Editing Gyroscope (section)

==Contemporary uses==
===Steadicam===
{{Main|Steadicam}}
A [[Steadicam]] rig was employed during the filming of the 1983 film ''[[Return of the Jedi]]'', in conjunction with two gyroscopes for extra stabilization, to film the background plates for the [[speeder bike]] chase. Steadicam inventor [[Garrett Brown]] operated the shot, walking through a redwood forest, running the camera at one frame per second. When projected at 24 frames per second, it gave the impression of flying through the air at perilous speeds.<ref>Brown, Garrett. "Return of the Jedi", ''[[American Cinematographer]]'', June 1983.</ref><ref name="EmpireOfDreams">''Empire of Dreams: The Story of the Star Wars Trilogy'' ''Star Wars Trilogy'' Box Set DVD documentary, [2004]</ref>

===Heading indicator===
{{Main|Heading indicator}}
The heading indicator or directional gyro has an axis of rotation that is set horizontally, pointing north. Unlike a magnetic compass, it does not seek north. When being used in an airplane, for example, it will slowly drift away from north and will need to be reoriented periodically, using a magnetic compass as a reference.{{sfn|Feynman|Gottlieb|Leighton|2013|pp=115–135}}

===Gyrocompass===
{{Main article|Gyrocompass}}
Unlike a directional gyro or heading indicator, a gyrocompass seeks north. It detects the rotation of the Earth about its axis and seeks the ''true'' north, rather than the ''magnetic'' north. Gyrocompasses usually have built-in damping to prevent overshoot when re-calibrating from sudden movement.

===Accelerometer===
{{Main article|Accelerometer}}
By determining an object's acceleration and integrating over time, the velocity of the object can be calculated. Integrating again, position can be determined. The simplest accelerometer is a weight that is free to move horizontally, which is attached to a spring and a device to measure the tension in the spring. This can be improved by introducing a counteracting force to push the weight back and to measure the force needed to prevent the weight from moving. A more complicated design consists of a gyroscope with a weight on one of the axes. The device will react to the force generated by the weight when it is accelerated, by integrating that force to produce a velocity.{{sfn|Feynman|Gottlieb|Leighton|2013|pp=131–135}}