Propeller Overspeed Limiter
This feature applies to Turboprop engines and is a preset used to set a top limit to the propeller rpm
independent of power setting. If the preset limit is exceeded such as in a dive or with too small a
propeller, throttle setting will be automatically reduced.
Please note top limit for high ratio gearboxes is 6000rpm, for low ratio is 8000rpm.
Max prop RPM setting is accessed in the RUN menu. Range is 4,000rpm to 8000rpm.
Default is 0, which means it is disabled, prop RPM increases with engine power but will not exceed limit
for each gearbox ratio.
Engine Installation: Electrical connections
All versions of the X45 are very simple to install but main thing to be very careful of is any cable or
battery connector which is not standard or has been modified in some way, as this can risk reverse
connection of power supply which will easily destroy ECU and other components, so please be extra
vigilant before using junkbox cables and/or adapters.
For the heli engine we have supplied a short engine cable of 250mm (10”) as there is usually just a short
distance to go in any direction in a helicopter airframe. All the servo type connectors are just double end
socket type as available in many outlets. Be careful to select JR type compatible leads as the pin sizes
for Futaba can be smaller, thus making a looser and troublesome connection.
It´s always best to use those supplied in the engine package which have been used in setting the engine
up for its factory tests.
Please don´t give in to temptation.
If you don´t have the recommended type battery, please obtain one
of the recommended types (2S LiPo recommended, or 3S LiFe, others are not supported). Do not risk
ruining your engine by trying to get it going by using a mains type power supply which makes no sense
anyway with a helicopter. Such a power supply would have to be very smooth (regulated) and capable of
very high peak current at the exact recommended output voltage and such units are rare. A battery
charger or similar will almost certainly be unregulated and have high voltage peaks which will destroy the
components of the engine, and such use invalidates your warranty.
Just order yourself a good, high quality battery of the recommended type and use the wait for it to arrive
by checking through your installation and these notes.
When it does arrive
please double check the polarity of the connector supplied before plugging in.
A reverse polarity battery connection WILL destroy the ECU and engine components.
The very briefest of puffs of smoke is all the notice you will get you have killed the ECU
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