Speed: The Maximum Speed of the AeroMachine when in the air. Steering: The Turning Capability of the AeroMachine. Accele: The Acceleration of the AeroMachine, how quickly it can go from 0 to Max Speed. Aero Limit: The Speed the AeroMachine needs to travel before it can get airborne. Shield: The Endurance of the AeroMachine, how much damage it can take. Stability: The Gripping Power of the AeroMachine. In-game, there's also a temperature gauge which limits the amount that you can boost. If your temperature maxes out, you'll have to wait a long while until you can use a boost again.