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Setting up
Radio control system
Jet powered helicopter models are usually equipped with many additional electronic systems in
addition to the actual receiving system, e.g. the ECU, gyro systems, undercarriage control
systems etc. For this reason we strongly recommend the use of a PCM receiver, as the digital
transmission technology which they exploit completely suppresses brief interference signals.
Every interference signal which strikes a conventional FM receiver, no matter how brief, imme-
diately and inevitably generates a random control surface movement.
The failsafe circuit of the radio control system should be set to throttle back the turbine to idle if
interference should occur.
Receiver aerial:
When installing the receiver aerial follow closely the advise and instructions oft the
manufacturers oft model and RC system!!!
Additional installation notes:
The turbine ECU should not be located immediately adjacent to the receiver (distance > 10 cm).
The leads from the ECU (battery, pump, data bus, turbine lead) should be kept well away from
the receiving system leads (e.g. servo leads)!
And never forget:
!!! Before the first flight, or after the installation of new or additional components, carry out a
range check !!! (min. 50 m with transmitter aerial collapsed).
"Teaching" the radio control system
The PHT3 helicopter turbine ist normally controlled by a single channel which must not be
influenced by any throttle/collective pitch mixing and is normally operated by a slider
control.
The mode of operation of this „rpm-slider" is as follows:
• fully back
• mid position
• range mid...full
• full
In normal operation the turbine's rpm (and by this the main rotor rpm, too) is selected by the
slider and governed by the ECU („FADEC"); the main rotor thrust ist controlled by the collective
pitch only.
Note:
Normally the AUX-channel of the PHT3 is not used and therefor is not interrogates
within the r/c teach-in procedure; the accordingly marked wire is not plugged in the
receiver.
For special functions, however, the AUX-channel is required; its connection cord in
plugged into a free outlet of the receiver, preferably operated by a 3-position
switch. Use of the AUX-channel has to be activated in the corresponding menus.
Off
Standby/idle
rpm selction
trigger starting sequence/max. rpm
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