progress

From the 1^st presentation we had 2 major initial designs for the fail-safe mechanisms.  upstop stop wheel and the safety wheel. The main purpose of the safety was to stabilize the bogie while traveling in an angle and the main purpose of the safety wheel was to provide a back up, if one of the load-wheel FALLS off the track.

After the first presentation we came up with two more significant designs of a fail-safe mechanisms. As well all know, the bogie will be traveling in an angle of 17 degree. A major fail-safe design is required to stop the bogie from rolling back, if there is a power failure during inclination. Obviously the pod will not fall from the track because we have the extra support of the upstop wheel. To stop the bogie from rolling back, we came up with the anti roll-back device. ARB

ARB is not a rocket science. It is a very simple mechanical design that has ratchet system and a pawl. As shown in the figure, its operation is very simple. It will prevent the bogie from rolling back incase of power failure while ascending in an angle.

Next, we decided to scratch  safety wheel from our design and instead add the third set bogie without any of these top wheels. This bogie will give more support to the whole system by evenly distributing the stress along the bar. Also it will hold the pawl that locks the bogie in the ratchet system.