User Manual
X45
Version 1.0/2019
Copyright © 2019 by Xicoy Electrònica S.L. All rights reserved
Page
10
To control the admission of fuel to the burner and main combustion chamber there are two miniature electric valves
attached to a mounting block fitted to the front of the engine, under the cover. This block also holds the 4mm quick-
release fuel feed connection. The valves are connected to and controlled by the ECU as required by the starting
sequence. The valve block assembly is replaceable but the individual valve assemblies are not user serviceable.
The battery power for the engine can be within the range 7.4v to 9.9v, so 2S LiPo and 3S LiFe are suitable.
Installation Notes
1.
The engine should be mounted securely using only the strap mount supplied.
2.
The 3-wire connecting cable from the engine to the connector board should be carefully routed away from the
engine intake so there is no possibility of the wire being accidentally ingested if the FOD screen should be displaced
for any reason. Avoid placing the cable close to the engine rpm sensor which is located at approximately 4 O´clock
when viewed at the front of the engine with the cable entry plug at 12 O´clock. A cable too close can cause some rpm
interference at start-up. The same goes for any servo wires passing near.
3.
The 4mm fuel feed pipe should be routed similarly clear of the intake.
4.
The other end of the engine cable should plug into the Hub sited at a convenient location for access. This is
also the location to connect the ECU battery. If battery is sited at some distance perhaps in the nose of the aircraft,
please contact Xicoy and ask for a longer cable in one piece. Please don´t cut it and splice in a couple of old bits of
wire to make it longer. A heavy duty extension can be used but check polarity before plugging in. Its always better to
have a longer single piece cable for minimum volt drop and maximum reliability.
5.
The centre of the fuel tank should be located as close to the centre of gravity (CofG) of the model as possible.
This will minimize the effects of the CofG shifting as the fuel is used during the flight. The fuel tank should have an
effective fuel pickup, like a felt clunk or felt bag over a weighted clunk to ensure no air is pulled into the fuel feed.
6.
The fuel pump should be located close to the fuel tank as convenient. Fit the inline filter between tank and
pump to protect the pump from particles that could jam the pump. The pump has two 3mm screw fixing holes
provided for mounting to the airframe.
7.
Run a single piece of tubing between the pump and the engine.
Do not install anything
(valves, filters,
flowmeters..) between the pump and the engine.
8.
If using “Tygon” flexible piping from fuel tank push on a short (12mm/1/2”) length of the supplied 4mm pipe
onto the pump suction port and push the “Tygon” over the top to provide a tight leak free fitting. A double wrap of
lock-wire will ensure secure connection. Otherwise, use the 4mm piping supplied.
DO NOT use tie wraps anywhere on the fuel system.
9.
DO NOT use “Tygon” flexible piping anywhere for the pressure (delivery) side, it is only suitable on the suction
side. Also
DO NOT
use silicon tube anywhere in the fuel system as the fuel will melt it.
