A controllable pitch propeller (CPP) or variable pitch propeller is a type of propeller with blades that can be rotated around their long axis to change their pitch. If the pitch can be set to negative values, the reversible propeller can also create reverse thrust for braking or going backwards without the need of changing the direction of shaft revolutions.
Read more about Controllable Pitch Propeller: Aircraft, Ships
Famous quotes containing the word pitch:
“I dream that I have brought
To such a pitch my thought
That coming time can say,
“He shadowed in a glass
What thing her body was.””
—William Butler Yeats (1865–1939)