This summer, Copenhagen Suborbitals are launching the Nexø II rocket, as the next step towards their goal of flying an amateur astronaut into space. The rocket is the second of the Nexø Class to fly, named after the city of Nexø on the Bornholm island that hosts the Danish spaceport. Standing 6.7 m tall, Nexø II is the second, fully guided and liquid fueled rocket built by the group. The rocket also features a new pressure regulating system to maximize engine performance. The rocket will be launched from the Mobile launch platform Sputnik on the Baltic Sea east of Denmark.
“These days everyone is working around the clock to make the mission happen” says Kristian Elof Sørensen, Chairman of Copenhagen Suborbitals. “Nexø II is the most advanced rocket we have ever built, and a successful mission this year is important for our effort to build a rocket big enough to put a man in space.”
Copenhagen Suborbitals have built and launched rockets from Denmark since 2011, when their HEAT-1X made headlines as the biggest, amateur rocket ever flown. The group is the world’s only manned, amateur space program, with 50 volunteers building rockets and space capsules in a central copenhagen workshop, all completely crowdfunded.
The Nexø II is one meter taller than Nexø I due to the implementation of a new pressure regulating system that Copenhagen Suborbitals have developed and tested since the 2016 flight.
The engine of Nexø I was recovered after the 2016 flight and its injector and other parts are reused on Nexø II. This makes Nexø II the first of Copenhagen Suborbitals rockets to reuse critical parts for a second flight.
“Nexø II will not fly into space, but the technologies we are testing are the same needed to build our manned rocket, Spica” says Kristian Elof Sørensen. “The Spica rocket is so big that it makes sense to build smaller rockets first to test the subsystems on a smaller scale. On Nexø II we have used the leanings from the Nexø I flight to improve a lot of little details that hopefully will give us a perfect flight this year.”
The flight will happen between July 1st and September 1st, with the actual date depending on weather conditions.
“The rocket is ready, so we are now in the process of coordinating with the authorities. Also we need stable weather conditions. We need a calm day and waves under 0.5 meters in the Baltic sea for the launch” says Kristian Elof Sørensen