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## Flight fuel = fuel flow x ETI vs Flight Fuel = Total distance x gal per mile

• hews16
• Topic Author

### hews16 created the topic: Flight fuel = fuel flow x ETI vs Flight Fuel = Total distance x gal per mile

Hello everyone,

Would anyone be able to tell me under what circumstances you would used the formula Flight Fuel = Total Distance x Gal or KG / mile to find the flight fuel required? Page 105 of the book.

Most of the methods to date I've used for find flight fuel is simply * flow rate / 60min x number of minutes of ETI. Which formula do we apply in PNR calculations?

Thanks

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• John.Heddles
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• ATPL/consulting aero engineer
• Posts: 669
• Thank you received: 70

### John.Heddles replied the topic: Flight fuel = fuel flow x ETI vs Flight Fuel = Total distance x gal per mile

If you really want to remember formulae (when it is just as easy to figure the relationship out when you need it), you use the form appropriate to whatever data you have ergo, if you know quantity "a", then you use a form in which "a" figures.

It really is as simple as that ..

Engineering specialist in aircraft performance and weight control.

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