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"System Mass Integrating Time & Height" © (SMITH) where Performance = Control ©.
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Maximum Takeoff Weight: 1,670 Pounds.
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Phoenix Goodyear (GYR). Goodyear, AZ.
Elevation: 959 Feet
Temperature: 13.4C/56.1F.
Pressure Altitude: 959 Feet
Density Altitude: 995 Feet.
The following conditions are the basis for data:
1) Flaps - - 10 DEGREES
2) Throttle - - FULL PRIOR TO BRAKE RELEASE
3) Runway - - PAVED, LEVEL, & DRY
4) Field ELEV > 3,000 Feet - - MIXTURE LEANED (see POH)
5) Wind - - ZERO
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Starting at zero, you used 792 feet to achieve liftoff velocity. After liftoff you displaced an additional distance of 727 feet (total distance 1,519 feet) to acquire 99 feet AGL. This represents an average 652 ft/min climb rate. We will continue to see a true airspeed increase with climb (progressively less dense air).
In order to achieve the manufacturer's prediction for climb performance, you must pitch up to the recommended climb IAS. If a departure procedure requires a minimum climb capability of 350 feet per nautical mile, can you achieve this? Of course you can! We know 350/0.065 = 5,384.6 feet. We observe 5,384.6 feet < 6,076 ft (one NM). In other words, you achieve 350 feet MSL prior to one nautical mile.
Instrument rated pilots often face climb restrictions. Interestingly, more power and higher true airspeed airplanes often invite ATC imposed climb restrictions. Ever higher density altitude true airspeeds will result in faster closure with other aircraft, terrain, weather phenomena, etc. True airspeed must be considered for every high density altitude takeoff, climb and enroute climb.
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