[quote=@Midori]
<Snipped quote by lydyn>

[b]LET'S TALK SCIENCE[/b] (because I accidently brought it up and it's cool stuff)
Actually, by adjusting the flow I don't mean that there will be any more or less gas being pushed through the system. The propellant is actually injected into the engine at the same rate regardless of the amount of thrust produced by the engine. That doesn't make much sense right? Obviously the more fuel you pump into an engine that faster it goes! In this case that's not true.


[/quote]

Oh my gosh, I googled VASMIR engine and now my head is spinning on the Wikipedia page. It's too early for this. XD But it really does sound awesome. Didn't know about the existence of this part of spacecraft before!