We are seeing more FAI triangles flights done in Canungra. Not everybody understands what are the rules for FAI triangles
FAI triangle is a triangle where the shortest leg is not less than 28% of the total distance. And the distance between the start and finish point is no more than 20% of the total distance. For example, for 100 Km FAI triangle none of the legs can be shorter than 28 km and you can land within 20 km from your starting point for the triangle to be considered closed FAI triangle.
To do a 120 FAI triangle where you don’t have to fly back as far, you can do 50 km leg 1, 50 km leg 2 and 20 km leg 3. This will close potential 150 km triangle with 120 km flown so you get 120km FAI triangle.
Many modern flying instruments will calculate the FAI triangles for you during your flight. If you don't have one of those clever flying instruments there are some free flying apps that you can install.
For example, the xctrack flying application for Android will calculate the FAI triangles for you while you are flying.
http://xctrack.org/