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Star Trek - The Next Gene…ractive Technical Manual
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1994-08-09
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TRACTOR BEAMS
Starfleet missions sometimes require direct manipulation of relatively
large objects in proximity to a starship. Such operations can take the form of
towing another ship, modifying the speed or trajectory of a small asteroid, or
holding a piece of instrumentation at a fixed position relative to the ship. The
execution of such missions generally requires the use of tractor beam
remote manipulators.
Tractor emitters employ superimposed subspace/graviton force
beams whose interference patterns are focused on a remote target,
resulting in significant spatial stress being applied on the target. By
controlling the focal point and interference patterns, it is possible to use this
stress pattern to draw an object toward the ship. Conversely, it is also
possible to invert the interference patterns and move the focal point to
actually push an object.
EMITTERS
Tractor beam emitters are located at key positions on the ship╒s
exterior hull, permitting objects at almost any relative bearing to be
manipulated. Key among these are the two main tractor beam emitters,
located fore and aft along the keel of the Engineering Hull as well as a third
main emitter located on the forward surface of the interconnecting dorsal.
Additional emitters are located near each shuttlebay for use in shuttle
landing maneuvers. Mooring tractor beam emitters, used when the ship is in
dock, are located at each reaction control thruster quad.
The main tractor beam emitters are built around two variable phase
16 MW graviton polarity sources, each feeding two 450 millicochrane
subspace field amplifiers. Phase accuracy is within 2.7 arc-seconds per
millisecond, necessary for precise interference pattern control. Secondary
tractor beam emitters have lesser performance ratings. Main tractor beam
emitters are directly mounted to primary structural members of the ship╒s
framework. This is because of the significant mechanical stress and inertial
potential imbalance created by tractor beam usage. Additional structural
reinforcement and inertial potential cancellation is provided by tying the
tractor emitter into the structural integrity field (SIF) network by means of
molybdenum-jacketed waveguides.
Effective tractor beam range varies with payload mass and desired
delta-v (change in relative velocity). Assuming a nominal 5 m/sec« delta-v,
the primary tractor emitters can be used with a payload approaching
7,500,000 metric tonnes at less than 1,000 meters. Conversely, that same
delta-v can be imparted to an object massing about one metric tonne at
ranges approaching 20,000 kilometers. ╞