New Menu Items
These items are new additions to the regular Xicoy menu structure:
Kero / Diesel selector
Pump min preset
Max Power preset
Gearbox reduction
Governor setting
Propeller overspeed limiter
Kero/Diesel selector
This option switches between preset start routines for Diesel and Kerosene fuels. This saves the ordeal
of having to make adjustments to fine tune the starting every time you switch fuels, now you just press a
button to click your fuel, and fly. Diesel being heavier and higher flashpoint fuel than kerosene, requires a
slightly different start technique to enable it to start quickly and cleanly. We have optimized the engine for
each fuel and have prepared two start routines. Access the START menu and select the fuel option and
leave the ECU to use its preset start routine.
Default setting is Kero.
Pump min preset
This is a minimum value for driving the pump to make enough flow to work the kero burner sufficient for
a start. It is preset at factory at 100 or 125 for test and almost always never needed to be adjusted but is
available if the burner is slow to preheat, or aggressive. Access via the START menu. Can be
incremented up and down one click as required, one click equalling 25.
Default is 125
Replacement pump preset. In event of pump needing replacement for any reason the user can set the
new pump to the default setting (100) and see the heating effect on the engine on a start. If slow to heat
up then the value can be raised to the next level until a satisfactory setting is found. There are a limited
range of values, with jumps of 25 between each so the process is quick and straight forward. We find it
is either set to 100 or 125. Once set, this value can be left and does not need adjusting in normal use.
Max Power preset
To preset the engine full throttle power to a reduced rating there is a simple setting accessed via the
RUN menu which shows maximum rpm with a corresponding nominal shaft power figure. It is easy to
dial in say 2.5kw without having to know the engine rpm setting for this. This adjustment is operative
between 2kw and maximum.
Heli range is 2-4kw default for Heli is 2.5kw. TP range is 2-5kw, default for Turboprop is 4.5kw.
Gearbox reduction
This applies only to Helicopters and is the reduction ratio from the gearbox output to the rotor head. It is
needed to enable the ECU to output the rotor speed correctly for the governor to operate and telemetry
feedback to directly output actual rotor head speed. For the TRex 700 and similar it is usually 8.2:1.
The ratio is entered in the RUN menu. D
efault is 8.2.
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