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Amphibious ATV

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Saved by Michael
on December 20, 2013 at 12:00:25 am
 

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Description

 

      The Amphibious ATV is a six-wheeled light survey and exploration vehicle, normally provided to large Science teams. A simple rectangular frame supports the power supply, engine, and open-topped ABS plastic body. It has two foam-padded vinyl-covered seats, and a small cargo deck which could hold another person -- very awkwardly. There is no windshield or rollbar; seatbelts are provided, but the Project recommends against using them during amphibious travel. Steering is accomplished by braking all the wheels on one side -- very inefficient, but it does allow the ATV to skid-steer in a zero-radius circle.

 

     Derived from the Mobility Unlimited Amphicat, this Morrow Project vehicle benefits from anachronistic battery technology.

 

 

Specifications

 

Crew:  2

Weight:  empty, 218 kg; loaded, not more than 436 kg; payload is thus 218 kg

Length:  2.05 m

Width:  1.35 m

Height:  0.86 m

Ground clearance:  0.15 m (under hull)

Turning radius:  zero

Ground pressure:  0.07 kg/square centimeter

Max speed: 

(road) 19 km/h

(water) 2.4 km/h

Fording:  amphibious

Gradient:  70% when fully loaded

Engine:  4 kilowatt electric motor

Electrical system:  24 V; there are two headlamps

Batteries:  twenty Morrow Project vehicle batteries

 

     The batteries store a total of 30 kilowatt-hours of electrical power, or enough electricity to run the motor at full power for 7.5 hours. The batteries have Morrow Industries data plates; their name is given on the plates as "Vehicle Battery, 240 Volt". An Electrical Repair or Electronics skill roll will identify the batteries as being futuristic technology. The electric motor is expensive but contemporary, coming from a typical American manufacturer. A watertight hatch in the cargo deck gives access to the battery and motor compartment.

     The suspension is of the solid axle type, with no springs or shock absorbers of any kind -- in fact the six axles are mounted rigidly to the frame. Steering is accomplished by applying the brakes to all three wheels on one side (skid steering). The ATV is fully amphibious, propelled in the water by its wheels; freeboard when fully loaded is 0.4 meters. Fitted with a low-power outboard motor (not provided by the Project), it can reach 4.2 kph.

     When lightly loaded, the ATV has sufficient power and torque to attempt climbing dangerously steep grades. Driver skill, rather than vehicle power, will determine the maximum slope that can be traversed.

     Controls consist of an accelerator pedal, a direction control lever (forward or reverse), a parking brake lever, and two steering brake levers. An on/off switch, a headlamp switch, and a 12 volt accessory jack complete the dashboard items.

 

Maintenance and Installed Equipment

 

     Since the internal combustion engine has been entirely replaced, keeping the vehicle operating is much easier -- but it still needs maintenance.

  • Lubrication:  the differentials, axles, and wheel bearings need regular lubrication -- say, at least every six months. Chassis grease, gear oil and lubricating oil are needed.

  • Tiresthese are low-pressure Amphicat 11.5x20 tubeless types, bonded to the wheel. They are unique to the ATV.

 

 

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