Is there an entry for FSX planes that determines that planes fuel usage per hour/minute? I see there is an entry for fuel scalar but what value is the scalar pulling from?Thanks in advance

If I understand your question correctly; a higher fuel scalar integer will result in a higher fuel burn per hour ratio. For example, some of the default planes (e.g. 737/CRJ) burn unrealistic amounts of fuel. If you reduce the CRJ fuel scalar from 1 to .81 you will see a more realistic FFPH. I believe the 737 should be set to .85.

From the .air file. Not all aircraft use it. On the Maddog it's section 1505."CN2 % vs. Fuel Flow ConstantIN (X): Normalized fuel flow constantOUT (Y): CN2 Where the constant is a normalized ratio of actual fuel flow parameter to static thrust.Ron Freimuth:FF (pph) = Thrust_Reference * F1505(CN2) * Delta_t/sqrt(Theta_t)"....It should all be perfectly clear now... :(

Edited February 17, 201214 yr by Paul J

@kingm56: No, I wasn't asking about the fuel scalar. I was just saying it is scaling something but where is that figure.@PaulJ: So it's in the .air file; however, it is not a single value all calculations are based off is what you are alluding to? I can't read .air files since I don't have whatever program is needed for that. So there isn't one easy to read value such as fph = 1,500 or something along those lines?What I want to accomplish is perform my calculations for fuel required. Don't get me wrong, I have plenty of resources to accomplish this already. I am merely seeking to further educate myself.

"I am merely seeking to further educate myself."OK - good site here:-http://www.grc.nasa.gov/WWW/K-12/airplane/sfc.html

I suppose I need to be more clear about what I am asking.

Is there an entry for FSX planes that determines that planes fuel usage per hour/minute?

I am not asking how do you calculate fuel flow. I am asking is there an entry in the .cfg or .air or another file where you can read the fuel flow per hour or minute for a particular plane in FSX. Put another way is there an entry FSX is using to figure the base amount of fuel a plane uses or does FSX simply assume all planes C152 to B747 are the same and use the fuel scalar to figure fuel flow. So a C152 in FSX with a scalar of 1.0 would use the same amount of fuel as a B747 with a scalar of 1.0? FSX must be using a base number from somewhere to perform it calculations on.

Edited February 17, 201214 yr by EdwardSm

So what FSX is doing is assuming 1.0 and using thrust rating of the engines? So a single engine with 1,500 pounds of thrust is using 1,500 pounds of fuel an hour the way FSX is thinking? Assuming 100% power is produced by those engines for one hour that is. In the example above the 1,500 pounds per hour would be further modified by the scalar. Assuming it was also set to 1 then the fuel usage would be 1,500 pph?Edit:Is it using the total fuel load divided by the time to reach max range divided by the total thrust? All of that is wrapped up in the .air file as I understand it. Is there a way to get that info from the .cfg file? Total fuel is there, Static thrust for jets (what about props), but what about time to reach max range? I really just need to get into the .air file it looks like.

Edited February 17, 201214 yr by EdwardSm