Concepts, Electronica, Plane Aerial Concepts Belgium, Patric Dietvorst, AS3X, Spektrum, Telemetry
I am using a Spektrum DX9 Black Edition Transmitter in mode 2. The DX9 possesses a number of class-leading features. Easy programming, 250 models. The centerpiece is its incredibly advanced voice and vibration alert system.
I am using the AR9350 9 channel as RX. This is a new generation of Spektrum™ AS3X® with Artificial 3-aXis stabilization. The AS3X System works behind the scenes to stabilize an airplane in whatever attitude you command. A. small aircraft behaves like a bigger one and can the more wind influence. This multiLink receiver gives you the protection of as main receiver connected to two satellite receivers. By mounting the smaller satellite receivers away from the main receiver in different orientations, the odds of all of them experiencing signal reflection at the same time are reduced to a statistical impossibility.
This RX has built-in Telemetry capability. This telemetry module keeps tabs on the quality of the signal coming to the receiver and send this information back to the transmitter where it is represented on the LCD screen and logged o the SD card.
I am using a Flight Pack Energy Sensor is designed to measure battery capacity used. By measuring the current the sensor determines how much capacity has been used by your electric power system. This is more accurate than a voltage sensor. Every 60 secs the TX-voice gives the used capacity. When the capacity of the battery is 30% the TX gives a repeating audio alarm you have to clear (push clear button). After this alarm, you have enough capacity to perform a safe landing (if necessary one go-around).
I am using an airspeed sensor (a pitot tube-based pressure measurement which measures airspeed from approximately 20 km/h to 300 km/h. I am using a switch to get the TX-voice telling me the actual speed at the moment I like to know this information. But more important is a vibration alarm when airspeed drops within a safe zone just above stall speed. This is a very good landing aid. Try to stay just above this alarm until you are about 1m above and at the beginning edge of the landing strip. Flare at stall speed when the plane is maximum 50 cm above the field and gentle land the plane and let the plane slow down on the airstrip or the grass field.
Offline, all telemetry data logged on the SD card can be viewed and analyzed on a Windows PC with the Spektrum Telemetry viewer. Some examples are added to the Spektrum photo link on this page.