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Re: 7.1Hz, Frequency variation and Q



Original poster: "Barton B. Anderson" <bartb@xxxxxxxxxxxxxxxx>

Hi Ed,
Ran JAVATC. The 7.1 Hz "recipe" is below. (The Great Coil)

BTW, this undertaking would be right up there with the great Pyramids of Egypt!
I can already imagine the best sellers list 3000 years from now (The Great Coil - Was It Built by Aliens?) 8-)


Take care,
Bart

Tesla list wrote:

Original poster: Ed Phillips <evp@xxxxxxxxxxx>
    I'd like to see some proponent of the system use one of the various
Tesla coil design programs to design a system that could work at 7.1 Hz
with a power of say only one megawatt.  How big would the coil be?  How
much wire of what size?  Topload?  Estimate of losses?  (For the latter
calculating the DC resistance of the wire would give a lower limit.)
All the work in doing the calculation has already been done - someone
should take advantage of it.
J A V A T C v.10 - CONSOLIDATED OUTPUT
Sunday, July 17, 2005 8:38:51 PM

Units = Inches
----------------------------------------------------
Surrounding Inputs:
100,000 = Ground Plane Radius ( or 1.578 miles)
----------------------------------------------------
Secondary Coil Inputs:
Current Profile = G.PROFILE_LOADED
3,775 = Radius 1 ( or 314.58 feet, so a coil diameter of 629 feet!)
3,775 = Radius 2
1,000 = Height 1 (83.3 feet above the ground)
38,750 = Height 2 (3,229 feet to the top!)
18,875 = Turns
1 = Wire Awg (undersized)

Top Load Object Inputs:
Toroid #1: minor=7550, major=30200, height=42525, topload
(about 1/2 mile for outer diameter. 1/10 of a mile for minor diameter. And 0.67 miles high!)


----------------------------------------------------
Secondary Outputs:
0.0071 [kHz] = Secondary Resonant Frequency = 7.1 Hz
90 [deg°] = Angle of Secondary
37,750 [inch] = Length of Winding
0.5 = Turns Per inch
1.71071 [inch] = Space Between Turns (edge to edge)
37,308,049 [ft] = Length of Wire
5 = H/D Aspect Ratio
4,624.26 [ohms] = DC Resistance
550,578 [ohms] = Reactance at Resonance
560,762 [ohms] = Forward Transfer Impedance
9,450,426.24 [lbs] = Weight of Wire
12,341,855.734 [mH] = Les-Effective Series Inductance
12,078,153.679 [mH] = Lee-Equivalent Energy Inductance
13,148,413.282 [mH] = Ldc-Low Frequency Inductance
40,713.937 [pF] = Ces-Effective Shunt Capacitance
38,409.985 [pF] = Cee-Equivalent Energy Capacitance
64,935.017 [pF] = Cdc-Low Frequency Capacitance
976.352 [mils] = Skin Depth
32182.764 [pF] = Topload Effective Capacitance