This week, we completed the technical drawings for the level arm. We based our drawings from the cardboard prototype that we did last quarter. From this, we realized that the L-shaped lever cannot complete its full motion, moving forward and backward to push the wheel, at a certain point along its motion path. Thus, we attempted to design an optimal lever that alleviated most of the problems. We found the optimal length before, between and after the two curves of the level. This can be seen in the center drawing of the picture. The optimal length between the corner and the middle curve is 4 inches. Furthermore, the optimal length between the middle curve and the 90 degree level is 9 inches.

In addition, we acquired the parts necessary to make the brake mechanism. We are leveraging a bike braking system and applying the similar design to our wheelchair.