<t> VASIMR is just a type of ion engine, not really new tech and still needs a propellant.<br/>
Those engines have high specific impulse (i.e. they consume little prop) but have very little thrust.<br/>
<br/>
The revolutionary thing about a reactionless drive, would be that you just need energy ...

<t> Yeah, i had this happen, repeatedly on one of my worlds.<br/>
<br/>
Played as Dhayut, found a Wekkarus colony ship, settled an ocean planet in one of my systems<br/>
-> taxes set to zero, but they were unhappy at being part of my empire,<br/>
rebelled immediately and became idependent.<br ...