
SECTION 5:
MAINTENANCE
4-18
Figure 4-26: The Armed T-Shaft
Release Function
After the RELEASE command has been decoded, the power supply is switched on to the motor. The
internal torsion spring is released by the motor and provides torque to the t-shaped release shaft. When
the T-shaped end of the shaft turns and aligns with the slot in the latch, a release will occur. The shaft
carries a small percentage of the mooring tension along its axis with support via two thrust washers at the
top (inside end) of the shaft.
The torque created by the spring needs to overcome the friction between the shaft and the latch. Because
the torque generated by the spring is a fixed quantity, the electrical current requirement of the motor is
purely a function of the size of the spring. The central design parameter of the mechanical release
assembly is the size (magnitude) of the spring force. The effective battery life is based on the minimum
voltage required to release the spring and the maximum release capability is defined by the mooring
tension frictional force that the spring must overcome.
Summary of Contents for 8242XS
Page 18: ......
Page 22: ...SECTION 2 SPECIFICATIONS 2 4 Figure 2 2 ICD 8272 XS Short 0010816 ...
Page 23: ...2 5 Figure 2 3 ICD 8242XS Long 0011329 ...
Page 24: ......
Page 68: ...SECTION 5 MAINTENANCE 5 18 Figure 5 17 8242XS MART Main Sub Assembly 0002737 ...
Page 72: ...SECTION 5 MAINTENANCE 5 22 Figure 5 19 8242XS Acoustic Release Transducer Assembly 0003226 ...
Page 73: ...5 23 Figure 5 20 8242XS Release Mechanism Sub Assembly Page 1 of 2 002780 ...
Page 78: ...APPENDIX A REMOTE RELEASE A 2 Figure A 1 8242XS Remote Release 0018268 ...
Page 80: ...B 2 Figure B 1 8242XS Tandem Kit Drawing 0006657 ...