Johnson bar (vehicle)

Some Johnson bars have a fully ratcheting mechanism, some just a series of detents, and others yet simply engaged and disengaged positions.

A common example is the Johnson bar-controlled parking brake found on many trucks and buses.

Johnson bar is also the North American term for a steam engine's reversing lever, used to control the valve gear.

Some light general aviation aircraft (including Piper Cherokees, Beech Musketeers, and some early model Cessnas—such as the Cessna 140)—use Johnson bars to actuate flaps and wheel brakes.

A small number of older aircraft (including the Mooney M-18, some older M20s and some Progressive Aerodyne SeaReys) also have landing gear actuated by Johnson bars.