Figure 4.9: Critical Airspace Data
4.5 Triangle Assistent
Figure 4.10: Triangle Assistent
According to FAI code, section 3, and also the XC-Contest rules, an FAI triangle must satisfy the 28%
leg rule, which states that the shortest leg must not be less than 28% of the total leg distance. The
Flymaster FAI triangle assistant module provides numerical and graphical, information about the triangle
status, distances, and required navigation to fulll the 28% rule. Since automatic detection of the triangle
vertices is very dicult, we decide to let the pilot manually decide on the rst and second vertex rather
than have this automated since this may lead to invalid triangles. The Triangle Assistant page allows the
pilot to manage the execution of a FAI Triangle by manually set the triangle vertices. The page can be
accessed through the main Menu (see Figure
4.10
), and the page options can be seen in Figure
4.11
. A
short description of each option can be seen in Table
4.5
30
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