start your flight,
use the Start Flight panel to select a direction you want to lift off.
Click a direction button to launch your plane. Once the
engine starts, wiggle the throttle or press the minus and equals
buttons on your keyboard, (You have to move your throttle at takeoff so
the game can recognize it) then go to full throttle. The
engine will take several seconds to start up, then the airplane
will take off.
The directions available for takeoff may be different depending on the airflield you are at.
If you click the H in the middle then you start in the hangar, and have to taxi to the runway and take off manually.
Launchpad at large field
Launchpad at small field