Test world championship in helicopter sports is starting today at the airfield «Borovaja». This is a rehearsal of the full-format planetary competition to be hosted by Belarus for the first time next year. The day before, an open exercise was held. About 30 crews from five countries are going to compete for medals in seven disciplines. The «Pronebo» (Professional Sky) festival is the most spectacular part of the aviation week. Last year, it brought together more than 20 thousand people. Next weekend, a unique show with helicopters, airplanes and the national paratroopers' team will be held. The airfield will also see the first pan-Belarusian drone race.