MIL-DTL-4510F
3.4 Performance. The spotlight shall be capable of operating satisfactorily under the
following conditions:
Temperature ranging from -54 °C to +71 °C.
a.
b.
Exposure to salt-sea atmosphere.
c.
Vibration incident to service use.
d.
Fungus growth as encountered in humid climates.
e.
Rainfall as encountered in any locale.
f.
Sand and dust conditions as encountered in arid locales.
3.5 Components. The manufacturer's standard commercial components shall be used
with such modifications as are necessary to meet the dimensional and performance requirements
of this specification. The spotlight shall consist of the following major components:
Lamp housing (see 3.5.1).
a.
Lamp (see 3.5.2).
b.
Support arm (see 3.5.3).
c.
d.
Switch and wiring (see 3.5.5).
e.
Roof seal (see 3.5.6).
f.
3.5.1 Lamp housing. The lamp housing shall be fabricated of metal and shall be
designed to hold and position PAR 46 screw terminal lamps. The indexing notch for the lamp
shall be positioned to locate the widest divergence of the beam in the horizontal plane. The
housing's diameter shall be not greater than 6.3125 inches. The housing's length shall be not
greater than 6 inches.
3.5.2 Lamp. The lamp shall be a PAR 46, screw terminal base specified in table I.
3.5.3 Support arm. A support arm with a mounting flange suitable for mounting the
spotlight on a plane surface shall be provided. The support arm shall support and position the
lamp head under all conditions specified herein. The length of the arm shall be such that the
distance from the horizontal centerline of the lamp housing to the face of the mounting flange
shall be 6.5 inches ± 0.25 inch. Mounting screws or bolts of sufficient length to fasten the arm
and adapter (see 3.5.6) to a panel or bracket 0.125 inch in thickness shall be furnished complete
with self-locking nuts or nuts and lock washers.
shall be furnished. The arm shall be an integral part of or fastened to the support arm and flange
(3.5.3). The control arm, when coupled to the support arm shall completely enclose all moving
parts. The length of the control arm (see 1.2.2) shall be ± 0.125 inch measured from the
mounting surface of the mounting flange (see 3.5.3) to the horizontal centerline of the control
handle or knob. The diameter of control knobs shall be not greater than 4 inches. Control
handles shall not extend more than 5 inches from the vertical centerline of the control arm. The
operations of the control knob or handle shall give the movement specified in 3.3.3.
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