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The Art of the Helicopter John Watkinson - Karatunov.net

The Art of the Helicopter John Watkinson - Karatunov.net

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<strong>Helicopter</strong> performance 329<br />

to skid height for fixed density altitude. Above about one rotor diameter <strong>the</strong> power<br />

becomes constant and <strong>the</strong> machine is considered to be out <strong>of</strong> ground effect (OGE).<br />

In <strong>the</strong> flight manual, a chart similar to that shown in Figure 8.4 may be given. This<br />

allows hover performance to be predicted for any combination <strong>of</strong> all-up weight (AUW)<br />

MAXIMUM ALTITUDE<br />

Fig. 8.4 Complex hover power chart allowing for AUW, density altitude and temperature. (Boeing)

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