Enhanced motion vehicle

As the vehicle travels through the attraction, the motion base simulates movement, such as driving over rough terrain or leaning through a turn, that makes the ride experience appear more realistic.

Four such systems were built (in chronological order): The Enhanced Motion Vehicles (EMV) are intended to appear as a battered military troop transport or "Time Rover".

EMVs are driven less than 14 miles per hour (23 km/h) by air filled tractor trailer tires atop the surface of a slotted roadbed.

Beneath the slot, a tubular guiderail guides the front wheelset and is responsible for supplying power to the vehicle, which is 480 volts in three phase, with a capacity of 200 Amps.

The EMV motion base is attached by three hydraulic actuators to the frame of the chassis carrying the bulk of unsprung weight, allowing the low-mass body shell to articulate independently and rapidly with micrometer precision by incorporating a position feedback system.

A guest's physically intense experience is programmed to achieve the illusion of greater speed and catastrophic mechanical failure using the enhanced-motion vehicle's ability to add several feet of lift then rapidly descend, shudder and tremble, and intensify cornering with counter-bank and twist.

The 35 gallons of hydraulic fluid used on the Disneyland version takes two hours to clean off the track when a hose splits.

Because of Japan's environmental codes regarding oil spills,[citation needed] the Japanese design team elected to substitute electromagnetic actuators on the ride vehicle.

The vehicle also responds to programming selections indicated by a section of track and reports which subprogram it is currently running.

There are large red mushroom buttons at each loading station and in the tower within easy reach of each operator that will halt all vehicle motion.

In order for vehicles to move throughout the attraction, Ride Access Control (RAC) "lockout keys" must all be in place, indicating that no personnel occupy the track.

Before a vehicle can be dispatched into the attraction, operation personnel verify all seatbelts are locked and loose articles are secured.

Operation personnel must check that each safety belt is secure two ways - positive action visual inspection, where the rider pulls at a yellow strap attached to the buckle end, and an automatic LED panel on each side of the vehicle which lights up a grid point when a buckle is locked.

Only then are operators allowed to press a green dispatch button located deep within a protective sleeve.

In the retracted mode, the vehicle can make sharp turns, to the point of the rear wheels actually crossing the track slot (though this does not happen under normal operation).

For instance, when a vehicle is stopped and the motion base is not moving, the pump will only engage one or two times per minute.