MIL-DTL-62366D(AT)
3.4.2 Normal speed. The slip ring assembly shall operate at a continuous speed of
7.5 revolutions per minute (rpm) (see 4.3.5.2).
3.4.3 Maximum speed. The slip ring assembly shall intermittently operate at 12 rpm
without sustaining damage or degrading performance (see 4.3.5.3).
3.4.4 Stopping. The rotor shall be brought from a rotational speed of 7.5 rpm to a
complete stop in no more than 0.25±0.05 seconds without sustaining damage or degrading
performance (see 4.3.5.2).
3.4.5 Static limit load capacity. The slip ring assembly, including the base, shall be
capable of transferring each of the load combinations listed below without degrading electrical
performance and without permanent structural deformation. The loads listed below shall be
applied in the coordinate system as specified in figure 1 (see 4.3.5.4).
a. 1000 pounds (lb) (454 kilograms (kg)) vertically (down) applied combined with
350 lb (160 kg) horizontally applied to the slip ring assembly to produce a torque of
6000 (lbf-in) (677 N-m) about any axis in the horizontal plane.
b. 500 lb (227 kg) applied along any axis in the horizontal plane.
c. 200 lb (91 kg) vertically (up) applied along the z-axis.
3.4.6 Electrical.
3.4.6.1 Power rings. The power rings shall function with maximum input voltage for
fault free, battery only conditions and single fault conditions as specified in MIL-STD-1275.
The steady state voltage shall not exceed 33 V. Class I and class II power rings shall be as
specified below (see 4.3.5.5.1 and 4.3.5.5.1.1).
Class I -
Class I power rings shall be designated as numbers 1 and 2 and shall transmit
a current of 190 amperes (A) with surges of 500 A for up to
20 milliseconds (ms).
Class II - Class 2 power rings shall be designated as numbers 33 through 38. Rings 37
and 38 shall be high power rings and shall continuously transmit a current of
190 A, with surges of 500 A for periods up to 20 ms. Rings 33 through 36
shall be low power rings and shall continually transmit current up to 50 A,
with surges of 70 A for periods up to 20 ms.
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