Preliminary Sketches For Bogey Fail-safe

These sketches show two rudimentary ideas for fail-safes to incorporate into the design of the bogey.  The first one, labeled 1, is to have a third track running above the car in all locations.  If a failure event occurs, sensors send a signal to two arms that will then rise out of the top of the bogey and grab onto the tertiary rail.

The second idea was simply a static arm from the side of the bogey that would catch the car should it fall off the track for any reason.  I placed wheels on this arm so that the car could still be pushed along the track while it is hanging.

In both ideas, I felt the ability for the car to retain some ability to be moved along the track after failure was essential so that it may be quickly cleared from an in-use track section and brought to a station for repair without needing another vehicle to come disconnect it from below.  While I don't think either is or should be the entire solution to the fail-safe problem, they and other ideas like it will help the team get closer to a reliable system.