A&stmct--Railgun launchers must be energy efficient to realize use in practical systems, espe-cially mobile applications which require compact power supplies. This paper shows that railgun launcher Miciency has already been demonstrated at 47 percent at launch kinetic energies up to 8 MJ. Improvements in armature performance have made this performance level possible. Foreseeable improvements in annatures and power supply-launcher integration will push launcher efficiencies to at least 66 percent.
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