## Pilot's Handbook of Aeronautical Knowledge Aircraft Performance Performance Charts

Pilot's Handbook of Aeronautical Knowledge

Preface

Acknowledgements

Appendix

Glossary

Index

 Figure 10-27. Cruise power setting.
 Figure 10-26. Cruise and range performance. Cruise power setting tables are useful when planning cross-country flights. The table gives the correct cruise power settings, as well as the fuel .ow and airspeed performance numbers at that altitude and airspeed. Sample Problem 7 Pressure Altitude at Cruise................................6,000 feet OAT..................................................36 °F above standard Refer to Figure 10-27 for this sample problem. First, locate the pressure altitude of 6,000 feet on the far left side of the table. Follow that line across to the far right side of the table under the 20 °C (or 36 °F) column. At 6,000 feet, the rpm setting of 2,450 will maintain 65 percent continuous power at 21.0 "Hg with a fuel .ow rate of 11.5 gallons per hour and airspeed of 161 knots. Another type of cruise chart is a best power mixture range graph. This graph gives the best range based on power setting and altitude. Using Figure 10-28, find the range at 65 percent power with and without a reserve based on the provided conditions. Sample Problem 8 OAT.................................................................... Standard Pressure Altitude............................................... 5,000 feet First, move up the left side of the graph to 5,000 feet and standard temperature. Follow the line straight across the graph until it intersects the 65 percent line under both the reserve and no reserve categories. Draw a line straight down from both intersections to the bottom of the graph. At 65 percent power with a reserve, the range is approximately 522 miles. At 65 percent power with no reserve, the range should be 581 miles. The last cruise chart referenced is a cruise performance graph.

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