1、P MIL-Ry7957R ( AER) !MAY 1958 SU PERSEDES MIL-R- 7957A(AER) . 15MARCH 1956 MILITARY SPECIFIC ATION RADAR SET AN/APS-45A HSD PHXLLPA* This specification has been approved by the Bureau of Aeronautics, Department of the Navy. 1. SCOPE 1.1 of an airborne heightnder radar. targets at long ranges. This
2、equipment shall be used in conjunction with early warning search radar, such as the AN/APS-BOB, and combat information center display equipment, such as the AN/APA-56. As such, it shall be designed primarily for installation in WV-2 type aircraft especially adapted for airborne combat information ce
3、nter missions. Scope - The equipment covered by this specification shall perform the functions It shall provide accurate altitude information on airborne 1.2 Classification - The Radar Set AN/APS-45A shall be of one type and shall consist of the following: Units ANTENNA (Includes the following) Max.
4、 Type Allow. Applicable Designation Wt Lbs. Paragraph AS-809/APS-45A 346 3. 5. 1 Amplifier, Electronic Control AM- 552/APS-45 3. 5. 1. 4. 1 CONSOLE OA-295A/APS-45 834 3. 5.2 (Includes the folloUring) Control- Indic ator C- 908/APS- 45 3. 5.2. 5. 1 Power Supply PP-705/ApS-45 3. 5. 2. 5. 2 Transmitter
5、, Radar T-3 ll/APS-45 3. 5.2. 5. 3 Transformer, Variable Power -TF- 147A/APS-45 3. 5.2 5.4 Compressor, Air HD - 104/APS - 45 3. 5.2. 5. 5 Receiver, Radar R-743/APS-45A 3. 5. 2. 5. 6 Cabinet, Electrical Equipment CY-1301A/APS-45 3. 5. 2. 5. 7 1.; Accessories I 1. 3. 1 The equipment shall provide moun
6、ting for the following accessories. However, these accessories are not to be supplied with the equipment. Radio Control Box C-628/ARC-27 K. r furnished ICs Control Box . 1- /- -. DOCUENT OfdiW408- z.i-tL ?AG&; Provided by IHSNot for ResaleNo reproduction or networking permitted without license from
7、IHS-,-,- - I MIL-R-7957B(Aer - -_ 1.3.2 The following accessories shall be supplied with the equipment. Test Cables Test Cable Storage Compartment .: ia;? *:i S$y; Environmental, Aircraft Electronic Equipment MIL-E-5558 Enamel; Wrinkle-Finish, for Aircraft Use MIL- I- 618 1 MIL-P-7788 Interference L
8、imits, Tests and Design Require- ments, Aircraft Electrical and Electronic Equipment Plate, Plastic, Cockpit and Interior Controls Lighting MIL-E-7894 Electric Power, Aircraft, Characteristis of MIL-P- 1755 5 MIL- T- 18303 MIL-N-18307 Preparation for Delivery of Electronic Equipment (Except Rotating
9、 Electrical Equipment) and Associated Repair Parts Test Procedures, Preproduction and Inspection For Aircraft Electronic Equipment, Format for Nomenclature and Nameplates for Airborne Electronic and Associated Equipment Bureau of Aeronautics EI-231 - 2 Radar Set AN/APS-45, Installation Instructions
10、for 7 - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-R-7957B(Aer) I / 1 SAR-300 STANDARDS Engineering Change Proposals, Electronic Material Changes and Eleclxonic Mater ia1 Bulletins; Preparation of MIL-STD-129 Marking for Shipment and Storage
11、 DRAWINGS Bureau of Aeronautics 52AlA41-4 Indicator, Elapsed Time Air Force-Navy Aeronautical AND 10461 Connections- Input Power Air borne Electronic Equipment; 28 -Volt DC, 115 Volt Single-phase AC, and/or 115/200 Volt Three-phase AC 2. 2 Availability of Documents (1) Give both the title and number
12、 when requesting specifications, publications and drawings. Naval Mater ia1 or Bur eau of Aeronautics Repr esentabive. All requests should be made via the cognizant Inspector of (2) Copies of this specification and applicable specifications and publications may be obtained upon application to the Co
13、mmanding Officer, Naval Aviation Supply Depot, Philadelphia 11, Pennsylvania. Attention: Code ODPT. (3) Copies of applicable drawings may be obtained upon application to the Bureau of Aeronautics, Navy Department, Washington 25, D. C. Attention: Avionics Division. 2.3 Precedence - When the requireme
14、nts of the contract,*this specification, or applicable subsidiary specifications are in conflict, the following precedence shall apply. (1) Contract - The contract shall have precedence over any specification. (2) This _- Sp-ecification - This specification shall have precedence over all applicable
15、subsidiary specifications, sidiary specifications where applicable, shall be specifically approved in writing by the procuring agency. (3) Referenced Specifications - Any referenced specification shall have precedence over all applicable subsidiary specifications referenced therein. specifications s
16、hall apply to the extent specified. Any deviation from this specification, or from sub- All referenced 3. REQUIREMENTS 3. 1 Parts and Materials - In the selection of parts and materials, fulfillment of major design objectives shall be the prime consideration. In so doing, the following shall govern.
17、 (1) Parts and materials as approved by specification MIL-E-5400 shall be given first consider ation. (2) When the characteristics of standard MIL parts are such that their use will not fulfill the requirements because of size, weight, performance or other reasons, material and parts shall be used w
18、hich most nearly meet or exceed t!ie require- ments of the respective parts and material standard specifications. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-(3) When a non-standard part is used, the meeting of general material requirements such
19、as non-inflammability, fungus resistance, non-toxicity, etc. , and, the meeting of environmental conditions as requiredby specification MIL-E- 5400 and MIL-T-5422 shall be of prime consideration. (4) In the selection of parts, the above considerations shall apply if the assembly is to be built for d
20、etail part maintenance. In the event the entire assembly is built to be expended, the assembly shall be constructed and the quality of the individual parts shall be such that the unit as a whole will pass material, electrical and environmental tests. Any assembly built to be expended shall be approv
21、ed first by the procuring agency. 3.1. 1 Non-Standard Part Approval and Material Approval ; Approval for the use of non- standard parts and materials shall be obtained as outlined in specification MIL-E-5400 except as follows: I (1) Mechanical parts are expected to meet the material requirements of
22、specification MIL-E-5400, and shall be submitted as non-standard parts only when the material requirements are not met. (2) Non-standard parts, as defined in specification MIL-E-5400 of an electrical nature must be approved before the preproduction model of the equipment is delivered to the Bureau o
23、f Aeronautics. The request for approval must be forwarded by the contractor before the part is purchased or fabricated. In addition to or in lieu of the Non-Standard Part Data Sheet, the contractor is requested to submit itemized lists of the parts, their sources, and the con- tractors drawing or pu
24、rchase specification covering the parts. 3.1.2 Choice of Tube Types - Electron tubes used in the equipment shall be chosen in accordance with the following requirements and in the sequence noted: (1) MIL-E-4682 (2) The use of any tube not meeting the requirements of (1) above must be approved by the
25、 Bureau of Aeronautics; however, before consideration for approval, the contractor must submit the following information: (a) Quantitative data on the electrical advantages and mechanical adequacy of the proposed tube over the most nearly equivalent type on the acceptable listings . (b) Test data an
26、d 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 manufacturer has received Military or Navy qualification approval for the particular tube. of maintenance, and an improvement in fhe perf
27、ormance and reliability of the specific functionbeyond the requirements of this specification are objectives to be considered in the production of this equip- ment. Where it appears a substantial reduction in size and weight or improvement in simplicity of design, performance, ease of maintenance or
28、 reliability will result from the use of materials, parts and processes other than those specified in specification MIL-E-5400, it is desired their use be in- vestigated. When investigation shows advantages can be realized, a request for approval shall be submitted to the Bureau of Aeronautics for c
29、onsideration. Each request should be accompanied by complete supporting information. 3. 1. 3 Performance Objectives - Minimum size and weight, simplicity of operation, ease Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-.I MIL-R-7957B(Aer) 3. 2 Desi
30、gn and Construction 3.2. 1 General - This equipment sha.11 meet all the applicable design and construction requirements of specification MIL-E-5400, unless otherwise specified herein. 3.2. 1. 1 Connectors, Wired-In - Connector soldered joint and wires shall not be treated with moisture and fungus re
31、sistant varnish but shall be cleaned thoroughly with an approved solvent. 3. 2. 1.2 Finishes - Whenever the interference requirements of 3 2. 18 demand electrical grounds that are income with the finishing requirements of specification MIL-E-5400, the inter- ference requirements shall govern. 3. 2.
32、1. 3 Explosion Proofing - This equipment insofar as practicable shall be explosion- proof. 3.2.2 Service Conditions - The equipment shall operate satisfactorily under any of the environmental and mechanical service conditions or reasonable combinations of these conditions as specified in specificati
33、on MIL-E-5400 for Class I equipment with the following exceptions: 3.2.2 1 Altitude - Continuous operation at barometric pressures ranging from 30 inches of mercury down to 16.9 inches of mercury (approximating an altitude of 15,000 feet) for Console OA-295A/APS-45 and down to 5. 5 inches of mercury
34、 (approximating an altitude of 40,000 feet) for Antenna AS-809/APS-45A; the pressure remaining constant for long periods of time or varying at a rate as high as O. 5 inch of mercury per second. 3.2.2 2 Sand and Dust Particles - The equipment will not be required to withstand exposure to sand and dus
35、t particles. 3. 2. 2. 3 Vibration - The equipment, when normally mounted, shall operate satisfactorily when subjected to continuous vibration having a double amplitude of O. 04 inch at any frequency within the range of 10 to 55 cps, resulting in a maximum acceleration of +16-1/4 g, whichever is the
36、limit- ing value. ? The equipment will not be required to operate with isolators removed. 3. 2. 2. 4 Shock - The equipment, normally mounted, shall be capable of withstanding . shock not exceeding 5 g . 3. 2.3 Standard Conditions - The following conditions shall be used as a basis to establish norma
37、l performance requirements and for Jaboratory bench tests on the equipment: Temperature Altitude Normal ground Vibration None Humidity Input power voltage Total Weight - The total weight of the equipment, excluding cables, shall not Room ambient 25C (+15? or -5C) Room ambient up to 90% relative humi
38、dity 115 rt 1. O V AC and/or 27.5 rt O. 5 V DC 3. 2.4 exceed 1180 pounds. 3.2. 5 Operational Stability - The equipment shall operate with optimum performance for 20 hours, continuously or intermittently, without the necessity for readjustment of any controls which are inaccessible during flight. 3.
39、2. 6 Operating Life 3. 2. 6. 1 Reliable Operating Life - This equipment shall have a reliable operating life of at least 250 hours without removal for bench servicing. Parts requiring servicing or replace- ment at the end of this interval to renew this service life shall be specified by the manuf,ac
40、turer. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.2. 6. 2 Total Operating Life - The equipment shall have a minimum total operating life of 2000 hours with reasonable servicing and replacement of parts. Parts requiring replace- ment at the e
41、nd of this interval and the life of such parts shall be specified by the manufacturer. Elapsed Time Meter - Elapsed time meters in accordance with drawing 52AlA41-4 shall be included in the Electrical Equipment Cabinet !Y-1301A/APS-45 and shall indicate both standby and operating time. Interconnecti
42、ng Cabling - This equipment shall be capable of satisfactory operation using external wiring in accordance with the applicabe requirements of specification MIL-W-5088. The external wiring shall be unshielded, except that a minimum number of the individual wires may be shielded, when demonstrated as
43、necessary to meet interference control requirements and provided the aslernbly of the cable to its plugs may be easily accomplished, cables and connector-e requirements of specification MIL-E-6400. How- ever, cablee and that portion of the connectorB which is to be attached to the cables shall not b
44、e aupplied as part of the equipment, 3.2, 9 Control Panels - The lighting panels for operational controls shall be white lighted plastic in accmie applicable requirements of specification MIL-P-7788, 3.2, 10 Input Power Requirements - The equipinent shall meetall applicable require- ments of specifi
45、c%tionsNrT=7 and iiihal give specified performance from the following power source$ with characteristics a8 defined in sgscificatien MlIb-.E-7884 having limitei aB specified herein. Tho power required Bhall not exceed the q)ecified ainounta, 3.2. 6.3 3,2.7 3. 2. 8 Cables and Connectors - The equipme
46、nt shall be designed for the use of AC PO W (ThPee -P hase) (a) 115/200 Volt - Variable Frequency - Operating Voltage Limit8 Operating Frequency Limits Reduced Performance Voltage Limit8 Reduced Performance Frequency Limita Po wer (thr ee- phase) 110 to 120 volts 320 to 800 cps 102 to 110 and I20 to
47、 124 volt8 200 to 320 and 800 to 1000 cps 3300 V. A. (b) 115/200 Volt Constant Frequency Operating Voltage Limits Operating Frequency Limits Reduced Performance Voltage Limits Reduced Performance Frequency Limits Power (three-phase) 560 V. A. 110 to 120 volts 380 to 420 cps 102 to 110 and 120 to 124
48、 volts 250 to 380 cps (2) DC Power 28-Volts System Operating Voltage Limits Power 24 to 29 volts 1200 watts 3.2. 11 Input Power Connection - Input power connections shall be in accordance with drawing AND 10461. 3.2.12 Overload Protection - Neutral overload protection for the equipment shall be prov
49、ided. Protection for input power wiring shall be provided by the aircraft electrical system. All parts and circuits of the equipment which are likely to carry an overload due to any failures or poor adjustments shall have suitable protective devices or shall be proportioned to withstand such overload without permanent damage to the equipment. The use of fuses and other protective devices shall be held to a minimum. - - _- -. 6 p-c-.I_ -
