user manual

Page 13

Fuel System

The input and output fuel tubing must be connected to the electronic shut-off valve as

per the diagram on page 16.

When installing the fuel lines on components with barbed connectors, slightly heat the

tubing and lubricate the barbes before connecting. This will soften the tube, making it

much easier to install. Double looping safety wire on all barbed connection is also

required. To remove tubing from barbed connectors, you must cut the tubing off. Be

careful not to damage the barbs when cutting off tubing. To insert tubing into Festo

quick release fittings, use firm pressure until you feel the tube snaps in then lightly

pull on the front ring and tubing to ensure a good seal. To release, press in on the

front ring, while slightly pushing the turning the tubing then pull the tubing out for a

clean release.

ALWAYS use a gasoline-compatible stopper. Silicon stoppers swell and leak.

Check your fuel filters every ten (10) flights. You may be surprised how rapidly they

can clog up! The filter is installed with the O-ring located toward the fuel pump.

Use caution not to pinch o-ring when assembling filters. We recommend to smear a

little oil on the O ring mounting the fuel filter vertically. This will provide a better seal

from the O ring and limit the possibility of air being trapped inside and then coming

out at an inopportune time. It is also better not to affix it but to leave it free to

slightly move.

When running the engine at full power, check the fuel line from the pump to the

engine. If there is a large quantity of air bubbles flowing with the fuel, there is

probably a restriction in the fuel system or an air leak in at least one of the many

fittings.

Be careful not to over-pressurize the kerosene tanks and the kerosene shut off valve

during refueling operations. You might pump a bit of raw fuel past the valve and into

the turbine, and subsequently have a wet (hot!) start. We are now requiring a

manual shutoff valve downstream of the automatic kerosene shutoff valve, as an

additional precaution.