shown which indicates the average thermal climb rate. This value is always positive. In the next column
a double arrow is shown which indicates the next expected thermal climb rate. Finally, the last columns
show 2 bars indicating the climb rate and the sink rate. See more about the McCready indicator in
Chapter
5
.
Figure 3.3: Double Bar Vario and McCready Indicator
Dial Analog Vario
The Dial Analogue Vario element shows the instantaneous vertical speed (Figure
3.4
). This element can
be resized and re-positioned. Climb or sink rates are shown by the position of the needle on the analogue
dial. The maximum and minimum climb rates can be set using the DESIGNER software.
Figure 3.4: Dial Vario
3.1.4 Altitude graph
The Altitude graph element (Figure
3.5
) corresponds to a graph of barometric altitude versus time. Alti-
tude is shown in the vertical axis graduated in meters with time shown on the horizontal axis graduated
in seconds.
Figure 3.5: Altitude Graph Element
The range of the horizontal axis is xed and corresponds to 240 seconds (4 minutes), while the range of the
vertical axis is automatically adjusted in order to accommodate the gained height. In reality the altitude
graph element is a plot of the absolute barometric altitude over the last 4 minutes of ight (Figure
3.6
).
9
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