Davtron’s Model 655 is a computer-based product that computes density altitude automatically. No longer does the pilot need to retrieve outside air temperature and pressure altitude, then enter this into a flight computer. The Model 655 measures outside air temperature, and accepts pressure altitude information from the blind encoder or encoding altimeter, then converts this information to a direct read-out of density altitude. The density altitude is computed using U.S. standard atmosphere tabulation. Take-off roll, maximum rate of climb, and fuel comsumption are all determined easily from density altitude and the aircraft’s flight manual.
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OUTSIDE AIR TEMPERATURE (°F)
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OUTSIDE AIR TEMPERATURE (°C)
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PRESSURE ALTITUDE
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DENSITY ALTITUDE
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AIRCRAFT VOLTAGE With ALARM
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ALTITUDE ALARM
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Weight: 5 oz.
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Warranty: 1 year
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Density altitude: – 10,000 to 30,000 ft.
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Pressure altitude: – 1,000 to 62,700 ft.
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(Depends on encoder range.)
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Flashing annunciator character on incorrect encoder inputs.
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Voltage range 10V to 32V ± .2 volts Typ.
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LED with automatic dimming.
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Input voltage: 14 or 28 volts.
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Input current: .35 amps max.