Fall 2001 6.311-2 Why Control? Easy question to answer for aerospace because many vehicles(space- craft, aircraft, rockets) and aerospace processes(propulsion ) need to be controlled just to function Example: the F-117 does not even fly without computer control and the x-29 is unstableFall 2001 16.31 1—2 Why Control? • Easy question to answer for aerospace because many vehicles (space￾craft, aircraft, rockets) and aerospace processes (propulsion) need to be controlled just to function — Example: the F-117 does not even fly without computer control, and the X-29 is unstable