ATTILA Thruster

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An electrical engine that provides more thrust than a Plasma Thruster but with a lower ISP.

Here are some stats for a 1.25 ATTILA in vacuum, with 68MW of power (typical for an upgraded KIWI fission reactor):

Fuel         Thrust      ISP     Fuel/sec
Argon       16.6 kN     634.2      .53/s
Xenon       27.2 kN     352.2    77.6/s
Lithium      7.2 kN    1646.8      .44/s
Monoprop    10.1 kN     713.5      .36/s
Liquid       3.5 kN    2854.0      .02/s

For comparison, here is a plasma engine with the same power input:

Fuel         Thrust      ISP      Fuel/sec
Argon        4.3 kN     2491.8      .03/s
Xenon        6.9 kN     1383.7     5.11/s
Lithium      1.8 kN     6469.9      .03/s
Monoprop     2.6 kN     2803.3      .02/s
Liquid       0.9 kN    11213.0    <0.01/s

As you can see, the ATTILA is much less efficient (meaning it has a lower ISP) than the Plasma Thruster , but produces about 4x the thrust.