The foundation of the independent research initiative. Electrohydrodynamic thrusters operating in atmospheric conditions — no propellant storage, no combustion, no moving parts. Ionised air is accelerated directly by high-voltage electrode fields to generate thrust. All prototypes are self-designed, self-built, and tested in-lab. This is where the first-principles physics was validated, the KUF datasets were generated, and the two publications were produced.

A miniaturised gridded ion thruster developed under the Furim Institute Forward Looking Minds Fellowship. Ion thrusters accelerate propellant ions through electrostatic grids to achieve high specific impulse. At the microscale, grid spacing, aperture geometry, and beam neutralisation become the critical engineering variables. This project bridges the lab-scale ionic work of the initiative with the space-grade architecture of flight-heritage electric propulsion.

Electrospray propulsion extracts and accelerates charged droplets or ions directly from a liquid propellant surface using high electric fields. Uniquely suited to ultra-small spacecraft where volume and mass constraints rule out most other propulsion options. The Furim collaboration explores this technology as a precision attitude-control and fine-manoeuvring system, with a long-term eye on CubeSat and pico-satellite platforms.

The most commercially credible branch of the long-term vision. Hall thrusters occupy the zone where industry buys, NASA flies, and universities push toward higher power — making them the strongest bridge between current research capability and serious scaling ambition. The thrust density, efficiency, scalability, and engineering maturity of Hall thrusters outperform most alternatives for a founder building from real products toward high-power systems. The X3 nested Hall thruster exists precisely because teams are pushing Hall above 100 kW while keeping device dimensions and throttling practical. This is also the only branch where large-scale in-space propulsion — orbit tugs, cislunar logistics, high-power transfer vehicles — is not a fantasy.

The long-term moonshot branch. If the goal is very-high-power plasma propulsion, MPD is substantially closer to that identity than PPT, standard electrospray, or gridded ion. Princeton's Lorentz-force work and recent literature confirm MPD as a serious research path for higher-thrust electric propulsion. MPD is not the first company product — brutal power demands, electrode erosion, materials stress, harder test infrastructure, and a weak near-term customer path make that impractical. But MPD is what the programme grows into, built on the Hall thruster foundation.

Electric heating of atmospheric air or creation of plasma jets for propulsion within planetary atmospheres. Unlike EHD which relies on ion drift, this branch uses direct plasma heating or arc-jet mechanisms to generate thrust. A parallel applied direction with near-term relevance to high-altitude aircraft, drone platforms, and specialised aerospace systems where chemical fuel is a liability.

Not atmospheric aircraft — satellites skimming very low Earth orbit and ingesting residual atmosphere as propellant. ABEP systems eliminate the need to carry propellant, enabling indefinite station-keeping in VLEO where drag is significant and propellant mass budgets are prohibitive. The intersection with the EHD and gridded ion work is direct: ionising atmospheric gas and accelerating it efficiently is the shared physics across all four branches.