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Viewing 15061 to 15090 of 15767
1965-02-01
Technical Paper
650302
R. R. Paxton, W. R. Shobert
The special demands of aerospace applications upon carbon-graphite seal components are discussed. Carbon-graphite materials are divided into five major groups with the unique properties of each group listed. The authors describe the influence that environment, operating conditions and seal design have on the proper grade selection. Special materials are required to obtain reliable seal performance with high vacuums, cryogenic fluids, and high temperature gases. Suggestions for handling and using these materials are included.
1965-02-01
Technical Paper
650301
Karl Schoenherr
Seal design is still mostly a “state-of-the-art” knowledge. When the application transcends present experience, certain theoretical considerations must be given to predict end results. Often terms used are not clearly defined. Undefined statements for technical discussions are a relative thing and open to interpretation. Therefore, this paper explains the most commonly used terms of the seal designer’s vocabulary. Seal balance and pressure-velocity values are emphasized from a mathematical viewpoint as well as a physical explanation given. Practical examples from laboratory tests and field results are cited.
1965-02-01
Technical Paper
650337
Richard L. Krebs
The paper discusses the techniques which successfully achieved Grade A hermetic sealing of a complete hydraulic servo system. Design concepts are set forth; actual hardware is illustrated; and supporting data are noted. The system that was sealed included the motor pump, servo valves, relief valve, dump valve, the hydraulic side of the actuator, the filter, and all O-rings. All these components were immersed in the oil reservoir and then sealed from the atmosphere by Grade A hermetic seals.
1965-02-01
Standard
AMS3206A
No scope available.
1965-02-01
Standard
AMS7464
This specification covers premium quality bolts and screws made from a low-alloy, heat-resistant steel and having threads of UNJ (MIL-S-8879) form.
1965-02-01
Technical Paper
650431
D. E. Czernik, J. C. Moerk, F. A. Robbins
The internal combustion engine cylinder head gasket is the most complex of all gasket applications. This is due to the variety of seals and sealing conditions which must be achieved in a single gasket. Some of the physical characteristics studied for such gaskets include spring rate, stress relaxation, torque loss, and permeability of current materials and elements used in these constructions. The effects of temperature, sealing stress, thickness, geometry, and engine operation on the properties of gaskets are discussed. In one of the theoretical derivations given, a mathematical model of a viscoelastic material is used to explain the results of certain experimental testing. Major emphasis is placed on spring rate and stress relaxation, which are directly related to fluctuations of sealing pressure and loss of torque which must be controlled in order to achieve satisfactory sealing.
1965-02-01
Standard
AS417
This Standard recommends the minimum safe operational performance requirements for Air Data Computer equipment for use in Subsonic Turbine Powered Aircraft operating up to 50,000 feet of pressure altitude and 500 knots maximum indicated airspeed. This Standard covers air data equipment (hereinafter designated the instrument) which when connected to sources of aircraft electrical power, static pressure, static pressure, total pressure and outside air temperature (singly or in combination) provides some or all of the following computed air data output signals: Pressure Altitude*, Pressure Altitude (Reporting), Baro-Corrected Pressure Altitude*, Vertical Speed*, Computed Airspeed*, Mach Number*, Maximum Allowable Airspeed*, Static Air Temperature (*when used as an alternate for total temperature), Total Temperature*, Altitude Rate, Overspeed Warning, Altitude Hold, Airspeed Hold, Mach Hold, qc (impact pressure), True Airspeed, Others.
1965-02-01
Standard
AS436
This Aerospace Standard establishes the essential minimum safe performance standards for mach meter instruments primarily for use with turbine powered subsonic transport aircraft, the operation of which may subject the instruments to the environmental conditions specified in Section 3.3. This Aerospace Standard covers the direct reading pressure actuated type mach meter.
1965-02-01
Standard
AMS7279C
This specification has been declared "SUPERSEDED" by the Aerospace Materials Division, SAE, as of 10/17/90.
1965-02-01
Technical Paper
650312
Forrest O. Rathbun
The parameters governing the leakage rate across metal-to-metal and metal gasketed seals are discussed qualitatively and quantitatively based on experimental evidence. The sensitivity of the sealing phenomenon to the surface finish of the mating components is illustrated. The results of several experiments in which flat annular sealing surfaces of both 347 stainless steel and 2024 aluminum were mated together, either directly or with intermediate flat annular gaskets of indium, lead, aluminum, copper, or nickel are presented. It is concluded in this paper that, in order to ignore the surface finish as a parameter in the design of a fluid connector (or the quality control of the surface finish), the normally applied stress to effect sealing must be approximately 2.75 times the yield strength of the weaker material in the system. For surfaces controlled, both in asperity magnitude and direction, the required stress level may be considerably less.
1965-02-01
Standard
AMS7278C
This specification has been declared "SUPERSEDED" by the Aerospace Materials Division, SAE, as of 10/17/90. Use AMS 7276 or 7280
1965-01-31
Standard
AS871
This standard controls the dimensional measurement of preformed packings or circular elastomeric packings. The inspection level, sampling plan, visual inspection for defects and certification or inspection records used to establish acceptability of preformed packings are not controlled by this standard.
1965-01-10
Standard
AIR786
This AIR is intended to disseminate data relative to the compatibility of elastomers in order to aid in O-ring and sealant selection. A secondary purpose relates to the selection of solvents and cleaning agents for components and systems containing elastomeric sealants. This document contains data relative to the chemical nature of aerospace fluids and relates each to its effect upon elastomeric components. Since the compatibilities of elastomers are determined by the compounding as well as the nature of the base polymer, the elastomers considered are limited to finished compounds for which material or performance specifications could be referenced.
1965-01-10
Standard
ARP497A
In order to ease the equipment design engineer's problem and at the same time provide a basis for more accurate comparable measurements between manufacturer and user, this recommended practice sets up "standard conditions" for design assurance testing and tabulated values which differ from previous publications by requiring the motor to be in a warmed-up condition which approximates its average use temperature. These conditions and the basic tests to which the tabulated characteristics refer are grouped in section 2.2 (Design Assurance) and compose a complete list of defining characteristics of the motor. This recommendation establishes objectives for high performance control motors to be used with aeronautical and associated equipment in protective enclosures or completely within the shell of the aircraft so that they are subjected only to the internal climate conditions of heat, cold, shock, vibration, altitude, and humidity.
1965-01-01
Magazine
1964-12-30
Standard
AS848
No scope available.
1964-12-10
Standard
AIR851
To facilitate calculation of O-Ring tension testing values.
1964-12-01
Standard
AIR857
The scope of this SAE Aerospace Information Report (AIR) is a review of the factors contributing to speed variation of d-c motors, a presentation of typical data showing speed variation as a function of certain variables for representative motors, and a recommendation of a means of improving communications between motor users and manufacturers.
1964-09-01
Magazine
1964-08-01
Standard
AS415
This Aerospace Standard covers two types of compensated altimeters which indicate, by visual means, the pressure altitude compensated for the static pressure system errors of the aircraft. TYPE I - Range: - 1,000 to 30,000 feet. Barometric pressure - scale range: at least 28.1 - 30.99 in. Hg (952-1049 millibars). May include markers working in conjunction with the Barometric Pressure Scale to indicate pressure altitude. TYPE II - Range: - 1,000 to 60,000 feet. Barometric pressure - scale range: at least 28.1 - 30.99 in. Hg (952-1049 millibars). May include markers working in conjunction with the Barometric Pressure Scale to indicate pressure.
1964-08-01
Magazine
1964-08-01
Standard
J891_196408
Included herein are complete general and dimensional specifications for metric and inch types of sring nuts recognized as SAE Standard. These nuts are intended for general use where the engagement of a single thread on the mating screw is considered adequate for the application. It should be noted that spring nuts having other configurations, dimensions, provisions for ground, etc., are available and manufacturers should be consulted.
1964-08-01
Standard
J902_196408
This SAE Recommend Practice establishes for passenger cars, light trucks, and multipurpose vehicles with GVW of 4500 kg (10 000 lb) or less, as defined by EPA, and M1 category vehicles as defined by the European Commission: a. Minimum performance standards for defrosting and demisting systems. b. Test procedures that can be conducted on uniform test equipment by commercially available laboratory facilities.
1964-07-01
Magazine
1964-06-30
Standard
AMS7461
APPLICATION: Premium quality bolts and screws for use up to 600 F (315 C) where a high strength lightweight fastener is required.
1964-06-01
Standard
AS269D
This SAE Aerospace Standard (AS) provides material identification codes for aluminum alloys, copper alloys, carbon steels, alloy steels, titanium alloys, corrosion resistant materials, and heat resistant materials that are used to make AN, MS, and AS engine and propeller standard utility parts. This document also provides similar material codes for company parts (such as nuts, bolts, etc.) having design configuration similar to other company parts or the engine and propeller standard utility parts (AN, MS, and AS) that are not of the same material.
1964-06-01
Standard
AMS3389B
This specification covers a synthetic rubber in the form of a nonrigid, smooth bore, noncollapsing-type hose. This hose has been used typically for fueling aircraft, but usage is not limited to such applications. This hose is not intended for flexible connection between tractor and trailer, to be collapsed for drainage, or for operating pressures higher than 250 psi (1724 kPa).
1964-06-01
Standard
AMS3386B
This specification covers a synthetic rubber in the form of soft wall, smooth bore, collapsing-type hose. This hose has been used typically for fueling aircraft from tank trucks or pits where the hose will be rolled flat for stowage on a reel, but usage is not limited to such applications. Not recommended for operating pressures higher than 125 psi (862 kPa).
Viewing 15061 to 15090 of 15767

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