In 2011 the rocket was successfully launched, reaching an altitude of 2.8 kilometres (1.7 mi) before the engine was remotely shut off due to a wrong trajectory.

The Micro Spacecraft (MSC) had a steel pressure hull, and room for one passenger designed and built by Kristian von Bengtson who co-founded Copenhagen Suborbitals.

The ship was named after Tycho Brahe, a Danish nobleman known for his accurate and comprehensive planetary and other astronomical observations, such as the 1572 supernova.

[3] This HEAT rocket (Hybrid Exo Atmospheric Transporter) with liquid oxygen and polyurethane, would carry the MSC (the micro-spacecraft) above the 100 km boundary and into space.

[3] They preferred another area and then gave a formal and written permission to launch from a firing range in the Baltic Sea.

The first full-scale test-launch to 30 kilometres (19 mi)[3] was planned to be off the coast of Bornholm sometime between 30 August and 13 September 2010[11] depending on the weather.

[12] The launch carried a crash test dummy "Rescue Randy" instead of a human pilot, since crewed flight is still some years away.

[14] A launch attempt was made on Sunday 5 September 2010 14:43 CET, 12 UTC+02:00,[15] but this was a failure due to a stuck LOX valve.

[16] The vehicle on board launch platform Sputnik, sometimes pushed by homebuilt submarine UC3 Nautilus and sometimes towed by M/V Flora, moved from Copenhagen on Tuesday 31 August 2010[8][17] to Nexø on Wednesday 1 September 2010.

[22] Power to the hairdryer was supplied by Nautilus until the platform was evacuated, but the 20 minutes from then to launch drained the batteries and left the LOX valve unheated so it froze.

After lift-off, HEAT 1X Tycho Brahe achieved supersonic speed but its flight path deviated from the vertical, so Mission Control had to shut the engine off after 21 seconds.

Tycho Brahe's parachutes didn't unfold correctly either, so the spacecraft received a large bulge at the 26 G impact.

The booster sank to a depth of 80–90 meters in the Baltic Sea[24][25] A film of the launch from the pilot's point of view has been released.