I was looking at the Lycoming Operator Manual and the Fuel Flow for the
180HP O-360A4 series engines page 3-50. The graph shows a major change in
slope between 75 & 80% then a return to the orginal slope of the line after
80%. 2 GPH between 75 and 80%. Thru the rest of the curve the slope is
about 1 GPH per 5%HP delta. Can anyone explain why?

Mike Dawson

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