Haas was a Romanian carrier rocket, which was developed by ARCA as part of the ELE programme. It was designed to be air-launched from a high-altitude balloon, similar to the American Rockoon experiments of the 1950s. Prior to the development of Haas, ARCA had already launched two Stabilo rockets from balloons. It is fueled by hydrogen peroxide and bitumen.
The Haas rocket is a three-stage rocket capable of placing 400 kilograms of payload into low Earth orbit. Its maiden flight will carry the European Lunar Explorer spacecraft, ARCA's entry into the Google Lunar X-Prize, following a series of engine tests which began in 2009.
It was abandoned when ARCA decided to stop using solar and helium balloons for their space program.
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