Runway Friction Testing Equipment

The SARSYS Friction tester SAAB 9-5 Wagon (SFT) are one of the most sold friction tester in the world, around two hundred airports worldwide are using this kind of friction tester today.

BASIC PRINCIPLE AND GENERAL DESCRIPTION
The measuring system consists of a measuring wheel which is mechanically geared to one of the rear main wheels of the base car. The gear ratio is such that when moving along the runway the measuring wheel cannot follow the runway surface freely but rolls with a certain, fixed slip ratio.



The friction against the runway surface, in combination with the vertical load on the measuring wheel, creates forces on the measuring wheel mechanism and these forces are continuously measured by the electronic sensor system. The signals from the sensors are processed in the computer system in the SFT and the Friction coefficient, or the Friction number, the relation between the horizontal and the vertical forces acting on the measuring wheel, is continuously calculated and presented by the computer. The result is printed in diagram form on paper by a printer. The measuring results can also be transmitted direct to a receiver by radio link. GPS system and /or be part of the data fed into a general system for reporting runway friction conditions. The computer in the SFT has been preprogrammed to measure and report runway friction in accordance with standards and regulations issued by ICAO, FAA etc. 


MAIN PRODUCT FEATURES OF THE SAAB 9-5 WAGON (SFT)

  • Measuring program in accordance with ICAO and FAA
  • Approved by FAA and SCAA
  • Approved and CE-certified (97/37/EG)
  • EMC tested and approved (EMC/89/336/EEG)
  • Modern technology and Operational efficiency
  • Excellent ergonomics, finger top control
  • Outstanding manoeuvrability 

  • Total operator

Contact

Scandinavian Airport and Road Systems AB (SARSYS)
Box 31

SE-231- 21 Trelleborg

Sweden
  • +46 410 461 10