Wet Start
 

Does a wet start stress the engine alot, or is it ok.

Starting my Sonic 120 as my verry first turbine, I did not fill enough gas into the onboard tank. Fuel was injected into the turbine, but the gas flame went out too early for the fuel to ignite. Next startup, was ofcourse a wetstart, and it was spitting flames out the exhaust because of the unburnes fuel.

Does this kill the turbine if this happens too many times ?
What are the temps during normal startup, and then with a wetstart ?

Thanks SJ.


Flames look exesively wild because it was dark....
http://bornholm.adsl.dk/modelfly/files/roo/flame1.jpg

http://bornholm.adsl.dk/modelfly/files/roo/flame2.jpg

Wet Start
 

The pics you posted do not look too bad. I do not think you will have any problems. Next time you run out of propane, shut the engine down and spin it with the electric starter to evaporate the raw fuel. wait few mins before next start up. In a very wet start up, a properly programmed ecu should shut down the turbine. You will get the feeling of proper propane amount after a few starts. I hope this helps.

Starting turbines at night time.
 

Hello SJN.

When you start turbines and it is dark it will always look like that and this is no problem at all. :D it is great running turbines at night just remember you will see light glowing red at just 500 C.

If you start a turbine with some fuel left in the bottom of turbine there will always be flames at the right or left lower part of the exhaust depending of the rotation direction of the actual turbine.
a wet start like this is not a problem for the turbine, with the number of cycles we put in to turbines in model airplanes it will not have any effect on the living time of your turbine at all.

The Fadec will allow a start to continue under the following conditions, the temp must not be over 800C for more that 5 sec and there have to be a constant positive RPM at a pre programed rate

So Just have fun ;)

Best regards

Lars @ home with the influenza. :(
SimJet

Wet Start
 

Get better soon Lars.

Chris

Chris
 

Thanks Chris

I will due my very best , we have a kind of influenza epidemic i Denmark right now , :(

Hope to see you soon in DK Chris i will make some flæskesteg for you :D :D

Lars

Wet Start
 

You make me drool already my friend and please, lots of gravy with it, hehehe.

BRG,
Chris

Wet Start
 

Thanks guys...

Ill sleep better at night now :-).


SJ.