Bulletin Nº3, Rev2, Page 1 of 2,

January 13th - 20th, 2018

Bulletin Nº3, August 2017

Dear Pilots: According to Bulletin Nº1 issued on June, here you will find more information about the tracking system we have in Chile. One of the requirements for participating in the World Final Sailplane Grand Prix 8th series in Vitacura - Chile is that due to the orography of the Andes Mountains terrain is to use a FLARM/OGN external antenna on the outside of the glider. The external antenna will be connected to the OGN tracker provided by the organisation. For the Flarm unit we recommend to have a similar antenna inside the cockpit. In the Americas the Flarm/OGN frequencies are on the ISM band (915 MHz) with frequency hopping, so it requires an antenna for that frequency and we recommend the following: https://www.air802.com/900-928-mhz-antenna-dipole-rubber-duck-2.5-dbi-rp-sma.html The antenna has to be placed below the cockpit pointing down and requires a 7 mm diameter hole on the fuselage (the drain hole could be used for this purpose), the antenna is connected to a coaxial cable (50 ohm, we recommend Aircell7 or Ecoflex 10 given the frequencies that we use) to the OGN external antenna SMA female connector. See picture below. Although the installation of the cable and socket is relatively simple, we suggest you install the coaxial cable and antenna socket prior to shipping your sailplane. If this is not possible and you need help with the installation, it can be done by our staff, before the scrutineering, assuming the sailplane arrives in good time prior to the event. This is the tracker (there will be two different models). It has to be placed on the dashboard as GPS receiver is internal. It requires 12V power supply only.

Location of the external antenna

Currently the organization team has installed 18 OGN stations covering the competition area. The investment has been immense since 2016, in order to guarantee a great performance for the final. As you may know, OGN stations have several advantages that make it very popular worldwide specially in flatlands, however in the Andes Mountains, the terrain demands lots of strategic

Bulletin Nº1, July 2012

Bulletin Nº3, Rev2, Page 2 of 2,

January 13th - 20th, 2018

Bulletin Nº3, August 2017

planning to install the stations in the right place and with the required power. Thanks to local and IGC support, coverages up to 160 km have been reached. Here you can see the OGN coverage, with the antennas placed as mentioned before:

More information to follow soon. General email contact:

René Vidal rvidal911@gmail.com