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Standard

Synchros

1955-07-01
HISTORICAL
ARP461
This document is limited to units meeting the definitions of para. 1.3 and covers the following general class of synchros: 26 volt, 400 cycle synchros 115 volt, 400 cycle synchros 115 volt, 60 cycle synchros
Standard

Single-Degree-of-Freedom Spring-Restrained Rate Gyros

2008-02-16
CURRENT
AS1104
This specification covers that gyroscopic instrument normally defined as a "subminiature rate gyro." The rate gyro, when subjected to an angular rate about its input axis, provides an AC output voltage proportional to the angular rate. The subminiature size category generally includes gyro instruments of one (1) inch diameter or less and three and one-half (3 1/2) inches length or less. This specification defines the requirements for a subminiature spring-restrained, single-degree-of-freedom rate gyro for aircraft, missile, and spacecraft applications.
Standard

SYNCHROS

2008-02-16
CURRENT
ARP461B
This document is limited to units meeting the definitions of para. 1.3 and covers the following general class of synchros:
Standard

SYNCHROS

1959-11-15
HISTORICAL
ARP461A
This document is limited to units meeting the definitions of para. 1.3 and covers the following general class of synchros:
Standard

Remote Servoed Air Data Instruments for Subsonic Aircraft

2008-02-16
CURRENT
AS791
This standard provides minimum performance criteria for air data instruments intended to provide cockpit indication of: a Indicated airspeed (Vi) b Computer airspeed (Vc) c True airspeed (Vt) d Equivalent airspeed (Ve) e Mach number (M) f Altitude (H) g Vertical speed (Hpr) h Maximum operating limit speed (Vmo) i True angle of attack (αt) j Free air temperature (Tfat) k Total temperature (Tt) These functions shall be derived from a central air data computer (AS 417) and through system wiring applied to the respective indicator.
Standard

PRESSURE INSTRUMENTS - FUEL, OIL, AND HYDRAULIC

1954-12-15
HISTORICAL
AS408A
This aeronautical standard covers two basic types of pressure instruments. These are intended for use in measuring fuel, oil or hydraulic pressures as follows: This aeronautical standard does not apply to engine mounted torque meter systems.
Standard

PRESSURE ALTIMETER SYSTEMS

1996-10-29
HISTORICAL
AS8009A
This Aerospace Standard (AS) specifies minimum performance requirements for primary pressure altimeter systems other than air data computers. This AS covers altimeter systems that measure and display altitude as a function of atmospheric pressure. The pressure transducer may be contained within the instrument display case or located remotely. Requirements for air data computers are specified in AS8002. Some requirements for nontransducing servoed altitude indicators are included in AS791. The instrument system specified herein does not include aircraft pressure lines. Unless otherwise specified, whenever the term "instrument" is used, it is to be understood to be the complete system of pressure transducer components, any auxiliary equipment, and display components. The test procedures specified herein apply specifically to analog type instruments. Digital instruments or automatic test instrumentation may require other test procedures.
Standard

PRESSURE ALTIMETER SYSTEM MINIMUM SAFE PERFORMANCE STANDARD

1996-09-01
CURRENT
AS942A
The instrument system specified shall accept an input of static pressure and in some equipment other inputs that contribute altitude information to provide a visual indication of pressure altitude. If equipped with an automatic correction mechanism, it shall indicate by a positive means when the automatic correction mechanism is not in use. If the static source pressure error compensating mechanism is operational it shall be functional throughout the required operating envelope of the particular aircraft. Each aircraft type has its own static source error data which shall be obtained from the airframe manufacturer’s certified data. When a Central Air Data Computer is used in the altimeter system, the CADC shall be certified to its own governing document and the altimeter system (CADC and display) shall comply with the requirements of this document. NOTE: The instrument system specified herein does not include the aircraft pressure lines and pressure sources.
Standard

Numeral, Letter and Symbol Dimensions for Aircraft Instrument Displays

2020-04-01
CURRENT
AIR1093B
The purpose of this AIR is to provide recommendations for the minimum dimensions of characters and symbols used in aircraft instrument dials and panel displays as related to the conditions stated in para. 3. Numerous variables influence the legibility of aircraft instrument dial characters. This situation makes it very difficult, if not impossible, to establish an exact act of rules for optimizing all installations. Character size, one of the important considerations, can be optimized where adequate dial space exists. Usually this is not the case and the designer is faced with placing the information in a limited space while continuing to strive for error-free legibility. Appropriate minimum size requirements have been stated herein for guidance in air transport use.
Standard

Minimum Performance Standard General Aviation Flight Recorder

2008-02-16
CURRENT
AS8039A
This standard covers three (3) basic types of flight recorders as defined below: All requirements specified in Sections 3, 4, 5, 6 and 7 of this standard shall be applicable to all recorder types unless otherwise noted.
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