Recovery involves lowering the collective pitch, relieving forward pressure on the cyclic or more commonly, both.
When encountering settling with power, pilots are taught to apply forward cyclic to fly out of the condition or lowering collective pitch.
Differential changes to the collective pitch (i.e. thrust) of the rotors gives powerful control forces.
Airboats do not have brakes and are incapable of traveling in reverse, unless the prop design is collective pitch.
Yaw is accomplished through varying torque, which is done simply by increasing collective pitch on one of the blade sets.
For example, if the collective pitch is raised, the pitch angle increases in all regions.
Most models are fixed-pitch, i.e. the collective pitch of the blades cannot be controlled, plus the cyclic control is only applied to the lower rotor.
Pitt reduced the collective pitch to keep the rotor speed from falling too quickly.
The governors also help the pilot control the collective pitch on the helicopters main rotors, to keep a stable, more accurate flight.
A helicopter with tandem rotors uses differential collective pitch to change the pitch attitude of the aircraft.