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Engine dying (fuel pump)

Posted: Fri 10. Jun 2011, 15:26
by Zefirro
Hi!

Thank you again Mathias for that great plane!
I found something strange - after a certain amount of time (about half an hour?) my engine dies (it happened to me three times - always flying around 1800rpm and 0.8atm). First time I landed in a field. The engine restarted when I changed the fuel pump to the alternative (position 3) one.
Yesterday (or this night) I had the same problem, and my engine restarted immediately in flight when I changed the pump. But more funny was that when I was about to land, on final it happened again - I changed to the pump 1 again, and it solved the problem.

Do you have any idea what can it be?

Re: Engine dying (fuel pump)

Posted: Fri 10. Jun 2011, 15:28
by Mathias Pommerien
Zefirro,

what is your initial fuel load?
If that happens again, please open the fuel editor and write down the content of each fuel tank.

Re: Engine dying (fuel pump)

Posted: Fri 10. Jun 2011, 15:42
by Zefirro
I'll do that!
By the way, when I want to edit the fuel page, I can't exit it through "OK". The sim complains with: "Please enter a number between 0.00 and 12.55" (I use imperial units.) When I lower left/right tanks fuel level, the same happens to center tanks "Please enter a number between 0.00 and 8.59". Lowering to 8.58 manually helps.

Re: Engine dying (fuel pump)

Posted: Fri 10. Jun 2011, 16:48
by helitom
Hello to all,

I´ve just installed this great plane, i observe the same fuel problem, i assume the tanks are all "overfilled" initially, more than 100%!

Best regards from ETHB

Thomas

Re: Engine dying (fuel pump)

Posted: Sat 11. Jun 2011, 01:14
by Zefirro
I did a trip of more than 1 hour today and I made an observation. I filled the tanks with (in galons):
LeftMain 12.54
RightMain 12.54
Center2 6.0
Center3 6.0
External1 0.0
External2 0.0

At some point the engine has died. I noticed that the fuel at that time was: 12.54, 12.54, 6.0, 0.0, 0.0, 0.0. So fuel had been taken first from Center3.
When I changed the pump selector to position number 3, engine started again.
When the last drop of fuel was taken from Center2, engine died the second time.

I hope that this observation can help. I am just wondering whether it is only problem of my configuration or something more general.

Re: Engine dying (fuel pump)

Posted: Sat 11. Jun 2011, 10:17
by Mathias Pommerien
Ah ok, looks as if it doesn't take the custom fuel code correctly.
Now to the daunting task of ironing out the whyabouts.
I have to ask this to exclude user error:
Did you edit any of the XML gauges?
Secondly, are you running other software that might attempt to control your fuel? Talking about FSUIPC for instance.

Re: Engine dying (fuel pump)

Posted: Sat 11. Jun 2011, 22:26
by Zefirro
I've done some tests.
First, I've reinstalled the plane. Then I removed dll.xml, to have the sim out of any other add on. (I have only free FSUIPC and I don't use it to anything except of FSInn.)
And I've not touched your holy gauges :)


And the problem has occurred again. But I made another check. After loading the fuel ( everything full except of the external tanks) I moved the fuel pump selector. After some time I checked the levels in the fuel manager and it solved the problem a bit. It means that fuel was taken from the all tanks, but still from Center3 more than from the other.
So I did a test again. I refilled the tanks (without shutting the engine). After some time I checked that the fuel was used only from Center3. I refuelled again, but first I moved the fuel pump selector, and the fuel was taken from all tanks (but still much more from Center3).
I hope that it can help a bit.

BTW, I have a second needle in my oil temperature gauge, which always points down. Is it correct?

Re: Engine dying (fuel pump)

Posted: Sat 11. Jun 2011, 22:31
by Mathias Pommerien
Ok thank for the detailed report! I will look into it.

The second needle is ok. Since it's a restored aircraft they used whatever was working, and most of all, what was available so the Bad Nauheimer guys used an oiltemp gauge of a twin engine aircraft.

Re: Engine dying (fuel pump)

Posted: Sat 11. Jun 2011, 22:40
by Zefirro
Wow, great to now, you have put there even so tiny real elements which give this plane uncommon taste!

Re: Engine dying (fuel pump)

Posted: Sat 11. Jun 2011, 22:57
by Mathias Pommerien
You have an E-mail, Zefirro!