1、MIL-C-27410 = 9999906 1741302 55 W MIL-C-27410(USAF) 15 November 1966 MILITARY SPECIFICATION COMPONENTS, ROCKET PROPULSION FLUID SYSTEM, GENERAL SPECIFICATION FOR 1. SCOPE 1.1 Scope. This specification covers the requirements and instruc- tions for preparation of the manufacturers mode specification
2、 for all components of a rocket propulsion system which control the pressure or flow of ullage, gas, pressurizing gas, propellants, combustion products, or hydraulic f hid. Specifically excluded from this specification are tankage, turbo machinery, injectors, thrust chambers, nozzles, and gas genera
3、tors. 2. APPLICABLE DOCUMENTS. 2.1 The following documents of the issue in effect on date of invitation for bids or request for proposal, form a part of this cpeci- fication to the extent specified herein. SPECIFICATIONS Military MIL-P-116 Preservation, Methods of MIL-D-1000 Drawings, Engineering an
4、d Associated Lists MIL-S-4040 Solenoid, Electrical, General Specifi- cation For MIL-E-5272 MIL-C-6021 MIL-1-6181 Environmental Testing, Aeronautical and Associated Equipment, General Specification For Castings, Classification and Inspection of Interference Control Requirements, Aircraft Equipment MI
5、L-P-6906 Plates, Identification MIL-S-7 742 Screw Threads, Standard, Optimum Selected Series; General Specifi- cation For - - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-27430 M 9999906 3743303 791 MIL-C-27410 (USAF) 1 NIL-W-8160 mL-E-8189
6、MIL-S-8879 MIL-M- 9 95 O MIL-N-25027 %IL-E-25366 MIL-H-25475 MIL-P-2 7 4 07 MIL-P-27409 STANDARDS Military ?lIL-STD-129 MIL-STD-130 MIL-STD-143 MIL-STD-446 MIL-STD-454 MIL-STD-785 Wirina, Guided Yissile, Installation of, General Specification For Electronic Equipment, Guided Missiles, General Specif
7、ication For Screw Threads, Controlled Radius Root with Increased Minor Diameter: General Specification For Missile Component, Liquid Oxygen Nitrogen Gaseous Oxygen, Instrument Air, Helium and Fuel Handling Systems, Cleaning and Packaging for Delivery Nut, Self-Locking, 250 Deg. F, 450 Deg. F, and 80
8、0 Deg. F, 125 KCI FTU, 60 KSI FTU, and 30 KSI PTU Electric and Electronic Equipment and Systems, Guided Xissiles, Installation of, General Specification For Hydraulic Systems, Xissile. Design, Installation Tests, and Data Require- ments, General Requirements For Propellant, Pressurizing Agent, Heliu
9、m Propellant Feed System, Rocket Propulsion, General Specification For Marking for Shipment and Storage Identification Harking of U. S. Military Property Specifications and Standards Order of Precedence for the Selection of Environment or Electronic Parts, Tubes and Solid State Devices Standard Gene
10、ral Requirements for Electronic Equipment Reliability ProKram for Systems, Subsystems, and Equipment 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_ - MIL-C-27410 9 9999906 1741304 628 MIL-STD-810 Environmental Test Fkthods for Aerospace and Grou
11、nd Equipment MS 33540 Safety Wiring, General Practices For MS 33588 Nuts and Plate Nuts, Self-Locking, Air- craft Design and Usage Limitations of PUBLICATIONS Air Force - Navy Aeronautical Bulletins No. 343 No. 438 No. 445 Specifications and Standards Applicable to Aircraft Engines and Propellers, U
12、se of Age Controls of Age-Sensitive Elastomeric Items Engineering Changes to Weapons, Systems, Equipment , and Facilities 3, REQUIREI.IENTS 3.1 General. 3.1.1 Model specifications. A model specification conforming to the Appendix specified herein shall be prepared by the contractor or nianufac- ture
13、r for approval by the procuring activity (6.3.8). 3.1.2 Pre-production. Prior to initiating production of components for use in f lght systems components shall have suecescfully completed the Qualification tests (4.2.2). 3.1.3 Changes. The contractor shall notify the procuring acclvi.ty of any propo
14、sed design changes to the component as defined in the model speci- fication. Following successful completion of the Qualification tests, no change shall be made except when such changes are made in accordance with ANA Bulletin No. .445 or procurement activity requirements as applicable. Approval of
15、changes does not relieve the contractor from full responsibility for the effects of the changes on the component performance. 3.1.4 Selection of specifications and standards. Specifications and standards for necessary commodities and services not specified herein shall be selected in accordance with
16、 MIL-STD-143. 3.2 Materials and processes. The materials and processes used in the manufacturer of components shall conform to the applicable Specifications, in accordance with paragraph entitled “Material Specifications! of ANA Bulletin No. 343 and shall be selected from the list of materials and p
17、ro- -cc cesses apriroWy the procuring activity for the specific application. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-27420 M 9999906 1341305 564 9 MIL-C-27410 (USAF) 3.2.1 Hetals. Metals shall be compatible vith fluids (3.4.81, fluid
18、vapors, fluid decomposition products, products of combustion where applicable, and with environments to which subjected. In addition, they shall not deteriorate in normal usage and storage. The use of dissimilar metals, especially brass, copper, or steel in contact with aluminum alloy, shall be avoi
19、ded where practicable. Protection of dissimilar metal combinations shall be in accordance with MIL-STD-454 Requirement 16. 3.2.2 Rubbers, plastics, and elastomers. Rubbers, plastics, and elastomers shall be compatible with fluids (3.4.81, fluid vapors, fluid decomposition products, products of combu
20、stion where applicable, and with environments to which subjected. parts shall be in accordance with ANA Bulletin No. 438. Age control of synthetic rubber 3.2.3 Lubricants. Propulsion system components shall not require added lubrication during their normal service life (6.3.11). Ail com- ponent wear
21、 surfaces in contact with system fluids shall not require additional lubrication other than the system fluid itself. Lubricants shall be compatible with fluids. fluid vapors, fluid decomposition products, products of combustion where applicable, and with environments to which subjected. 3.2.4 Finish
22、es. All finishes, surface treatment, plating, coatings, or paints shall be specified in the model specification. 3.3 Performance characteristics. The performance Characteristics, including the intended application and the fluid system interactions, shall be specified in the model specification. as a
23、 minimum. The following shall be included 3.3.1 Operating attitude. Components shall be capable of meeting the performance characteristics specified in the model specification when operated in any attitude the components may be exposed to during their operating life (6.3.6). model specification. The
24、 operating attitudes shall be specified in the 3.3.2 Life characteristics. The component operating and storage life (6,3.12) characteristics shall be specified in the model specifi- cation. 3.3.2.1 Storage life. All rocket fluid system components shall have a minimum required storage life (non-opera
25、ting) of 5 years. The internal and external environmental extremes to be encountered during storage shall be specified in the model specification. Where the component is in contact with propellants or actuating fluids during storage, it shall not degrade these fluids. 3.3.2.2 Operating life. The ope
26、rating life shall be specified in the model specification, and shall include acceptance testing, system checkout tests, and propulsion system operation. e t I a * e Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- _- MIL-C-274LO 9999906 II74II306 4TO
27、 MIL-C-2 74 10 (USAF) 3.3.3 Leakape. The maximum component leakage (internal and external) and measurement technique shall be specified in the model specification. Where fuel and oxidizer are controlled in a single component, seal leakage shall be ducted such that: mixing of fuel and oxidizer within
28、 the component is precluded. 3.3.4 Flow characteristics. Component flow characterictics shall be specified in the model specification and shall include flow rate versus pressure drop at given temperature for various percentages of maximum flow, or flow rate versus percentage maximum flow position of
29、 the control element at given temperature and pressure drop. 3.3.5 Actuation. The method of actuation, response characteristics from application of actuation signal to fully open and closed conditions, first order time constant, repeatability of the response characteristics, time from valve first mo
30、vement to fully open or closed position, and the control mode, i.e. digital, proportional, etc., shall be specified in the model specification. 3.3.6 Power. The power range (electrical, hydraulic, pneumatic or other) for which the component must meet the actuation requirements, over the operating te
31、mperature range; the tolerances and characteristics of the power available to the component; and the maximum power to which the component may be subjected shall be specified in the model specification. 3.3.7 Stability characteristics, Stability characteristics to include overshoot, undershoot, dampi
32、ng, and dead band conditions shall be specified in the model specification. 3.3.8 Filtration. Nominal (6.3.5) and absolute filtration (6.3.1) along with the dirt holding capacity at rated flow and pressure drop of all filter elements shall be specified in the model specification. 3.3.9 ?raining. Dra
33、inage provisions shall be made so that propellants cannot be trapped during unloading (ground only). All components for cryo- genic service shall have provisions for relieving pressure from any trapped compartments, shall be specified. Maximum spillage which may occur in disconnect operations 3.4 De
34、sign. Components shall be designed to provide high inherent reliability (6.3.10), permit use of proven manufacturing processes and positive inspection at each level of manufacture, have low susceptability to assembly errors, minimize variation of performance caused by manufac- turing tolerances, and
35、 minimize weight while achieving the performance characteristics (3.3) specified in the model specification, when subjected to the expected operating environment. 3.4.1 Misalignment. Maximum allowable interface loads on the Component caused by axial, lateral, and angular misalignments in the tubing
36、or the support structure under the most severe environmental condition including any influences from deflection or misalignment accomodation features shall be specified in the model specification. i_ -3 ;- is temperature to account for the re- duced physical properties. 3.4.5 Installation characteri
37、stics. Yountinp; details; overall dimensions; location, size and type of plumbing and electrical connections; servicing clearances, weight, center of gravity, and flov directions shall be specified in the model specification. 3.4.6 Environment. The environments the component will experience in fligh
38、t, i.e. vibration, acceleration, temperature and altitude, as well as the non-operating environments such as shipping vibration and shock, thr natural environments of the launch and test sites, and the launch environ- ment for upper stage systems components shall be specified in the model specificat
39、ion. 3.4.7 Contamination. Contamination levels and quantities of contami- nants at each particle size level, which the component raust be capable of accepting without degradation in performance, shall be specified in the model specification. However, the levels and quantities of contaminants should
40、not be less than the maximum allowed in the Dropellant specification. 3.4.8 Fluids. The chemical composition, allowable contamination levels (solids, liquids and gas), pressure and temperature ranges, and flow rates shall be specified for the actuating, workins and test fluids. The contamination lev
41、el specified shall be the maxirnum allovable far pro- pulsion system operation (as opposed to the contamination levels called out in the fluid procurement specification) . 3.5 Construction. 3.5.1 Threaded connections and attachments. 6 Provided by IHSNot for ResaleNo reproduction or networking permi
42、tted without license from IHS-,-,-MIL-C-27430 979990b 3743308 273 3.5.1.1 Locking provisions. All threaded members such as nuts, screws, and bolts shall be provided with safety wiring or other acceptable means of locking. of being locked securely enough to prevent disturbance of setting under all se
43、rvice and test conditions. and shall be used in accordance with MS 33588. Safety wiring shall comply with the requirements of MS 33540. shall be avoided unless they can be shown to have superior characteristics to the more conventional methods and approval is obtained from the procuring activity . A
44、ny adjustments which may be provided shall be capable Self-locking nuts shall conform to MIL-N-25027 The use of staking and lock washers 3.5.1.2 Pipe threads. 3.5.1.3 Threads. Conventional straight screw threads shall conform to MIL-S-7742 or MIL-S-8879. form, shall not be permitted. Unless otherwis
45、e specified, threaded parts smaller than 0.164 inch diameter shall have threads in accordance with MIL-S-7742. When an allowance is required for application in elevated temperature, corrosive atmosphere, or other conditions which may cause thread seizure, this allowance shall be obtained by increasi
46、ng the diameter of the internal threads. Pipe threads shall not be used on components. Duplicate parts, differing only in thread 3.5.2 Electrical devices. Components incorporating electrical devices shall conform to MIL-S-4040, MIL-W-8160, MIL-E-8189, MIL-E-25366, MIE-STD- 446, and each electrical c
47、onnector used on a component shall incorporate a ground return terminal. 3.5.3 Hydraulic devices. Hydraulic actuation devices shall conform to the applicable requirements of Table I and paragraph 3.7 of EIE-H-25435. Hydraulic activation devices, which operate using the rocket engines pro- pellant as
48、 the working fluid, are excluded from the requirements of MIL-H- 25475, 3.6 Reliability. The contractor shall include in the model speeifica- tion the requirements for performing a detailed failure mode analysis. The failure mode analysis shall be used in designing the development and quali- ficatio
49、n tests and in reporting the test results. The model specification shall also include the manufacturing control and standards of MIL-STD-785. The contractor shall be responsible for establishing the reliability design reviews, reliability reporting procedures and reliability demonstration as specified in MIL-STD-785. 3.7 Interchangeability. All parts having the same manufacturers part numbers shall be directly and completely interchangeable with each other with respect to
