GRAUPNER JetCat P60 Instructions D'utilisation page 69

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AccelrDly Delay before the pump voltage is increased.
In this state the fuel pump is operated at a constant voltage for a period of about two
seconds. During this period the turbine has a chance to pick up rotational speed, with the
fuel pump switched on and running at its lowest setting. Once the two-second period has
elapsed, the process moves on to the next stage: "Acceler" (= accelerate / increase
speed).
In this state the glowplug is switched off.
The red "Pump running" LED lights up to indicate that the pump is switched on.
Acceler. In this state the turbine is run up to a speed beyond the idle speed. This is achieved by
automatically and progressively increasing the fuel pump voltage, starting from the initial
value.
In this state the yellow "Standby" LED glows to indicate that the turbine must continue to
be spun up. The red "Pump running" LED lights up to indicate that the fuel pump is
switched on.
Under normal conditions the rotational speed of the turbine should now continue to rise
until it eventually exceeds the programmed idle speed. Once this is the case, the process
moves on to the next state: "Stabilise".
If any of the following error conditions should occur, the Accelerate phase is halted, and
the process moves to the "Slow-down" state:
The turbine fails to reach and exceed the idle speed within about 40 seconds.
The increase in turbine speed is inadequate.
The measured exhaust gas temperature is too high.
Stabilise The turbine has accelerated successfully to idle speed, and is now automatically
stabilised at around 55,000 rpm.
As soon as the turbine speed has been stabilised fully at this speed for at least one
second, the process moves to the next state: "Learn LO".
LearnLO In this state the turbine is automatically stabilised at the idle speed. The Jet-tronic
maintains the turbine at the idle speed until the operator moves the throttle stick to idle.
Once this has occurred, and the turbine is running at idle speed, the process moves on to
the next state "RUN (reg)".
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RUN (reg.) The turbine is now in normal control mode, i.e. the operator can set the thrust of the
engine to any level by positioning the throttle stick accordingly.
In this state the green "OK" LED lights up to indicate that the pilot has control of thrust.
The control system remains in this state until the turbine is shut down.
AutoOff The 3-position switch on the transmitter (AUX channel) is moved forward (-> AutoOff
position).
The turbine is brought to the "Stable RPM" speed, and after about 6 seconds is
automatically shut down.
SlowDown In this state the fuel pump is switched off and the shut-off valve closed.
The system remains in this state until all the following conditions are fulfilled:
The turbine speed is below 800 rpm
The exhaust gas temperature is below 95°C
The 3-position switch is at the "OFF" position.
Once these conditions are met, the process progresses to the "OFF" state.
This state is confirmed by the green "OK" LED flashing; all the other LEDs are off.
Manual The Jet-tronic is in manual mode, which is confirmed by the yellow "Standby" LED
flashing.
The operator quits manual mode by pressing the "Manual" button, or by moving the 3-
position switch to OFF.
SpeedCtrl Speed control mode (only with airspeed sensor connected). The system regulates the
model's airspeed automatically (see page 37).
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