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"System Mass Integrating Time & Height" © (SMITH) where Performance = Control ©.
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True Zero Point: Ratio Data (Highest Level Measurement).
Velocity is reported via a Ratio Scale (for example, "0" KTAS @ time "0," & 18.93 KTAS @ nine seconds). This linear graphic is "de facto" functional because it "holds" a velocity that is a result of acceleration & time. For example, acceleration multiplied by time equals velocity; where a x t = v. Velocity is reported in ft/sec or m/s. Here, the units have been converted from ft/sec to knots true air speed (KTAS).
The color green is used to "notify" or ask you to take "note." Call it as you see it; you are the pilot-in-command. From a "system safety" perspective, this is your airplane under stated conditions. From a Crew Resource Management (CRM) perspective, it represents a system model of pilot and task. A certified flight instructor can place purposeful content under these performance curves.
You can ask yourself, "what would I do if,...?" under the stated time line. We have provided more information that will help you in your decision making and judgment. Our climb charts identify climb segments to further define your density altitude performance situation. Quality data has arrived!
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Phoenix Goodyear (GYR). Goodyear, AZ.
Elevation: 959 Feet
Temperature: 39.7C/103.46F.
Pressure Altitude: 1,000 Feet
Density Altitude: 4,000 Feet.
True Zero Point: Ratio Data (Highest Level Measurement). Notice only 255.6 feet is displaced at 12 seconds. At 25.675 seconds the takeoff distance is 1,170 feet. Our graph shows the dramatic effect of acceleration. Here, the curvilinear graphic is "de jure" functional because this particular shape accurately models the effect of density altitude to achieve takeoff velocity, and the ground roll that is predicted.
Excess thrust is required to accelerate an aircraft mass to takeoff velocity. We consume runway length in the process of acquiring takeoff velocity. Tables, charts, and graphs quickly present eight types of content (takeoff distance, density altitude, true airspeed, effective thrust, velocity, time, takeoff climb, and enroute climb) for pilot assessment.
Tables, charts, and graphs are data instruments designed for measurement. Any single item alone cannot explain a density altitude performance parameter. We unify multiple parameters to avoid errors of "omission." The takeoff distance chart represents the ultimate capture of critical content associated with density altitude performance.
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