The performance specifications for a Cessna 172 N with 40 gallons usable fuel indicate at 75% Power at 8,000 feet the range is 485 NM and 4.1 hours with a 45 minute reserve.
Then it indicates Maximum Range at 10,000 feet with 40 gallons usable fuel is 575 NM and 5.7 hours with a 45 minute reserve.
That's a significant difference between 75% power and maximum range numbers: 90 NM and 1.6 hours more. I understand fuel consumption would be less at 10,000 feet and I understand how to obtain 75% power, but what I don't understand is how would I acheive Maximum Range? What is Maximum range? What power setting would I use?
Thank you
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