World Record
The Guinness World Record of launching most water rockets simultaneously is in hands of Gotta Launch, when on 19 June 2009, they launched 213 of them at the same time, together with students of the Delft University of Technology.
The current record for greatest altitude achieved by a water and air propelled rocket is 2044 feet (623 metres), held by U.S. Water Rockets on 14 June 2007. This altitude was calculated by averaging two flights. The first flight achieved 2068 feet (630 meters) and the second 2020 feet (615.7 meters). The rocket also carried a video camera as payload on both flights as part of the verification required by the competition rules.
Read more about this topic: Water Rocket
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