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AusJets arrow News arrow AusJet FAQ
AusJets FAQ

- Semi-auto verse Full-auto start?

Semi-auto requires you to manually turn on your start gas, then lightly spin the turbine using a handy starter or a source of compressed air then ignite the gas then continue to spin the turbine until a specified sustainable speed at which at some point you will turn off your start gas as the engine ascends to idle. After shut down it is necessary to cool the turbine until about 100deg C. Benefits is that this is can be up to almost a pound lighter and take less space in the aircraft. Con is you have to start it.  It takes practice but it is reliable and fun.

Full-auto is just that, you turn your airplane and transmitter on move your throttle up and down and the turbine starts all by itself governing its own spooling, ignition and start gas and fuel all the way through the cooling cycle. Pro is that once it is set up it works well. Con is that it is heavier and takes more space in the aircraft.

- What else do I Need?

There are a few things that you need when running a turbine.

1. A CO2 or Powder Fire Extinguisher, this is an M.A.A.A requirement during startups. You can find good prices here http://www.firebrokers.com.au/p/388206/brand-new-firex-20kg-co2-fire-extinguisher-2be.html

2. A Source of GAS for starting (butance cans for small portable gas stoves is great and inexpensive)

3. Fuel of course, if you can get Jet-A1 its great, if you cant look into kerosene from Bunnings or similar. Clear Kero is best. Whichever you get, it needs to be mixed with 5% of oil to provide lubrication to the bearings. This is 1 Litre of Oil to 20 Litres of petrol.

4. Filters. The fuel injection sticks and the lube restrictor in these Engines are very small, therefore any fuel should be filtered mutiple times. First when fueling the Aircraft. The fuel should be filtered at the pickup from your fuel storage container, then is should be filtered again by a low micro filter such as the festo filter in our products catalogue. The fuel should also be filtered as is passes to the tubine in the aircraft. The first filter should be the clunk in the fuel tank, then the Air Trap Tank also contains a filter. Finally there should be a fine filter before entering the turinbe (such as a Hangar 9 final filter). Where possible a festo filter should also be on the gas start line.

- Why use a UAT?

Air bubbles in the fuel feed to a turbine can cause a problematic fuel supply, leading to a flame out in the turbine. Once the turbine has flamed out, the aircraft must be landed deadstick. A universal Air Trap catches the air bubbles in the small tank, feeding them back into the main tank via the vent. This ensures a filtered, air free fual source for your turbine.

 
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