[quote=@lydyn] I concur, Dr. Now how do we construct the fuel pumps or what program should be the drive for regulating the fuel ratio into the pumps? *Tries to sound smart* Haha. Sorry for being quite guys! Busy weekened!~ Awesome posts though. ^^ I'll have to gather up my wits and see who's left in the posting order here. ^.- [/quote] [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.