Helpful hint
10-25-2006, 09:32 AM
#1
Helpful hint
As I mentioned in another thread, always be careful during the fueling of the plane. If for any reason the shutoff valve gets clogged, you can pump some fuel into the turbine.
We noticed that some customers were trying to clear any excess fuel in their turbine by tilting the plane onto its tail. There is a problem with this technique.
If you can visualize the inside of the rear of the turbine, a kind of "cup" is formed between the turbine case and the EGV ring. As such, many CCs of fuel could be caught in that "cup" when the plane is pointed tail down.
The better approach is to put a rag up around the front of the turbine and tilt the plane on its nose.
Enjoy!
We noticed that some customers were trying to clear any excess fuel in their turbine by tilting the plane onto its tail. There is a problem with this technique.
If you can visualize the inside of the rear of the turbine, a kind of "cup" is formed between the turbine case and the EGV ring. As such, many CCs of fuel could be caught in that "cup" when the plane is pointed tail down.
The better approach is to put a rag up around the front of the turbine and tilt the plane on its nose.
Enjoy!
10-25-2006, 10:23 AM
#2
RE: Helpful hint
Also tilting the plane nose up lets the fuel run out of the tailcone & on to the floor of the model. You then start up the turbine & set fire to the rear end (Don't ask how I know this).
Regards
Jim
Regards
Jim
11-01-2006, 07:25 AM
#3
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RE: Helpful hint
ORIGINAL: mr_matt
As I mentioned in another thread, always be careful during the fueling of the plane. If for any reason the shutoff valve gets clogged,
Enjoy!
As I mentioned in another thread, always be careful during the fueling of the plane. If for any reason the shutoff valve gets clogged,
Enjoy!
Shouldn't the solenoid prevent fuel going to the engine when fuelling?
11-01-2006, 09:42 AM
#4
RE: Helpful hint
Hello,
I was referring to the solenoid when I mentioned the shutoff valve. If that solenoid/shutoff valve gets clogged with dirt or debris, it can let fuel through. Of course with proper installation/maintanance of the filters this does not happen, but it still needs to be looked out for.
I was referring to the solenoid when I mentioned the shutoff valve. If that solenoid/shutoff valve gets clogged with dirt or debris, it can let fuel through. Of course with proper installation/maintanance of the filters this does not happen, but it still needs to be looked out for.
11-01-2006, 09:44 AM
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RE: Helpful hint
Seems to me that Jetcat supplies a manual shutoff valve with each engine. I would think that the best idea would be to install this shutoff valve between the fuel solonoid and the engine. If the shutoff valve is closed during refueling, none of this would be a problem. Yes, i have forgotton to close the valve but that is another story. I don't think i would rely on just a solonoid valve for keeping the fuel out of the engine during refueling.
11-18-2006, 08:47 AM
#10
RE: Helpful hint
What Mr Matt states makes sense but there is conflicting instructions here.
Page 36 of my Jetcat Manual under the heading Turbine Starting / Running #2 states "briefly hold the model upward to ensure there is no residual fuel in the turbine"
This would explain why Mr Matt has seen guys doing this.
So what is the correct procedure? I have been tilting the nose up as instructed but also have the manual valve between the turbine and the shut off valve.
Dom
Page 36 of my Jetcat Manual under the heading Turbine Starting / Running #2 states "briefly hold the model upward to ensure there is no residual fuel in the turbine"
This would explain why Mr Matt has seen guys doing this.
So what is the correct procedure? I have been tilting the nose up as instructed but also have the manual valve between the turbine and the shut off valve.
Dom
11-20-2006, 04:58 PM
#11
RE: Helpful hint
ORIGINAL: MaJ. Woody
I have been tilting the nose up as instructed but also have the manual valve between the turbine and the shut off valve.
I have been tilting the nose up as instructed but also have the manual valve between the turbine and the shut off valve.
Well I agree the instructions could defintely be made clearer. The correct procedure is to hold the model nose down.
Hope that helps,
Regards,
01-14-2007, 09:42 AM
#13
RE: Helpful hint
just to pipe in here... i think the better location for the fuel shut off valve would be between the uat and the fuel pump. the reason being these fuel pumps can build a lot of presser if restricted after the pump and could blow a line off fittings. i was amazed one time after a flight to find my 50 oz. fuel tank colapsed because i forgot to remove the tank vent plug. i may be wrong but it makes sense to me.
ORIGINAL: saddler
Seems to me that Jetcat supplies a manual shutoff valve with each engine. I would think that the best idea would be to install this shutoff valve between the fuel solonoid and the engine. If the shutoff valve is closed during refueling, none of this would be a problem. Yes, i have forgotton to close the valve but that is another story. I don't think i would rely on just a solonoid valve for keeping the fuel out of the engine during refueling.
Seems to me that Jetcat supplies a manual shutoff valve with each engine. I would think that the best idea would be to install this shutoff valve between the fuel solonoid and the engine. If the shutoff valve is closed during refueling, none of this would be a problem. Yes, i have forgotton to close the valve but that is another story. I don't think i would rely on just a solonoid valve for keeping the fuel out of the engine during refueling.
10-08-2007, 03:13 PM
#15
RE: Helpful hint
John,
you can get Festo shutoff valves at www.digitech-turbines.com
specifically it's located on this page: http://www.digitech-turbines.com/sho...s/dept_20.html
Regards,
Carsten
you can get Festo shutoff valves at www.digitech-turbines.com
specifically it's located on this page: http://www.digitech-turbines.com/sho...s/dept_20.html
Regards,
Carsten
07-09-2009, 09:25 PM
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RE: Helpful hint
Hi, yesterday and today i was tried to start my p-80 but it didn't ignite, i have problems about ignition. glow plug is ok, red light work properly but the gas doesn't ignite, tomorow i'm going to try with new gas, what do you recomend me?
08-19-2009, 07:22 PM
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RE: Helpful hint
Hi Matt, I'm tslking to smithy at ausjet turbine maint man and he said I should drop you a line with regards to Jetcat suppling counter rotating turbines? I'm in the planning stages of F14 tomcat. Its still away off but imgetting my info together.. Can these be supplied from you or do I have to get one modified some where else?
Cheer's Scott
Cheer's Scott
08-19-2009, 07:42 PM
#19
RE: Helpful hint
ORIGINAL: Stylmast
Hi Matt, I'm tslking to smithy at ausjet turbine maint man and he said I should drop you a line with regards to Jetcat suppling counter rotating turbines? I'm in the planning stages of F14 tomcat. Its still away off but imgetting my info together.. Can these be supplied from you or do I have to get one modified some where else?
Cheer's Scott
Hi Matt, I'm tslking to smithy at ausjet turbine maint man and he said I should drop you a line with regards to Jetcat suppling counter rotating turbines? I'm in the planning stages of F14 tomcat. Its still away off but imgetting my info together.. Can these be supplied from you or do I have to get one modified some where else?
Cheer's Scott
the torque produced by these turbines is so insignificant that counter rotation is of no benefit.
