A question regarding fuel / engine efficiency

[TempestII 262]

Hello all,

Sorry if this has been asked before (I did do a search before I posted this but came up short).

Are there any lines in the DATA INI that control an engine's fuel consumption? And if so, do they affect the engine's performance in regards to thrust?

The lines I've put in bold are what I'd assume affect fuel consumption but I'm not sure if they actually do or what I'm meant to do to them to make an aircraft more or less fuel efficient.

 

[Engine1]
ReferenceName=Pratt & Whitney F-119-PW-100
SystemType=JET_ENGINE
InputName=THROTTLE_CONTROL
EngineID=1
HasAfterburner=TRUE
NumAfterburnerStages=4
SLThrustDry=125470.00
SLThrustWet=175100.00
ThrustAngles= 0.0,0.0,0.0
ThrustPosition=-4.47,-10.231,0.0
ThrottleRate=0.8
NozzleAnimationID=10
ReverseAnimation=TRUE
IdleThrottle=0.10
IdleRPM=0.28
IdleNozzle=0.0
CruiseThrottle=0.37
CruiseRPM=0.82
CruiseNozzle=1.0
MilThrottle=0.65
MilRPM=1.00
MilNozzle=1.0
MaxThrottle=0.9
MaxRPM=1.00
MaxNozzle=1.0
FullABThrottle=1.12
FullABRPM=1.00
FullABNozzle=0.0
AltitudeTableNumData=10
AltitudeTableDeltaX=3048.0
AltitudeTableStartX=0.0
AltitudeTableData=1,0.971106394,0.942855852,0.915238387,0.888244103,0.861863187,0.836085916,0.81090265,0.786303837,0.762280013,0.738821797,0.715919894,0.693565098,0.671748283,0.650460414,0.629692538,0.609435786,0.589681377,0.570420613,0.55164488,0.533345649,0.515514475,0.498142997,0.481222939,0.464746105,0.448704388,0.433089758,0.417894274,0.403110075,0.388729381,0.374744499,0.361147815,0.347931799,0.335089002,0.322612056,0.310493678,0.298726662,0.285193242,0.27240596,0.26022405,0.248620308,0.237562406,0.226989891,0.216908987,0.207331873,0.198193216,0.18941235,0.181041534,0.173024394,0.165388417,0.157978038,0.150909904,0.143808453,0.137043248,0.131316926,0.125837043,0.120517912,0.115176317,0.110071472,0.105192884,0.100530525,0.096074811,0.091816584,0.087747089,0.083857963,0.08014121,0.076589191,0.073194605,0.069950474,0.066850129,0.063887197,0.061055589,0.058349483,0.055763318,0.053291776,0.050929778,0.048672468,0.046515207,0.04445356,0.042483289,0.040600345,0.038800856,0.037081125,0.035437615,0.033866949,0.032365898,0.030931377,0.029560436,0.028250259,0.026998151,0.025801539
DryMachTableNumData=5
DryMachTableDeltaX=0.4
DryMachTableStartX=0.0
DryMachTableData=1.000,0.942,1.106,1.240,0.000
WetMachTableNumData=7
WetMachTableDeltaX=0.4
WetMachTableStartX=0.0
WetMachTableData=1.000,0.991,1.295,1.683,2.473,2.975,3.627
MaxInletTemperature=300
GyroscopicInertia=
TSFCM0=0.743  
TSFCM1=1.160
AfterburnerTSFC=1.970
MinFuelFlow=0.02
ExhaustEmitterName=HarrierEngineEmitter
ExhaustPosition=-4.47,-10.431,-1.555
AfterburnerEffectSize=1.00
AfterburnerNodeName=afterburner
AfterburnerEmitterName=F22A_burnerEmitter
MinExtentPosition=-1.13,-3.68,-1.02
MaxExtentPosition=-0.14, 1.36,-0.04
FireSuppression=TRUE 

 

Thanks in advance!

[+guuruu 5,580]

17 minutes ago, TempestII said:

Are there any lines in the DATA INI that control an engine's fuel consumption?

Yes

17 minutes ago, TempestII said:

TSFCM0=0.743  
TSFCM1=1.160

Not sure but it's probably fuel comnsuption at min and max rpm without afterburner.

and

AfterburnerTSFC=1.970

 

17 minutes ago, TempestII said:

And if so, do they affect the engine's performance in regards to thrust?

No, if you think rpm is too low for speed, you must do something with aeroplane drag.

Edited September 11, 2018 by guuruu

[TempestII 262]

22 minutes ago, guuruu said:

Yes

Not sure but it's probably fuel comnsuption at min and max rpm without afterburner.

and

AfterburnerTSFC=1.970

 

No, if you think rpm is too low for speed, you must do something with aeroplane drag.

OK, cheers mate, I'll have a play around with those figures.