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Preliminary Research and Documentation

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Figure 1 - Underwater portion of the SWATH chassis design.

 

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Figure 2 - Thruster panel

Requirements

Ballast Tanks

The chassis is designed to hold 2 sets of ballast tanks, one set at the front of each hull and one set at the back of each hull. These ballast tanks are connected to 2 water pumps that can fill or empty the ballasts when needed. The ballast tanks must be full at all times to keep the SWATH stable. 

 

Foam Liner Compartment 

The foam liner compartment is a layer of foam under the belly of the SWATH concept car. The foam liner compartment ensures that the SWATH does not sink even if it is filled with water.

 

Rudderlets

Rudderlets are small boat-shaped rudders that can turn clockwise and counter clockwise. A set of 12 rudderlets are placed at the bottom of each hull away from the ballast tanks. TheyEach are rudderlet has a connector rod that is placed perpendicularly to the central axis of the rudderlet. The other end of each connecting rod is connected to each other by a control rod in each hull. The control rods are designed to move forward and backward to enable the rudderlets to turn clockwise or counter clockwise. 

The 2 control rods from each hull are controlled by the central steering system. The control rods are designed to move forward and back to turn the rudderlets clockwise or counter clockwise. 

 Figure 

Figure

Figure

 

Thruster Panel

Rudderlet Control

 

 

  • Control between one to four thrusters (electric motor-driven propellers or RIM drive motors) of up to 2 kilowatts per thruster.  
  • Each thruster should be able to be controlled in forward and reverse movement.
  • Precise control of between one and five control surfaces like rudders and fins using marine grade stepper motors so we have directional control and they could potentially be used for stabilizing movement when stationary in the water.
  • A fuel level indicator for gas or diesel.
  • A battery charge level indicator.
  • Control four trim tanks: We will have multiple trim tanks which can be filled or emptied with water with pumps. Two tanks will be at the front (one on the left and one on the right hull). Two tanks will be at the back (one on the left and one on the right hul). These tanks do not need to fill or empty water too fast as the trim will not need to be changed often or rapidly on each trip. They will help keep the vessel level when weight is moved around on the passenger platform. We will need pumps to move the water or air from tank to tank.
  • Control four buoyancy tanks: We will have up to four buoyancy control tanks which will add/remove water/air as needed from the tanks to adjust the height of the vessel depending on whether the vessel is in movement or docked or in other situations that require the height to be adjusted.
  • All pumps will run on 12, 24, or 48VDC (TBD).
  • Movement sensor (9 axis accelerometer)
  • Water level sensor in buoyancy tanks
  • Water level sensor of the vessel relative to the ocean
  • Water/air temperature sensor - Optional
  • Additional sensors - Optional
  • The vessel should be able to connect via API to the Ocean Builders web server when in range of the internet (specific APIs to be determined later) - BONUS

 

  

 

Licensing

This project is being developed as an open-source project with the following licensing:

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