Objective This SAE Aerospace Standard (AS) establishes the aerodynamic flow-off requirements for SAE AMS 1424 Type I and SAE AMS 1428 Type II@ III and IV fluids used to deice and/or anti-ice aircraft: a. with takeoff rotation speeds exceeding approximately 100 knots@ with time from brake release to rotation speed greater than 20 s@ typical for large transport type jet aircraft. This procedure is referred to as the High Speed Ramp Test. and/or b. with takeoff rotation speeds exceeding approximately 60 knots@ with time from brake release to rotation speed greater than 15 s typical for commuter type aircraft. This procedure is referred to as the Low Speed Ramp Test. NOTE: When compensating measures@ such as increase in rotation speed@ are used in the aircraft takeoff procedure@ the High Speed Ramp can apply. The objective of this standard is to ensure acceptable aerodynamic characteristics of the deicing/anti-icing fluids as they flow off aircraft lifting and control surfaces during the takeoff ground acceleration and climb. NOTE: These test methods are based on glycol-based fluids@ additional testing may be required for non-glycol-based fluids. Fluid Acceptance and Facility/Site Qualification An aircraft ground deicing/anti-icing fluid has acceptable aerodynamic flow-off characteristics if the fluid is tested in accordance with this standard and complies with the acceptance criteria described in Section 6. If results from testing in accordance with this test method are to be used to certify that an aircraft ground deicing/anti-icing fluid complies with the acceptance criteria described in Section 6@ substantiation that the facility and associated staff and resources satisfy the requirements of this test method shall be documented and submitted to the Performance Review Institute@ 161 Thornhill Road@ Warrendale@ PA 15086-7527@ United States of America@ or equivalent qualified third party reviewers@ to qualify the technical suitability and competency of the test site/facility. Such test site/facilities shall be qualified at five-year intervals by submitting current data@ which demonstrate that@ the facility@ procedures@ supporting resources@ and staff continues to produce acceptable data. Safety Hazards This standard may involve hazardous materials@ operations@ and equipment. This standard does not purport to address any@ or all@ of the safety problems associated with its use. It is the responsibility of the standard user to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Significance In Use Aerodynamic acceptance of an aircraft ground deicing/anti-icing fluid is based on the air and fluid BLDT (boundary layer displacement thickness) 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) plate. Testing is carried out in the temperature range at which the fluid@ undiluted and diluted@ is to be used in airline service.