Simviation Forum - FS 2002 Fuel Consumption (TSFC)..

Sep 19^th, 2003 at 10:35am

f-16 Offline
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Does anyone know if, in FS2002, there is a way to adjust the fuel consumption in jet aircraft in either the AIR or CONFIG files? I have AIREdit, but can not find the variable that changes the fuel consumption (TSFC), and the variable is not available in FDE. Cry

??? ???

« Last Edit: Sep 20^th, 2003 at 9:15pm by f-16 »

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Reply #1 - Sep 19^th, 2003 at 11:59am

ozzy72 Offline
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I'm a prop engine tweaker myself, but you should find something like;

[GeneralEngineData]
fuel_flow_scalar = 1

In the aircraft.cfg file. Change the number, the smaller the number the more efficient the engine I would guess.
Although you can never tell with M$ Grin

Ozzy

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Reply #2 - Sep 19^th, 2003 at 12:29pm

f-16 Offline
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[GeneralEngineData]
fuel_flow_scalar = 1

In the aircraft.cfg file. Change the number, the smaller the number the more efficient the engine I would guess.

Can anyone confirm what Ozzy said? I want to make SURE before I go and mess around with these values

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Reply #3 - Sep 19^th, 2003 at 2:40pm

ozzy72 Offline
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f-16, I've just run a quick test. The jets work the same way as piston engines (inspite of my paranoia). So reducing the number will increase the range. Try 0.8 for a start.

Ozzy Wink

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Reply #4 - Sep 19^th, 2003 at 2:53pm

f-16 Offline
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Thanks ozzy.. I'll give .8 for starters and then reduce it gradualy to see what happens..
I'll let you know if I have any problems...

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Reply #5 - Sep 20^th, 2003 at 3:17am

microlight Offline
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I can confirm that altering this value does change the efficiency, but not the performance. If you use a value of 1, then you can get realistic ranges, but decrease the number to increase the range. Dropping it to 0.5 will double the range etc.

Good for round-the-world trips without landing!!
Grin

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Reply #6 - Sep 20^th, 2003 at 9:41am

f-16 Offline
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If I adjust the TSFC value in my AIR file lower than 400 (on mine) does this also affect the fuel burn/range?

Which does a better job at regulating the range. TSFC or the fuel flow scalar?

Adjusting the TSFC does a good job. That was the first adjustment I made.

« Last Edit: Sep 20^th, 2003 at 11:45am by f-16 »

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Reply #7 - Sep 20^th, 2003 at 3:15pm

microlight Offline
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I think that the .cfg file fine tunes what the .air file sets as the basic plane operating parameters. So I suppose you could do it either way, but from what others have said, the .cfg file in FS2k2 rules.

Whatever works for you!

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Reply #8 - Sep 21^st, 2003 at 11:11am

f-16 Offline
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Quote:

I think that the .cfg file fine tunes what the .air file sets as the basic plane operating parameters. So I suppose you could do it either way, but from what others have said, the .cfg file in FS2k2 rules.

Whatever works for you!

Can anyone please confirm what microlight said above. Is this true? How can the CFG file "adjust" the AIR file? Shocked

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Reply #9 - Sep 22^nd, 2003 at 2:46am

BFMF Offline
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Quote:

Can anyone please confirm what microlight said above. Is this true? How can the CFG file "adjust" the AIR file? Shocked

I don't think that's the case. I believe it's been demonstrated that the cfg file takes priority over the air file.

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Reply #10 - Sep 22^nd, 2003 at 4:44am

microlight Offline
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I understand that the .air file was the prime source of info in FS2000, but that in 2002, the bulk of the settings were transferred to the .cfg file.

So why have an .air file? Well, where the .air file is still necessary is for things like braking strength, where the setting has not been transferred to the .cfg file.

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Reply #11 - Sep 22^nd, 2003 at 11:12am

f-16 Offline
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Hmmmm... Is that why I can't adjust the fuel tank capacity in the AIR file, but I can in the CFG? Changing the one in the AIR file does not change the capaity reading in the fuel menu.. I thought I did something wrong.. Cry

??? ???

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Reply #12 - Sep 23^rd, 2003 at 11:06am

IanK Offline
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It will depend on which editor you use.
If you use FDE it will use .cfg as a script to get into your way. If you use a 3rd party editor such as AirEd or AAM they will co-operate with you better.

Then you can ignore .cfg unless the variable does not exist at all in the .air file.

FDE - just say no!

Ian

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