Reversing the blade pitch for helicopter action, Tom gunned the atomic turbine.

As it broke surface, he reversed the blade pitch and gunned the rotor.

Then he reversed blade pitch and eased the control wheel forward.

Both ducted-fan assemblies are capable of changing blade pitch independently.

Some ceiling fans have adjustable blade pitch instead of reversible motor.

Then he reversed blade pitch for air flight and gunned the atomic turbines.

"Perhaps," he mused, "the mechanism for changing the blade pitch could be improved."

Tom instantly cut the jets and changed the blade pitch.

The blade pitch is typically controlled by a swashplate connected to the helicopter flight controls.

Changing the blade pitch in different elevations can be very beneficial to a boater.