FAA-H-8083-15A - Chapter 04 Section I

FAA-H-8083-15A - Chapter 04 Section I - Chapter 4, Section...

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4-1 Introduction Attitude instrument fying is deFned as the control o± an aircra±t’s spatial position by using instruments rather than outside visual re±erences. Today’s aircra±t come equipped with analog and/or digital instruments. Analog instrument systems are mechanical and operate with numbers representing directly measurable quantities, such as a watch with a sweep second hand. In contrast, digital instrument systems are electronic and operate with numbers expressed in digits. Although more manu±acturers are providing aircra±t with digital instrumentation, analog instruments remain more prevalent. This section acquaints the pilot with the use o± analog fight instruments. Airplane Attitude Instrument Flying Chapter 4, Section I Using Analog Instrumentation
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4-2 30 W 24 Figure 4-1. Control Instruments. Any fight, regardless oF the aircraFt used or route fown, consists oF basic maneuvers. In visual fight, aircraFt attitude is controlled by using certain reFerence points on the aircraFt with relation to the natural horizon. In instrument fight, the aircraFt attitude is controlled by reFerence to the fight instruments. Proper interpretation oF the fight instruments provides essentially the same inFormation that outside reFerences do in visual fight. Once the role oF each instrument in establishing and maintaining a desired aircraFt attitude is learned, a pilot is better equipped to control the aircraFt in emergency situations involving Failure oF one or more key instruments. Learning Methods The two basic methods used For learning attitude instrument fying are “control and perFormance” and “primary and supporting.” Both methods utilize the same instruments and responses For attitude control. They diFFer in their reliance on the attitude indicator and interpretation oF other instruments. Attitude Instrument Flying Using the Control and Performance Method AircraFt perFormance is achieved by controlling the aircraFt attitude and power. AircraFt attitude is the relationship oF both the aircraFt’s pitch and roll axes in relation to the Earth’s horizon. An aircraFt is fown in instrument fight by controlling the attitude and power, as necessary, to produce both controlled and stabilized fight without reFerence to a visible horizon. This overall process is known as the control and perFormance method oF attitude instrument Flying. Starting with basic instrument maneuvers, this process can be applied through the use oF control, perFormance, and navigation instruments, resulting in a smooth fight, From takeoFF to landing. Control Instruments The control instruments display immediate attitude and power indications and are calibrated to permit those respective adjustments in precise increments. In this discussion, the term “power” is used in place oF the more technically correct term “thrust or drag relationship.” Control is determined by reFerence to the attitude and power indicators. Power indicators vary with aircraFt and may include maniFold pressure, tachometers, Fuel fow, etc.
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This note was uploaded on 01/07/2012 for the course CEE 4674 taught by Professor Staff during the Fall '11 term at Virginia Tech.

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FAA-H-8083-15A - Chapter 04 Section I - Chapter 4, Section...

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