On Wed, 18 Feb 2004 19:09:35 GMT, "Bob Gardner"
wrote:

Using a 172P POH as an example, at 8000 feet density altitude and 75
percent, the range is eyeballed as 575 nm; at 65 percent it is 640; at 55
percent it is 680, all based on 50 gallons available with reserve. With 62
gallons available (with reserve), the numbers a 75 percent 755 nm, at 65
percent 820, and at 55 percent 870. Sure looks to me as though reducing the
power setting increases range, as does carrying more fuel.

Bob Gardner


I suppose the lesson here is that compensating factors for SOME
aircraft can negate the theoretical advantages for different settings.

The engine in my case was leaned to peak rpm in both cases.

for the guy who asked the original question. doing your research
certainly pays.

Stealth Pilot
Australia.