READ THIS IS VERY IMPORTANT

Controls: VERTICAL TAKEOFF
if you dont use the vertical takeoff then controls are normal.

Groupe:1+Vtol Down= Vtol nozle rotations
Groupe:2+Trim Down= landing gear
Groupe:3+Trim Down= lift refuelling arm
Groupe:4= Missiles
Groupe:5=Missiles
Groupe:6=Missiles
Groupe:7= Bombs

ENJOY
The McDonnell Douglas (now Boeing) AV-8B Harrier II is a single-engine ground-attack aircraft that constitutes the second generation of the Harrier Jump Jet family. Capable of vertical or short takeoff and landing (V/STOL), the aircraft was designed in the late 1970s as an Anglo-American development of the British Hawker Siddeley Harrier, the first operational V/STOL aircraft. Named after a bird of prey,[8] it is primarily employed on light attack or multi-role missions, ranging from close air support of ground troops to armed reconnaissance.
info from Wikipedia