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Standard

Temperature Instruments (Reciprocating Engine Powered Aircraft)

2008-02-16
CURRENT
AS413B
This Aerospace Standard covers two basic types of temperature instruments as follows: TYPE I: Ratiometer type, actuated by changes in electrical resistance of a temperature sensing electrical resistance element; the resistance changes being obtained by temperature changes of the temperature sensing resistance element. TYPE II: Millivoltmeter type, operated and actuated by varying E.M.F. output of a thermocouple; the varying E.M.F. input to the instrument being obtained by temperature changes of the temperature sensing thermocouple.
Standard

TURN AND BANK INDICATOR

1947-07-01
CURRENT
AS395
This specification covers three basic types of instruments as follows: TYPE I - Air Driven TYPE II - D-C Operated TYPE III - A-C Operated
Standard

TEMPERATURE INDICATOR

1954-12-01
HISTORICAL
AS413A
This Aeronautical Standard covers two basic types of temperature indicators as follows: TYPE I - Ratiometer type actuated by changes of electrical resistance of a temperature sensing electrical resistance element; the resistance changes being obtained by temperature changes of the temperature sensing resistance element. TYPE II - Millivoltmeter type, operated and actuated by varying e.m.f. output of a thermocouple, the varying e.m.f. input to the instrument being obtained by temperature changes of the temperature sensing thermocouple.
Standard

TEMPERATURE INDICATOR

1948-11-01
HISTORICAL
AS413
This specification covers two types of instruments. These instruments are for the purpose of measuring temperature, such as those of oil coolant, carburetor air, free air and cylinder head.
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

SMOKE DETECTORS

1947-07-01
HISTORICAL
AS400
This specification covers two basic types as follows: Type I Carbon Monoxide Type II Photo-Electric Cell
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

Rate of Climb (Vertical Speed) Indicator, Pressure Actuated (Turbine Powered Subsonic Aircraft)

2008-02-16
CURRENT
AS429
This Aerospace Standard covers four basic types of direct reading pressure actuated rate of climb (vertical speed) indicators as follows: Type I - Range 0-2000 feet per minute climb and descent Type II - Range 0-3000 feet per minute climb and descent Type III - Range 0-4000 feet per minute climb and descent Type IV - Range 0-6000 feet per minute climb and descent
Standard

Pressure Ratio Instruments

2008-02-16
CURRENT
ARP427A
This Aeronautical Recommended Practice covers two types of two unit Pressure Ratio Instruments each of which consist of a Transducer and an Indicator. The Transducer computes the ratio of two pressures and converts this ratio to a synchro electrical signal which is transmitted to the Indicator.
Standard

PRESSURE RATIO INSTRUMENTS

1991-05-01
HISTORICAL
ARP427
This Aeronautical Recommended Practice covers two types of two unit Pressure Ratio Instruments each of which consist of a Transducer and an Indicator. The Transducer computes the ratio of two pressures and converts this ratio to a synchro electrical signal which is transmitted to the 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

Numeral, Letter and Symbol Dimensions for Aircraft Instrument Displays

2008-02-16
HISTORICAL
AIR1093A
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

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.
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