1、1 MIL-M-81757B 23 797970b Oq507b b I I INCH POUNDI 1 October 1990 SUPERSEDING 9 October 1975 MIL-M-81957B(AS) MIL-M-B1957A(AS) MILITARY SPECIFICATION MOBILE TEST FACILITY, GAS TURBINE ENGINE TEST SYSTEMS GENERAL SPECIFICATION FOR This specification is approved for use by the Naval Air Systems Comman
2、d, Department of the Navy, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification establishes engineering and design criteria for the development and construction of NAVAIR Mobile Facility (MF) Units. These MFs or units are class
3、 1 nonexpandable tactical shelters used for testing as defined in MIL-STD-907. The nominal exterior dimensions are; 8-feet wide, 8-feet high and 20 feet long in the shipping mode configuration. The Mobile Testing Facility shall be referred to hereafter as the MF or uni t. 1.2 International Interest.
4、 Certain provisions of this unit are the subject of an international standardization agreement, IS0 149611. 2. APPLICABLE DOCUMENTS Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Standardizatio
5、n Department. (Code 53), Lakehurst, NJ 08733-5100, by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. Naval Air Engineering Center, Systems Engineering and AMSC N/A FSC 2330 DISTRIBUTION STATEMENT A. Approved for public relea
6、se; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-e * 2.1 Government documents, The fol lowing specifications and standards form a part of this specification to the extent specified herein. Unless otherwise specified, the
7、 issues of these documents shall be those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2,). SP ECI F ICATIONS Federal FF-P-101 TT-E-52 9 ZZ-R-7 6 5 MI LI TARY MI L-P-514 MIL-F-5591 MI L-A-9067
8、 MI L-W-6858 MI L-F-14072 MI L-N-18307 MI L-P-23377 MI L-M-437 19 MI L-C-83286 STANDARDS Federal FED-STD-595 Mi 1 i tary MI L-STD-129 MI L-STD-130 MI L-STD-401 MI L-STD-248 MI L-STD-808 MI L-STD-81 O MI L-STD-889 MI L-STD-907 Padlock Enamel, Alkyd, Semi-gloss Rubber, Si 1 i cone Plate, Identificatio
9、n, Instruction and Marking, blank Fasteners, Panel, Nonstructural Adhesive Bonding, Process and Inspection, Requirements for Welding, Resistance, Spot and Seam Fini shed for Ground Electronic Equipment Nome nc 1 ature and Iden t i fi cat ion for Aeronaut i cal Systems including Joint Electronics typ
10、e Designated Systems and Associated Support Equi pment. Primer Coating, Epoxy-Polyamide, Chemical and Solvent Resi stant Marking Materials and Markers Adhesive, Elastomeric, Pigmented, General Specification For Coating, Urethane, Aliphatic, IS0 Cyanate, for Aerospace Applications Col or Marking for
11、Shipment and Storage Identification, Marking of U.S. Military Property Sandwich Constructions and Core Materials; General Test Methods We 1 di ng and Brazi ng Procedure and Performance Qual ification and Processes for Corrosion Prevention Finish, Materials, and Processes for Corrosion Prevention and
12、 Control in Support Equipment Environmental Test Methods and Engineering Guidelines Dissimilar Metals Engineering And Design Cri teria For She1 ters, Expandable And Non-Expandabl e 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-R NIL-N-8L957B 23 H
13、 9999906 0450788 T I MI L-M-8 1 9 57 B( AS) (Unless otherwise indicated, copies of federal and military specifications and standards, are available from the Standardization Documents Order Desk, Bldg. 4D, 700 Robbins Avenue, Philadelphia,Pa. 19111-5094 2.2. Non-Government publications. The following
14、 document(s form a part of this document to the extent specified. herein. Unless otherwise specified, the issues of the documents which are DoD adopted are those listed in the issue of the DODISS cited in the solicitation. documents not listed in the DODISS are the issues ofthe documents cited in th
15、e solicitation (see 6.2). Unless otherwise specified, the issues of AMERICAN SOCIETY for TESTING and MATERIALS (ASTM) ASTM C423-89 Standard Test for Sound Absorption of Acoustical Materials in Reverberation Rooms (Applications for copies should be addressed to the American Society for Testing and Ma
16、terials, 1916 Race Street, Philadelphia, PA 19103.) American National Standards Insti tute ANSI MH5.1.1 Closed Van Containers, Requirements For (Applications for copies should be addressed to the American National Standard Insti tute, 1430 Broadway, New York, N.Y. 10018) International Organization f
17、or Standardization ( IS0 IS0 1496/1 Freight Containers-Specification and Testing (Application for copies shauld be addressed to the International Organization for Standardization (ISO), 1 rue de Varembe, 1211 Geneva 20, Switzerland (Non-Government standards and other pub1 ications are normally avail
18、able from the organizations that prepare or distribute the documents. be available in or through 1 i braries or other informational servi ces.) These documents al so may * 2.3 Order of precedence. document and the references cited herei n (except the re1 ated associated detai 1 specifications, speci
19、fication sheet, or MS standards), the text of this document takes precedence Nothi ng in thi s document, however, supe.rcedes appl i cab1 e 1 aws and regulations unless a specific exemption has been obtained. In the event of a conflict between the text of this 3. REQUIREMENTS * 3.1 First article. Wh
20、en specified (see 6.31, a sample shall be subjected to first article inspection (see 6.3.) in accordance with 4.4. Unless otherwise specified, the manufacturer shall submit two units for first article testing. The units submitted shall be representative of the construction, workmanship, components a
21、nd materials to be used during production. Fabrication of additional units prior to approval of the fir.st article samples will be at the contractors risk, and such additional items are subject to rejection in the event they fail to meet the requirements of this specification. After first article ap
22、proval, one of 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-I757B 23 W 777770b Oq50789 I II t e the units submitted shall be delivered as directed. The second unit shall be retained at the contractors plant to be used as a manufacturing st
23、andard and will be presented for inspection as the last unit for delivery under the contract. 3.2 Specification sheets - The mobile facility requirements shall be as specified herein and in accordance with applicable specification sheets. In the event of conflict between the requirements of the basi
24、c specification and the specification sheet, the requirements of the specification sheet shall prevail. 3.3 Size - The unit size shall be nonimally 8-feet wide, 8-feet high, and 20-feet long and shall conform specifically to dimensions and tolerances as establish in the American National Standards I
25、nsti tute (ANSI) ANSI MH5.1.1 and the size and tolerance specified in the applicable specification sheet. 3.4 Weight ratings - The weight rating on which the structural design and testing of the unit is based shall be in accordance with ANSI MH5.1.1 and the appl i cable speci fi cation sheet. 3.5 Co
26、nstruction - The unit described in this specification and the applicable specification sheet shall be designed, constructed and tested in accordance with this specification, and ANSI MH 5.1.1 except that all design requirements for handling and securing for commercial air mode are waived. 3,5.1 Mate
27、rials and components - Materials and components shall conform to the applicable specifications, and be as specified herein. Materials which are not covered by specifications or standards shall be of the best commercial quality, the lightest practical weight, and entirely sui table for the purpose in
28、tended. 3.5.1.1 components due to fungus growth. All materials including hardware and fastening devices shall be either of corrosion resistant material or processed to be corrosion resi stant. Corrosion resistance - There shall be no degradation of shelter 3.5.1.2 Fungus resistance - The unit and al
29、l materials therein shall be resistant to fungus. Materials shall be selected to maximize inhibition of fungus growth. 3.5.1.3 Dissimilar materials - The use of dissimilar metals used in e contact with each other shall be in accordance with MIL-STD-889. Galvanic corrosion shall be avoided by using a
30、n insulated material to minimize the corrosive effect. 3.5.1.4 Protective treatment - Materials that are subject to deteriortion, when exposed to environmental conditions likely to occur during service usage, shall be protected against deterioration in a manner that will comply with the performance
31、requirements of this specification, 3.5.2 Panels.- Each wall, roof and floor of the unit shall be constructed of two essentially parallel aluminum skins enclosing an insulating core material and required structural members. The roof floor panel skins shall be made of one piece seamless construction.
32、 The side and end panels may be seamed only above and in line with the sides of the door cutout, The insulating core material shall be incombustible or self-extinguishing polyurethane foam slab and shall be bonded to both the inner and outer skins without voids or delaminated areas. The bonding 4 Pr
33、ovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-M-1757B 23 W 7777706 0450770 I MI L-M-8 1 957B(AS 1 material shall be flexible and allow for slight movement. Nothing shall protrude from the inside surfaces of the unit except items such as door latc
34、hes, handles and International Standards Organization (IS01 corner fittings. Al 1 interior surfaces of each panel shall be flat within 1/8 inch and intersecting panels mutually perpendicular to within 1/16 inch when measured in accordance with this specification. 3.5.2.1 Mounting members.- The desig
35、n of the walls, roof and floor mounting members shall permit direct installation of a closed end, watertight threaded insert which accommodates a 5/16-18 UNC bolt from the inside of the unit. All lateral mounting members shall be located on 22-inch centers. longi tudi na1 members, if used, shall ext
36、end the full length of the unit and shall be located to meet the strength requirements of this specification. 3.5.2.2 Thermal barrier - A thermal barrier shall be bonded between all mounting members and the inside skin. Rubber shall not be used for this purpose. 3.5.2.3 Panel core material bond - Ad
37、hesive bonding of the panel core material shall be in accordance with MIL-A-9067. 3.5.2.4 Adhesive - The adhesive used to make structural connections in the unit shall meet the test requirements of this specification. 3.5.2.5 Vapor seal - The inner and outer skins and all joints shall provide a All
38、joints and edges shall vapor barrier against the entrance of moisture to the core material and to the interior of the unit. cross-sectional openings of the walls, floor and roof. be assembled and treated in a manner to prevent collection and retention of moisture. All rivets, screws and fasteners sh
39、all be dipped in sealer prior to installation. The sealing compound shall meet the test requirements of this specification. The vapor seal shall exhibit sufficient flexibility to allow movement of the outer panels due to vibrations or temperature variations. The vapor barrier shall be maintained int
40、act at all 3.5.3 Floor - The floor of the unit shall be capable of withstanding a uniformly distributed load of not less than the design gross weight of the shelter. 3.5.4 Roof - The roof of the unit shall be capable of withstanding a uniformly distributed load of not less than 660 pounds on an area
41、 of 24 inches x 12 inches. 3.5.5 Impact resistance. - All MF panels shall be designed to withstand the impact test requirements of this specification. 3.5.6 Hardware - Hardware for the unit consisting of such items as door handles and cover fasteners shall be operable by personnel wearing arctic-typ
42、e gloves. The large mittened hand is defined as extending the human hand size i/2 inch in all directions. Screws and fasteners which retain access devices (doors, covers, plates, panels and butting kits, etc.) shall be captivated and shall have slotted or cross recessed heads, Screws shall be capabl
43、e of complete, individual loosening prior to movement of the access device. Quarter-turn fasteners may be used only to retain non-structural access devices, where quick access is necessary. The fasteners shall conform to MIL-F-5591. dimensions established in ANSI MH5.1.1. No hardware shall protrude
44、beyond the 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.5.7 Corner fittings - Top and bottom corner fittings conforming to the e dimensional and structual requirements of ANSI MH5,l. 1 shall be provided as an integral feature of each corner Of
45、 the structural member. 3.5.8 Forklift capability - The unit shall be designed to permit movement by a forklift truck. Such movement shall be accomplished from either side of the unit without jeopardizing its structural integrity. Four heavy-duty, reinforced forklift pockets, dimensionedand located
46、in accordance with ANSI MH5.1.1 shall be provided within the floor area of the unit, The bottom side of each pocket may be left open; a minimum of five retainers, of sufficient strength, shall be provided across the bottom to prevent the unit from tipping off the forklift tines. 3.5.9 Doors - All do
47、ors specified in the applicable specification sheet shall be readily removable when in the open position. The design of the door shall be such as to preclude removal when the door is in a closed and latched position. All doors shall be flush mounted wherever possible, but in no case may any part or
48、structural member extend beyond the dimensions establ i shed by ANSI MH5,l. 1. The doors shall be fabricated of the same materials as the wall panels and shall have complete gasketing conforming to the requirements of this specification (see 3.7.2 and 3.7.3). Gasket materials shall conform to ZZ-R-7
49、65 Class 3b, Grade 50. Each door shall be equipped with drip caps installed directly above the door. The door latching device shall be not less than a three (3) point roller latch. Assembly operating at the top, center and bottom of the door. The roller latch mechanism shall be actuated simultaneously by handles provided on the exterior and interior of the door. The door shall be capable of being locked from inside or outside of the unit. A heavy duty padlock conforming to F
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