A race of gliding, gliding, or speed race, usually is divided into a number of trials (minimum three).
Each test consists of a "theme", which is a path marked by "pillars" or turning points. The theme will be awarded to drivers by the race during the briefing mattuttino, which are also described, with the greatest possible accuracy, the weather of the day.
The length of the topic assigned will depend on the forecast day by day more or less favorable conditions of the atmosphere, in turn derived from parameters such as temperature, pressure, humidity and sunshine.
The race will also meteorologist complex phenomena such as more or less unstable air mass, obtained by plotting the data from a survey in the early morning air.
These factors make it possible to predict with reasonable accuracy the evolution of the mass of air in the theater of the race.
This situation will be carefully evaluated by the pilot, trying to get from your machine the best compromise between speed and distance.
The issue of race is presented as a closed polygon whose vertices, called "pillars", should be bypassed in the assigned sequence.
Evidence that the pilot has completed the race course will be provided by an electronic device called "logger" connected to the onboard GPS.
Win the test day, getting the highest score, the pilot will have traveled as fast as the assigned theme.
Finally win the game, the contestant who has achieved the highest overall score, the sum of the partial scores obtained in different days.