The flying machines are usually launched off a pier about 30 feet high into the sea or lake.
Most competitors enter for the entertainment value, and the flying machines rarely fly at all.
The first Red Bull Flugtag competition was held in 1991 in Vienna, Austria.
The most recent one this year was held inTel Aviv, Israel, on June 3.
According to the organizers, some 50,000 spectators had gathered to enjoy the event.
Anyone is eligible to compete in the Flugtag event.
Teams compete at the Flugtag competition under three categories - distance, creativity, and showmanship.
