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Air Cycle Air Conditioning Systems for Military Air Vehicles

AC-9 Aircraft Environmental Systems Committee
  • Aerospace Standard
  • AS4073A
  • Current
Published 2018-08-23 by SAE International in United States
This SAE Aerospace Standard (AS) defines the requirements for air cycle air conditioning systems used on military air vehicles for cooling, heating, ventilation, and moisture and contamination control. General recommendations for an air conditioning system, which may include an air cycle system as a cooling source, are included in MIL-E-18927E (AS) and JSSG-2009. Air cycle air conditioning systems include those components which condition high temperature and high pressure air for delivery to occupied and equipment compartments and to electrical and electronic equipment. This document is applicable to open and closed loop air cycle systems. Definitions are contained in Section 5 of this document.
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Air Quality for Commercial Aircraft Cabin Particulate Contaminants

AC-9 Aircraft Environmental Systems Committee
  • Aerospace Standard
  • AIR4766/1
  • Current
Published 2018-08-23 by SAE International in United States
This SAE Aerospace Information Report (AIR) covers airbone particulate contaminants that may be present in commercial aircraft cabin air during operation. Discussions cover sources of contaminants, methods of control and design recommendations. Air quality, ventilation requirements and standards are also discussed.
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Aircraft Compartment Automatic Temperature Control Systems

AC-9 Aircraft Environmental Systems Committee
  • Aerospace Standard
  • ARP89D
  • Current
Published 2018-08-23 by SAE International in United States
The recommendations of this SAE Aerospace Recommended Practice (ARP) for aircraft compartment automatic temperature control systems are primarily intended to be applicable to occupied or unoccupied compartments of civil and military aircraft.
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Air Conditioning Systems for Subsonic Airplanes

AC-9 Aircraft Environmental Systems Committee
  • Aerospace Standard
  • ARP85F
  • Current
Published 2018-08-23 by SAE International in United States
This SAE Aerospace Recommended Practice (ARP) contains guidelines and recommendations for subsonic airplane air conditioning systems and components, including requirements, design philosophy, testing and ambient conditions. The airplane air conditioning system comprises that arrangement of equipment, controls and indicators that supply and distribute air to the occupied compartments for ventilation, pressurization, and temperature and moisture control. The principal features of the system are: a A supply of outside air with independent control valve(s). b A means for heating c A means for cooling (air or vapor cycle units and heat exchangers) d A means for removing excess moisture from the air supply e A ventilation subsystem f A temperature control subsystem g A pressure control subsystem Other system components for treating cabin air such as filtration and humidification are included, as are the ancillary functions of equipment cooling and cargo compartment conditioning. The interface with the major associated system, the pneumatic system (Chapter 36 of ATA 100) is at the inlet of the air conditioning shutoff valves. This boundary definition aligns with that in theā€¦
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Air Quality for Commercial Aircraft Cabins

AC-9 Aircraft Environmental Systems Committee
  • Aerospace Standard
  • AIR4766
  • Current
Published 2018-08-23 by SAE International in United States
This SAE Aerospace Information Report (AIR) provides information on air quality and some of the factors affecting the perception of cabin air quality in commercial aircraft cabin air. Also a typical safety analysis process utilizing a Functional Hazard Assessment approach is discussed.
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Aircraft Turbine Engine Pneumatic Component Contaminated Air Endurance Test

AC-9 Aircraft Environmental Systems Committee
  • Aerospace Standard
  • ARP4014A
  • Current
Published 2017-09-05 by SAE International in United States
This SAE Aerospace Recommended Practice (ARP) describes a method of conducting an endurance test using contaminated air when the applicable specification requires non-recirculation of the contaminants. The objective of the test is to determine the resistance of the engine mounted components to wear or damage caused by the contaminated air. The method described herein calls for non-recirculation of the contaminants and is intended to provide a uniform distribution of the contaminant at the inlet to the Unit Under Test (UUT). The UUT may require the use of a hydraulic fluid for actuation of components within the test unit. Contamination of the test hydraulic fluid is not part of this recommended practice. If contaminated hydraulic fluid is required by the applicable test specification, refer to MAP749.
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Environmental Control Systems Terminology

AC-9 Aircraft Environmental Systems Committee
  • Aerospace Standard
  • ARP147E
  • Current
Published 2017-06-20 by SAE International in United States
This ARP provides the definition of terms commonly used in aircraft environmental control system (ECS) design and analysis. Many of the terms may be used as guidelines for establishing standard ECS nomenclature. Some general thermodynamic terms are included that are frequently used in ECS analysis, but this document is not meant to be an inclusive list of such terms.
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Environmental Control System Contamination

AC-9 Aircraft Environmental Systems Committee
  • Aerospace Standard
  • AIR1539B
  • Current
Published 2017-06-19 by SAE International in United States
This publication will be limited to a discussion of liquid and particulate contaminants which enter the aircraft through the environmental control system (ECS). Gaseous contaminants such as ozone, fuel vapors, sulphates, etc., are not covered in this AIR. It will cover all contamination sources which interface with ECS, and the effects of this contamination on equipment. Methods of control will be limited to the equipment and interfacing ducting which normally falls within the responsibility of the ECS designer.
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Jet Blast Windshield Rain Removal Systems for Commercial Transport Aircraft

AC-9 Aircraft Environmental Systems Committee
  • Aerospace Standard
  • AIR805D
  • Current
Published 2017-05-25 by SAE International in United States
Information in this report is applicable to design and development of aircraft jet blast windshield rain removal systems.
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Thermophysical Characteristics of Working Fluids and Heat Transfer Fluids

AC-9 Aircraft Environmental Systems Committee
  • Aerospace Standard
  • AIR1168/10A
  • Current
Published 2017-05-19 by SAE International in United States
This AIR is arranged in the following two sections: 2E - Thermodynamic Characteristics of Working Fluids, which contains thermodynamic diagrams for a number of working fluids currently in use and supplied by various industrial firms. 2F - Properties of Heat Transfer Fluids, which contains data, primarily in graphical form, on fluids that are frequently used in fluid heat transfer loops. Other properties of the environment, gases, liquids, and solids, can be found, as follows, in AIR1168/9: 2A-Properties of the Natural Environment 2B-Properties of Gases 2C-Properties of Liquids 2D-Properties of Solids
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