GRAUPNER JetCat P60 Instructions D'utilisation page 66

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Starting the turbine
1. Carry out the start preparations as described in the checklist (see page 6).
2. For safety's sake hold the model nose-up for a brief period to check that there is no fuel inside the
turbine.
3. Move the 3-position switch to OFF (back) (all LEDs must be off)
4. Move the throttle trim forward.
5. Set the 3-position switch to the centre position -> LEDs now start flashing (running lights)
6. Set the throttle stick to idle; the LEDs should now flash in the following sequence:
green -> red -> yellow, green -> red -> yellow ... etc.
7. Move the throttle stick to the full-throttle position (-> turbine now starts).
8. The throttle stick can now be moved back to the idle position again while the turbine runs up to speed.
Provided that the throttle stick is at the idle position, and the turbine has automatically stabilised at its idle
speed, the green "OK" LED will light up to indicate that thrust control has now been transferred to the
pilot.
The fully automatic start-up process is initiated by the Jet-tronic as soon as the throttle stick is moved to the
full-throttle position (Step 6). The starting process can be interrupted immediately at any time by moving the
3-position switch to OFF.
Once the start-up process has been initiated, the following sequence of events occurs:
1. The turbine is run up to about 2500 - 3500 rpm by the starter motor.
2. The glowplug is then switched on, and the propane valve is opened.
3. The speed of the turbine now declines slowly. During this period ignition normally takes place inside the
turbine.
If ignition should not occur immediately at the first attempt, the process is repeated for a second attempt
at ignition (-> Step 1). If the turbine has not ignited within about 30 seconds, the start-up process is halted
(green LED flashes).
4. As soon as ignition takes place, the starter motor continues to accelerate the turbine, until at around
5000 rpm the fuel pump is automatically switched on (-> red "Pump running" LED lights up).
5. The turbine is now run up further until it reaches idle speed. As soon as it is running above minimum
speed, the starter motor is automatically disengaged, and the yellow LED goes out.
6. The turbine is now run up briefly to around 55,000 rpm, and then automatically stabilised at the idle
speed.
7. The turbine now remains running at idle speed until the operator moves the throttle stick back to the idle
position. Once this occurs, the green "OK" LED lights up, and control over turbine thrust is transferred to
the pilot.
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