PFPX fuel planner

[Driver170 6]

Had a major problem with the built in fuel planner i ran a flight from edinburgh to gatwick with the 737 NGX short flight and i almost ran out of fuel had about 1000kg to spare do i have to add more fuel in the fuel options? I thought it done it all for you?

[Pierre95 14]

Hello use aircraft bias to correct fuel burn...

Pierre

[Driver170 6]

Jeeso scared to touch the keyboard !!! Where do i get the 737 800 info from for it?

[Akorn 7]

Scared to read the manual!!!? Test flight.

[Driver170 6]

Don't know what am touching will do! Does anyone have a template of these figures kicking about mate?

[Raimo 3]

<PFPX_AIRCRAFT>
<Registration>PMDG 800 NGX</Registration>
<PerformanceFile>Boeing 737-800ERW CFM56-7B26-7B27.txt</PerformanceFile>
<WeightUnits>KG</WeightUnits>
<DistUnits>FT</DistUnits>
<AltitudeUnits>FT</AltitudeUnits>
<ThresholdTime>60</ThresholdTime>
<ThresholdDist>400</ThresholdDist>
<TakeOffAltnDist>397</TakeOffAltnDist>
<DOW>41413</DOW>
<MZFW>61711</MZFW>
<MRW>79606</MRW>
<MTOW>79242</MTOW>
<MLW>66361</MLW>
<PaxCap>160</PaxCap>
<CargoCap>20298</CargoCap>
<LastStep>250</LastStep>
<BiasClimb>1</BiasClimb>
<BiasCruise>1</BiasCruise>
<BiasDescent>1</BiasDescent>
<BiasDrag>1.002</BiasDrag>
<StdClimbMode>1</StdClimbMode>
<StdCruiseMode>103000</StdCruiseMode>
<AltnCruiseMode>103000</AltnCruiseMode>
<AltnDescentMode>1</AltnDescentMode>
<AutoAltnMinLdgRunwayLengthFeet>5420.000</AutoAltnMinLdgRunwayLengthFeet>
<AutoAltnCeilingFeet>500.000</AutoAltnCeilingFeet>
<AutoAltnVisibility>500</AutoAltnVisibility>
<AutoAltnAirportType>2</AutoAltnAirportType>
<FuelCapacity>20891</FuelCapacity>
<TaxiFuelPerMinute>12</TaxiFuelPerMinute>
<APUBurnPerHour>105</APUBurnPerHour>
<EngineAI>0.030</EngineAI>
<TotalAI>0.050</TotalAI>
<WakeCat>M</WakeCat>
<SSR>SB1D1</SSR>
<Equipment>SDE1E3FGHIRWXYZ</Equipment>
<FAACode>L</FAACode>
<NAV>RNVD1E2A1</NAV>
<ORGN>EGLLBAWH</ORGN>
<RMK>LAHSO NOT AUTHORISED</RMK>
<OPR>BAW</OPR>
<RVR>75</RVR>
<PBN>A1B3B4B5D3D4S1</PBN>
<SUR>TCAS</SUR>
<PER>B</PER>
<CODE>400562</CODE>
<TOPCATFile>B737-800_GE.acft</TOPCATFile>
<TOPCATName>B737-800 CFM56-7B26</TOPCATName>
<TOPCATAssumed>1</TOPCATAssumed>
<TOPCATDerated>1</TOPCATDerated>
<TOPCATCombine>1</TOPCATCombine>
<CONFIGURATIONS>
<CONFIG>
<Code>Standard</Code>
<Remarks>Standard configuration</Remarks>
<IsStandard>1</IsStandard>
</CONFIG>
</CONFIGURATIONS>
<EROPS>
<Scenario>
<ScenarioName>ETOPS 90</ScenarioName>
<MaxDivTime>90</MaxDivTime>
<MaxDivDist>566</MaxDivDist>
<AssumedWeight>73000</AssumedWeight>
<APUOnInEROPSSegment>No</APUOnInEROPSSegment>
<Case1Name>ONE ENGINE OUT</Case1Name>
<Case1DescentMode>3</Case1DescentMode>
<Case1Alt>-1</Case1Alt>
<Case1CruiseMode>29</Case1CruiseMode>
<Case1APU>Yes</Case1APU>
<Case2Name>ONE ENGINE OUT DECOMP</Case2Name>
<Case2DescentMode>4</Case2DescentMode>
<Case2Alt>10000</Case2Alt>
<Case2CruiseMode>29</Case2CruiseMode>
<Case2APU>Yes</Case2APU>
<Case3Name>ALL ENGINE DECOMP</Case3Name>
<Case3DescentMode>2</Case3DescentMode>
<Case3Alt>10000</Case3Alt>
<Case3CruiseMode>2</Case3CruiseMode>
<Case3APU>No</Case3APU>
</Scenario>
<Scenario>
<ScenarioName>ETOPS 120</ScenarioName>
<MaxDivTime>120</MaxDivTime>
<MaxDivDist>766</MaxDivDist>
<AssumedWeight>72000</AssumedWeight>
<APUOnInEROPSSegment>No</APUOnInEROPSSegment>
<Case1Name>ONE ENGINE OUT</Case1Name>
<Case1DescentMode>3</Case1DescentMode>
<Case1Alt>-1</Case1Alt>
<Case1CruiseMode>29</Case1CruiseMode>
<Case1APU>Yes</Case1APU>
<Case2Name>ONE ENGINE OUT DECOMP</Case2Name>
<Case2DescentMode>4</Case2DescentMode>
<Case2Alt>10000</Case2Alt>
<Case2CruiseMode>29</Case2CruiseMode>
<Case2APU>Yes</Case2APU>
<Case3Name>ALL ENGINE DECOMP</Case3Name>
<Case3DescentMode>2</Case3DescentMode>
<Case3Alt>10000</Case3Alt>
<Case3CruiseMode>2</Case3CruiseMode>
<Case3APU>No</Case3APU>
</Scenario>
<Scenario>
<ScenarioName>ETOPS 180</ScenarioName>
<MaxDivTime>180</MaxDivTime>
<MaxDivDist>1184</MaxDivDist>
<AssumedWeight>68000</AssumedWeight>
<APUOnInEROPSSegment>No</APUOnInEROPSSegment>
<Case1Name>ONE ENGINE OUT</Case1Name>
<Case1DescentMode>3</Case1DescentMode>
<Case1Alt>-1</Case1Alt>
<Case1CruiseMode>29</Case1CruiseMode>
<Case1APU>Yes</Case1APU>
<Case2Name>ONE ENGINE OUT DECOMP</Case2Name>
<Case2DescentMode>4</Case2DescentMode>
<Case2Alt>10000</Case2Alt>
<Case2CruiseMode>29</Case2CruiseMode>
<Case2APU>Yes</Case2APU>
<Case3Name>ALL ENGINE DECOMP</Case3Name>
<Case3DescentMode>2</Case3DescentMode>
<Case3Alt>10000</Case3Alt>
<Case3CruiseMode>2</Case3CruiseMode>
<Case3APU>No</Case3APU>
</Scenario>
</EROPS>
</PFPX_AIRCRAFT>

I have one for NXG -800 winglet as its the only one I use. Modified it to match PMDGs configuration.

[B.Fatih KOZ 3]

For iFly 737 NG's , PFPX calculations are pretty accurate , if ;

- The loads are close to each other

- The weather at sim is close to the weather data PFPX used for calculations

So I assume NGX calculations will be nearly accurate too . Did you checked your plan and actual payload , did you updated the weather of your simulator to RW WX with built in WX or using an add-on like ActiveSky ?

Also the suggestions above for adjusting the bias is true , if after a (wx + payload) match between the operational flight plan and simulator you have to check your result , after then you may need to adjust your aircraft's fuel figures from PFPX.

Check PFPX Aircraft Database and use "Aircraft From Template" , then you will see the PMDG NGX templates , use them for creating a new aicraft . There you will see the bias values as %103 ( iFly values are %108) . You can then safely increase the value to for example %105 or %110 . But before editing your aircraft values go for a payload and weather match .

Safe flights

[Driver170 6]

raimo where will i put this?

B.faith koz i pretty much sussed it almost there thanks buddy