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YukonPete

PFPX profile seems spot on!

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Just completed a 9.5 hour flight from Melbourne YMML to Honolulu PHNL in a Qantas 747-400 RR model. The default PFPX profile and flight plan was extremely accurate.

PFPX calculation had a flying time of 09:29 and 102.3 ( KG ) of Fuel burn.  

My actual fight was 09.39 and 102.6 fuel burn

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I've struggled with this for months.  My experience is that my fuel burn, given reliable winds, can vary +/- 6% but usually falls within 3%.

Note that the default PFPX profiles do not include the -400ER which has different engines that other variants; however, these can be found in their downloads forum.

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