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panAero is an Australian company which was established to provide runway friction testing services to airports in order to satisfy regulatory requirements contained in CASA MOS 139 and ICAO Annex 14.

Equipment used is a specialist friction trailer (CASA approved self wetting CFME) with control computers integrated into a modified SAAB 9-5 SportEstate. The trailer is Master Calibrated to ASTM E2100-04 standard to ensure accuracy and repeatability and is capable of being used as a friction reference device. Dual water tanks are installed in the control vehicle which enables the testing of runways in excess of 6,000 metres.

Testing is done to MOS 139 criteria using the guidelines outlined in FAA AC 150/5320-12C. More comprehensive testing to UK CAA CAP 683 is also available if required.

panAero consists of two principles with over 60 years combined experience in the aviation industry. Both are qualified aircraft performance engineers with heavy jet flying experience which provides a unique operational perspective to delivered services.

Specialist Friction Trailer

1. Computer system
The computer system includes the measurement computer, main computer with printer and an operator's panel with only six keys to simplify the handling of the system.

The computer is pre-programmed for measurement and presentation in accordance with ICAO, FAA, and UK CAA CAP 683. The computer system controls the measuring procedure and presents the results on the computer display and/or on a paper printout.

2. Self-watering system
The FAA and ICAO clearly state that a CFME must have a self-watering system. The self-watering system sprays a water layer on the runway surface in front of the measuring wheel. The tank volume is sufficient for measuring more then 10,000 meters of runway with a water layer depth of 1 mm (0.04").

3. Measurement computer
This computer receives analogue signals from sensors and the pulse transmitter (speed) and converts the signals into digital signals that are fed into the computer for calculations and presentation.

4. Torque sensor
When the measuring wheel slips on the runway surface, the friction creates a torque which is transferred to the chain system and measured by a load sensor.

5. Vertical load sensor
This monitors the vertical down pressure created by the hydraulic system, and makes any necessary adjustments to it. It ensures that an absolute constant ground contact pressure is kept.

6. Measuring wheel
A special high pressure tyre, the Friction Tester "Aero" tyre has been developed for operational measurement purposes. Measuring results with this tire have been shown to correlate well with aircraft braking characteristics. For calibration purposes a low pressure tyre can be used. The slip ratio of the measuring wheel is about 13%, the exact value depending on the wear of the measuring tire and trailer tyres.

7. Hydraulic system
This system provides constant pressure for the wheel retraction mechanism and for the vertical load on the measuring wheel.


PANAERONAUTICAL PTY LTD 2006. ABN 66 118 620 938.