EDIATec ECW100 Manual de instrucciones - Página 3

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2. How it works

ECW100 receives position and movement information from an internal 16 channel GPS

receiver with an external antenna. A pressure sensor further enhances the accuracy of

position measurements. The predicted flight path is calculated by ECW100 and the infor-

mation transmitted by radio as low-power digital burst signals at one-second intervals.

Provided they are within receiving range, the signals are received by further aircraft also

equipped with ECW100 (or other FLARM compatible units). The incoming signal is com-

pared with the flight path predicted by calculation for the second aircraft. At the same

time, ECW100 compares the predicted flight path with known data on obstacles, includ-

ing electric power lines, radio masts and cable cars.

If ECW100 determines the risk of dangerous proximity to one or more aircraft or obsta-

cles, the unit gives the pilot warning of the greatest danger at that moment. The warning

is given by a whistle sound (beep) and bright light emitting diodes (LED). The display

also gives indication of the threat level, plus the horizontal and vertical bearing to the

threat. During circling flight different methods of calculation are employed to those used

during straight flight.

The GPS and collision information received from other aircraft can also be made available

for third party equipment (e.g. external display, speech synthesizer, PDA) via a serial

data output.

The operating range is very dependent upon the antenna installation in the aircraft. The

normal range is about 2 km. In individual cases the range may be up to 5 km, which can

be valuable for fast sailplanes with a speed of up to 250 kt ground speed, providing the

pilots in both aircraft with a warning enabling visual identification and reaction to the

potential hazard. Warnings are given in order of the time remaining before the potential

collision, not the geometrical distance. The first warning level for another aircraft is de-

livered when less than 18 seconds remain to the possible collision; the second warning

level is delivered when less than 13 seconds remains; the third level when less than 13

seconds remains. The warning times for obstacles are somewhat greater.

The warnings continue as long as ECW100 calculates a threat of collision. The warning

level may decline or be cancelled, depending upon the prediction. The warnings are se-

lective; they are only issued if the calculation reveals a high probability of collision in the

near future.

In addition, ECW100 operates as an IGC-compatible flight recorder including the G-

record if this software option has been configured. However, there is no intention to IGC-

homologize the unit as Flight Recorder.

With the standard February 2006 obstacle databank there is memory for more than 50

hrs of flight recording at a 4s interval. Use the SD card to download flights to your PC

and to properly configure your device for flight recording. Flight recording automatically

starts when the aircraft is moving and ends when the unit is switched off. Switching off

or rebooting the device during the flight results in separate flight record files. Allow at

least 2 minutes (if the interval is 4s, our recommended value) after landing before you

switch off the device else you loose the last part of the flight. Allow more time after land-

ing if the interval is higher. When the memory is full, the oldest data is overwritten. Al-

ways download you flight data before you update the obstacle databank or the software.

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