Alpha Indicator

 

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Displays vehicle angle of attack, defined as the angle between the vehicle plus X axis and the wind-relative velocity vector (negative wind vector). ALPHA is displayed by a combination moving scale and moving pointer. For angles between -4° and +28°, the scale remains stationary, and the pointer moves to the correct reading. For angles less than -4° or greater than +28°, the pointer stops (at -4 or +28°), and the scale moves so that the correct reading is adjacent to the pointer. The ALPHA tape ranges from -18° to +60° with no scale changes. The negative scale numbers (below zero) have no minus signs; the actual tape has black markings on a white background on the negative side, and white markings on a black background on the positive side.
General

Non-normal Procedures

Normal Procedures

Limitations

Schematic

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