Sorry if I came across a bit blunt
Yeah I'm very sure that the most that you want to cruise at is Mach .85. If the sim was really detailed then you could do .855.
N1 and N2 are your low speed and high speed compressors in the engine. N1 is the first stage (Low speed) and then the N2 is the second stage (high speed). Since turbines work differently than piston driven engines the air needs to be compressed and then shot through and turns the fans at the back of the engine. these fans are connected to a shaft that turns the main fan in the front.
here is a neat video of the process.
http://www.rolls-royce.com/education/schools/how_things_work/journey02/flash.html
Hope that helps on how things work with the jet engine.
Much thanks! ;) You guys really know your stuff!
-B
