The railcam was originally developed to shoot the AKC dog shows. We needed a device that could transport a camera and gimbal up to 20mph at “dog height” for about 120’ the Railcam is designed to run on a speed rail that is linked together with internal links that are spaced about 18” apart. we have since modified the Railcam to track Olympic class runners at various track and field events. and like the Railrunner, the Railcam can be modified to travel an almost any speed with almost any camera payload. Let us know your requirements and we will do our best to accommodate you.