Seacoast International Submarine Team

1
Seacoast International Submarine Team

• Langdon Tarbell, Ryan Forbes, Matt Crist, Tyler
  Dutile, Sean LaMontagne, Mike Cargill

2
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.

3
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

4
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.

5
Propulsion (Cont.)
Dual Propeller

• 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,

6
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.