NAVY MIL-STD-2088 B CHANGE 1-2012 BOMB RACK UNIT (BRU) SINGLE STORE AIRCRAFT.pdf

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1、 AMSC N/A FSC 1095 DEPARTMENT OF DEFENSE DESIGN CRITERIA STANDARD BOMB RACK UNIT (BRU), SINGLE STORE, AIRCRAFT MIL-STD-2088B w/CHANGE 1 19 October 2012 SUPERSEDING MIL-STD-2088B 29 May 2007 INCH-POUND Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-M

2、IL-STD-2088B w/CHANGE 1 ii FOREWORD 1. This standard is approved for use by all Departments and Agencies of the Department of Defense. 2. Comments, suggestions, or questions on this document should be addressed to: Commander, Naval Air Warfare Center Aircraft Division, Code 4L8000B120-3, Highway 547

3、, Lakehurst, NJ 08733-5100 or emailed to michael.sikoranavy.mil. Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at https:/assist.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted witho

4、ut license from IHS-,-,-MIL-STD-2088B w/CHANGE 1 iii SUMMARY OF CHANGE 1 MODIFICATIONS 1. Added SINGLE STORE to title page of Standard. 2. In Table I, added type III Bomb Rack Unit (BRU) that uses single suspension point with a weight limit of 100 pounds (primarily for Unmanned Aerial Vehicles UAVs)

5、. 3. Prohibited the use of Materials listed in MIL-HDBK-1587, table I in 4.2.1.1 Metal parts. 4. Changed 4.2.1.6 and 4.2.1.7 handbooks cited, MIL-HDBK-454 and MIL-HDBK-1568, from requirements to guidance language. 5. Changed MIL-HDBK-454 Guideline 5 to IPC J-STD-001, Class 3 in 4.2.1.11 Soldered or

6、brazed connections. 6. Changed MIL-HBDK-46855 to MIL-STD-46855 in 4.3.9 Human engineering. 7. Added to 4.3.11.1: “Note: Maximum maintenance time applies at the 95thpercentile. 8. Added 4.3.12 U.S. Army unique requirements. 9. Added Construct #1 to MIL-STD-130 requirement and serialization requiremen

7、t for BRU in 4.5. 10. Added store vertical support requirements for type III BRU to 5.1.2 Store vertical support. 11. Added frangible attachment for Type III BRUs to 5.1.2.1 Vertical Support Latching. 12. Added new Figure 4 Single vertical support spacing, Type III BRU. 13. Added Type III BRU design

8、 information to 5.1.4 Fuzing and arming control. 14. Added “and Type III (as applicable)” to 5.1.4.1 Mechanical fuze AUs. 15. Added minimum number of two positive arming attachments for Type III BRUs to 5.1.4.3 Positive arming attachment. 16. Added new table II Store diameters under 5.1.5 Swaybraces

9、, which includes the diameters for Type III BRUs. 17. Added sentence to 5.1.6 Safety interlock stating “A mechanical store support latch interrupt is not required for frangible attach points.” 18. Added “(when required)” to third sentence of 5.1.6.1 Safety interlock status. This refers to the mechan

10、ical interrupts not required for frangible points (see 17 above). 19. Added 5.1.6.9 Frangible attach point mechanical safety. 20. Added 5.1.6.10 Frangible attach point electrical safety. 21. Changed 5.1.8.1a from Roman numerals to Arabic numbers. 22. Changed 5.1.9.1 from EMCAS to E3 Working Group; E

11、MCPP to E3IAR (E3 Integration and Analysis Report). 23. Minor editing of 5.1.9.2.1 Electromagnetic pulse (EMP). 24. Deleted 5.1.9.6 Wiring and Cabling and renumbered subsequent paragraphs. 25. Deleted 5.1.9.9 Coupling factor (CF). 26. Changed 5.2.6 , line 3, to state: a current of one ampere for mor

12、e than 1 second at 23 C and added “ Electric bomb fuzing is not required for Type III BRUs.” 27. Added single lug suspensions for manned and unmanned aircraft to 6.1 Intended use. 28. Updated 6.2 Subject term (key word) listing with additional key words. 29. Listing of international standardization

13、agreements changed from Table II to Table III. 30. 6.4 Change notations are now vertical lines versus no marginal notations previously stated. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-2088B w/CHANGE 1 ivSUMMARY OF CHANGE 1 MODIFICATION

14、S - Continued PARAGRAPH MODIFICATION Title page Changed 1.1 Changed Table I Changed 4.2.1.1 Changed 4.2.1.6 Changed 4.2.1.7 Changed 4.2.1.11 Changed 4.3.9 Changed 4.3.11.1 Changed 4.3.12 Added 4.5 Changed 5.1.2 Changed 5.1.2.1 Changed Figure 4 Added 5.1.4 Changed 5.1.4.1 Changed 5.1.4.3 Changed 5.1.

15、5 Changed Table II Added 5.1.6 Changed 5.1.6.1 Changed 5.1.6.9 Added 5.1.6.10 Added 5.1.8.1a Changed 5.1.9.1 Changed 5.1.9.2.1 Changed 5.1.9.6 Deleted 5.1.9.7 Changed and Renumbered to 5.1.9.6 5.1.9.9 Deleted 5.2.6 Changed 6.1 through 6.4 Changed Provided by IHSNot for ResaleNo reproduction or netwo

16、rking permitted without license from IHS-,-,-MIL-STD-2088B w/CHANGE 1 vCONTENTS PARAGRAPH PAGE 1. SCOPE 1 1.1 Scope . 1 1.1.1 International coordination . 1 2. APPLICABLE DOCUMENTS . 1 2.1 General 1 2.2 Government documents . 1 2.2.1 Specifications, standards, and handbooks . 1 2.2.2 Other Governmen

17、t documents, drawings, and publications 3 2.3 Non-government publications . 5 2.4 Order of precedence 6 3. DEFINITIONS . 6 3.1 Aircraft store 6 3.2 Bomb Rack Unit (BRU) 7 3.3 Burst pressure 7 3.4 Ejections 7 3.5 Flight hours 7 3.6 Gravity release . 7 3.7 Latch 7 3.8 Loading 7 3.9 Operating cycles 7

18、3.10 Operating hours . 7 3.11 Pressure vessel . 7 3.12 Primary release 7 3.13 Proof pressure 7 3.14 Secondary release 7 3.15 Single point safetying 8 3.16 Swaybracing 8 3.17 UAV 8 3.18 Vertical supports 8 4. GENERAL REQUIREMENTS . 8 4.1 BRU types . 8 4.2 Selection of materials, specifications, stand

19、ards and drawings . 8 4.2.1 Materials 8 4.2.1.1 Metal parts . 9 4.2.1.1.1 Heat treatment . 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-2088B w/CHANGE 1 viCONTENTS (Continued) PARAGRAPH PAGE 4.2.1.1.2 Castings . 9 4.2.1.1.3 Forgings . 9

20、4.2.1.2 Non-metallic components 9 4.2.1.2.1 Reinforced plastic and structural composites 9 4.2.1.3 Lubrication 9 4.2.1.4 Hydraulic fluids . 10 4.2.1.5 Fungus-proof materials 10 4.2.1.6 Potting compounds 10 4.2.1.7 Corrosion protection 10 4.2.1.8 Finishes 10 4.2.1.8.1 Anodizing 10 4.2.1.8.2 Chemical

21、surface treatment . 10 4.2.1.8.3 Plating 10 4.2.1.9 Electrical connectors . 10 4.2.1.10 Wiring 11 4.2.1.11 Soldered or brazed connections . 11 4.2.2 Drawings . 11 4.3 General design requirements . 11 4.3.1 BRU to aircraft installation . 11 4.3.2 Design factors of safety . 11 4.3.2.1 Yield 11 4.3.2.2

22、 Ultimate . 11 4.3.2.3 Pressure system . 11 4.3.3 Structural load requirements . 12 4.3.3.1 Take-off and landing loads 12 4.3.3.2 Captive flight loads . 12 4.3.3.3 Launch loads 12 4.3.3.4 Jettison loads . 12 4.3.3.5 Cyclic loads . 12 4.3.4 Stress analysis 12 4.3.5 Service life . 12 4.3.6 Reliability

23、 13 4.3.7 Shelf life 13 4.3.8 Interfaces . 13 4.3.8.1 BRU to aircraft interface . 13 4.3.8.2 BRU to store interface . 13 4.3.8.3 Electrical grounding interface . 13 4.3.8.3.1 BRU to aircraft structure grounding 13 Provided by IHSNot for ResaleNo reproduction or networking permitted without license f

24、rom IHS-,-,-MIL-STD-2088B w/CHANGE 1 viiCONTENTS (Continued) PARAGRAPH PAGE 4.3.8.3.2 BRU internal ground interface 13 4.3.9 Human engineering . 13 4.3.10 Environmental and service conditions 15 4.3.11 Maintainability 15 4.3.11.1 Maximum maintenance time . 15 4.3.11.2 Ejector system maintainability

25、15 4.3.11.2.1 Pyrotechnic BRU . 15 4.3.11.2.2 Pneumatic or hydraulic BRU 16 4.3.11.2.2.1 Pressure vessel . 16 4.3.11.2.2.2 Removable pressure vessel 16 4.3.11.3 Ejector system component maintenance time . 16 4.3.11.3.1 Pyrotechnic ejection 16 4.3.11.3.2 Pneumatic or hydraulic ejection 16 4.3.11.4 Ma

26、intenance plan 17 4.3.11.4.1 Organizational maintenance 17 4.3.11.4.1.1 Organizational maintenance tasks . 17 4.3.11.4.2 Intermediate maintenance 17 4.3.11.4.2.1 Intermediate maintenance tasks . 17 4.3.12 U.S. Army unique requirements 18 4.4 Interchangeability 18 4.5 Identification and marking 18 5.

27、 DETAILED REQUIREMENTS 18 5.1 Loading of stores . 18 5.1.1 Support Equipment (SE) . 19 5.1.2 Store vertical support . 19 5.1.2.1 Vertical support latching . 19 5.1.2.2 Vertical support latching security 24 5.1.3 Store sensing 24 5.1.3.1 Store sensing failure mode 24 5.1.4 Fuzing and arming control 2

28、4 5.1.4.1 Mechanical fuze AUs 24 5.1.4.2 Electrical fuze AU . 25 5.1.4.3 Positive arming attachment . 26 5.1.5 Swaybraces 26 5.1.6 Safety interlock 27 5.1.6.1 Safety interlock status . 27 5.1.6.2 Interrupt removal . 27 Provided by IHSNot for ResaleNo reproduction or networking permitted without lice

29、nse from IHS-,-,-MIL-STD-2088B w/CHANGE 1 viiiCONTENTS (Continued) PARAGRAPH PAGE 5.1.6.3 Alternative interrupt removal 28 5.1.6.4 Safety interlock ground operation . 28 5.1.6.5 Safety interlock control . 28 5.1.6.6 Safety interlock drive mechanism . 28 5.1.6.7 Safety interlock override system . 29

30、5.1.6.8 Additional release operation interrupts . 29 5.1.6.9 Frangible attach point mechanical safety 29 5.1.6.10 Frangible attach point electrical safety 29 5.1.7 Store release and ejection system 29 5.1.7.1 Gravity release BRUs 30 5.1.7.2 Pyrotechnic actuated BRUs . 30 5.1.7.2.1 Cartridges 30 5.1.

31、7.2.2 Cartridge firing pin 31 5.1.7.2.3 Cartridge breech 31 5.1.7.3 Pneumatic/hydraulic activated BRUs 32 5.1.7.3.1 Pneumatic interface . 34 5.1.7.3.2 Pneumatic activated BRUs with removable energy source . 34 5.1.7.4 Ejection force 34 5.1.7.5 Separation parameters . 35 5.1.7.6 Ejector pistons . 35

32、5.1.8 Safety in design . 35 5.1.8.1 BRU safety program 35 5.1.8.1.1 Safety program functions 35 5.1.8.1.2 Failure modes, effects and criticality analysis . 36 5.1.8.1.3 Inadvertent release . 36 5.1.8.1.4 Locked shut functioning 36 5.1.8.1.5 Driven items 36 5.1.8.1.6 Impulse cartridges . 36 5.1.8.1.7

33、 Pneumatic or hydraulic BRU safety requirements 36 5.1.9 Electromagnetic environmental effects (E3) 37 5.1.9.1 Electromagnetic compatibility (EMC) program 37 5.1.9.2 Electromagnetic interference (EMI) 37 5.1.9.2.1 Electromagnetic pulse (EMP) . 37 5.1.9.3 Electromagnetic vulnerability EMV . 37 5.1.9.

34、4 Lightning protection 37 5.1.9.5 Bonding and grounding . 37 5.1.9.6 Static electricity . 38 5.1.9.7 Hazards of electromagnetic radiation to ordnance (HERO) . 38 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-2088B w/CHANGE 1 ixCONTENTS (Con

35、tinued) PARAGRAPH PAGE 5.2 Electrical requirements 38 5.2.1 General 38 5.2.2 BRU structural ground 38 5.2.3 Nose arm 38 5.2.4 Center arm . 38 5.2.5 Tail arm . 38 5.2.6 Electrical fuzing 38 5.2.7 Primary release command . 39 5.2.7.1 Impulse cartridge . 39 5.2.7.2 Solenoid release . 39 5.2.8 Secondary

36、 release command . 39 5.2.9 Auxiliary release command . 39 5.2.10 Safety interlock electrical requirements 39 5.2.10.1 Safety interlock mechanism status 39 5.2.10.2 Safety interlock drive mechanism electrical power 39 5.2.10.3 Safety interlock override status . 39 5.2.10.4 Cartridge actuated device

37、(CAD) override control . 40 5.2.11 Vertical support status . 40 5.2.12 BRU presence status 40 5.2.13 Store sensing signal . 40 5.2.14 BRU power/master arm . 40 6. NOTES 40 6.1 Intended use . 40 6.2 Subject term (key word) listing . 40 6.3 International standardization agreement implementation . 41 6

38、.4 Change notations . 41 CONCLUDING MATERIAL . 42 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-2088B w/CHANGE 1 xFIGURE PAGE 1. 14-inch vertical support spacing Type I, two-piston bomb rack unit (BRU) geometric relationships 20 2. 14/30-in

39、ch vertical support spacing Type II, two-piston bomb rack unit (BRU) geometric relationships 21 3. 14-inch vertical support spacing Type I, single-piston bomb rack unit (BRU) geometric relationships 22 4. Single vertical support spacing Type III, bomb rack unit (BRU) geometric relationships . 23 5.

40、Wiring schematic to achieve primary and secondary release 31 6. Initiation circuits to activate redundant energy source control devices . 34 TABLE PAGE I. Carriage characteristics of BRU types . 8 II. Suspension diameters . 26 III. Paragraphs containing international standardization agreements 42 Pr

41、ovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-2088B w/CHANGE 1 1 1. SCOPE 1.1 Scope. This standard establishes the general guidelines and criteria for the design and development of a single store bomb rack unit (BRU) for carriage and release

42、of airborne stores (excluding air-to-air missiles) from fixed wing and rotary wing aircraft using a single suspension point or suspension points spaced at 14 or 30 inches. This standard addresses detailed requirements for gravity (non-ejected), pyrotechnic, hydraulic, and pneumatic powered BRUs. Mec

43、hanical aircraft armament interoperable interfaces are incorporated to enhance cross utilization and servicing capabilities between military aircraft and aircraft stores (see 3.1) of all services of the Department of Defense (DoD) and North Atlantic Treaty Organization (NATO) nations. 1.1.1 Internat

44、ional coordination. Included in this standard are certain DoD acceptable interface configurations that are approved or currently undergoing international coordination and are incorporated into appropriate International standardization documents (see 6.3). 2. APPLICABLE DOCUMENTS 2.1 General. The doc

45、uments listed in this section are specified in sections 4 or 5 of this standard. This section does not include documents cited in other sections of this standard or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, docume

46、nt users are cautioned that they must meet all specified requirements of documents cited in sections 4 or 5 of this standard, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part o

47、f this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. INTERNATIONAL STANDARDIZATION AGREEMENTS STANAG 3575 - Aircraft Stores Ejector Racks (Copies of the STANAG are under controlled distribution. Inf

48、ormation may be obtained from the Air Force International Standardization Office, HQ USAF/A5XX-ISO, 1101 Wilson Blvd., Suite 1015, Arlington, VA 22209-2211 or email to asccmcuspentagon.af.mil.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-2088B w/CHANGE 1 2FEDERAL SPECIFICATION L-P-383 - Plastic Material, Polyester Resin, Glas