# How much thrust can plasma produced from water have?

If water could be converted to plasma for a propellant by electricity how much thrust would water produce? What would be the byproduct?

• If you build a huge engine, you can get much thrust even when using a low energy fuel. – Uwe Nov 19 '18 at 21:40
• What exactly does "converted to plasma for a propellant by electricity" mean? Arcjets do make some plasma but the function there is for heating by passing a large current through it. But that just makes it hot, the same way burning makes things hot. The arcjet produces thrust by expansion in a nozzle, and so the propulsive actions are not related to electricity. Since you've got a nice answer for that process, if you'd like to ask about electric propulsion using water, maybe you should ask separately. – uhoh Nov 20 '18 at 5:20
• Of course you can see your own edit history: click this: i.stack.imgur.com/rKr6i.png then click this: i.stack.imgur.com/uVxkY.png – uhoh Nov 21 '18 at 1:26
• I'm glad to see the question restored to its original form, and the excellent answer now restored as well. – uhoh Nov 22 '18 at 2:38

• The exhaust would be water in some form or another -- water vapor, droplets => So, not plasma... This doesn't answer the question as stated. – Antzi Nov 20 '18 at 2:19