NAVY MIL-I-21400-1958 INTERVALOMETER ORDNANCE RELEASE TD-239 A《TD-239 A型军械时间间隔计》.pdf
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1、MIL-1-21400 (AER) 2 JUNE 1958 MILITARY SPE CIFICATION INTERVALOMETER, ORDNANCE, RELEASE TD- 239/A This specification has been approved by the Bureau of Aeronautics, Department of the Navy. 1. SCOPE 1. 1 The equipment covered by this specification shall generate/pulses, recurring at precise intervals
2、 of time, which are suitable for direct operation of release solenoids of bomb racks and other store suspension equipment. This equipment shall be such that the use of tables, or graphs, isunnecessary to provide the proper time interval associated with a desired ground spacing between dropped stores
3、 when the aircraft ground speed is manually inserted, The inter- valometer shall also control the number of stores expended. a. APPLICABLE DOCUMENTS 2.1 General - The foliowing documents of the issue in effect on the date of invitation for bids, form a part of this specification. SPEC1 FICATIONS Mil
4、itary MIL-C-172 Cases; Bases, Mounting; and Mounts, Vibration (For use with Electronic Equipment in Aircraft) Crystal Units, Quartz MIL- C- 3098 MIL-E-4682 Electron Tubes, Choice and Application of MIL-W-5088 Wiring, Aircraft, Installation of MIL-E-5400 Electronic Equipment, Aircraft, General Specif
5、ication for MIL-E-5422 MIL- I- 61 81 Environmental, Testing, Aircraft Electronic Equipment Interference Limits; Tests and Design Requirements, Aircraft Electrical and Electronic Equipment MIL-C-6781 MIL-P-7788 MIL- E- 7894 Control Panel; Aircraft Equipment, Rack or Console Mounted Plate, Plastic, Co
6、ckpit and Interior Controls Lighting Electric Power, Aircraft Characteristics of 1 f Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-21LI00 12 M 9799906 0301306 O W. MIL-I- 21400(Aer) MIL- P- 17555 Preparation for Delivery of Electronic Equipme
7、nt; Miscellaneous Electrical Equipment (Except Rotating Electrical Equipment) and Associated Repair Parts MIL- T-18303 Test Procedures, Preproduction and Inspection for Aircraft Electronic Equipment; Format for MIL-N-18307 Nomenclature and Nameplates for Airborne Electronic and Associated Equipment
8、Bureau of Aeronautics SAR-300 Engineering Change Proposais, Electronic Material Changes and Electronic Material Bulletins; Prepara- tion of STANDARDS Military MS-25245 Connections - Input Power Airborne Electronic Equip- ment 28-Volt DC, 115-Volt Single-phase AC, and/or 115/200-Volt Three-phase AC,
9、or Combinations DRAWINGS Bureau of Aeronautics 58A163D1 58A163DB TD- .239/A Intervalometer, Ordnance Release General Arrangement TD- 239/A Intervalometer, Ordnance Release In- stallation 58A16353 TD- 239/A Intervalometer, Ordnance Release Schematic Wiring 2. 2 Availability of Documents: (1) Give bot
10、h the title and number when requesting specifications, standards, drawings, and publications. All requests should be made via the cognizant Inspector of Naval Material or Bureau of Aeronautics Representative. (2) Copies of this specification and applicable documents maymbe obtained upon application
11、to the Commanding Officer, Naval Aviation Supply Depot, (AD), 700 Robbins Avenue, Philadelphia 11, Pennsylvania. (3) Copies of applicable drawings may be obtained upon application to the Bureau of Aeronautics, Navy Department, Washington 25, D. C., Attention: Avionics Division. 2 Provided by IHSNot
12、for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-1-21400 12 m 9797906 0301307 2 M - MIL-I -21400(Aer) 2.3 Precedence - When the requirements of the contract, this specification, or applicable subsidiary specifications are in conflict, the following precedence shail
13、apply: (1) Contract - The contract shall have precedence over any specification. (2) This Specification - This specification shall have precedence over all applicable subsidiary specifications. Any deviation from this specification, or from subsidiary specifications where applicable, shall be approv
14、ed in writing by the Bureau of Aeronautics. (3) Referenced Specifications - Any referenced specification shall have pre- cedence over all applicable subsidiary specifications referenced therein. All referenced specifications shail apply to the extent specified, 3. REQUIREMENTS 3.1 Parts and Material
15、s - in the selection of parts and materiais, fulfillment of major design objectives shall be the prime consideration. In so doing the following shall govern: (1) Parts and materials as approved by Specification MIL-E-5400 shall be given first consideration, (2) When the characteristics of standard M
16、a parts and materiais are such that their use will not fulfill the requirements because of size, weight, performance or other reasons, materials and parts shall be used which most nearly meet or exceed the requirements of the respective standard parts and material specifications. (3) When a nonstand
17、ard part is used, the meeting of general material require- ments such as noninfiammability, fungus resistance, nonintoxic, etc. , and the meeting of environmental conditions as required by Specifications MIL-E-5400 or MIL-E-5422 shall be of prime consideration. (4) in the selection of parts, the abo
18、ve considerations shall apply if the assembly is to be built for detail part maintenance. in the event the entire assembly is to be built to be expended, th9 assembly shall be constructed and the quality of the individual parts shall be such that the unit as a whole will pass material, electrical an
19、d environmental tests. Any assembly built to be expended shail be approved first by the Bureau of Aeronautics. 3.1.1 Nonstandard Parts and Material Approval - Approval for the use of nonstandard parts and materials shall be obtained as outlined in Specification MIL-E-5400 except as follows: (1) Mech
20、anical parts shall be submitted as nonstandard parts only when the material requirements of Specification MIL-E-5400 are not met. (2) Nonstandard parts of an electrical nature as defined in Specification MIL-E-5400, must be approved before the preproduction model of the equipment is submitted for te
21、sts. The request for approval shall be forwarded to the Bureau of Aeronautics before the part is purchased or fabricated. in addition to or lieu of the Nonstandard Part Data Sheet, the contractor shall submit an itemized list of the parts, their sources, and the contractors drawing or purchase speci
22、fication covering the parts, 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL- I - 21400(Aer) 3.1. 2 Tube Types - The choice and application of electron tubes used in the equip- ment shall be in accordance with the following requirements and in
23、the sequence noted: (1) MIL-E-4682 (2) The use of any tube not meeting the requirements of (1) above shall be approved by the Bureau of Aeronautics; however, before consider- ation for approval, the contractor shall submit the following information: (a) Quantitative data on the electrical advantages
24、 and mechanical adequacy of the proposed tube over the most nearly equivalent type on the acceptable listings. (b) Test data and performance limits of the tube which must be maintained to insure satisfactory and reliable performance in the equipment. (c) Information as to whether the tube manufactur
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