Wren 44 TurboProp Users Manual. Copyright Wren Turbines Ltd February 2008 Page 14
The exhaust gases are very hot (over 400’C) on leaving the engine and can cause burns to skin
or damage to objects close to it – keep exhausts clear of anything which is affected by such heat.
This engine must not be used near flammable gases, liquid or materials.
Always keep a CO
2
or similar fire extinguisher close by when operating this engine.
Turbine fuel is poisonous to living beings. Keep it away from the mouth and eyes and from
contact with skin. Always store it in a marked container out of reach to children.
Turbine fuel has a relatively high flash-point but in certain circumstances can be highly
flammable. Keep it away from heat and sources of combustion.
The starting gas (propane) is highly flammable and must be used with extreme care. Maintain
canister and fittings in good leak-proof condition. Protect from sunlight and prevent exposure to
temperatures exceeding 50’C. Keep out of reach of children. Discard used canisters in a safe
place and do not puncture or incinerate, even when empty. Avoid deliberate inhalation.
Ensure gaseous propane only is supplied to the engine, liquid gas must not be allowed to pass
into the system. Gas supply must be disconnected until ready for immediate use. Gas is heavier
than air and can fill a model if allowed to leak unchecked, and become a potential explosion
hazard.
Turbine oils can be hazardous to health and must not be allowed to come into contact with skin,
mouth, eyes or through ingestion, accidental or otherwise. Take care when decanting and ensure
any spillage is wiped away immediately and clean any affected area with warm soapy water..
Wash hands and any affected part immediately after any contact.
Turbine oil can discolour or affect certain paint finishes . Take precautions to prevent spillage.
Do not discard or allow any spillage to run into drains.
If removing the glow-plug to test it, keep fingers or bare skin away from possible burn from the
glowing element – use a metal tool or appropriate insulation.
As operator, it is your responsibility to ensure any spectators (especially small children) or helpers
are kept well away from the engine whilst it is operating. The safest position to operate the engine
is in the area behind the propeller. The area sideways on to the engine is potentially the most
dangerous area due to the rotating propeller. You and people around you must keep well clear of
this to a safe distance. In certain light a turning propeller can become invisible – add some colour
to the propeller tips if you notice this with yours. If operating from a pit area take special care as
safety distances are often difficult to maintain and passers by can appear without warning.
Keep all helpers close by and brief them fully on their duties before starting the engine. One
helper should carry out the role of fireman. Ensure they are aware of what to do in event of
emergency and where to position the extinguisher if required.
Never attempt to alter the starting characteristics of the engine by spraying ignition agents into
the intake, as might be used for gasoline and diesel engines. A dangerous fire and flashback may
result.
Please note, the exhaust of a gas turbine has a pleasing smell to enthusiasts of gas turbines but
others may find it offensive. Please have consideration for others when running your engine in
their proximity.
