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The NAC-Dynamic Friction Decelerometer (NAC-DFD®) is an electronic friction testing device designed for airport runways. This 3-axis mobile iOS™ application enables airport operators to "spot-check" contaminated surfaces during winter runway operations. Key features include:
Accurate Measurements: Records vehicle braking values by measuring the "g" force or lock-wheel braking action during qualified tests.
Automated Reporting: When used with a vehicle mounting device, it automatically generates final reports segmented into runway thirds: "touchdown," "midfield," and "rollout."
Comprehensive Data Recording: Captures all necessary data, including time, date, operator, and assigned user ID.
Versatile Contaminant Selection: Allows operators to choose from 14 different contaminant types for reporting runway conditions during winter operations.
Easy Data Export: Supports exporting results using the standard print function.
The NAC-DFD® assists airport operators in assessing the effectiveness of friction-enhancing treatments by indicating trends in runway friction levels. It is approved by the Federal Aviation Administration, as listed in Advisory Circular 150/5200-30C, Appendix 3.