AS5900D Standard Test Method for Aerodynamic Acceptance of AMS1424 and AMS1428 Aircraft Deicing/Anti-Icing Fluids

Revised

08/03/2020

Features
Issuing Committee
Scope
Content
This SAE Aerospace Standard (AS) establishes the aerodynamic flow-off requirements and test procedures for AMS1424 Type I and AMS1428 Type II, III, and IV fluids used to deice and/or anti-ice aircraft.
The objective of this standard is to ensure acceptable aerodynamic characteristics of the deicing/anti-icing fluids as they flow off of aircraft lifting and control surfaces during the takeoff ground acceleration and climb. Aerodynamic acceptance of an aircraft ground deicing/anti-icing fluid is based upon the fluid’s boundary layer displacement thickness (BLDT) on a flat plate, measured after experiencing the free stream velocity time history of a representative aircraft takeoff. Acceptability of the fluid is determined by comparing BLDT measurements of the candidate fluid with a datum established from the values of a reference fluid BLDT and the BLDT over the dry (clean) test plate. Testing is carried out in the temperature range at which the fluid, undiluted and diluted, is to be used in airline service.
NOTE: No additional testing is required for non-glycol fluids at this time. For more information about non-glycol fluids, please refer to AMS1424 and AMS1428.
Rationale
Content
Changes to specification for revision D:
  • Organizational, editorial, and style revisions.
  • Modified note concerning non-glycol fluids to include AMS1428.
  • Additional test temperatures for AMS1428 neat fluids.
  • Change the high speed ramp acceptance criteria to a straight line.
  • Two appendices explaining rational behind modifications to test temperatures and high speed ramp acceptance criteria.
Meta TagsDetails
DOI
https://doi.org/10.4271/AS5900D
Pages
33
Citation
SAE International Technical Standard, Standard Test Method for Aerodynamic Acceptance of AMS1424 and AMS1428 Aircraft Deicing/Anti-Icing Fluids, SAE Standard AS5900D, Revised August 2020, Issued February 2003, https://doi.org/10.4271/AS5900D.
Additional Details
Publisher
Published
Aug 3, 2020
Product Code
AS5900D
Content Type
Technical Standard
Status
Revised
Language
English

Revisions