Calculating fuel

[NZ255]

Not sure weather this has been asked before, but does anyone know how to calculate fuel for a specific flight, or a tool that does it for you.

Thanks

Nick

[benwynn]

Find out how many Kgs per hour the aircraft burns then go from there. Search on Google..

[NZ255]

QUOTE (benwynn @ Dec 23 2007, 11:09 PM) <{POST_SNAPBACK}>

Find out how many Kgs per hour the aircraft burns then go from there. Search on Google..

Ok what about reserves, how many hours extra? 1 hour?


Thanks for quick reply

[NZ255]

Does 6,000kgs/hour sound about right for b767? Only article I could find.


Nick

[Alex]

For the reserves, I believe it is enough to reach your alternate, plus 30mins (or 1 hour?) extra.

Alex

[Charl]

Well assuming you have a flight plan:



you'd select your aircraft, click on "Nav Log" and get some flight details:



This one is for an A380.
A SIA 260 would tend to use a little less fuel, but may need a stop or two:



You might repeat the exercise for your divert airport, plus 30 min reserve.
Quick calc for the Airbus above shows 6,000gph so add 3,000gals.

[benwynn]

Sorry Charl, but you cant trust the FS9 Fuel Planner..

Yes, It depends on your alternate. I normally carry around 1 hour extra fuel..

[Alex]

I usually just chuck in what seems a good amount, I usually just fly regional routes so it's not so much of a biggie for me. For example, in the Beech I just chuck in 35-40%.

Alex

[Charl]

QUOTE (benwynn @ Dec 19 2007, 01:15 PM) <{POST_SNAPBACK}>

Sorry Charl, but you cant trust the FS9 Fuel Planner..
Yes, It depends on your alternate. I normally carry around 1 hour extra fuel..

Yes I'd heard it wasn't too reliable, but hey, it's a flightsim:
<Pause>
<alt>/A/F
Top up tank
<Unpause>
Land as if nothing happened, just make sure no-one was watching the middle bit...

[benwynn]

And there is payware out there for this aswell from Aerosoft Website

Flight Calculator

QUOTE

Aerosoft Flight Calculator does all the calculations you need during your flight planning and during your flight. All functions are logically grouped and easy to find.
TIME / SPEED / DISTANCE

* Calculate Speed
* Calculate Distance
* Calculate Time Enroute
* Calculate Fuel Endurance
* Calculate Fuel Flow
* Calculate Fuel Needed

ALTITUDE / AISRPEED

* Calculate Calibrated Airspeed
* Calculate True Airspeed
* Calculate Density Altitude
* Calculate Mach

WIND

* Calculate Wind Direction, Wind Speed
* Calculate Ground Speed and Heading
* Calculate Wind Correction, Cross Wind Component, Tail Wind Component
* Calculate Runway Crosswind
* Calculate Magnetic Variation

WEIGHT & BALANCE

* Calculate Center of Gravity
* Calculate Weight Shift
* Calculate Percentage Mean Cord

CONVERSIONS

* Volume: LTR, GAL, IPG
* Weight: KG, LB
* Weather: °C, °F, MB, HP, IHG, MHG
* Distance: MTR, YRD, KM, FT, IN, NM, SM

TIMER, STOPWATCH

* Local time / GMT time shown
* Calculate time enroute
* Calculate departure time
* Calculate arrival time
* Count up timer
* Count down timer

Runway / Descent

* Landing Runway Length Needed
* Takeoff Runway Length Needed
* Tailwind Landing Runway
* Descent Profile
* Descent Rate
* Begin Descent Point[/quote]

and for a good price for what it does thats if you really want to get into that sort of thing

QUOTE

Download-Version: (4.1 MB) EUR 12.95[/quote]

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[benwynn]

I do beleive simpilot magazine gave me a free copy of that software. But, I plan manually anyway

[Q300]

QUOTE (Alex @ Dec 19 2007, 01:21 PM) <{POST_SNAPBACK}>

I usually just chuck in what seems a good amount, I usually just fly regional routes so it's not so much of a biggie for me. For example, in the Beech I just chuck in 35-40%.

Alex

Yup same here, usaly makes it with about 15% spear

[Alex]

QUOTE (Q300 @ Dec 19 2007, 03:05 PM) <{POST_SNAPBACK}>

Yup same here, usaly makes it with about 15% spear

Hahaha yea, works well huh?

Alex

[benwynn]

Who Plans fuel in a B1900D anyway

[Alex]

Answer from a B1900D captain (RW) when asked about how much fuel they had on board: "Oh plenty, no worries about that!".

Alex

[AlisterC]

Or even better guys
Nick, search "FUEL" in the "FS2004 Utilities" category ONLY at avsim. You'll get a fuel planner for just about anything you want to fly.

[NZ255]

Thanks for you replies, I did download a fuel calculator for the 737NG for free, which looks all very fine, and am testing it out now on the ML - PH route.
So will see if it is accurate or not in about 4 hours

Nick

[AlisterC]

If you are using the PMDG, they have a fuel planner on their site for their 737 range and it works well
http://www.precisionmanuals.com/priv/pages/down/misc.html

[Charl]

It's somehow never been an issue in the sim for me, as I said I cheat if I messed it up.
I do remember some discussion way back about the accuracy of FS fuel calculations.
Does anyone know how inaccurate, and if it's consistently inaccurate or depends on distance or aircraft type?

[NZ255]

QUOTE (Albatross @ Dec 24 2007, 04:26 AM) <{POST_SNAPBACK}>

If you are using the PMDG, they have a fuel planner on their site for their 737 range and it works well
http://www.precisionmanuals.com/priv/pages/down/misc.html

Yes thanks for that link, already had D/L though.
I think it might have worked properly, if only I had have told it to compensate for 100 knot headwinds!?! (this is the info the FMC was giving me anyway) Is this correct? 90-100 knot headwinds the whole way and 10-15 knot crosswinds. BTW I had real world weather on (YMML-YPPH)

Nick