They burn Hydrazine and their thrust is scalable.
It seeks to replace conventional Hydrazine fuel for future missions.
Now the spacecraft is about to run out of a key fuel, Hydrazine.
The DART spacecraft will use small Hydrazine thrusters which utilise the electric propulsion system.
The rover is then attached to a platform on which the Hydrazine propellants are located.
The traditional fuel used in satellites is Hydrazine which is extremely toxic to humans as well as the environment.
In the best case, the fault is attributable to the test bench,
perhaps a leak in the Hydrazine supply lines.
ISRO has successfully developed ISROSENE, which is a rocket
grade version of kerosene as an alternative to conventional Hydrazine rocket fuel.
Right now, most spacecraft run on Hydrazine, but NASA's new fuel is nearly 50% more efficient,
promising longer missions that use less propellant.
The second stage employs the Vikas engine which carries 40 tonne of liquid propellant--
Unsymmetrical Di-Methyl Hydrazine(UDMH) as fuel and Nitrogen Tetroxide(N2O4) as oxidiser.
With a propellant loading of 2.5 tonne(Mono-methyl Hydrazine and Mixed Oxides of Nitrogen),
each of these engines generates a maximum thrust of 7.4 kN.