Flight Instruments for the Private Pilot (Aviation Books for the Private Pilot) by Dr Stephen Walmsley

Author:Dr Stephen Walmsley [Walmsley, Dr Stephen]
Language: eng
Format: mobi
Published: 2022-04-10T00:00:00+00:00

Figure 5.1: The t-display is a common flight instrument layout.

Some displays can increase the risk of pilots incorrectly reading information; with the classic three-pointer altimeter one example. This type of altimeter displays altitude using three pointers (hundreds, thousands and tens-thousands of feet), with all the pointers being a similar width. During a high workload or stressful situation, pilots have misinterpreted the pointers; for example, reading 10,000 feet instead of 1,000 feet. Similarly, parallax error can occur in some conventional instruments (e.g. airspeed, altitude), whereby viewing the instrument pointer from an angle can result in an incorrect reading. The wide implementation of digital displays has mostly eliminated both of these issues.

Color is a very useful tool in displaying the importance or relevance of information, as shown in Figure 5.2. The color alone can tell the pilot the significance of the information. Red color is used to indicate something serious, for example, red markings on the airspeed indicator, like VNE. Amber or yellow indicates caution, meaning pilots should be careful operating in that particular range (e.g. operating in the yellow airspeed range). Blue is usually used for general information, for example, the position of the flaps. Green is for normal operating range, such as normal engine indications (e.g. oil pressure).

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