Water Rocket Competitions

The Oscar Swigelhoffer Trophy is an Aquajet (Water Rocket) competition held at the Annual International Rocket Week in Largs, Scotland and organized by STAAR Research through John Bonsor. The competition goes back to the mid-1980s, organized by the Paisley Rocketeers who have been active in amateur rocketry since the 1930s. The trophy is named after the late founder of ASTRA, Oscar Swiglehoffer, who was also a personal friend and student of Hermann Oberth, one of the founding fathers of rocketry.

The competition involves team distance flying of water rockets under an agreed pressure and angle of flight. Each team consists of six rockets, which are flown in two flights. The greater distance for each rocket over the two flights is recorded, and the final team distances are collated, with the winning team having the greatest distance. The winner in 2007 was ASTRA. The competition has been regularly dominated over the last 20 years by the Paisley Rocketeers.

The United Kingdom's largest water rocket competition is currently the National Physical Laboratory's annual Water Rocket Challenge. The competition was first opened to the public in 2001 and is limited to around 60 teams. It has schools and open categories, and is attended by a variety of "works" and private teams, some traveling from abroad. The rules and goals of the competition vary from year to year.

The Water Rocket Achievement World Record Association 1000 Foot Challenge. Teams compete to be the first to fly a water rocket over 1000 feet (305 meters),

The oldest and most popular water rocket competition in Germany is the Freestyle-Physics Water Rocket Competition. The competition is one part of a larger part of a student physics competition, where students are tasked to construct various machines and enter them in competitive contests.

Science Olympiad also has had a Water Rocket event in past years.

See more about it here:
http://www.youtube.com/watch?v=yd39dtOp1zQ&feature=related