Seacoast International Submarine Team Langdon Tarbell, Ryan Forbes, Matt Crist, Tyler Dutile, Sean LaMontagne, Mike Cargill

Hull The hull is made of many layers of fiberglass with a foam core. Construction of the hull  The hull was constructed using plywood ribs spaced 6 inches apart to create the general shape of the sub.  We chose the foam core construction method because would help create a strong righting point as well as a more robust frame.

Safety and Life Support Safety  The safety buoy is a positively buoyant cutout of the hull. It has been attached to a spool of cord that will act as a dead-man switch.  The positively buoyant hatch will open when the hatch release is pulled. Life Support  SCUBA  Spare Air

Propulsion Power unit  Consists of a bicycle drive system mounted upside down and a right angle gear. This unit is mounted to an aluminum plate that is fiberglassed to the hull. CW-CW Right Angle Gear  Transfers the motion from the bicycle to the shaft. Shaft  A universal Joint attached to a steel pipe supported by a Teflon bearing with dual propellers attached to the end of the shaft.

Propulsion (Cont.) Impeller  The impeller is used to increase the amount of water that is pushed over the blades of the propeller. Propeller  We took the idea of a basic 2 bladed boat propeller and modified it to suit our specifications.  IE- power, input, RPM, pitch, Dual Propeller

Controls and Control Surfaces Dive Plans  The dive planes are controlled by the movement of a curved piece of steel bolted to the shaft that extends from the planed. Rudders  The rudders are controlled by a cable with one end attached to a rudder ring on one end and an actuator. Stern Planes  They are fixed to counteract the rotational torque from the propeller.