SAE AS 81587 pdf download

SAE AS 81587 pdf download.Timer Assembly Rain Repellent.
This specification covers the requirements for an interval timer for controlling the duration of an electrical pulse to a solenoid valve for use in Rain Repellent systems covered by Specification
MIL-R-81 589.
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 extent specified herein:
Specifications
Military
MIL-C-501 5 Connectors, Electric, AN Type
MIL-E-5272 Environmental Testing, Aeronautical and Associated Equipment, General Specification for
MIL-E-5400 Electrical Equipment, Airborne, General Specification for
MILE-i 7555 Electronic and Electrical Equipment and Associated Repair Parts. Preparation for delivery of
MIL•R•81589 Rain Repellent Fluid Application System, Aircraft Windshield
Federal
PPP-T-0060 Tape, Pressure Sensitive Adhesive-Water Proof Standards
MIL-STD-105 Sampling Procedures and Tables for Inspection by Attributes
MIL-STD-129 Marking for Shipment and Storage
MIL-STD-130 Identification Marking of U.S. Military Property
MIL-STD-171 Finishing of Metal and Wood Surfaces
MIL-STD-454 Standard General Requirements for Electronic Equipment
MlL-STD461 Electromagnetic Interference Characteristics, Requirements for Equipment
MIL-STD-704 Electric Power, Aircraft. Characteristics and Utilization of
MIL-STD-831 Test Reports, preparation of
MS-3102 Connector, Receptacle, Electric Box Mounting
MS-3106 Connector, Plug. Electric, Straight
MS-29527 Valve, Fuel Shut Off, Solenoid Operated 28 Volts DC
(Copies of specifications. standards, drawings and publications required by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.)
3. REQUIREMENTS:
3.1 Preproduction:
This specification makes provision for preproduction testing.
3.2 Parts and Materials:
Approval for the use of non-standard parts and materials other than microelectronic devices shall be based on Category II of Specification MIL-E-5400.
3.2.1 Non-Standard Semiconductors: Approval for the use of non-standard and non-preferred semiconductors shall be in accordance with Military Standard MIL-STD-454, Requirement 30.
3.2.2 Vacuum Tubes; No vacuum tubes shall be used.
3.3 Design and Construction:
The timer shall be a complete, self-contained unit consisting of an interval timing circuit, electromechanical or solid state, a connecting receptacle and an enclosure. Design shall conform to the requirements of Specification MIL-E-5400, Workmanship shall conform to Military Standard MIL-STD-454, Requirement 9. Electromagnetic relays shall comply with Military Standard MIL-STD-454, Requirement 57.
3.3.1 Weight: The total weight of the timer shall be a minimum consistent with good design and shall not exceed 0.5 pound.
3.3.2 Container: The timing circuit shall be enclosed in an aluminum alloy container cylindrical in form with a maximum outside diameter of 1-3/4 inches and a maximum length of 2-5/8 inches, not including the connector. The container shall be finished in accordance with Finish Numbers 7.1.1 plus 21.3 of Military Standard MIL-STD-171, Black No.27038. A 1/4 inch diameter hole may be provided in the container for access to the timer adjustment. The hole shall be covered with pressure sensitive, water-proof, adhesive tape, Specification PPP-T-0060, Type I, Class I and sealed with one coat of shellac.
3.3.3 Operating Power; The timer shall provide the specified performance when energized from a 28 volt d.c. power source with power characteristics conforming to Military Standard MIL-STD-704 for Category B utilization equipment. The electrical load for the timer operation is defined by solonoid valve, Military Standard MS-29527-1.
3.3.4 Timing Circuit: The timing circuit shall provide a 28 volt d.c. pulse to a solenoid valve which conforms to Military Standard MS-29527-1. A single timed pulse shall be initiated by a 28 volt d.c. electrical pulse not longer than 0.5 second duration. The timed pulse from the timer shall be adjustable from 1.0 to 5.0 seconds. The timer adjustment shall be accessible with the timer assembled. The timer shall not be capable of automatic recycling. The timer shall be set by the contractor to the time interval specified in the pi’ocurement document.