BadgerFaceWM
Topic Author
Posts: 4
Joined: Thu Jul 27, 2017 2:40 pm

Fuel Factor

Thu Sep 07, 2017 1:56 pm

Hello,
I noticed this morning on SimBrief an option for Fuel Factor. It gave options such as: P00,M01,M02 ....

I was wondering if anyone could tell me what this is and how airlines use it?

Thanks in Advance.
 
BravoOne
Posts: 2157
Joined: Fri Apr 12, 2013 2:27 pm

Re: Fuel Factor

Thu Sep 07, 2017 4:12 pm

I have never heard of this and don't see there term anywhere in JetPlan. Sounds like a variation of Cost Index but otherwise I remain clueless. Also, not familiar with Sim Brief, What kind of program is that?
 
badgervor
Posts: 131
Joined: Sun Apr 13, 2014 10:58 pm

Re: Fuel Factor

Thu Sep 07, 2017 4:24 pm

https://www.simbrief.com/home/

It is a virtual flight planner for flight simulating. I use it as well and have always left the fuel factor at P0 (since I'm not sure what it does). Anyway, the fuel load it gives me, for the pmdg 737 has always been good. I'll fuel up with what the release gives me and so far haven't had any emergency fuel situations.
 
Woodreau
Posts: 1399
Joined: Mon Sep 24, 2001 6:44 am

Re: Fuel Factor

Thu Sep 07, 2017 8:07 pm

As planes get older they tend to burn a little bit more fuel compared to when they were first delivered caused by many different factors - older less efficient engines, drag caused by a missing door panel or fairing and so forth. lots of different reasons.

The factor adjusts the FMS fuel burn prediction for that specific aircraft compared to a new aircraft. It's listed on the dispatch release and you just ensure during FMS INIT that the PRF FACTOR on the PERF INIT page matches what's listed on the release as each aircraft has its factor already pre-populated in the FMS from its performance database. I haven't seen it not match (yet). But in the event it doesn't it's not a big deal. If it's not entered, it just means your actual fuel and FMS calculated fuel burn will be different..

Edit:

http://www.smartcockpit.com/docs/Gettin ... toring.pdf
Bonus animus sit, ab experientia. Quod salvatum fuerit de malis usu venit judicium.
 
BravoOne
Posts: 2157
Joined: Fri Apr 12, 2013 2:27 pm

Re: Fuel Factor

Thu Sep 07, 2017 10:15 pm

I know that. Just have seen it expressed that was.
 
User avatar
LAXintl
Posts: 21665
Joined: Wed May 24, 2000 12:12 pm

Re: Fuel Factor

Fri Sep 08, 2017 12:42 am

Different terms are used across industry such as Burn Bias, Performance Factor, Burn Factor, etc, all to indicate degradation of performance away from book values.
From the desert to the sea, to all of Southern California
 
BadgerFaceWM
Topic Author
Posts: 4
Joined: Thu Jul 27, 2017 2:40 pm

Re: Fuel Factor

Fri Sep 08, 2017 8:19 am

Woodreau wrote:
As planes get older they tend to burn a little bit more fuel compared to when they were first delivered caused by many different factors - older less efficient engines, drag caused by a missing door panel or fairing and so forth. lots of different reasons.

The factor adjusts the FMS fuel burn prediction for that specific aircraft compared to a new aircraft. It's listed on the dispatch release and you just ensure during FMS INIT that the PRF FACTOR on the PERF INIT page matches what's listed on the release as each aircraft has its factor already pre-populated in the FMS from its performance database. I haven't seen it not match (yet). But in the event it doesn't it's not a big deal. If it's not entered, it just means your actual fuel and FMS calculated fuel burn will be different..

Edit:

http://www.smartcockpit.com/docs/Gettin ... toring.pdf


Thank you.

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