The hawk is an extremely fast plane that is fun to fly around Kerbin. It has a top speed of around 1425 M/S and resists heat fairly well. Also, the Hawk is quite maneuverable.
There is one small problem with the plane, and speeds of over 600 M/S the craft starts to wobble if SAS is turned on, you can remedy this by turning off SAS (press t).
Press 1: Activates on center engine
Press 2: Activates on two outer engines
Press 3: Activates all engines
Press 4: Deactivates all engines