eric_rico

Hi, I have a JetCat P400-PRO engine which I bought last year but I just got the chance to run it recently. I used paraffin with 5% of BP2197 turbine oil which meets MIL23699 standard. The first time I turn it on the exhaust nozzle glew red and the temperature in GSU shows above 850C. I was worried if my engine got overheat so I decided to pull the plug before the engine reaches its idle speed. Can anyone tell me if that's normal? By the way I live in Indonesia with air temperature of 30-32C when I tested the engine. Thanks!

mr_matt

My Feedback: (10)

if it overheats it will shutdown itself. The hottest part of the profile for many turbines is the start up.

Dave Wilshere

eric_rico

didn't know if JetCat has this feature. So, do you think I should let the startup process finish next time?

eric_rico

I've seen several videos on YouTube of people running JetCat engines from P20 to P300 but none of them glowed red. By the way it was at 4.30PM, about an hour before sunset. The turbine glowed red on the entire exhaust nozzle. Do you think tropical climate has something to do with it? I posted my second attempt on YouTube, the turbine temperature rises rapidly 'till it reaches over 850C before I pull the plug. The turbine itself hasn't completed its startup sequence.

Darn,,, I am not allowed to post URLs because I have less than 10 posts. www(dot)youtube(dot)com/watch?v=VKHjUJk1F_Y

Dave Wilshere

Run it in day light and let it finish, I don’t think you have an issue

mr_matt

My Feedback: (10)

I agree with Dave. The turbine shuts down if the temperature stays above a certain threshold for a certain time (an integration) and it will stop instantly at about 940C if memory serves (which it does not sometimes)

eric_rico

Followed your suggestion and it worked. The temperature went above 1000C for a few seconds before the GSU reads "Stabil" and the engine go to idle state. Strangely this time the exhaust nozzle didn't glow at all. Thanks guys!

Quandry

The giant flame at :53 is not so good my friend!! contact your Jetcat dealer for support in setting the start ramp (or similar) settings.

eric_rico

Turns out I used the wrong fuel (paraffin), no wonder the EGT exceeded 1000C during startup. Everything went well after I switched to jet A-1 with shorter startup period and lower EGT below 700C before dropping to 450C at idle speed.

Now I have another brand new P400 and got its thrust tested using loadcell sensor but apparently the sensor reading only showed 27kgf at max RPM (97,000). The generated thrust is no where near the described thrust of 40kgf. Can you tell me what did I do wrong this time? Does humidity affects the generated thrust as well because I live in Indonesia with tropical climate. Thanks!

Dave Wilshere

eric_rico

No, we are using Jet-tronics GSU as the engine is mounted on a bench for testing purpose only. Does high humidity play role in this event? FYI, the altitude of our workshop is <100M ASL with >50% of humidity.