UK-based electrical engineer Zachary Tong has created a simpler type of orientation adjustment for satellites known as a liquid metal reaction wheel that conserves fuel.
Rather than using conventional flywheels, Zach used a loop of liquid metal, propelled by a magnetohydrodynamic drive, for torque and orientation, in space where conservation of angular momentum comes into play.
He used the non-toxic Galistan, a liquid metal that freezes at -19C, as a proof of concept, and tested it hanging from a string and mounted on an air bearing, with the results showing it produced a notable torque despite high conductivity and friction.
Zach’s next move is to try ionic liquids, which don’t oxidise but remain liquid to -80C, as they could offer significantly more potential.
