DRAFT_PERM_Production_P-Spec_v3_0_23Feb2015_Pre_Sol.docx

PRF-PMM141.1/PERM

PERFORMANCE SPECIFICATION

FOR THE

120MM PRECISION EXTENDED RANGE MUNITION

(PERM) SYSTEM

Version 3.0

SUBMITTED BY: DATE:

Mr. Robert Thorne PERM-ATK Lead Engineer

Mr. John Pomfret PERM-Raytheon Lead Engineer

CONCURRENCE: DATE:

Mr. Joseph McPherson FSS Lead Engineer

APPROVAL: DATE:

Mr. Keith Davis PdM FSS

DISTRIBUTION STATEMENT D: Distribution authorized to the Department of Defense and U.S. DoD contractors only; Administrative or Operational Use, 7 January 2013. Other U.S. requests shall be referred to Commander, MARCORSYSCOM (PM AFSS), 2200 Lester Street, Quantico, VA 22134-6050.

FSC 1340

RECORD OF CHANGES AND REVISIONS

Brief Description/Paragraphs Affected Prepared by

-3.1.1.2(Projectile) -3.1.2(Setter System) -3.2.2.d(Setter System Interface) -3.2.5(Logistics Interface) -Table 1(PERM System Handling States and Modes) -3.2.6.a and b(States and Modes) -3.4.1.c(Projectile Initialization)

3.4.2.3(AUR)

-3.4.2.6(Separating Components) -3.4.3.2.a and b(Time of Flight) -3.4.3.4(Rocket Motor Initiation) 3.4.4.3.e(Warhead Fuzing) -3.4.5.a and b(Casualty Condition) -3.4.6.1(Depot Built-In Test) -3.4.7(Shelf Life) -3.4.10(Maintenance) -3.5.13.7(Air Drop) -3.5.17.5(Electrostatic Discharge (ESD)) -3.7.6(Finish) -3.8.6.2(Protection) -3.9.2.c(Propelling Charge) -Table 2(referenced paragraph 3.4.4.3-warhead Fuzing) -Table 2(referenced paragraph 3.5.13.6-Helecopter Sling Loads) -Table 2(referenced paragraph 3.5.13.7-Air Drop) -Table 2(referenced paragraph 3.5.17.5.2) -4.2.3.13.5(Aircraft-Helicopter) -4.2.3.13.6(Helicopter Sling Load) -4.2.3.17.2(Electromangnetic Vulnerability) -4.2.3.17.4(DC Magnetic Fields)

-4.2.3.17.5(ESD)

-6.2.2(Appendix B) D. Roberson

-3.3.1 (Weight) -3.4.2.3.b (Peak Sound Pressure) -3.4.3.2.a (Time of Flight) -3.4.3.2.b (Time of Flight) removed -3.4.4.2.b.ii (Lethal Mechanism) -3.4.4.2.b.iii (Target Set Criteria) -3.4.4.3.b (Warhead Fuzing) -3.4.4.3.e (Firing Reliability) -3.4.5.a & 3.4.5.b (Casualty)

-3.4.6.1 (DBIT)

-3.6.5.a (Dissimilar Metals) -3.8.1 (Insensitive Munitions) -Figure C-1 (Vibration Test Sequences) -Replaced references to TM 11166A-OR/A in paragraphs 3.2.5; 3.2.6.b; 3.4.1.c; 3.4.2.3.a; 3.4.2.3.b; 3.4.2.3.e; 3.9.2; and Appendix A.

-4.2.3.17.5 - 4.2.3.17.6 (ESD)

-Appendix C (Test Sequence Figures) J. Pomfret

-Added “FOUO” statement to all pages 3.2.4.b: Updated GPU reference 3.5.17.1: Updated MIL-STD-461 to MIL-STD-461F J. Pomfret

-Removed revision letters from some references -3.4.2.3.b (Peak Sound Pressure) J. Pomfret

2.4

3.3.2 (Container Quantity 3.4.1.a (Projectile Initialization 3.4.2.2.b (Overhead Lift Requirement) 3.4.4.2.b (Lethal Mechanism) 3.4.8.b (AUR Reliability)

3.5.12 (Loose Cargo) 3.5.17.5.1.b (Helicopter Transport Electrostatic Discharge (ESD)) 3.5.17.5.2.b (Personnel ESD)

3.8.3 (Environmental Safety Effects) 4.1.1.a (Methods of Verification)

4.2.2.7 (System Performance Tests)

4.2.3.5 (Rain)

4.2.3.9 (Sand)

4.2.3.10 (Dust)

4.3 (First Article Tests)

4.4 (Lot Acceptance Tests)

J. Pomfret

Table of Contents

List of Tables

SCOPE

Scope.

This specification establishes the performance requirements and quality assurance for the 120mm, Precision Extended Range Munition (PERM) system. The PERM system is being developed in response to extended range and precision fires requirements for the Expeditionary Fire Support System (EFSS).

Background.

The EFSS is a close support, all weather, quick response indirect fire system. The main weapon of the EFSS is the M327 120mm rifled towed mortar (RTM). The system currently has an effective range of 8 km with an objective of 20 km.

APPLICABLE DOCUMENTS

General.

Unless otherwise specified in revisions letter or for initial release, the following documents of the issue in effect on the date of invitation for bids or request for proposal form a part of this specification to the extent specified herein. The documents listed in this section are specified in Sections 3, 4 and 5 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information as example. While every effort has been made to ensure the completeness of this list, document users are cautioned that they shall meet all requirements cited in Sections 3, 4 and 5 of this specification, whether or not the documents are listed in this section.

1.1. Government documents.

1.1.1. Specifications, standards, and handbooks.

The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract.

NATO STANDARDIZATION AGREEMENTS

(Copies of these documents are available online at http://assist.daps.dla.mil/quicksearch/ or www.dodssp.daps.mil or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.)

CODE OF FEDERAL REGULATIONS (CFR)

29 CFR 1910.1000-1910.1017 - Carcinogens (Copies of these documents are available online at http://www.access.gpo.gov/nara/cfr or from the Superintendent of Documents, U.S. Government Printing Office, North Capitol & “H” Streets, N.W., Washington, DC 20402-0002.)

DEPARTMENT OF DEFENSE SPECIFICATIONS

DEPARTMENT OF DEFENSE STANDARDS

DEPARTMENT OF DEFENSE FIELD MANUALS AND HANDBOOKS

(Copies of these documents are available online at http://assist.daps.dla.mil/quicksearch/ or www.dodssp.daps.mil or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094

NAVSEA DOCUMENTS

NAVSEAINST 8020.11

GOVERNMENT INTERFACE DOCUMENTS

(Copies of these documents can be obtained by written request from Marine Corps Systems Command, Procuring Contracting Officer)

NAVSTAR GLOBAL POSITIONING SYSTEM JOINT PROGRAM OFFICE (GPS JPO)

(Copies of these documents can be obtained by written request from Marine Corps Systems Command, Procuring Contracting Officer)

OTHER DOCUMENTS

NON-GOVERNMENT DATA

M327 Technical Data- M327 Technical Data Package

(Copies of these documents will be made available by TDA Armements SAS, BP 29, Rte. d'Ardon, La Ferte Saint Aubin, 45240, France, phone: 33 02 38 51 63 63).

1.2. Order of precedence.

In the event of conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. All specified requirements and characteristics of the PERM system, unless otherwise indicated, are Threshold – [T] essential values with Objectives – [O] (desirable) requirements separately indicated. In the event of conflict, text shall prevail over figures and external interfaces over functional characteristics.

REQUIREMENTS

Item Definition.

The PERM System is comprised of various elements and subsystems. The following subsections provide definitions for the various elements and subsystems. The resulting terminology is used throughout this specification.

3.1.1. PERM System.

The PERM system shall be comprised of the all-up round containerized in PA117 container(s) with associated packaging material.

3.1.1.1. All-Up Round (AUR).

The AUR consists of the Projectile and Propelling Charge.

3.1.1.2. Projectile.

The Projectile is the part of the AUR that flies downrange and contains the warhead.

3.1.1.3. Propelling Charge.

The Propelling Charge is the hardware and energetic required to expel the projectile out of the mortar tube.

3.1.1.4. Container.

The All Up Round is stored and transported within the container.

3.1.2. Setter System.

The setter system interfaces with the Enhanced Portable Inductive Artillery Fuze Setter (EPIAFS).

3.2. Interface Requirements.

The PERM interface requirements are specified below.

3.2.1. AUR Container.

The AUR shall be containerized using PA117 container(s) as specified by MIL-C-70741. The PA117 containers may be modified to enhance the IM performance of the system. Any modification shall not alter the interlocking attributes of the PA117 container with other PA117 containers. Any modification to the PA117 container shall meet current Performance Oriented Packaging (POP) certification test requirements in accordance with Code of Federal Regulations (CFR) Title 49. Container modifications shall not degrade performance of the PA117 container.

3.2.2. Setter System Interface.

1. The Projectile shall include elements necessary to communicate with the Setter System during setting mode.

a. The projectile shall receive from the setter system, via the projectile interface device, all data necessary to fully initialize the projectile for mission execution.

b. The projectile may interface with the setter subsystem (via the projectile interface device) using either an inductive setter or direct connect setter.

c. If inductive fuze set is selected, the system shall be compatible with the EPIAFS handheld setting tool in accordance with ICD 13019872. If direct connect is selected, it shall be compatible with the direct contact ICD 13025592.

3.2.3. Mortar Weapon Interface.

The AUR shall interface with the M327 RTM per the M327 Technical Data package.

3.2.4. SAASM GPS Satellite Interface.

1. In flight, any interface between the Projectile and the GPS satellites shall be in accordance with ICD-GPS-200C to receive and process positional data necessary to guide the Projectile from present position to target.

e. For GPS navigation, the Projectile shall be capable of direct acquisition of the GPS P(Y)-code without initial acquisition of the GPS C/A code (T), and GPS acquisition of C/A code with handover to P(Y) code shall be maintained as a backup capability (O). The GPS shall be approved per GPU-09-105. Objective includes Threshold.

3.2.5. Logistics Interface.

The PERM system will not require new or additional Material Handling Equipment other than what is used for Marine Corps ammunition transport and storage.

3.2.6. States and Modes.

The PERM system shall conform to the handling states and modes as specified in Table 1.

Table 1. PERM System Handling States and Modes

(projectile and/or AUR)

(projectile and/or AUR)

(projectile)

Casualty

Guidance and arming and fuzing are inhibited (Projectile)

a. The AUR design shall preclude the system existing in two different operational modes simultaneously.

b. The AUR shall be capable of transitioning from the Operational State, Set or Off mode into the Logistical State, Field Handling mode within 3 minutes (T=O) when being handled by a full team of five Marines (all MOS 0811). The five Marines (MOS 0811) are assigned positions, duties, and responsibilities as follows:

i. Section Chief (SC), whose duties and responsibilities are the following:

· Training and efficiency of personnel.

· Performance of his section in training; firing, testing, and adjusting fire control equipment and inspection and maintenance of all section equipment, including the Prime Mover (PMW/PMT).

· Observance of safety precautions.

· Preparation of field fortifications for protection of equipment, ammunition and personnel.

· Camouflage discipline, local security, and radiological, biological, and chemical security discipline.

· Maintenance of forms in the equipment record folder.

· Policing the section area

ii. Gunner (G). Assists the SC in carrying out the duties specified in sub-paragraph (i). The Gunner’s primary duty is operation of the M67A1 sight.

iii. Cannoneers # 1, 2, and 3. Perform duties as directed by SC.

3.3. Physical Characteristics.

3.3.1. Weight.

The average weight of PERM containers, including contents, shall be less than (T) 67 lbs. to (O) 64 lbs.

3.3.2. Container Quantity

No more than (T) two to (O) one containers shall be used per PERM AUR.

3.4.

Performance.

3.4.1. Projectile Initialization.

Projectile initialization is the transfer of all necessary data from the setter system to the projectile such that a mission can be executed.

1. The Projectile initialization time shall be able to be set within (T) 10 seconds, (O) 5 seconds.

1. When in the Logistical state, field handling mode, the PERM system shall be able to transition into operational state, launched mode within (T=60 seconds; O=45 seconds) of receiving a complete fire command at the individual section.

1. Initialization procedures shall be capable of being accomplished with the current EFSS section personnel as discussed at 3.2.6 b and their associated Military Occupational Specialty (MOS 0811).

1. The AUR shall enable mission data retention, after setter initialization, for a minimum of (T) 5 minutes to (O) 10 minutes. The AUR shall be resettable within this data retention period.

1. The AUR shall return to an off mode after the retention period (requirement 3.4.1 (d)) expires. The Projectile shall not return to an off mode after launch if firing occurs within the minimum data retention period in accordance with 3.4.1 (d).

1. The AUR shall support (T) 20 to (O) an unlimited number of set / reset cycles from the set and unset conditions during its life cycle.

3.4.2. Launch.

3.4.2.1. Mortar Weapon.

The AUR shall be capable of being fired from the M327 RTM.

3.4.2.2. Loading.

a. The AUR elements shall be capable of being safely loaded into the muzzle of the M327 RTM.

b. The load weight of the projectile shall not exceed 56 lbs (T), 31 lbs (O).

3.4.2.3. AUR.

a. Recoil pulse and blast pressures due to AUR launch shall be such that operator “After Firing Mortar Maintenance” does not exceed:

i. Placing the barrel into a horizontal position using the elevating mechanism hand wheel without disassembling the breech

ii. Cleaning the bore with the EFSS barrel cleaning brush set (NSN 1015-14-511-5559) attached to Barrel Cleaning Rod Set (NSN 1015-14-322-0464)

iii. Swabbing the bore with cloths soaked in CLP (MIL-L-63460)

iv. Drying the bore with clean, dry rags

v. Lightly lubricating the bore with a soft bristle brush (NSN 7920-14-503-6313) and CLP (MIL-L-63460)

vi. Cleaning and lubricating the breech ball with CLP, then wiping dry for up to but not exceeding three consecutive days

b. The peak sound pressure at maximum charge, as measured at the Gunner’s position, shall allow more than 103 blast exposures per day, as calculated per paragraph 5.1.2 of MIL-STD-1474, when mitigated with double hearing protection. The gunner's position is described as being 10 feet behind the baseplate and a height of 61.5 inches at Time of Fire (TOF). Peak sound pressure may be averaged over multiple rounds.

c. If a misfire occurs, the AUR elements shall be capable of being extracted safely by the gun crew personnel. The use of specialized extraction tools is acceptable.

d. The AUR shall be capable of ignition with the existing M327 RTM operational modes of lanyard ignition (T) and auto fire (O).

e. The AUR shall induce no additional maintenance requirements on the mortar, which is limited to:

i. Check that the weapon has been bore scoped and pullover gauged: within the past 180 days and every 500 rounds after the initial 3,000 rounds

ii. Visually inspect mortar for: cracks, broken welds, rust, loose/missing/ dented or damaged parts, and foreign matter in the barrel. Wipe interior dry with clean, dry cloths prior to firing.

iii. Ensure the exterior surfaces of the mortar are free of all lubrication

iv. Check barrel for evidence of bulges, cracks, or dents. Check for foreign material in barrel.

v. Wipe the exterior of the barrel free of all lubricant prior to firing. Check the operation of the lunette lock. Check the lunette for proper operation. Apply a light coat of CLP to the muzzle of the barrel prior to installing lunette. Apply light coat of CLP to the interior rubber seal of the lunette prior to installing lunette on the barrel

vi. During firing, check for visible cracks on the mortar barrel. During firing, check for gas leakage (visible discoloration) around the firing selector. Clean/swab the bore after every twenty-five rounds have been fired.

vii. After firing barrel maintenance as described in paragraph 3.4.2.3.a.

3.4.2.4. Projectile.

The projectile shall operate below the maximum operating pressure of 21,611 psi.

3.4.2.5. Propelling Charge.

The propelling charge, including ignition train, shall be safe to use with the M327 RTM across all PERM operating environments as defined in the Lifecycle Environmental Profile (LCEP).

3.4.2.6. Separating Components.

11. Any separating components of the AUR shall be propelled forward of the mortar position.

11. All material jettisoned from the AUR shall be contained within a zone extending downrange from the muzzle, perpendicular to the Gun-Target-Line (GTL)such that it shall not endanger the EFSS gun crew.

11. Material jettisoned from the AUR shall present no unacceptable safety risks.

3.4.3. Flight.

3.4.3.1. Maximum and Minimum Range.

a. Minimum range of the AUR shall not exceed (T) 8 km. It is desired that the minimum range not exceed (O) 4 km.

b. Maximum range of the AUR shall not be less than (T) 16 km. It is desired that the maximum range is not less than (O) 20 km.

3.4.3.2. Time of Flight.

Time of flight (TOF) shall be (T) 3 minutes or less to (O) 1 minute or less at maximum range using 4-hour meteorological (MET) data.

3.4.3.3. GPS Noise Interference.

PERM shall meet its operational requirements with an RF input signal with a Noise-to-Signal ratio as high as 36 dB. This defines the unjammed environment.

3.4.3.4. Rocket Motor Initiation.

Any PERM rocket motor subsystem shall preclude initiation until safe separation distance from the mortar muzzle has been achieved and be in compliance with MIL-STD-1901.

3.4.4. Target Engagement.

3.4.4.1. Accuracy.

The AUR Circular Error Probable (CEP) shall be less than (T) 20 m to (O) 10 m with respect to target GPS coordinates (reference to WGS-84) at all operational ranges.

3.4.4.2. Lethal Mechanism.

a. The Projectile shall meet the effectiveness criteria as published by the Joint Munitions Effectiveness Manual (JMEM) Weaponeering System (JWS) 2.0.1 – Marine Corps version MCRP 5-7.10.7.

b. The PERM warhead lethal area shall be (T) 80% to (O) 400% of the lethal area of the M1101 HE warhead when conditioned as follows:

i. M1101 HE: primary fuzing mode (PD), 2/3 maximum M1101 HE range with an angle of fall of 75 degrees and terminal velocity of 255 m/s.

ii. PERM AUR: The most lethal fuze mode listed in section 3.4.4.3.a for the target, threshold minimum to threshold maximum range.

iii. Target set criteria:

A) Suppressing, neutralizing and destroying motorized targets B) Destroying dismounted personnel targets C) Destroying soft command and control targets

3.4.4.3. Warhead Fuzing.

a. The Projectile shall include (T) Height of Burst (HOB) and Point Detonate (PD), (O) HOB, PD, and PD delay selectable fuze modes.

b. PD mode shall be a secondary fuze mode (backup mode) in the event that HOB mode does not function, if selected.

c. PD Delay mode shall allow the Projectile to penetrate a 2-inch thick plywood target and function after hitting the target.

d. The projectile shall retain PD backup mode capability in an electromagnetic environment that could potentially interfere with HOB function.

e. The firing reliability of the fuze, which includes PD as a backup to HOB, as set shall be (T) 0.980 to (O) 0.995 through the lifecycle.

f. The fuze mode shall be selectable during Projectile initialization prior to gun launch.

g. The fuze system shall meet the safety design requirements of MIL-STD-1316.

3.4.5. Casualty.

PERM shall be capable of detecting a Casualty Condition in-flight.

a. A Casualty Condition shall be defined as a condition that prohibits the AUR from impacting within 80m of the programmed GPS coordinates.

b. PERM shall enter a Casualty Mode upon detection of a casualty condition.

c. In Casualty Mode, the following actions shall be inhibited: guided flight and payload arming and firing.

3.4.6. Initialization Built-In Test.

Initialization Built-in Test (IBIT) shall be performed during setter initialization of the AUR.

a. The Projectile shall perform an Initialization Built-In Test (IBIT) that verifies functionality of mission essential electronics and functions excluding fuzing.

b. The Projectile shall report Initialization Built-In Test (IBIT) results to the Setter System as part of the standard initialization.

c. IBIT execution and reporting timing requirements shall support time lines as referenced in section 3.4.1.

3.4.6.1. Depot Built-In Test.

Depot Built-In Test (DBIT) shall be used as a diagnostic tool during testing and shall not degrade the shelf life of the projectile. DBIT is not subject to the time requirement specified in section 3.4.1.a.

3.4.7. Shelf Life.

The PERM system shall have a minimum shelf-life of (T) 10 years to (O) 20 years when exposed to Logistical Storage (see Table 1). The Logistical Transport exposure shall be 6 months (T=O) and the Logistical Field Handling shall be 3 days (T=O).

3.4.8. AUR Reliability.

The AUR shall meet its performance and reliability requirements within its operating environment as specified in the LCEP.

a. The AUR reliability includes the ability for the AUR to be set, guide to the intended target within 40 m, and initiate the warhead per programmed fuze mode.

b. The AUR shall have a reliability of (T) 0.85 to (O) 0.96 at an 80% lower confidence limit throughout its lifecycle.

3.4.9. Maintainability.

a. The PERM system shall not require Field or Sustainment Level maintenance during its shelf-life/service life.

b. The PERM system shall require no Operator/Crew level maintenance beyond inventory, cleaning, inspection and preserving.

3.4.10. Maintenance.

The PERM system shall require no crew level preventative maintenance outside of that which crews currently conduct to ensure safe handling and firing of M327 mortar ballistic munitions.

3.4.11. Upgradeability.

The PERM system design shall enable software updates at the depot level with projectile disassembly (T) without projectile disassembly (O).

3.5. Environmental Conditions.

Testing configuration for each environmental condition shall be consistent with Table 2 in section 4.2.1.

3.5.1. Low Pressure.

The PERM System shall meet all requirements after exposure to low pressure due to air transport.

3.5.2. Temperature.

3.5.2.1. Operational Temperature.

The PERM system shall meet all requirements when exposed to the operational temperature range from -24 °F (-31 °C) to +124 °F (51 °C) (T).

3.5.2.2. Storage Temperature.

The PERM system shall meet all requirements after exposure to the storage temperature range from -60 °F (-51 °C) to +160 °F (71 °C) (T).

3.5.2.3. Temperature Shock.

The PERM system shall meet all requirements at the operating temperature extremes after exposure to temperature shock. The shock temperature extremes shall be -60 °F (-51 °C) to +160 °F (71 °C) (T).

3.5.2.4. Safe to Fire.

If fired outside of its operational temperature range but within the storage temperature ranges, the AUR shall maintain structural integrity such that the launch event will pose no hazards to the M327 operating crew.

3.5.3. Deicing.

The PERM system shall meet all requirements after exposure to chemicals for deicing and other contamination.

3.5.4. Solar Radiation.

The PERM system shall meet all requirements after exposure to solar diurnal radiation.

3.5.5. Rain.

The PERM system shall meet all requirements during and after exposure to rain.

3.5.6. Humidity.

The PERM system shall meet all requirements during and after exposure to humid environments as defined per the LCEP.

3.5.7. Fungus.

The PERM system shall neither support fungal growth nor suffer damage or degradation of performance caused by the presence of fungus spores or adjacent fungal growth.

3.5.8. Salt Fog.

The PERM system shall meet all requirements after exposure to salt fog.

3.5.9. Sand.

The PERM system shall meet all requirements after exposure to sand.

3.5.10. Dust.

The PERM system shall meet all requirements after exposure to dust.

3.5.11. Immersion.

The PERM system shall meet all requirements after being immersed in one meter of fresh water, as measured from the uppermost part of the test item to the surface of the water, for 30 minutes.

3.5.12. Loose Cargo.

The PERM system shall be safe to fire after exposure to loose cargo transport environment.

3.5.13. Vibration.

3.5.13.1. Shipboard.

The PERM system shall meet all requirements after exposure to shipboard vibrations.

3.5.13.2. Truck Transportation over U.S. Highways.

The PERM system shall meet all requirements after exposure to ground-mobile wheeled vehicle vibrations.

3.5.13.3. Two-wheeled Trailer and Wheeled Vehicles.

The PERM system shall meet all requirements after exposure to two-wheeled trailer vibrations.

3.5.13.4. Fixed Wing Aircraft.

The PERM system shall meet all requirements after exposure to fixed wing vibrations.

3.5.13.5. Aircraft-Helicopter.

The PERM system shall meet all requirements after exposure to aircraft-helicopter vibrations.

3.5.13.6. Helicopter Sling Loads.

The PERM system shall be operable and shall meet all requirements after exposure to helicopter sling load transportation.

3.5.14. Shock.

3.5.14.1. Rail Impact.

The PERM system shall meet all requirements after rail impact.

3.5.14.2. Handling Drop.

The PERM system shall be safe for disposal after exposure to a single free fall drop in any orientation (e.g., edge, corner, end, etc.) from a height of 9 feet (2.74 meters).

3.5.14.3. Transit Drop.

The PERM system shall meet all requirements after exposure to transit drops from all positions (e.g., edge, corner, end, etc.) from a height of 7 feet (2.14 meters) onto a concrete surface.

3.5.14.4. Shipboard Shock.

The PERM system shall meet all requirements after exposure to the shipboard near miss shock environment.

3.5.15. Decompression.

The PERM system shall present no hazards to aircraft or personnel after exposure to rapid and explosive decompression.

3.5.16. Ice.

The PERM system shall meet all requirements and sustain no physical damage after exposure to clear glaze ice with a thickness of 13 mm.

3.5.17. Electromagnetic Environmental Effects (E3).

The PERM system shall meet the Electromagnetic Environment (EME) requirements of MIL-STD-464 as tailored via the following paragraphs.

3.5.17.1. Electromagnetic Compatibility/Electromagnetic Interference (EMC/EMI).

The PERM system shall meet the EMC/EMI requirements as defined in MIL-STD-461, Table V (Ground, Army), to include CE102, CE106, CS101, CS114, CS115, CS116, RE102, RE103, RS101, and RS103 and MIL-STD-461, requirement RS103, 2 MHz to 40 GHz.

3.5.17.2. Electromagnetic Vulnerability.

The PERM system in its unpackaged configuration shall suffer no damage or unacceptable performance degradation and shall also be electromagnetically compatible with its defined external RF EME such that its operational performance requirements are met.

3.5.17.3. Lightning.

The PERM system shall meet all operational performance requirements for both direct and indirect effects of lightning. Ordnance shall meet its operational performance requirements after experiencing a near strike in an exposed condition and a direct strike in a stored condition. Ordnance shall remain safe during and after experiencing a direct strike in an exposed condition.

3.5.17.4. DC Magnetic Fields.

The PERM system shall not be degraded after exposure to the operational DC magnetic fields.

3.5.17.5. Electrostatic Discharge (ESD).

The PERM system shall safely control and dissipate the buildup of electrostatic charges to avoid detonation or dudding of ordnance hazards, to protect personnel from shock hazards, and to prevent performance degradation or damage to electronics. The safety and performance of the electronics or Electro-Explosive Devices (EEDs) shall be unaffected when the PERM system is subjected to ESD.

3.5.17.5.1. Helicopter Transport ESD.

The PERM system in its packaged configuration shall meet all requirements after being subjected to the ESD environment of 300,000 volts.

3.5.17.5.2. Personnel ESD.

The PERM system in its unpackaged configuration shall meet all requirements after being subjected to the personnel handling ESD environment of 25,000 volts.

3.5.17.6. Hazards of Electromagnetic Radiation to Ordnance.

The PERM system Electrically Initiated Devices (EIDs) shall not be inadvertently actuated during or experience degraded performance after exposure to the external EME levels of MIL-STD-464, Table 9 for both direct RF induced actuation of the EID and inadvertent activation of an electrically powered firing circuit.

3.5.18. Chemical Biological Radiological and Nuclear (CBRN).

The PERM system design shall preclude materials that render it inoperable after exposure to CBRN contamination or decontamination using standard materials and procedures as defined in FM 3-11.5, CBRN Decontamination.

3.6. Materials, Parts, and Processes.

3.6.1. Selection.

a. Approval of the Procuring Activity shall be required for the use of critical and strategic materials as defined and managed by Defense Logistics Agency’s Strategic Materials Program.

b. The selection of specifications and standards for materials, processes, and parts for use in the design shall be in accordance with industry best practices.

3.6.2. Standardization.

a. The supplier shall make maximum use of existing specifications and standards.

b. The number of different types and sizes of hardware shall be kept to the minimum practicable.

c. Nonstandard materials, processes, and parts selected for use shall be equivalent to or better than similar standard materials, processes, or parts.

d. Parts and materials that have been qualified to military standards shall be used to the maximum extent possible whenever they are suitable for the intended purpose.

3.6.3. Toxicity, Radioactivity, Carcinogenicity.

a. Materials, which by construction or usage produce toxic effects under any conditions of service, including maintenance, shall be prohibited.

b. The approved materials shall have no adverse effect on the health of personnel when used for the purpose intended.

c. Use of mercury in any form shall be prohibited.

d. Use of any radioactive materials shall require advance Procuring Activity approval.

e. Suspected carcinogens as specified in 29 CFR 1910.1000-1910.1017 shall be prohibited.

f. Use of lithium for any purpose other than a constituent in a battery shall require advance Procuring Activity approval.

g. Any lithium batteries shall meet the requirements of NAVSEA S9310-AQ-SAF-010.

h. Use of Magnesium shall require advance Procuring Activity approval.

3.6.4. Susceptibility.

a. Materials shall be corrosion and fungi resistant to the extent that deterioration during storage does not require renovation or rework to restore the AUR to service.

b. Non-nutritive materials shall be used where possible.

c. Materials that are nutrients for fungi are permitted if used inside of hermetically sealed assemblies and other accepted and qualified uses.

d. If employed, nutrient susceptible materials shall be treated by a method that shall render the resulting exposed surface fungi-resistant.

e. Protective materials used shall be inherently moisture and fungi-resistant.

f. Any supplemental protective coatings shall be resistant to damage or loss during the normal course of inspection, maintenance, periodic tests and/or handling of dissimilar metals.

3.6.5. Dissimilar Metals.

a. The use of dissimilar metals in contact with each other and exhibiting a potential difference (anodic index) in excess of 0.25-volts shall be prohibited.

b. Galvanic couples shall be protected with compatible plating, finishes, insulation tapes, sealants, etc. to prevent electrolytic deterioration in the presence of moisture.

3.6.6. Corrosion.

a. The AUR shall be designed to resist corrosion in transportation/depot maintenance state.

b. The AUR design shall include features to protect exposed and non-exposed metal surfaces from corrosion due to exposure to salt water and salt fog for periods consistent with "Lifecycle Environmental Profile for the Future Expeditionary Fire Support System (EFSS)".

c. Preventative maintenance attributes for the AUR shall include the capacity for corrosion preventative maintenance.

d. Fasteners and accessory parts shall be corrosion resistant.

3.6.7. Reliability.

a. Wiring, printed wiring, solder, flux, connectors, terminals, boards, fasteners, and components shall be selected for high reliability use.

b. The design, construction, and workmanship of any electronics shall be subject to an ESS program developed using MIL-HDBK-344 as guidance.

3.6.8. Plastic.

a. Plastic laminates containing a cotton-fabric base shall be prohibited.

b. Plastic molding compounds containing cellulose products shall be prohibited.

c. Plastic materials shall be cured prior to installation to minimize out gassing during storage.

d. When two or more materials or curing processes are candidates, testing for volatile loss shall be accomplished in accordance with ASTM E595 for comparison of out gassing.

3.6.9. Adhesives.

a. All adhesives shall be water resistant types.

b. All adhesives shall be durable under all service conditions

c. Adhesives containing corrosive substances shall be prohibited.

3.6.10. Marking.

Ink used for marking shall be smudge proof.

3.6.10.1. Identification.

a. The AUR and subject parts, components, and assemblies shall be marked for identification in accordance with MIL-STD-129 and MIL-STD-130 by permanent methods.

b. Identification methods shall be insensitive to environmental or other conditions specified herein.

3.6.10.2. Safety.

Instructions for use, cautions, or warnings shall be so labeled in readily observable, contrasting colors.

3.7. Design and Construction.

The terms used in this specification are defined as follows:

a. Factor of Safety - The multiplication factor, applied as a design condition, on the limit load, stress, pressure or temperature to provide reserve strength for safety and reliability.

b. Limit Load. Limit Stress, Limit Pressure, or Limit Temperature - The actual maximum load, stress, pressure or temperature occurring during a design condition.

c. Yield Load, Yield Stress, or Yield Pressure - The product of the limit load or limit stress or limit pressure and the yield factor of safety.

d. Ultimate Load, Ultimate Stress, or Ultimate Pressure- The product of the limit load or limit pressure and the ultimate factor of safety.

e. Allowable Yield Load or Allowable Yield Stress - The maximum load or stress to which a structural member may be subjected without undergoing permanent deformation in excess of a specific amount of strain (inch-per-inch). For most metal, the yield point stress is defined as 0.002 inch-per-inch of permanent strain.

f. Allowable Ultimate Load or Allowable Ultimate Stress - The maximum load or stress to which a structural-member may be subjected without failure.

g. Margin of Safety - The factor by which the actual strength of a structural member exceeds the required strength as induced by either the yield load or ultimate load acting on it.

Margin of Safety* = -1

*Including combined loadings.

3.7.1. Loads Requirements.

a. The individual acting maximum design limit loads and applicable combinations of design limit loads shall be determined.

b. The projectile shall be capable of performing all of its intended functions when subjected to the limit loads, stress, pressure, and temperature conditions. The critical combination of the design loads with applicable factors of safety and casting factors in addition to the thermal effects, which occur simultaneously, shall be applied to the design and achieve a positive margin of safety.

3.7.2. Factors of Safety.

The following minimum factors of safety shall be applied to the limit load, stress, pressure, and temperature conditions:

Yield Factor of Safety Ultimate Factor of Safety

3.7.3. Casting Factors.

Casting factors shall be utilized wherever a cast structure is to be used in the design. Employment of the casting factor shall be in addition to the safety factors previously discussed and is intended to compensate for possible degraded structural performance of the casting as a result of imperfections. Factors shall be applied according to the grade (in accordance with AMS-STD-2175) of the casting.

NOTE: These factors to be used for tensile and shear stresses only.

3.7.4. Material Properties.

Mechanical and physical properties of the material shall be defined. Allowable stresses shall incorporate such effects as temperature, material processes, and manufacturing techniques, as well as time dependent effects such as creep and environmental aging deterioration. For the solid propellant, allowable stresses and strains shall also include the effects of aging and strain rate. Where applicable allowable strength data are not available, substantiating tests using appropriate procedures shall be conducted and reported in reference documents. The allowable yield and ultimate stress values shall be determined as follows:

a. For a single load path structure, the minimum guaranteed values shall be used.

b. For multiple load path structures, the 90 percent probability values (with upper and lower bounds of the mean and standard deviation) shall be used when available.

3.7.5. Margin of Safety.

A positive margin of safety based on the yield and ultimate factors of safety shall be demonstrated through the appropriate analysis techniques.

3.7.6. Finish.

The AUR finish shall be non-reflective. The AUR finish shall not be affected by normal handling, water and hydrocarbons. Ammunition marking shall be IAW MIL-STD-709 w/ Change 1

3.8. Safety.

The manufacturer shall identify, mitigate, and adjudicate all potential safety hazards in the design of the AUR in compliance with MIL-STD-882.

a. The AUR shall be designed to the maximum extent possible to preclude safety hazards to personnel and equipment in its manufacturing, handling, testing, demilitarization, disposal and operational use.

b. The AUR shall present no uncontrolled hazards to the system section or maintainers under all authorized operational conditions

c. The AUR design shall preclude introduction of unacceptable environmental conditions or hazardous materials.

d. Hazard classification testing and identification number assignment shall be in accordance with NAVSEAINST 8020.8.

3.8.1. Insensitive Munitions.

The PERM system, AUR and all associated components design shall minimize the system's reaction violence and collateral damage as specified in MIL-STD-2105 when subjected to unplanned stimuli.

3.8.2. Failure Modes.

The AUR shall be designed so that no single failure (human, mechanical, or electrical) will produce an unacceptable hazard as defined in Paragraph A.4.3.3.1.1 of MIL-STD-882.

3.8.3. Environmental Safety Effects.

During or following exposure to the non-operating environments encountered during storage, transportation, and handling conditions, AUR design shall preclude safety hazards at…