Seacoast International Submarine Team

Langdon Tarbell, Ryan Forbes, Matt Crist, Tyler Dutile, Sean LaMontagne,

Mike Cargill

HullThe 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.