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Page Title:
Presentation of identical units |
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| MILT81821
When identical units are mounted on dry-system
3.3.1.17 Presentation of identical units.
paneIs, one shall be sectionalized and the other shall be portrayed by silhouette. Silhouettes shall be
painted dull black and fabricated from 3/8-inch plywood or composition hardboard material. The
silhouettes shall be securely attached to the main panel by countersunk screws. Silhouettes of
actuating cylinders, valves, etc., shall have the inner mechanism indicated by colors which will
provide suitable contrast against the black background. Silhouettes installed on an animated-type
panel shall be constructed essentially as above except that the inner or operating mechanism shall be
constructed to show the motion of key operating parts in a manner similar to that of the actual
component being represented. The movement of these parts shall be manual or, in specified
exceptional cases, shall be mechanically or electrically actuated. Such silhouettes shall be joined
with connecting Iines which shall repainted or silk-screened on the face of the panel, or with plastic
or metal strips attached to the panel by conventional means. All such Iines shall be color-coded to
agree with the color system used in the related end item technical order to indicate their function.
Contrast with the background panel shall be provided. Such parts shall be readily discernible from a
distance of at least 20 feet.
3.3.1.18 Duplication of equipment. Unless otherwise specified in the Detail Specification,
the installation of identical or near-identical parts or systems shall be avoided.
3.3.1.19 Special controls. Special controls required to operate the trainer panels that are
not a part of the actual related end item or are not used to control signal simulators shall be
grouped in an area not readily visible to the students, but readily accessible to the instructor. For
ease of teaching system operation, special controls for signal simulators on electronic trainer panels
shall be located in an area visible to both instructor and student. All special controls, malfunction
control handles, control valves, switches, and other variable controls shall be clearly marked to show
all settings of the controls. All special controls shall be provided with friction locks or equivalent
positioning devices. The location and means of hiding required for these special controls shall be
indicated in the Detail Specification. All special controls shall be marked in accordance with
3.3.3.22.
3.3.1.20 Trainer power and signal distribution.
Each trainer, independently operable
trainer panel, and panel group shall be supplied with all hoses, lines, cables, and fittings necessary to
provide interconnection for required signal and power transmission between related trainer panels
and the power source in the training facility at the Government site. A 50-foot extension cord,
cabling, tubing, or lines, as necessary, shall be provided to interconnect the units to the trainer
where units must be placed outside the classroom for noise reduction purposes as specified in
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