The Dynatest 6875 Runway Friction Tester is an accurate and repeatable, self-contained continuous friction measuring equipment (CFME) that provides coefficients of friction (Mu) on airport runways. 

The 6875 is designed for both functional (maintenance) and operational testing to evaluate surface friction including changes due to weather contaminants and rubber contamination. Operational friction testing can be performed during such adverse weather as heavy rain, ice, slush or snow.

The 6875 is a fully instrumented pickup truck available in either two wheel or four wheel drive. It uses a Dynatest Two-Axis Force Transducer mounted on a retractable fifth wheel assembly.

The test assembly provides real time vertical load and horizontal tractive force measurements. The 6875 meets all the FAA and ICAO specifications for friction measuring devices and is listed in both the FAA AC 150/5320-12 approved device list and the ICAO Airport Services Manual.

System electronics include a laptop computer and inkjet printer with user-friendly Windows® software, which allows the operator to control the test procedure including test speed, self-wetting or dry testing, test method (FAA or ICAO), test type (manual or automatic) and annotate airfield test conditions for later reference.

Data is presented in either ICAO or FAA format with all data being stored for further use in ASCII format. Data stored includes the raw load and traction data, speed, water flow, optionally GPS coordinates, air temperature and pavement temperature and texture (MPD) data. Friction numbers can be printed at every foot, meter or other desired interval. Mu data and speed are visible real time during the tests on both the laptop computer and the dash mounted information display.

The system includes the industry’s largest 300 U.S. gallon (1200 litre) built in, aluminum, baffled water tank, positive displacement water pump and laminar flow water nozzle for self-wetting testing of up to 44,000 ft.+ (13400 m+) of runway without refilling. Larger water tank sizes available on request.