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Question about fuel burn in long approaches


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Hypothetically, the route is OERR-GCLP. The STAR is RUSIK1K which ends at LALTO.

 

The approach is going to be GCLP ILS Z Rwy 03L, which involves a 12 mile leg from LALTO to intercept the 10 DME arc from LPC to the final approach course.

 

My question has to do with fuel planning for the approach. The stretch from the origin (OERR) via RUSIK1K to LALTO is fine, but PFPX plans a direct leg from LALTO to the airport, whereas the approach takes a non-direct route because of the DME arc. This increases the fuel burn, especially if ATC ends up asking for the arc to be flown at a constant altitude. 

 

Therefore, what is the typical and preferred way to account for extra fuel burn in the approach itself? Would you add this to contingency? Or to "Approach Time" on the Aircraft editor? Or somewhere else?

 

Thanks.

 

 

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For the example if we use the route editor summary page PFPX has legs from LATLO giving a total @27nm

 

From the approach chart the total leg distance via the arc is @37nm

 

You could enter the 10nm difference as a circuit in distance on the route section of the planner.

 

Additionally you could enter an average or maximum circuit in distance for the various approaches in the airport editor for automatic application on any arrival.

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  • 2 months later...
Am 3.12.2022 um 18:39 schrieb srcooke:

You could enter the 10nm difference as a circuit in distance on the route section of the planner.

 

Additionally you could enter an average or maximum circuit in distance for the various approaches in the airport editor for automatic application on any arrival.

Unfortunate with PFPX v2.04 'Circuit In' in the Airport Editor has no effect. Entering a number in 'Circuit Out' the Routeplanner wil use this same value as Circuit Out or Circuit In respectively.

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27 minutes ago, Mr.Eurocup said:

Unfortunate with PFPX v2.04 'Circuit In' in the Airport Editor has no effect. Entering a number in 'Circuit Out' the Routeplanner wil use this same value as Circuit Out or Circuit In respectively.

 

I prefer to use v2.03

 

As a test I have assigned a circuit out at Barcelona and circuit in at Casablanca as depicted, you an see the circuit distances are loaded from the edited airport files.

 

The difference in distance is as expected when compared to no entry:

 

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ok I have Installed v2.03 from scratch and the problem is still there. Entering 10nm in the Airport Data 'Circuit Out' at GMMN the Routeplanner use it as 'Circuit In'

 

 

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It appears to be related to when STAR's are in use as without them the circuit in remains correct.

 

As the distance is initially correct before computing the flight it is likely a bug.

 

 

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