JOTP-011
5 December 2014
APPENDIX A. BACKGROUND/RATIONALE
ANNEX 1. ENVIRONMENTAL TESTS
TABLE A-4. HELICOPTER MAIN ROTOR PARAMETERS
Main Rotor
Helicopter
Rotation
Number
S3 Test
f1,
Speed,
of
Frequency,
Hz
Hz
Blades
f1
CH-47D ( Chinook )
3.75
3
11.25
11 Hz
CH-46 ( Sea Knight )
4.40
3
13.20
UH-60 ( Black Hawk )
4.30
4
17.20
Sea King / Commando
3.48
5
17.40
Puma
4.42
4
17.68
17 Hz
EH101 ( Merlin )
3.57
5
17.85
NH-90
4.26
4
17.04
CH-53E (Super Stallion )
3.00
7
21.00
21 Hz
A.1-3.2.1 Land Based Munitions Tactical Dynamics (Appendix C, Annex 2, Paragraph C.2-5.1).
During operational use, land munitions may be moved by, and fired from wheeled and/or tracked
combat platforms while stationary and/or moving. When a munition is designed to be fired from
a stationary platform, the munition is typically stowed and secured during movement. The
munition may also be installed and secured on the platform in a ready to fire configuration.
Additionally, some ready to fire munition configurations may have the ability to be launched/fired
from moving platforms. Tailoring of the vibration and shock environments, based on measured
data, is required accounting for different vehicles, stowage configurations (e.g., in racks, launch
tubes, canisters, or rails on a turret) and launch/fire on the move as applicable. MIL-STD-810,
Method 514, Annex F provides guidance regarding deriving tailored vibration test severities,
whilst vibration testing should be conducted in accordance with MIL-STD-810, Method 514 or
525 as appropriate depending upon munition physical size. Shock testing should be conducted in
accordance with MIL-STD-810, Method 516. Where platform specific data are not available, then
default severities for wheeled and tracked vehicles selected from MIL-STD-810, Method 514 may
be appropriate for vibration testing, and restrained cargo shocks may be applied using those
severities applicable to wheeled vehicles. Both tests should simulate the equivalent operational
mode
distance
specified
in
Edition
4
of
AECTP
100,
Annex
E,
Appendix 1, for a `Land Vehicle Mounted Missile' on a `Combat Platform'. The ready to fire
and/or the fire on the move configuration, if applicable, is assumed to account for at least 20% of
the distance travelled on the combat platform (or 1000 km based upon Edition 4 of AECTP 100).
Tailor this distance in accordance with the LCEP.
A.1-3.2.2 Sea Based Munitions Tactical Dynamics (Appendix C, Annex 2, Paragraph C.2-5.2).
Munitions deployed from surface ships may either be mounted above deck, or from within the
ships structure. The above deck location will be fully exposed to ambient conditions, and as such
A.1-18
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