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Appendix
Turbine states
The turbine passes through several different states as it progresses from the start-up phase
(-> ignition) to normal running (-> rpm control transferred to the pilot).
The transition from one state to the next involves what are known as transitional states.
The current turbine state is displayed in the Run menu under “STATE”.
Explanation of turbine states
Value
Explanation
-OFF-
RPM-slider is at position 0 (= OFF -> turbine shut down, turbine cannot be
started.
In this state all LEDs are switched off.
Stby/START
RPM-Slider at centre position, -> turbine is ready for starting. In this state
the LEDs light up to indicate that starter can be activated. As soon as the
measured turbine speed is high enough, the process moves to the next
state: "Ignite".
Ignite...
In this state the glowplug is switched on, and the propane valve is opened.
The Jet-tronic now waits until ignition has occurred.
The Jet-tronic remains in this state until at least one of the following
conditions is fulfilled:
a) The measured exhaust gas temperature exceeds about 120°C
b) The measured EGT rises at a rate exceeding 25°C/sec
c) The measured rotational speed of the turbine exceeds 17,000 rpm
If one of these three conditions is fulfilled, the process moves to the next
stage (AccelrDly).
If the turbine has not ignited within about 30 seconds, the ignition attempt
is halted, and the process moves to the "Slow-down" state.
The red "Ignition" LED on the GSU / LED board indicates that the glowplug
is switched on.
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.
Содержание JetCat 6810
Страница 31: ...31 Bedienungsanleitung ...
Страница 101: ...31 Operating Instructions Graupner Jetcat Modell Helicopter Turbine PHT 3 ...
Страница 107: ...37 Wiring diagram fuel pump and starter glowplug Connections overwiew of the turbine s operating components ...
Страница 171: ...31 Instructions d utilisation ...
Страница 177: ...37 Schéma de connexion Pompe à carburant et Starter Bougie Connexions des éléments de commande Généralité ...