The BOWMONK AFM2 is a compact, portable electronic instrument for measuring
and recording the maximum deceleration possible on an airport runway or road
surface. The AFM2 is recognised worldwide and approved by leading civil
aviation authorities, including the FAA, the Japanese Civil Aviation Bureau,
the Romanian Civil Aeronautic Authority and Transport Canada.
The BOWMONK AFM2 is the modern day equivalent of a mechanical decelerometer
such as the Bowmonk Brakemeter or Tapley Brake Meter.
It contains a solid state accelerometer and an accurate crystal controlled
clock. During a friction test the accelerometer measures the deceleration
(g-force) experienced by the transporting vehicle, 400 times per second with
an accuracy of better than 2%. The output is read by a microprocessor and stored
in the 128 Kb memory for automatic analysis at the end of the test.
In use the BOWMONK AFM2 is simply positioned on the passenger seat or in the
footwell of the test vehicle - usually a good condition pick-up with balanced
springing and good tyres. The vehicle does not need to come to a complete stop
to calculate runway friction.
Control and setting of the BOWMONK AFM2 is via a seven button keypad which
provides for airport, runway and operator identification.
The BOWMONK AFM2 is fitted with a two line alpha-numeric liquid crystal
display. This is used to prompt the user for command entry via the keypad,
to indicate results and to give any error messages. Night time operation is
facilitated by back-lighting of the display panel.
The BOWMONK AFM2 contains a miniature dot matrix impact printer capable of
printing text in 40 columns and graphics of 240 dots per line. Printout of results
is obtained by pressing the Print button whilst viewing stored readings.
The printout will show individual friction readings, averages for each third of the
runway and a total average of all friction readings taken. The printout will not fade
and duplicate copies can be taken automatically.
The BOWMONK AFM2 is powered by an internal rechargeable battery. When fully
charged this will power the instrument for at least 12 hours testing and
printing. The battery voltage and charge can be shown on the display.
*The AFM2 is ABS compatible, however please refer to your local aviation
authority for advice on its use with ABS enabled vehicles. For example, the
FAA allows portable electronic decelerometers like the AFM2 to be used with
ABS-equipped vehicles (with no requirement to disable the ABS), as detailed
in its Advisory Circular 150/5200-30D.
In other FAA news, in October 2016 changes were made to the process of
assessing and reporting airport runway conditions. The FAA has confirmed
that runway friction assessments should still be used, even though friction
readings no longer need to be included with every Field Condition (FICON)
report submitted to the NOTAM system.
Records true vehicle deceleration
Compatible with ABS braking systems
Stores up to 99 friction readings.
Provides hard copy printouts of up to 99 friction tests
together with calculated total runway average or thirds.
Compensates for peaking due to initial vehicle pitching.
Indicates friction values 10% below average and disregards tests
cancelled by operator or considered faulty.
Permits field programmable airport name, runway and operators
through keypad or bar codes.
No mounting kit or
connections to the vehicle are required
character high contrast alpha-numeric liquid crystal display with back
lighting for night-time visibility.
switches, with beep, for selection purposes.
Automatic cancellation of faulty friction tests.
Manual cancellation of any test if required.
Provides for temporary suspension of friction testing with no
loss of recorded data.
128 kilobyte CMOS memory with battery backup.
Built in 6 volt rechargeable battery (external voltage for
battery recharge 9v to 18v DC), powers unit for at least 12 hours.
Can be recharged from mains power pack or car cigarette lighter
Built in temperature compensated accelerometer records runway
friction coefficient in compacted snow and ice conditions as %g.
FAA approved for winter runway friction testing
WINTEROPS™ PRO SOFTWARE
The Bowmonk AFM2 electronic recording decelerometer has been on Transport
Canada’s list of approved devices for many years. Airport operators can now
rely on this device to integrate with Team Eagle’s WinterOps™ Pro, Runway
Surface Condition Reporting software solution.
TranSafe, Bowmonk and Team Eagle Ltd. have
worked together to enhance the output of the data available from the Bowmonk
AFM2 to allow this information to be electronically exported for use within Eagle’s
GPS based WinterOps™ Pro.
The Bowmonk AFM2 electronic recording decelerometer has been on Transport Canada’s list of approved devices.
Note: The WINTEROPS™ PRO version of the Bowmonk AFM2 is only available
through its supplier, Team Eagle.
Measurement range: 0 to 1.4g.
Dimensions: just 14 x 22 x 8 cm.
Clock battery life: 5 years.
Operating temperature: 0°C to 40°C.
Storage temperature: -20°C to + 60°C.
Replacement of battery.
Replacement of printer ribbon and paper.
For preventative maintenance purposes we recommend an annual
recalibration and recertification of accuracy by BOWMONK during the
An operator manual is provided - no special training is
No installation is required. Velcro backing will hold
the AFM2 securely to the front seat or floor well.
Input for measuring and printing temperature.
All stored results can be downloaded to a PC-compatible
computer via a USB port.
If required, a graphical print-out of each friction test
showing the variation in friction along the runway can be