ARP85G Air Conditioning Systems for Subsonic Airplanes

Reaffirmed

10/03/2024

Features
Issuing Committee
Scope
Content
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:
  1. a
    A supply of outside air with independent control valve(s).
  2. b
    A means for heating.
  3. c
    A means for cooling (air or vapor cycle units and heat exchangers).
  4. d
    A means for removing excess moisture from the air supply.
  5. e
    A ventilation subsystem.
  6. f
    A temperature control subsystem.
  7. 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 the ATA 100 Specification.
Meta TagsDetails
DOI
https://doi.org/10.4271/ARP85G
Pages
50
Citation
SAE International Recommended Practice, Air Conditioning Systems for Subsonic Airplanes, SAE Standard ARP85G, Reaffirmed October 2024, Revised September 2019, Issued January 1943, https://doi.org/10.4271/ARP85G.
Additional Details
Publisher
Published
Oct 03
Product Code
ARP85G
Content Type
Recommended Practice
Status
Reaffirmed
Language
English