SAE AIR81C-2011
Importance of Physical and Chemical Properties of Aircraft Hydraulic Fluid

Standard No.

SAE AIR81C-2011

Release Date

2011

Published By

Society of Automotive Engineers (SAE)

Status

Be replaced 2016-04

Replace By

SAE AIR81D-2016

Latest

SAE AIR81E-2019

Scope

This document discusses the relative merits of the physical and chemical properties of hydraulic fluids in relation to the aerospace hydraulic system design, and the related materials compatibility. The discussion in this report applies both to hydrocarbon and phophate ester based aircraft hydraulic fluids. In some cases, numerical limits are suggested, but, in general, the significance and effect of a property is noted qualitatively.

SAE AIR81C-2011 history

• 2019 SAE AIR81E-2019 Importance of Physical and Chemical Properties of Aircraft Hydraulic Fluids
• 2016 SAE AIR81D-2016 Importance of Physical and Chemical Properties of Aircraft Hydraulic Fluids
• 2011 SAE AIR81C-2011 Importance of Physical and Chemical Properties of Aircraft Hydraulic Fluid
• 2011 SAE AIR81-2011 HYDRAULIC FLUID CHARACTERISTICS
• 2000 SAE AIR81B-2000 Hydrocarbon-Based Hydraulic Fluid Properties
• 1995 SAE AIR81A-1995 Hydrocarbon-Based Hydraulic Fluid Properties