1、e !- a MIL-F-5744 33 m 7777706 0365733 O m ar-/9 MIL-F-8 5 74 4 ( AS) 4 MARCH i987 MILITARY SPECIFICATION FUZE, PROXIMITY, DISPENSER FMU-140/B This specification is approved for use within the Naval Air Systems Command, Department of the Navy, and is available for use by all Departments and Agencies
2、 of the Department of Defense. 1. SCOPE. 1.1 Scope. This specification establishes the requirements for manufac- ture and acceptance of the FMU-140/B Dispenser Proximity Fuze, referred to herein as the “fuze“. 2. APPLICABLE DOCUMENTS. 2.1 Government document s. 2.1.1 Standards. The following standar
3、ds form a part of this specifica- tion to the extent specified herein. Unless otherwise specified, the 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 !he solicitation. Beneficia
4、l comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commanding Officer, Naval Air Engineering Center, Systems Engineering and Standardization Department (SESD), Code 93, Lakehurst, NJ 08733, by using the sel
5、f-addresed standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC NIA DlSTRIBUTlON STATEMENT A: Approved for public release distribution is unlimited . /- . THIS DOCUMENT CONTAINS L37 PAGES. Licensed by Information Handling ServicesSTAND
6、ARDS FEDERAL FED-STD-102 MILITARY MIL-STD-105 MIL-STD-129 MIL-ST533 1 MIL-S TD-4 54 MIL-STD-810 MIL-STD-1167 MIL-STD-1322 MIL-STD-1695 Preservation, Packaging, and Packing Levels. Sampling and Tables for Inspection by Attributes. Marking or Shipment and Storage. Fuze and Fuze Components, Environment
7、al and Performance Tests for. Standard General Requirements for Electronic Equipment. Environmental Test Methods and Engi- neering Guidelines. Ammunition Data Card. Unit loads of Ammunition and Explosives for Domestic and Overseas Shipment. Environments, Working, Minimum Standards for. Ml L- S TD-4
8、5 6 6 2 Calibration Systems Requirements. 2.1.2 Drawings and publications. The following drawings and publica- tions form a part of this specification to the extent specified herein. Unless otherwise specified, the issues shall be those in effect on the date of the solicitation. DRAWINGS Naval Air S
9、ystems Command (Code Ident 30003) 1472AS200 Fuze, Proximity, Dispenser FMU- 1 40/ B Licensed by Information Handling Servicesa MIL-F-5744 33 7999906 0365935 MIL-F-85744(AS) 1472AS400 PUBLICATIONS Naval Air Systems Command (Code Ident 30003) WS-6536 Packaging and Marking for Two FMlJ-l40/B Fuze Assem
10、blies. Procedures and Requirements for Preparation and Soldering of Electrical Connections. Code of Federal Regulations (CFR) 49 CFR 171-178 Transportation. (Copies of standards, drawings, and publications, required by contractors in connection with specific acquisition functions should be obtained
11、from the contracting activity or as directed by the contracting activity.) 2.2 Order of- precedence. In the event of a conflict between the text of this specification and the references cited herein, the text of this speci- fication shall take precedence. Nothing in this specification, however, shal
12、l supersede applicable laws and regulations unless a specific exemption has been obtained . 3. REQUIREMENTS. 3.1 Item description. mission, radio frequency arming, and operating in The fuze shall be a self-powered, active single- (RF), radar altimeter device capable of safing, a high electronic coun
13、termeasures (ECM) environ- ment and capable of providing a proximity or time function mode for dispenser weapons. 3.2 Characteristics. 3 . 2.1 Performance. 3.2.1.1 Mechanical. 3.2.1.1.1 Fuze initiation, The axial pull force of 125 510 pounds wire that is connected to the fuze fuze shall initiate (se
14、e 6.3.1) when an is applied to the fuze primary arming battery firing device. 3.2.1.1.2 Time function mode select. The time function mode shall be selected when an axial pull force of 125 510 pounds is applied to the option arming wire in conjunction with fuze initiation (see 3.2.1.1.1). 3 Licensed
15、by Information Handling ServicesMIL-F-85744 13 4777906 03b571b b I 3.2.1.1.3 Air velocity sensor. The fuze shail have an air velocity sen- sor which prevents arming at velocities less than 160 knots calibrated airspeed (KCAS) and allows arming at velocities greater than 225 KCAS. 3.2.1.1.4 Seal inte
16、grity. When the fuze is pressurized and immersed in alcohol, there shall be no evidence of leakage as indicated by a steady stream of gas bubbles for an observation period of 30 seconds minimum. A steady stream of gas bubbles is defined as the lornation of a bubble at the fuze prior to the last bubb
17、le reaching the surface of the alcohol. 3.2.1.1.5 Explosive output. The fuze shall provide an explosive output which will create a dent of not less than 0.032 inch depth in a dent block (see 6.3.7). 3.2.1.1.6 Operating life. The fuze operating life shall be not less than 60 seconds after fuze initia
18、tion (see 3.2.1.1.1). 3.2.1.2 Electrical. 3.2.1.2.1 Proximity function mode. The proximity function mode shall be selected by pulling only the fuze arming wire. 3.2.1.2.1.1 Arm time. The arm times from fuze initiation to the arm pulse shall be in accordance with Table I. 3.2.1.2.1.2 Height of functi
19、on (HOF). 3.2.1.2.1.2.1 Primary HOF. The fuze shall have 10 manually-selectable HOF settings as specified in Table II. 3.2.1.2.1.2.2 Alternate HOF. The fuze shall provide the output of 3.2.1.1.5 between the primary HOF and 250 feet. 3.2.1.2.1.3 Loop loss sensitivity. When operated in an environment
20、that simulates a closing velocity of 1,200 +loo, -0 feet per second (fps), the loop loss (see 6.3.2) that causes the output of 3.2.1.1.5 to occur shall not be less than 122 decibels (dB) except after exposure to the environmen- tal conditions of 3.2.2, the minimum loop loss shall be 120 dB. 3.2.1.2.
21、1.4 Operating frequency (fl, f2). The operating frequencies are defined in Appendix I and are provided under separate cover. 3.2.1.2.1.5 ECM immunity. 3.2.1.2.1.5-1 ECM high level immunity, The application of a swept con- tinuous wave (CW) jamming signal from fi - 10 megahertz (MHz) to fi + 10 MHz a
22、t a rate not to exceed 40 MHz/second and of a power level specified in Appendix I shall cause the fuze transmitter to toggle from fl to f2. 4 Licensed by Information Handling ServicesMIL-F-857q4 13 W 0b 03b5717 8 MIL-F-85744(AS) TABLE I. Arm time. Arm time setting (seconds) 1.2 4.0 6.0 8.0 10.0 II A
23、rm pulse time (seconds) -. 1.2 +0.6, -0.1 4.0 M.5, -0.4 6.0 k0.6 8.0 k0.8 - 10.0 -. -+lo0 TABLE II. HOF settingsand accuracies. HOF switch setting 3 5 7 9 12 15 18 22 26 30 Selected HOF (feet) 300 500 700 900 1,200 1,500 1,800 2,200 2,600 3,000 Accuracy (feet) 550 -+50 k50 +75 -225 +75 -225 +75 -225
24、 +IO0 -250 +lo0 -250 +lo0 -250 +lo0 -250 5 Licensed by Information Handling ServicesMIL-F-85744 13 9979706 0365738 T I 3.2.1.2,1.5,2 ECM/low level immunity. The application of a swept CW jamming signal from fl - 10 MHz to fl + 10 MHz at a rate not to exceed 10 MHz/second and of a power level specifi
25、ed in Appendix I shall not cause the fuze transmitter to toggle from fl to f2. 3.2.1.2.1.5.3 ECM/spot jammer. The application of a fixed CW jammer signal with a frequency and power level as specified in Appendix I shall cause the fuze transmitter to toggle from fl to fe. 3.2.1.2.2 Time function mode
26、. When both the primary and option arming wires are pulled, the fuze shall arm and provide the explosive output spe- cified in 3.2.1.1.5 within 1.25 +0.6, -0.1 seconds after initiation (see 3.2.1.1.1). 3.2.2 Environmental conditions. 3.2.2.1 Temperature/humidity/altitude. The fuze shall be safe (see
27、 6.3.3) and operable (see 6.3.4) after exposure to four cycles of an environment with temperature extremes of- -65 to 149 degrees Fahrenheit (OF), relative humidity to 95 percent and altitudes to 50,000 ft. 3.2.2.2 Salt fog, After exposure to a salt fog environment of 5 percent salt concentration at
28、 95OF, the fuze shall be operable (see 6.3.4) after 48 hours and safe (see 6.3.3) after 96 hours. 3.2.2.3 Extreme temperature storage. None of the safety features of the fuze shall be compromised by exposure, and no components or materials shall in any way be deformed, changed or otherwise altered i
29、n such a manner as to degrade performance. The fuze shall be safe (see 6.3.3) and operable (see 6.3.4) after being exposed to -65OF for 28 days followed by exposure to 160F for 28 days. 3.2.2.4 Transportation vibration. The fuze shall be safe (see 6.3.3) and operable (see 6.3.4) after vibration test
30、ing in all 3 axes at ambient temperature, -65OF, and 160F, at the following levels. Frequency (Hz) Test leyel 5-1 1 0.4 in displacement 11-37 2.5 gravity units (g) acceleration, peak 37-52 0.036 in. displacement 52-500 5.0 g acceleration, peak 6 Licensed by Information Handling ServicesMIL-F-85744 1
31、3 7977706 0365919 I m MIL-F-85744(AS) 3.2.2.5 Random vibration. The fuze shall withstand vibration encoun- tered under captive-flight and free-flight conditions as specified below. None of the safety features of the fuze shall be compromised by exposure, and the fuze shall be safe (see 6.3.3) and op
32、erable (see 6.3,4) after expo- sure to the environments (a) and (b) below. a. Captive flight, sustained carriage (no buffeting). During cap- tive flight, sustained carriage, the fuze shall withstand vibration at temperatures from -40 to 160F for 60 minutes along each of the three orthogonal axes (fu
33、ze longitudinal, vertical, and aircraft/store level-normal flight attitude), and vibration spectrum (acceleration power spectral density) as follows: (1) Beginning at 0.01 gravity units squared (g2)/hertz (Hz) at 20 Hz; (2) Ramp-up at +3 dB/octave, 20 to 100 Hz. (3) -0.05 g2 Hz from 100 to 1,000 Hz;
34、 and (4) Roll-off at -3 dB/octave from 1,000 to 2,000 Hz. b. Captive flight, attack maneuvering (buffeting). During cap- tive flight, attack maneuvering, the fuze shall withstand vibration at temperatures from -40 to 160F for a total of 150 seconds along each of the three orthogonal axes (fuze longi
35、tudinal, aircraft/store vertical, and aircraftlstore level-normal flight attitude), and vibration spectrum (acceleration power spectral density) as follows: (1) (2) Beginning at 0.5 g2/Hz at 10 Hz; Ending at O. 11 g2/Hz at 100 Hz; and C. Free flight. During free flight, the fuze shall withstand vibr
36、ation at temperatures from -40 to 160F for 6 minutes along each of the three orthogonal axes (fuze longitudinal, aircraft/store vertical, and aircraft/store level - normal flight attitude), and vibration spectrum (acceleration power spectral density) as follows: 20 to 100 Hz 100 to 1000 Hz 1000 to 2
37、000 Hz +3 dbloctave to 0.05 g2/Hz 0.05 g2/Hz -3 db/octave from 0.05 g2/Hz 3.2.2.6 Temperature shock. The fuze shall withstand exposure to temper- atures from -65 to +160F. None of the safety features of the fuze shall be compromised by exposure, and the fuze shall remain safe and operable. 7 License
38、d by Information Handling ServicesMIL-F-85744 13 9 777770b 0365720 8 9 MIL-F-85744(AS) 3.2.2.7 High temperature. The fuze shall withstand exposure to tem- peratures up to 160F followed by a sharp temperature impulse to 220F for 10 minutes to simulate aerodynamic heating. the fuze shall be compromise
39、d by exposure, and the fuze shall be safe and operable during exposure to each temperature. None of the safety features of 3.2.2.8 Low temperature. The fuze shall withstand exposure to tem- peratures down to -65F. None of the safety features of the fuze shall be compromised by exposure, and the fuze
40、 shall be safe and operable after exposure. 3.2.2.9 Dust. The fuze shall withstand the dust environment for a mini- - mum total time of 28 hours. The dust environment consists of temperature extremes from ambient to 145“F, 1750 feet per minute air velocity and 0.3 grams dust per cubic feet air. None
41、 of the safety features of the fuze shall be compromised by exposure, and the fuze shall be safe (see 6.3.3) and operable (see 6.3.4) after exposure to the environment. 3.2.2.10 Fungus. The fuze shall not support fungus growth when exposed to United States Department of Agriculture (USDA) Fungus Num
42、bers QM 380, 386, 432, 459, and 474. None of the safety features of the fuze shall be compromised by exposure, and the fuze shall be safe (see 6.3.3) and operable (see 6.3.4) after exposure to the fungus environment for 28 days. 3.2.2.11 Catapult and arrested landing. The fuze shall withstand the sh
43、ock from not less than three catapulted aircraft takeoffs and three aircraft arrested landings. With the nose of the fuze oriented as it would be in an ejection-rack-mounted weapon in the direction of aircraft travel, the maximum expected shocks, including a dynamic load factor of 2.0, shall be as f
44、ollows: a. b. None of the Catapult (takeoff): 4 g forward 18 g aft 4 g UP 10 g down Arrested landing: 18 g forward 4 g aft 8 g UP 18 g down safety features of the fuze shali be compromised by exposure, and the fuze shall be safe (see 6.3.3) and operable (see 6.3.4) after expo- sure to three shocks i
45、n each direction. 8 Licensed by Information Handling Servicesi _- MIL-F-5744 13 W 9779906 0365921 T 3.2.2.12 Envirpnmental safety conditions. 3.2.2.12.1 Static detonator safety. There shall be no evidence of deto- nation, burning, charring, scorching, or melting of the explosive lead should the fuze
46、 detonator inadvertently function while the fuze is in a safe position (see 6.3.5). There shall be no evidence of rupturing or chattering of the fuze housing or radome, or ejection of particles during or after exposure to the environment of MIL-STD-331, Test 115. 3.2.2.12.2 Jolt. The fuze explosive
47、train shall withstand the jolt from - a 4-inch free drop in any orientation onto a padded anvil. No explosive elements shall initiate and the safety features,of the fuze shall not be compromised by repeated jolting. transport, and handle, but need not be operable after exposure. The fuze shall be sa
48、fe to store, 3.2.2.12.3 1.5-meter drop. The fuze shall withstand one 1.5-meter drop in any orientation onto a steel plate. None of the safety features of the fuze shall be compromised by exposure, and the fuze shall be safe to handle and dispose of but need not be operable after exposure. 3.2.2.12.4
49、 12-meter drop. The fuze need not be operable, but shall be safe to handle and dispose of after being dropped from a height of 12 meters onto a steel plate. The fuze lead charge shall not be burned or initiated after exposure. 3.2.2.13 Flight test. The fuze shall meet the perforaance requirements specified in the flight test plan during exposure to actual flight environ- ments of 4.6.4.13 (see 4.2). 3.2.2.14 Environmental stress screening (ESS). The fuze shall be safe - and operable (see 6.3.3 and 6.3.4) after being subjected to the following environmental conditio
