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"System Mass Integrating Time & Height" © (SMITH) where Performance = Control ©.
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Maximum Takeoff Weight: 1,670 Pounds.
Why is the line curvilinear? Shouldn't the line be straight? One overlooked parameter during climbout is the acquisition of progressively higher true airspeed. The effect of acceleration during climb is not physiologically perceptible. That is the utility of a graph! The curve represents an increase in velocity per unit of time (acceleration). Many pilots wonder how high density altitude accidents can claim high performance aircraft. Changes in true airspeed during takeoff and enroute climb are either underestimated or overlooked.
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How often do we really have sea level standard day conditions? Standard day at sea level is obviously 15 degrees celsius (59 degrees Fahrenheit). At 8,000 feet, standard day is -1.0C/30.2F. ISA plus 10C or ISA plus 20C are the domains for realistic density altitude predictions. Many pilots would call standard day performance "nominal" data. "Nominal" means a named category. Standard day performance represents a realistic starting point for reliable comparison.
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