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+--- Thread: Fuel flow (/showthread.php?tid=6592)
Fuel flow - Zeder - 14-09-2006
Hello,
Flying a CRJ-200. On my last flight, the tank right emptied much faster than the left tank. I have realised it, but I hopped,
that the total fuel will be enough. And it was. After landing, the right one was empty
>>> But I got a bonus, because I have successful landed with a 'problem'.
My question: What shall I do in such cases for the future
Re: Fuel flow - Enzo - 14-09-2006
probably on your flight report you have something saying: your right tank had a fuel leak...
I usually declare an emergency and land at the next suitable airport.
Re: Fuel flow - Zeder - 14-09-2006
Hi Enzo,
Quote:probably on your flight report you have something saying: your right tank had a fuel leak...
I don't think so, because fuel flow from left tank was very 'low'. At begin of flight, both flows are approx. similar and suddenly
I realized, that left flow are very low and right flow very fast. And no voice occurs like 'Dear captain, we have a problem '
But now if it comes again, I will do as you means.
Re: Fuel flow - Enzo - 14-09-2006
Well you know your flight report better then me. So if there is no fault message then there is something wrong with your aircraft. BTW, I did
never have a voice telling me that there is something wrong when I had a fuel leak...
Re: Fuel flow - poden - 14-09-2006
When there's a fuel leak being simulated by FSP, I've never heard the co-pilot say anything. I'm not sure that's an emergency you should declare.
Does anyone else know? Drew? Anybody?
Re: Fuel flow - Ceemosp - 14-09-2006
Hello Ruedi,
there are a few possible scenarios for your situations:
A: You accidentially set the cross flow to the one tank (thus feeding both engines from one side)
B: You had a fuel leak.
In case A the fuel flow would not be affected as both engines will receive the same amount of fuel just from one tank.
In the other case you may have noticed a different fuel flow if the leak was in between the fuel pump and the engine as the pump would
deliver the right pressure but the fuel would be lost afterwards and thus not supplying the engine sufficently.
In that case you would want to do the following:
- Declare an emergency,
- Set transponder to 7700
- Look for the next airport (IRL for an airport with wide runway and fire brigade
) - Shut down the engine affected
- Try to transfer the fuel from the bad side to the good side (given your plane simulates such).
Why would you want to shut down the engine, I can hear you asking.....
In real life a fuel leak would bear an imminent danger of fire and as you don't know WHERE the leak exactly is, you want to make sure by
shutting down the fuel pumps and the engine.
Note: In FS9 there should be no consecutive fire so you don't HAVE to shut down the engine but still for reality's sake I would
Greetz Carsten
Re: Fuel flow - Zeder - 15-09-2006
Hi Carsten,
Thanks for this detailled informations.
I guess, the 'keyword' for me was 'squak to 7700'.
They will be a good help for such cases.
Finally just this: The leak occurred during the flight, as I remember.
But for me, this case is closed.
Thanks to ALL of you for responses
Post Edited ( 09-15-06 17:45 )
Re: Fuel flow - Neil Jackson - 22-09-2006
Quote:Zeder wrote:
I guess, the 'keyword' for me was 'squak to 7700'.
They will be a good help for such cases.
Finally just this: The leak occurred during the flight, as I remember.
But for me, this case is closed.
Sorry to re-open your case, Reudi, but I thought it might be important to pass on a few more insights into this, in case anyone stumbled
across it in the future and got confused.
I think the 'fuel flow' part of the problem is actually a red herring or distraction. It's far more likely that you looked at the fuel flow gauges at
different stages of the flight and got confused; FF is highest during a take-off and climb, but during the cruise or descent, it will usually
drop as the throttles are pulled back or idled. On the approach, especially under autopilot control, it will often hike upwards, if the AP is
slowing the rate of the descent or trying to maintain the glidepath. In order to read anything into the FF conditions, you would need to
compare the situation with another exact same situation (eg, compare Cruise FF to Cruise FF, Descent FF to Descent FF), to really make
a good call on that information!
OK - for me, the 'giveaway' piece of info is the fact that you got notified of 'a problem' in your Flight Report - this means that definitely FSP
was doing something to you. Carsten's explanation A above (about maybe you opened the crossfeed valve and pumped all the fuel from
tank A to tank B, perhaps) IS a very good explanation for why you might have an empty tank on landing (nice one Carsten
) - but the fact that the Flight Report says you had a problem rules that out. It was FSP, not you!
If you check in your Pilot's Flight Log, you should still be able to access the flight details - and it may even tell you about the presence of a
leak. I think these are just copies of the actual Flight Report for each flight - and mine certainly did inform me about a leak (rather than just
a blanket 'problem') when I landed.
Most importantly, your aircraft will need repairs! I had to spend about £400,000 to repair the ruptured fuel tank on my 737-700 last night
(but the insurance paid 2/3rds of it, thank goodness, with only a small hike in their percentage-based fees!) If you don't repair this aircraft
and fly it again, guess what will probably happen! Glug, glug, glug!
Two other last things - for 'minor problems' like this which are not an immediate emergency (bearing in mind that you still have another
tank of fuel, and quite possibly, a centre tank too), you will not always be told by the F/O! It's down to YOU to notice the fault,
and take action (though it IS possible to set FSP up so that it warns you in the onscreen Mini-Report, but then you get less points for a
successful resolution!) Luckily, in my case, the EICAS on the 737-700 showed a 'FUEL CONFIG' error, so I realised I had some sort of
problem (though I must confess I didn't quite know what had happened, at the time!)
I was also quite close to my destination airport when it happened, so I was not in any immediate danger of running out of fuel, so I did
NOT declare an emergency. I think possibly that if you had declared an emergency, you would have been penalised (unless, say,
BOTH or ALL THREE tanks were leaking!) - the reason I think that is because you didn't get penalised for NOT calling
an emergency.... usually, if FSP thinks you should have declared one, it will penalise you if you don't!
Hope this helps someone - I've gotta say, FSP is one great addon to FS... and the little 'problems' like this make it so scarily realistic, I
can't do without it now!
Regards
--
Neil
Re: Fuel flow - Ceemosp - 28-09-2006
I fully agree with you Neil.
I wish we had means to communicate with the controller other than declaring an emergency as you would surely agree that in real life
you would inform atc about the fact that you are loosing fuel so you are a) upped in their priority
and b) have the option to change your plans without big explanations (divert to nearest if neccessary). That would really a nice new option for a future version of FSP to allow
flexible response to different error levels.
Greetz Carsten
p.s. the red herring "may" happen if systems such as "fuel boost pumps" or similar equipment is actually functional in the AC's
configuration (payware often has complex fuel management options as you know) and actually FS9 can give you an error on any one of
those if they are assigned properly.....guess what I just experienced
