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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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Density altitude is pressure altitude corrected for a non standard temperature.
NTSB Probable Cause. True airspeed is corrected for calibration errors as well as non-standard temperature & pressure. Since "ratio" level graphics are sensitive to time; distance, velocity & acceleration rates are explainable. The pilot-in-command is able to predict the effect of the environmental situation with a high degree of control (go/or no-go).
Here, you should contemplate speed [takeoff velocity (knots true airspeed)] & ground roll distance as a function of acceleration rate because runway lengths are often limited. Since some high density altitude airports have rising terrain, trees, obstacles & buildings in close proximity; extra planning & vigilance are essential pilot duties.
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Childress Municipal (CDS). Childress, TX.
Elevation: 1,953 Feet
Temperature: 28.9C/84.0F
Pressure Altitude: 1,960 Feet
Density Altitude: 3,991 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 958 feet to achieve liftoff velocity. After liftoff you displaced an additional distance of 561 feet (total distance 1,519 feet) to acquire 79 feet AGL. This represents an average 527 ft/min climb rate. Remember, for flight under IFR, there is an expectation of a minimum climb rate of 500 ft/min. If a 300 feet per nautical mile climb restriction were imposed, the data suggests conservatism on your part. We are seeing a close call (300 is close to 315). The data says you can, but pilots look for safety factors, not beating the odds.
Visual Meteorological Conditions should exist, but there is something you can control. The airlines plan FAR Part 91 ferry flights routinely. Send your friend, family member, or colleague in a one way rent-a-car to a "nearest suitable airport" where conditions are better (lower density altitude). Reduce your fuel load and passenger load to reduce weight and improve climb performance. You will be respected for your judgment, concern, and professionalism.
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