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Deans Web Site
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Date: 9-20-2009
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Number of Hours: 0.75
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Manual Reference:
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Brief Description: Lift Reserve Indicator probe
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Do you have one of these little devices on the wing of your plane? It is the lift reserve indicator pressure ports. Here is what the book says about lift reserve indicator (LRI).
The Lift Reserve Indicator provides constant reference to a base line datum, zero lift, which is established during calibration. The result is safety and control, critical during slow speed flight and during maneuvers at any speed where lift approaches zero. The LRI eliminates guesswork and calculations and is reliable under all conditions of weight, center of gravity, flap position, density altitude, turbulence and angle of bank.
The LRI consists of a rectangular, aerodynamically shaped airstream probe and a display gauge. The probe is mounted so that it is positioned in relatively undisturbed air and is effective on all types of General Aviation aircraft including singles, twins, float planes, pushers, ragwings and homebuilts. There are two air pressure ports, each on separate faces of the probe, which are piped to the instrument display. The differential pressure between the two ports yields lift reserve readouts.
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Lift Reserve Indicator Probe
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