Musical instruments with continuously variable pitch can effect a portamento over a substantial range.

A variation of the control grid is to produce the helix with a variable pitch.

Two small propellers with variable pitch were used for thrust and yaw control.

Monopipe is a variable open pipe which can produce variable pitches.

Its propellor was a two-blade metal design with variable pitch.

Unlike most other drums, they have a variable definite pitch.

They may be fixed or variable pitch.

Each engine has a variable pitch prop which can operate in forward or reverse.

It drives a two blade propeller with variable pitch in flight.

A conical spring can be made to have a constant rate by creating the spring with a variable pitch.