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VT80BL Instruction Manual
Page 11
JETS MUNT S.L
Failsafe:
Never fly with the failsafe set to “hold”. It is strongly recommended that you setup your
radio system with the correct failsafe settings. In some countries is mandatory that the
engine stops in 2 seconds in the case of a failure of the radio link.
To program correctly the failsafe on your radio:
1) Adjust the travel of the throttle channel from -100% (stop position) to +100%
(full power)
2) Adjust the ecu to your radio as described above.
3) Adjust the failsafe position of the throttle channel in your radio to a -125%.
If all is correctly adjusted, the ecu will stop the engine immediately when receive the STOP
signal (-100%), but if the signal received is Failsafe (-125%) the ecu will set Idle power
during 2 seconds, and, if after these 2 seconds the Failsafe condition persist, will shutdown
the engine.
Once you have the radio programmed, you can check it by setting the throttle to the
different positions, including switching off the transmitter; in this case the “failsafe”
reading should be displayed.
There are many more parameters that can be modified in the ECU, but we have specifically
programmed your VT80 ecu with the optimum settings, further adjustment should not be
required and can only be carried out by Jets Munt SL or your authorized dealer.
Preparing the engine for running
A suitable platform/table/workbench is now required to clamp the test stand onto. Make
sure this can be easily transported outside and weight enough to ensure it cannot be blown
over by the thrust of the engine.
Select a clear area for running – keep clear of areas with loose leaves, sand or other debris
that could be picked up or drawn towards the intake. Ensure the fuel tank is position well
clear of the exhaust area and secured.
Important notes for kerostart engines.
PLEASE READ
The kerostart system used on this is a reliable and well tested that produce very smooth
and trouble free starts.
However, extra care and attention must be paid when starting a kerostart engine.
The main difference between gas and kerosene is that in the case of a failed ignition, the
gas dissipates quickly on the air and don't keep inside the engine. Kerosene is liquid and, if
unburned, will pool inside the engine and stay there forever. The engine can hold a big
quantity of kerosene inside. This kerosene will be ignited on next successful start up and
will be pushed to the exhaust as soon as the airflow inside the engine is sufficient, and will
be ignited in the exhaust, causing a hot start (in extreme cases a big fireball) that surely
will not hurt the engine, but can destroy the model.