Henry Amp Amp Coul^2 Amp^2 * Sec^2 Hz Amp^2 >I have a question about Wheelers formula, In Modern Resonance Transformer Design Theory, a 1985 version, it uses in the demoninator [8*a + 11*b] instead of 9 and 10, is this an older version of the equation or slightly different application? The [8*a + 11*b] is used for calculating the inductance of a flat spiral coil as opposed to a solenoid coil for the 9 and 10 formula. Dave

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