M
Ingenieurbüro CAT, M. Zipperer GmbH +49-7634-5056-800
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28
79282 Ballrechten-Dottingen
www.jetcat.de
GERMANY
Instruction manual JetCat-PRO engines, 1.7 - V12.01V
Operation modes
The JetCat-PRO engine allows for different modes of operation:
Operation mode for propulsion of RC-models (typically radio-controlled models)
Industrial operation mode 0, normal altitudes
Industrial operation mode 1, for high altitude operation of the jet engine, without altitude controlled low
rpm governing.
Industrial operation mode 2, for high altitude operation of the jet engine, with altitude controlled low
rpm governing.
Per default the “Industrial/high altitude” mode is pre-set!
Before making other adjustments, it is highly recommended to first set the desired operation mode and thereafter
make other adjustments, as switching the operation mode will automatically redefine some other settings!
Industrial operation mode, normal altitude
This mode allows for engine operation over a normal altitude range (0-2000m).
If selected, there are further options to “simulate” (dry run) the engine. This allows e.g. to test the serial
communication without hot running the engine.
Industrial operation mode, High altitude-A, without altitude controlled low rpm governing.
This mode allows for engine operation over a wide altitude range (0-10000m). If selected the engine response will be
more relaxed/slower to ensure safe engine operation in a very high-altitude band.
If selected, there are further options to “simulate” (dry run) the engine. This allows e.g. to test the serial
communication without hot running the engine.
Industrial operation mode, High altitude-B, with altitude controlled low rpm governing.
Same as previous mode, in addition this mode will engage a governor system which will make sure that the
commanded engine rpm is verified/limited not being possibly commanded too low for the actual flight altitude!
When flying in higher altitudes, the user otherwise needs to assure that the engine is operated/commanded above a
certain minimum required rpm (otherwise too low mass flows can lead to an engine flameout, especially in altitudes
above 4000m). The ECU will automatically increase idle rpm to a safe value for the actual flight altitude.
This mode is only available in firmware releases equal or higher to V12.01Q.
Operation mode for propulsion of RC-models
This mode ensures optimum throttle response times as well as safe operation of the jet engine for the use in radio-
controlled models/applications. Expected altitude changes on a flight are expected to be less than 1000m.
Setup/adjustment of the operation mode
The operation mode can be changed with the GSU as follows:
1)
Connect the GSU to the system and power up.
2)
Once ECU has booted press blue “Limits” button on the GSU (this calls up the “Limits” menu)
3)
Scroll through the Limits menu just using the +/- buttons until the parameter “Op-Mode” is displayed.
4)
Now press and hold the “change value/item” button and select the desired Op-Mode with the +/- keys.
