JOTP-011
5 December 2014
APPENDIX A. BACKGROUND/RATIONALE
ANNEX 1. ENVIRONMENTAL TESTS
is determined based on the number of takeoff events. The number of takeoff events in the life of
a munition may be estimated from the total flight duration defined in AECTP 100, Annex E,
Appendix 1, for each commodity type transported by `Jet Aircraft' divided by an assumed average
flight duration of 10 hours per flight.
A.1-3.1.2.3.3 Helicopter Cargo Transportation Vibration (Appendix C, Annex 2, Paragraph C.2-
4.2).
Large surface and underwater munitions would not be transported by helicopter but small
munitions may be transported by a variety of helicopters as part of its LCEP. Some of the more
common helicopter types used throughout NATO with a cargo capacity can be grouped according
to their fundamental blade frequencies as per Table A-4. The vibration environment for these
cargo helicopters can be addressed by the vibration profiles in MIL-STD-810, Method 514, Annex
C for `Helicopter Cargo'. If other cargo helicopters are identified as part of the LCEP, then the
blade frequencies (f1) for these shall also require consideration but only if they are sufficiently
different to the 11 Hz, 17 Hz, and 21 Hz already identified. Since it is not always possible to
predetermine the specific aircraft types that will be used during transportation, the total test
duration based on the total flight duration defined in AECTP 100, Annex E, Appendix 1 for each
commodity type transported by `Helicopter' should be split between the different helicopter types
identified. For those identified in Table A-4, this will require the test to be divided equally between
the three blade frequencies (f1=11 Hz, 17 Hz, and 21 Hz) as a minimum. In the current release of
AECTP 100, land based munitions are expected to be transported up to 20 hours and sea based for
up to 5 hours as internal cargo by helicopter. Based on this guidance and the test equivalence of
1 hr vibration for 6 hrs of flight, helicopter cargo transportation for land based munitions would
be conducted for 1.11 hrs per axis at each of the three blade frequencies for a total of 3.33 hours
per axis and similarly for sea based munitions, 16.66 minutes per axis at each of the three blade
frequencies for a total of 50 minutes per axis. If the munition is not suitable for internal helicopter
cargo transportation, this test may be eliminated.
A.1-3.2 Tactical Combat Platform Dynamics (Appendix C, Annex 2, Paragraph C.2-5).
Tactical movement of munitions by the combat platform will typically require them to be loaded
into a launcher/silo. In many instances, the dynamic environment is highly specific to the method
of deployment and the combat platform, so tailoring is recommended.
A.1-17
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business