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|  MIL-C-18087A(SH)
3.10.7 Flanges. hubs and sleeves.
Flanges, hubs and sleeves shall be as
specified in 3.4.7 through 3.4.7.13.
A visual indicator shall be provided to
3.10.8 Sleeve positi on indicator.
show the position of the clutch sleeve.
3.10.9 Synchronizing mechanism. A ratchet and pawl mechanism to sense the
synchronous speed shall be incorporated as an integral part of the clutch. This
mechanism shall not transmit any torque to the driven shaft at any time.
3.10.10 Ratchet and pawl mechanism. The ratchet and pawl mechanism shall be
constructed for minimum wear and noise in the overrunning position. Pawls shall
be located and confined by mechanical means. Spring actuation of pawls may be
employed as required to assure clutch engagement or disengagement
3.10.11 Lockout device. When specified (see 6.2), a manual or servo-
operated mechanism shall be provided to prevent clutch engagement. The actuated
lockout device shall prevent the clutch from ratchetting as well as from engaging.
3.10.12 Lock- in device. When specified (see 6.2), a locking device shall be
provided to lock the clutch into engagement when the output torque reduces or
reverses. The lock-in mechanism shall prevent shuttling of the clutch sleeve
under conditions of fluctuating torque. This device shall be capable of being
actuated while the clutch is rotating and allow the clutch to transmit full power
torque in both directions of rotation.
3.11 Environment requirements.
3.11.1 Trim, list. roll. and pi tch, Clutches shall operate when the ship is
operating in the condition shown in table IV or as specified (see 6.2). Trim and
list or roll and pitch may occur simultaneously. Pitch and roll time cycle data
shall be recorded when the pitch and roll angles specified exceed those listed in
table IV.
Trim, list, roll and pitch.
TABLE IV.
Submarines
Surface ships
Condition
(degrees)
(degrees)
Permanent trim, down bow or stern
30
5
Permanent list, port or starboard
15
15
Roll, port or starboard from even keel
45
60
Pitch, up or down from normal waterline
10
10
3.11.2 Lubricating oil temper ature. Unless otherwise specified (see 6.2),
oil inlet temperature to clutch under normal operating conditions shall be between
110 and 130 degrees Fahrenheit
However, the clutch shall be constructed for
start-up and unrestricted operation with oil inlet temperature as low as
Maximum rise between oil inlet and oil discharge temperatures from the clutch
shall be not greater than
24
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