1、MIL-T-8 11 87 (AS) i July 1966 MILITARY SPECIFICATION TRANSMITTER, RATE OF FUEL FLOW, SYNCHRO TYPE, MS90361 This specification has been approved by the Naval Air Systems Command, Department of the Navy. 1. SCOPE 1.1 Scope - This specification covers design and all perform-, i ance requirements for s
2、ynchro type rate of fuel flow transmitters up to 5000 PPH maximum. 1.2 Classification - The transmitters shall be classified as shown on MS90361. 2. APPLICABLE DOCUMENTS 2.1 The following documents of the issue in effect on the date of invitation for bids, form a part of this specification to the ex
3、tent specified herein. SPECIFICATIONS Military - - MIL-P-116 Preservation, Methods of MIL-E-5272 Environmental Testing, Aeronautical and Associated Equipment, General Specification for MIL-T- 5350 Transmitters, Synchro Operated Aircraft, General Specification for MIL- 5-5624 Jet Fuel, Grades JP-4 an
4、d JP-5 MIL-S- 687 2 Soldering Process, General Specification for MIL-1-8 1186 Indicator, Rate of Fuel Flow, Synchro Type Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I A MIL-STB-130 MIL-STD-781 Reliability Tests Exponential Distribution Identifica
5、tion Marking of U. S. Military Property MIL-STD-794 Parts and Equipment Procedures for Packaging and Packing of M890361 Transmitter, Rate of Fuel Flow, Synchro Type 2.2 Availability of documents - When requesting any of the appli- cable documents, refer to both title and number. Copies of this speci
6、fication and applicable documents may be obtained upon application to the Commanding Officer, Naval Supply Depot, Code 1051, 5801 Tabor Avenue, Philadelphia, Pennsylvania 19120. 3.1 Qualification - The transmitters furnished under this specification shall be a product, samples of which have been tes
7、ted and have passed the listing on the applicable qualified products list. .I Qualification Tests specified herein, and has been listed on or approved for -: 3.2 General - The requirements of MIL-T-5350 are applicable as requirements of this specification. Additional requirements shall be as specifi
8、ed herein. 3.3 Design and construction - The transmitter shall produce a synchro output signal representative of the rate of fuel flow through a range as classified on MS90361. The synchro signal shall operate one or two indicators designed in accordance with MIL-1-81186. The transmitter shall preve
9、nt small variations of flow rate from causing objectionable oscillations in indicator readings, 3.3.1 to MS90361. 3.3.2 calibrated for rate of flow in pounds per hour (PPK) using fuel which complies with MIL-J-5624. A commercial fuel of higher flash point may be used for testing purposes. Case - The
10、 outline dimensions of the transmitter shall CO be used to drive the fluid at these flow rates. The transmitter shall be energized and wired to an indicator in accordance with MIL-1-81186. 4.4.3.3.2 Performance characteristics to be measured - The Scale error at room temperature test, described unde
11、r Inspection methods, shall be conducted at least once each week. 4.4.3.3.3 Failure criteria - Whenever performance characteristics fall below the acceptance requirements (4.4.3.3.2), at least one failure has occurred. If subsequent analysis reveals that several parts have deteriorated, each should
12、be counted a failure, unless one part caused the other parts to fail. 4,4,3.3.4 Preventive maintenance - No preventive maintenance may be accomplished on samples while they are on test. 4.4.3.3.5 Disposition of samples upon completion of tests - Any sample tested, other than those tested under. the
13、Reliability Qualification Phase, may be delivered on contract provided it meets all the following requirements: (a) It is representative of production units currently being accepted. (b) It is in “good as new“ condition or has been refurbished. (See 6.1) (c) It is otherwise satisfactory. 8 Provided
14、by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-i and decreasing rates of flow. This test shall be conducted with the transmitter connected to the master indicator and the power supply. In no event shall either the upscale or downscale readings exceed the sca
15、le error tolerance specified in Table I. TABLE I Tolerances %percent of actual flow Percent of Max Fuel Flow 10 - 20 30 40 50 60 70 80 90 100 Aromatic Fuel I Room Temperature (25“ C) High Temperature +38“ C I Low Temperature -38“ C 20. o 6. O 3. o 2. o 1; 6 1.6 1-8 2. o 2. o 2. o 30 12 5 .3 3 3 3 3
16、3 3 30 12 5 5 5 5 5 5 6 6 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-by the manufacturer for correct installation, to any other position shall not exceed 1 percent of full scale reading. 4.6.6 5350 shall apply. Dielectric strength - The dielec
17、tric strength test of MIL-T- 4.6.7 High temperature - The transmitter shall be subjected to a temperature of +38 C (+loo“ F) fora period of two hours and while still at this temperature shall be tested for scale error. The fuel shall iso be at this specified temperature. The scale error shall not ex
18、ceed the tolerances specified in Table I. The transmitter shall then be subjected to, and meet, the require- ments of the Scale error at room temperature test. 4.6.8 Low, temperature .- The transmitter shall be subjected to a temperature of -38“ C(-36.4“ F) for a period of two hours and while at thi
19、s temperature the transmitter shall be tested for scale error with fuel at -38 C (-36.4 F). The scale error shall not exceed the tolerances specified in Table I. The transmitter shall then be subjected to, and meet, the requirements of the Scale error at room temperature test. 4.6.9 Voltage and freq
20、uency variation - The transmitter shall be operated at a fuel flow rate of and the transmiaer shall have been subjected to, and met, ail the re- quirements of a new transmitter. 6.2 Qualification - With respect to products requiring qualification, 13 Provided by IHSNot for ResaleNo reproduction or n
21、etworking permitted without license from IHS-,-,-awards will be made only for such products as have, prior to the time set for the opening of bids, been tested and approved for inclusion in the applicable Qualified Products List whether or not such products have actually been so listed by that date.
22、 The attention of the suppliers is called to this requirement and manufacturers are urged to arrange to have the products that they propose to offer to the Federal Government, tested for qualification, in order that they may be elgible to be awarded contracts or orders for the products covered by th
23、is specification. The activity responsible for the Qualified Products List is the Naval Air Systems Command, Department of the Navy, Washington, D. C., 20360. 6.3 Precedence of documents - When the requirements of the contract, this specification, or applicable subsidiary specifications are in confl
24、ict, the following precedence shall apply: (a) Contract - The contract shall have precedence over any I specification. -. 14 (b) This specification - This specification shall have precedence over all applicable subsidiary specifications. Any deviation from this specification, or from subsidiary spec
25、ifications where applicable shall be specifically approved in writing by the procuring activity. (c) Referenced specifications - Any referenced specification shall have precedence over ail applicable subsidiary speci- fications referenced therein. All referenced specifications shall apply to the extent specified. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
