Turning Radius

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The BEAM Glossary says:

The turning radius is not always presented as a specific numerical figure. Rather, it is often used in a generalized way.

For example, a robot that uses differential or skid steering can turn in a complete circle in a relatively small area by driving one wheel while the other remains stationary. It would not be unusual for this kind of robot to be described as having a "very tight turning radius".

However, a numeric figure for the turning radius of a particular robot can be determined by measuring the distance from the center point of a circular path executed by that robot, to the outer edge of that circular path.

Also, when designing a robot (for example, one utilizing car-like steering) it is possible to closely approximate what the turning radius will be. The following formula is crude but works well enough. Be sure to use consistent units of measure when entering numeric values.

Turning radius = track / 2 + wheelbase / sin(maximum steering angle in degrees)


Note: The above formula only provides the Turning radius for the wheels and does not account for any part of the robot's frame or cover that might overhang the turning radius as determined using the above formula.

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