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Recommended commercial oil is
Deluxe Power Model Jet Oil.
Other commercial turbine oils like Kingtech oil, Fuchs… can be used.
Don’t use Jetcat oil or Jackadofsky oil on the X45. These cause a lot of bearing drag when
cold causing difficult or impossible start-up.
It is allowed to use a 5% of oil contents for compatibility with other engine brands; this will
cause a higher fuel consumption and increased possibility of internal carbon building. Use 4% for
X45 if not using the recommended oil.
Full size turbine oils can be used, but are not recommended because these oils are not in-
tended to be burned; they are irritant and contain neurotoxic chemicals such as tricresyl phos-
phate that in long term could impact negatively on the health of operators and other persons
breathing the exhaust fumes.
Aeroshell 500 should not be used at all due to high residues left on bearings.
Do not use 2 stroke oil alone (4%). This will gum the bearings causing difficult or impossi-
ble start-up when engine is cold.
Please refer to the Xicoy Office for guidance in the first instance in event of any issue or concern.
Engine Description
The X series engines are miniature turbojets designed and produced specifically to produce thrust
to power small model aircraft. Each has a single stage billet machined centrifugal compressor and
single stage cast Inconel axial flow turbine mounted on a single shaft. The engine is fitted with a
long life ceramic glowplug which enables the engine to initiate combustion directly on liquid fuel
after which further fuel is gradually introduced into the main part of the combustion chamber to
provide combustion heat to operate the engine. A high speed brushless electric starter motor fitted
with a clutch mechanism to the front provides drive to the rotor up to and beyond self-sustaining
speed for starting the engine. The starting sequence is controlled by an electronic system fitted to
the engine (ECU) which initiates the start sequence and controls the parameters of the engine
within design limits.
The engine rotor shaft is supported by two ceramic bearings which are lubricated by a small per-
centage bleed off the pressurized main fuel supply, which should contain a small percentage of oil
for this purpose. The rotor discs are separately balanced and then 2-stage dynamically balanced
on assembly to the engine. Disturbing the rotor will lose this delicate balance and the engine will
need to be returned to a service unit for rebalancing.
The fuel for the engine is provided from a fuel tank and fed through a small pump driven by a 3-
phase (brushless) motor that has its own intelligent control. Each engine has its own dedicated
pump type and may not be mixed.
