Welcome to the first post of the CMU Cooperative Robotic Watercraft (crw-cmu) blog.
At the time of writing we have completed two boats:
Boat 1 was constructed with a balsa wood hull that was coated in fibreglass. It uses a brushless motor to run and is steered by a steering servo on the rear.
Boat 2 was constructed using insulation foam. Two pieces of insulation foam were glued together to make a hull that was 4" high. This foam was cut using hot wire. The foam was then sanded and painted before being coated in a protective (and glossy) resin. The boat is powered by a larger fan than boat one. Instead of using two out-of-water rudders to control the boat the entire fan is rotated using a servo.
Boats 3, 4 and 5 are in some stages of production. Hopefully we can post more photos soon.