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.
Rationale
Changes to specification for Revision C:
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Change to ASTM document number referenced
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Updated tables at the end of the document
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Organizational, editorial and style revisions
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Clarified note concerning non-glycol fluids
SAE G-12 serves as the focal point for all ground de-icing related activities within SAE. G-12 reports directly to the SAE Aerospace General Projects Division (under the SAE Aerospace Council). G-12 provides support and assistance and maintains the responsibility for coordinating projects that cross SAE committee charter boundaries and assure that all aspects of ground deicing are addressed. The project work and preparation of documents is handled by the following G-12 Subcommittees: Deicing Facilities Hold-over Testing Methods Fluids Equipment Ice Detection Training Future Deicing Technology Functions of the G-12 Committee and its subcommittees include (but are not limited to): Providing support and assistance to other industry groups and standardization organizations in aircraft ground deicing related activities. Developing and disseminating documentation deemed necessary for a thorough understanding and implementation of guidelines, policies and procedures reflecting most recent technology for aircraft ground deicing. Promoting safety in the aircraft ground deicing field. Defining and encouraging research and development that is necessary for the advancement of technology.
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AS5900C
Standard Test Method for Aerodynamic Acceptance of AMS1424 and AMS1428 Aircraft Deicing/Anti-Icing Fluids
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Standard Test Method for Aerodynamic Acceptance of AMS1424 and AMS1428 Aircraft Deicing/Anti-Icing Fluids
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