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I have been plotting a Willans line, (engine power against fuel mass flow rate) and I noticed that the line is fairly linear up to about 75% and then it starts to increase a bit more dramatically.

- So I was wondering how does engine power at a fixed RPM effect fuel mass flow rate?
- Is it directly proportional or is it squared? And how would you prove this?
- Is there an equation that you can use that shows how the two affect each other?

Any Help is much appreciated.

Cheers

Alex

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# Diesel Engine Friction

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