MIL-STD-1365C
5. DETAILED REQUIREMENTS
5.1 Requirements for mobile equipment.
5.1.1 General mobility requirements. Mobile equipment shall be designed to meet the mobility requirements and the pertinent tests contained in SAE-AS8090, as modified by this standard.
5.1.1.1 Mobility index (MI) and vehicle cone index (VCI). When required, the mobility index (MI) and vehicle cone index (VCI) shall be derived in accordance with FM 5-430-00-1 and FM 5-430-00-2. The MI shall be as specified in the applicable development specification or by the procuring activity for the specific equipment based
on the off-road requirement of the vehicle.
5.1.1.2 Air transportability. When required to be air-transportable, the equipment shall be designed to be compatible with the specific aircraft types intended for such transport. Because of differences in the physical characteristics of weapons handling equipment to be shipped, and the aircraft used to transport them, this design standard cannot define all the requirements which apply. However, users are advised to obtain and utilize guidance referred to in 6.4. If 6.4 is insufficient to define the parameters needed to prepare a development specification, users should contact the United States Air Force Air Transportability Test Loading Agency (email: ATTLA@wpafb.af.mil).
5.1.1.3 Ramp performance. Air-transportable equipment shall be capable of transitioning from a horizontal surface to a ramp inclined 20 degrees and then back to a horizontal surface without interference or bottoming out. Non-air-transportable equipment shall be capable of transitioning a 10-degree ramp without interference or bottoming out.
5.1.2 Navy shore-based requirements. Activities preparing developmental specifications for Navy shore-based equipment are referred to SAE-AS8090 for guidance regarding specific requirements applicable to the equipment.
5.1.3 Shipboard requirements.
5.1.3.1 Stability. Vehicles shall be capable of operating on aircraft carriers under flight deck conditions (simple harmonic motion) of ±11 degrees in roll with an 18-second period and ±2 degrees in pitch with an 8-second period. Other shipboard equipment shall be designed to remain stable on a 26 percent (15 degrees) slope in a loaded operating configuration. This stability requirement applies at any axis relative to the equipment. Stability shall be evaluated by the following procedure:
a. Place the loaded unit on a tiltable platform coated with a slip resistant deck covering having a static coefficient of friction of at least 1.15 dry or 1.00 wet. The longitudinal axis of the equipment shall be parallel to the edge of the platform which will act as a pivot.
b. Raise the opposite edge slowly until it makes an angle of 15 degrees with the horizontal. Observe the results, then lower the platform.
c. Turn the equipment 15 degrees about its vertical axis, and re-raise the platform.
d. Repeat step c until 24 observations, each at a different position of the equipment, have been made.
5.1.3.1.1 Mobile equipment failure. Mobile equipment fails this test when any of the following occurs:
a. Vehicle upsets.
b. Brakes do not hold.
c. Equipment slides on platform.
d. Load slides relative to the equipment.
5.1.3.2 Shock and vibration resistance.
5.1.3.2.1 High-impact shock. When specified (see 6.2), shipboard handling equipment shall meet the Grade A shock requirements of MIL-S-901. For surface ships, applicability of high-impact shock requirements to shipboard handling equipment are as specified in OPNAVINST 9072.2.
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