This week, we continued the designing and construction of the prototype for our legged walker. First, we completed a whole mockup of the robot using cardboard. We built this simple model in order to have a better understanding of the placement of the legs and of the different electronic components. Then, we started working on a larger and more detailed prototype of the legs for the walker. At first, we only assembled the front legs of the walker. However, we soon realized that a different design of the rear legs was required to ensure the proper performance of our creation. As a result, we also worked on the design of the rear legs and we managed to complete it before the end of the week. During the our designing process, we also worked on the method of propulsion for our legged walker. At first, we decided to use servos to power the legs of the robot. As we progressed in our designing process, however, we found out that in order to reproduce a fluid and realistic walking motion, there would have to be more than one power source for each leg. Hence, we decided to abandon the servo design and use motors instead. (Additionally, one of the advantages that came with the use of motors was that it would be possible to power two gears with only one motor by linking them with a transmission system.) Next week, we plan in using Fusion to design and test out the propulsion system for the legs of the walker.