The unit must be a portable, aerodynamic tow-behind device capable of continuously measuring friction on airport runways. The device must be approved by the FAA and comply with ASTM E2340 Standard Test Method for Measuring the Skid Resistance of Pavement. It should be able to measure the frictional force between an ASTM E1551 test tire, operated at a 12% slip, while being towed across the runway surface. The device should be a portable CFME testing trailer that can be moved independently between vehicles and is not dedicated to a single vehicle. It should be capable of measuring surface friction, drag, and travel distance while accounting for longitudinal and lateral acceleration at 12% slip braking. Additionally, the unit should be self-contained with an onboard power supply, control unit, and water tank. It should be capable of measuring up to 100 km/h (60 mph). The device should collect reliable friction values continuously and display the results graphically. The data collection software should feature touchscreen controls for user convenience and be compatible with the Microsoft Windows operating system. Friction results should be automatically displayed in Mu values, and data exports should be presented in a graphical bar chart, summarizing results for specific runway sections such as touchdown, midfield, and rollout. The software should include a drop-down menu listing various types of contaminants, aligning with the Notice to Air Missions (NOTAM) reporting system. All data collection should be transmitted wirelessly or via a direct serial cable to the tow vehicle laptop or tablet.
