Hi Could someone explain in what units the fuel scalar is measured in? Ie what do I have to adjust it by to say increase fuel burn by 1%?Thanks

Hello,it is a dimensionless multiplier.If the default SFC is 0.5 h^11 gives 0.52 " 1.00.5 " 0.25 etcNB the default is 0.7 for Concorde.also afterburners are differentIan

>Ie what do I have to adjust it by to say increase fuel burn by 1%?

Douglas, Does the adjustment of these values only alter fuel burn, or are other engine parameters affected? I was told that increasing the fuel flow scalar would also increase thrust output, is this correct? Regards,Andrew[/font size]

Andrew,The aircraft.cfg file fuel flow scalar and its relationship to the corresponding airfile tables is a complex subject and goes far beyond simply scaling an existing fuel flow value up or down as a percentage of the original value. Ian has provided the correct info in his reply; I merely wanted to give Tomas the answer to his 1% question.The answer to your question is no, the fuel flow scalar doesn't affect thrust. It is related to specific fuel consumption for turbines. The fuel_flow_scalar=XX should be set above 1.0 for turbines, that equates to an SFC 0f 0.5. The formula is SFC=fuel_flow_scalar/2. Thus a fuel flow scalar set to 1.4 would yield an SFC of 0.7 and so on.For Recips, it adjusts fuel flow vs HP and I always leave it at 1.0 as that usually results in an SFC close to 0.46 at the optimum mixture setting after I have the power output set the way it should be.Ron Freimuth covers all this and much more in his excellent "Comments on aircraft.cfg". You can get it here:http://perso.wanadoo.fr/hsors/FS_Soft/fsdocs.htmlThere are power and thrust scalars in the aircraft.cfg file that will work to adjust HP and thrust output, or the airfile tables can be edited to accomplish a higher fidelity modeling of real aircraft engines. Information on how to accomplish this is available here:http://www.avhistory.org/scripts/MegaBBS/f...w.asp?forumid=5Just use the forum search function.:)