the resistivity of the plasma (kg/m3) from to with the result as follows: where (W m) is the Spitzer resistivity of the plasma of ~1.2x10−3 where is the electron temperature assumed to be 15 eV. The above result is the same as equation (7) for and equation (5) for . Starting with the definition of plasma wind power from equation , rearranging and recognizing that equation can be substituted and then using equation yields the following expression which is the same as equation (10) for . Note that solution for and must also satisfy equation . A number of the examples cited assume a magnetopause radius that does not meet the MHD applicability test of equation . From the definition of power in physics a constant force is power divided by velocity, the force generated by the plasma magnet (PM) sail is as follows Note that as the falloff rate increases that the force derived from the plasma wind decreases, or to maintain the same force and/or must increase. Equation gives the mass for each physical coil of radius (m). Since the RMF requires alternating current and semiconductors are not efficient at higher frequencies, aluminum was specified with mass density = 2,700 (kg/m3). Estimates of the coil mass are optimistic by a factor of since only one coil was sized and the coil circumference was specified as instead of . The coil resistance is the product of coil material resistivity (Ω m) (e.g., ~3x10−8 for aluminum) and the coil length (m) divided by the coil wire cross sectional area where (m) is the radius of the coil wire as follows: Some additional power must compensate for resistive loss but it is orders of magnitude less than . The peak current carried by a coil is specified by the RMF power and coil resistance from the definition of electrical power in physics as follows: The current induced in the disc by the RMF (A) is the integral of the current density from equation on the surface of the disc with inner radius and outer radius with result: the same as equation (11) from Slough for =1. Laboratory experiments validated that the RMF creates a magnetospheric bubble, electron temperature near the coils increases and that thrust was generated. Since the scale of a terrestrial experiment is limited simulations or a flight trial was recommended. Some of these concepts adapted to an ionospheric