Simviation Forum - Fuel and payload harder to use in FS04

May 14^th, 2004 at 11:42pm

sethtriggs Offline
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Proud FS2002 owner since
May 2002
Buffalo, NY

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Posts: 122

I don't know if it's just me, but more of my aircraft become "overweight" with the full fuel settings (even with no payload!) than before in FS2002 - it's like a lot of my FS2002 aircraft won't work properly in FS2004. Anyone else having this sort of trouble? And is there a fix?

-Seth

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Reply #1 - May 15^th, 2004 at 1:35pm

Madcat Offline
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Montgomery AL

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I asked this before. The CG is way out on alot of planes as well. If U get yours fixed let me know. I will do a SS of it in a short.

Former crew chief of the largest aircraft in the free world.

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Reply #2 - May 15^th, 2004 at 2:06pm

Sterk Offline
Colonel

Posts: 316

It can be fixed by decreasing fuel tanks capacity in cfg file:

[fuel]
LeftMain = 0.0, -14.5, -1.0, 190.0, 0.0    //Longitudinal (feet), Lateral (feet), Vertical (feet), Usable(gallons), Unusable (gallons)
LeftAux = 0.0, -6.0, -1.5, 79.5, 0.0    //Longitudinal (feet), Lateral (feet), Vertical (feet), Usable(gallons), Unusable (gallons)
RightMain = 0.0, 14.5, -1.0, 190.0, 0.0    //Longitudinal (feet), Lateral (feet), Vertical (feet), Usable(gallons), Unusable (gallons)
RightAux = 0.0, 6.0, -1.5, 79.5, 0.0    //Longitudinal (feet), Lateral (feet), Vertical (feet), Usable(gallons), Unusable (gallons)
fuel_type = 2    //Fuel type: 1 = Avgas, 2 = JetA
number_of_tank_selectors = 1
electric_pump=1

But as far as I know it's a normal state of aircraft-they
never flies with full fuelload...

&&&&

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Reply #3 - May 15^th, 2004 at 2:45pm

Madcat Offline
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Montgomery AL

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Here is a SS and I did not touch anything. Plz take notice of the CG.

The CG should be where?? ??? I was told it the CG need to be as close to center as possible right? This one is not. My question to the aircraft makers is how do we correct this? If a plane had the CG in the nose can you imagine what it will look like trimmed to a 'level' flight? I have seen the with about a 5-10 degree pitch up 'level'.

Changing the weight and fuel in the cfg file will do what? That is the 'default' setting and you change it in the fuel and payload so I do not see how changing the cfg will help. I may be wrong but right now I do not see it.

Stock M$ 747-400....

Again notice the CG....

Former crew chief of the largest aircraft in the free world.

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Reply #4 - May 15^th, 2004 at 7:54pm

Sterk Offline
Colonel

Posts: 316

Okey,changing fuel tank capacity is really silly way to fix the problem...
Did you think about changing fuel tank position?Just moving tanks slightly back?

CG position as on your first picture is not always reason
for unstability of plane-I have many aircraft in may sim with such CG-and they fly perfectly...
IMHO-there are many parameters invoved here-such
as wing leading edge position and others...

&&&&

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Reply #5 - May 16^th, 2004 at 12:53am

Joe_D Offline
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"Takeoffs are optional,
landings are mandatory!"
NY state

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CofG should be about one third of the way back from the wing`s leading edge as in the second pic. This is a general rule of thumb of course and things like the shape of the wing have to be taken into account.

Home airports are KMGJ and KSWF in Orange County, NY&&Stop by and say hello.

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Reply #6 - May 16^th, 2004 at 3:25pm

sethtriggs Offline
Colonel
Proud FS2002 owner since
May 2002
Buffalo, NY

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Posts: 122

This does seem very puzzling! Heh... maybe there can be a proper patch for this problem later. (Related to this, it seems to be harder to climb in some jets too, and the pitch doesn't trim to a "nice" level at cruise - in other words the plane looks always looks like it's climbing). At maximum speed the planes still have a 5 degree nose up attitude. Heh...

-Seth

Visit the Buddies in Big Places webcomic! http://www.bibp.com

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Reply #7 - May 17^th, 2004 at 1:09pm

Sterk Offline
Colonel

Posts: 316

Again-there is no need to release a patch-all this can be fixed by editing several numbers in .cfg file-just open .cfg
fix proper numbers click save-you are all set...

&&&&

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Reply #8 - May 17^th, 2004 at 6:42pm

sethtriggs Offline
Colonel
Proud FS2002 owner since
May 2002
Buffalo, NY

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Posts: 122

Quote:

Again-there is no need to release a patch-all this can be fixed by editing several numbers in .cfg file-just open .cfg
fix proper numbers click save-you are all set...

The thing is, will those numbers work for each type of plane? I worry that by editing those there might be an issue with balance. I'm not exactly sure how to edit that, to tell you the truth...

The other problem is that this sort of thing is happening to new, FS2004-specific planes, which seems to indicate that there's a problem with a software development kit or other program used to produce the planes.

-Seth

Visit the Buddies in Big Places webcomic! http://www.bibp.com

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Reply #9 - May 18^th, 2004 at 6:18pm

Sterk Offline
Colonel

Posts: 316

Quote:

The thing is, will those numbers work for each type of plane? I worry that by editing those there might be an issue with balance. I'm not exactly sure how to edit that, to tell you the truth...

-Seth

Each plane,of course,has its own numbers.These numbers are actually physical characteristics of the plane
like geometry,size and weight parameters.In order to know what each number is responsible of you should
learn it from aircraft container sdk.Actually it's not so difficult as you think.In addition you always can create a
backup copy of the original cfg file and then feel free with experimentations with changing parameters in cfg file.

For example if your plane is hard for pitching and daznt want to take off-obviously it's nose is heavier than the rest of fuselage.It can be easily fixed by changing location of fuel tanks-just move them slightly back by changing apropriate coordinates:

[fuel]
LeftMain = 0.0, -14.5, -1.0, 190.0, 0.0 //Longitudinal (feet), Lateral (feet), Vertical (feet), Usable(gallons), Unusable (gallons)
LeftAux = 0.0, -6.0, -1.5, 79.5, 0.0 //Longitudinal (feet), Lateral (feet), Vertical (feet), Usable(gallons), Unusable (gallons)
RightMain = 0.0, 14.5, -1.0, 190.0, 0.0 //Longitudinal (feet), Lateral (feet), Vertical (feet), Usable(gallons), Unusable (gallons)
RightAux = 0.0, 6.0, -1.5, 79.5, 0.0 //Longitudinal (feet), Lateral (feet), Vertical (feet), Usable(gallons), Unusable (gallons)
fuel_type = 2 //Fuel type: 1 = Avgas, 2 = JetA
number_of_tank_selectors = 1
electric_pump=1

If you,for example, change bold numbers from 0,0
to,say,-3.0-(wich means fuel tanks are 3 feet back now)the back part of the aircraft will be much heavier and plane obviously will turn over back or will tend to pitch up much more...

Hope it helps...

&&&&

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Reply #10 - May 18^th, 2004 at 6:44pm

Billerator Offline
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EGLF is my home town
Farnborough, UK

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Posts: 428

Its not MS's fault, its the designer that inputs aircraft data.
The fact that the data required is not easy to come by, means that most aircraft do not fly like their real-world counterparts.

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