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united757
Topic Author
Posts: 99
Joined: Fri Jul 21, 2006 11:53 am

### Fuel/Duration Calculation

Hello! I'm looking for a good program I can use to determine the duration of a flight and how much fuel will be required in FS 2004.
Anyone know of anything, or a feature in FS that does this that I don't know about?
Thanks!

QFA380
Posts: 2012
Joined: Fri Jul 22, 2005 4:38 pm

### RE: Fuel/Duration Calculation

I would also love to have something like this. It would be a greta help in filing flightplans and the like.

Also, one that cna be used on a number of different models of planes.

B737200
Posts: 211
Joined: Sun Feb 20, 2005 5:30 pm

### RE: Fuel/Duration Calculation

The flight planner in fs2004 gives you an estimated fuel burn in the flight log section, but from experience its innacurate. Adding an extra 50% of what it says used to work pretty well for me.

I usually try to find documentation from avsim.com or flightsim.com taken from real aircraft manuals to calculate fuel. this seems to work best in my opinion.

You can also try to find some freeware fuel planning programs on avsim.com for certain aircraft. There was one for a 737.

http://library.avsim.net/search.php?...+fuel+planner&CatID=root&Go=Search

I never tried it myself.

Hope this helps.

jetflyer
Posts: 603
Joined: Sat Aug 08, 2009 7:38 am

### RE: Fuel/Duration Calculation

Simple. Find out the average fuel flow of your aircraft per hour, work out the length of your flight, load the required fuel, then add an extra hour's fuel for reserve. Of course there's a bit more to it than that but you know what I mean.

Basically, fuel flows (avg) I use on FS are these:

727: 9,000lb/hr
737: 6,000lb/hr
747: 23-26,000lb/hr
757: 8,000lb/hr
767: 12,000lb/hr
777: 14,000lb/hr
A300: 12,000lb/hr
A310: 11,000lb/hr
A320: 6,000lb/hr
A330: 14,000lb/hr
A340-300: 15,000lb/hr
A340-5/600: 20,000lb/hr
DC-9: 6,000lb/hr
MD-80: 7,000lb/hr
DC-10-30: 18/20,000lb/hr

Hope that helps a bit... saw me through 2,300hrs on FS with good fuel planning..

747luvr
Posts: 331
Joined: Thu Jul 21, 2005 1:39 am

### RE: Fuel/Duration Calculation

While in midflight, esp on longhauls flights, heres what i do to fig out if I'll have enough fuel for the remainder of my flight.

Pull up your clock and start it for one minute-to the second. (ie-8:44:07 and stop it at 8:45:07)Giving you 60 seconds.
Write down how many lbs of fuel is left in the tanks.

You will see how many lbs of fuel burnt in the 60 seconds.

Jot down your FF per hour, mileage to destination and fuel left in weight., BEFORE & AFTER.

#'s are examples: 7,900 lb/hr (times 4, for a 747=31,600lbs/hour or 526.6 lbs of fuel per minute)

8 miles traveled in 60 seconds, and 4680 miles to go till destination /by 8miles per minute=585 minutes.

287,900 lbs of fuel in the tanks. OK, stay with me. Divide 287,900 by 526.6 min's=547 minutes. Guess what? I need at least 585 minutes of fuel so I'm short by 38 minutes. But, I have plenty of time to throttle back and use less fuel and I'll make my destination without "cheating" to add fuel.

I hope this wasnt TOO complicated.

jamesbuk
Posts: 3712
Joined: Mon May 02, 2005 11:52 pm

### RE: Fuel/Duration Calculation

Yeh thats all nice and jolly if you in the air and you've got plenty left, but what if your going to be well out, thats why we need a ground one
Nice method though!! works pretty neatly.

Rgds --James--
You cant have your cake and eat it... What the hells the point in having it then!!!

jumpseatflyer
Posts: 155
Joined: Fri Sep 23, 2005 12:13 pm

### RE: Fuel/Duration Calculation

If the quoted requirement is less than 100,000 pounds, double. If more, multiply by 1.5. Has always worked for me, but a lot of times the reserves get used. I also don't fly very long legs. 1500nm is generally my maximum length.

jamesbuk
Posts: 3712
Joined: Mon May 02, 2005 11:52 pm

### RE: Fuel/Duration Calculation

 Quoting Jumpseatflyer (Reply 6):If the quoted requirement is less than 100,000 pounds, double. If more, multiply by 1.5. Has always worked for me, but a lot of times the reserves get used. I also don't fly very long legs. 1500nm is generally my maximum length.

But what about more fuel efficient aircraft? or is it just a general thing your using there? also what altitude is that based at?

Rgds --James--
You cant have your cake and eat it... What the hells the point in having it then!!!

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