This works, initially. Now, you have to balance the charge on your space craft, or else you won’t be able to eject any more electrons.
If you balance this charge by ejecting protons, you have a hydrogen thruster.
If you balance this charge by ejecting positrons, you have a photon thruster (in the far field).
The former is still “tank” limited. The latter requires high energy to get any useful impulse.
This works, initially. Now, you have to balance the charge on your space craft, or else you won’t be able to eject any more electrons.
If you balance this charge by ejecting protons, you have a hydrogen thruster.
If you balance this charge by ejecting positrons, you have a photon thruster (in the far field).
The former is still “tank” limited. The latter requires high energy to get any useful impulse.