FIG. 1
Some manufacturers develop their own proprietary flight displays, as seen in this Leonardo AW169. Photo: Lyn Burks
the information density. Information density is the amount of information per pixel of the display area. Garmin chose to make the attitude indicator occupy almost the entire PFD, with a brown color representing the ground and a blue color representing the sky. By contrast, an analog attitude indicator is much smaller but uses a similar color scheme. In the G500, the altimeter and vertical speed indicator are on the right side of the PFD, the airspeed indicator is on the left side, and both the heading indicator and rate-of-turn indicator are on the bottom. The inclinometer (slip/ skid indicator) is incorporated with the bank index on the attitude indicator (Fig. 1). This arrangement is similar to a traditional six- pack configuration, with the primary exceptions being the location of the turn coordinator and the fact that the turn coordinator is divided into two pieces instead of being displayed as a single integrated instrument. Another difference is that the G500 displays airspeed, altitude, and vertical speed as vertical “tapes” as opposed to traditional dials.
However, when we look at the size of each instrument, things begin to differ even more. In a traditional cockpit, each circular instrument is roughly the same size. The general trend in modern PFDs is to increase the size of the attitude indicator (Garmin, 2016). In the Garmin PFD, the attitude indicator occupies almost the entire PFD and sometimes acts as the “active background” of the entire display. The heading indicator is given greater prominence as the second-largest instrument, while the airspeed indicator and altimeter are roughly the same size. The vertical speed indicator is the smallest of the primary flight instruments.
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