Propulsion

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* Fission (x)
* Fission (y)
* Fission (z)
* Fusion (DD)
* Fusion (DT)
* Laser Ice: High Test Peroxide Ice, liquefied, decomposed and seeded with various nanoparticles to absorb focused beams in a conventional multi-mode laser thermal drive. Ships with extensive laser systems make use of this technology. The hydrogen peroxide ice is also useful as a deep cryogenic heatsink in combat. Liquified H2O2 can be used as a monopropellant, though a relatively low performance one with specific impulse of 150s. Laser Ice drives integrate monopropellant thrusters (the catalytic decomposition stage) into their drives so as to gain extra thrust from the monopropellant mode.
* Laser Thermal: Common across known space due to the use of beam stations and mutli-mode drives that also allow the use of sails to focus stellar radiation instead of laser beams.
* Methylox
* Orion Fission Fusion Pulse Drive: In the 2100s Military vessels of a certain size, usually above 10,000 tons, use a fusion orion drive. The fission catalyzed fusion pulse units use extremely efficient plutonium initiator stages powered by an inductive system as they pass through the thrust plate assembly at high speed. ISP is optimized by optimizing the composition of the pulse units, with as much of the expended reaction mass being deuterium as possible. Ablation compounds sprayed on the thrust plate are also as hydrogen rich as possible, though other engineering factors result in these fluids having various classified compositions. The high velocity mass drivers that shoot the pulse units on shuch ships are usually spinal mount weapons in and of themselves.
* Orion Laser Initated Pulse Drive: A more modern version of the orion drive that uses lasers to power the pulse units via a fusion pulse, which triggers a smaller plutonium initiator, which then causes the main fusion resction. This configuration increases specific impulse and conserves plutonium. Development of the sacrificial laser mirrors required to focus / direct the beams, both inside the pulse unit and behind is a challenge that not all of the major powers have solved as of 2131.
* PIT (Pulsed Induction Thruster):
* PPFG (Pulsed Plasmoid Field Grid): An electrodeless plasma thruster using a thin tension rigged field emitting grid nozzle. This extremely lightweight grid is furled and unfurled by handler bots and serves as a gigantic nozzle allowing extremely efficient thrust as it interacts with the plasmoids generated at the engine thrust coil.
* Simnox Thrusters: Silicon metal nanoparticle oxygen, Simmox is a form of ISRU metal oxygen thruster that provides moderate Isp, good thrust, superb reliability and uses propellants easily harvested across space. Variant technologies based on other commonly harvested metals such a aluminum, titanium and iron are also viable. Particle mixes such as those prepared from ferrosilicon are also used as it is easier to engineer a thruster that tolerates a variety of metals than it is to clean out nanoparticles and source pure propellant. Simnox was a brand name that has now become synonymous with the technology itself, with the Lunar company itself no longer active in the Federation.
* Simnox-MV (SMV, Simnox-Methane-Variable): SMV is a new Federation variant of Simnox engineered to also use methylox and to freeze oxygen into ice with its variable geometry tankage. Methane oxygen is still a common propellant pair around the belt due to its early application by SpaceX and the first settlements across the belt. A major advantage of the system is as a combat heatsink, with the system able to cool its cryogenic materials to solid state and assist in emergency thermal management of other systems.
* Solar Electric:
* Solar Thermal: An old form of drive such as the Solar Moth...

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