(Space Team Aachen Hybrid Rocket)
A "STAHR" is born.
While our previous rockets used commercial off-the-shelf (COTS) solid propellant engines, our next project shall be powered using a hybrid engine designed and developed entirely by Space Team Aachen. Hybrid engines use propellants stored separately and in different states of matter, which increases the overall safety of the propulsion system while also providing high-performance. For our design, a combination of liquid nitrous oxide and a solid paraffin fuel has been selected.
The Space Team Aachen Hybrid Rocket, also called "STAHR", is set to reach an apogee of 10km. It is being designed and launched as part of the STERN (STudentische Experimental RaketeN) program of the German aerospace center (DLR), whose aim is to support student teams in the development of suborbital rockets. STAHR is set to launch in 2024 from Esrange, Sweden.
STAHR is designed around the first rocket engine developed by the Space Team Aachen. This engine is laid out to reach an average thrust of 3000 Newton, which shall launch the rocket at supersonic speeds to an altitude of around 10 km. The engine, and the test bench required to perform engine tests, have been in development since early 2020. The first “hot fire” tests using a subscale engine have already been carried out in early 2022.
We expect to conduct engine tests up until the launch using our own test bench at both the Shock Wave Laboratory in Aachen and at a DLR site. The project and its evolution are supervised by both the DLR as well as RWTH institutes in order to guarantee that that all the rocket’s requirements are met.
The rocket’s body will be manufactured out of carbon fiber using state-of-the-art winding and 3D printing techniques. The tank, necessary to store up to 30 kg of oxidizers at a pressure above 60 bar, will also be manufactured in-house out of CFK, enclosing an aluminum liner. The rocket’s avionics, which monitor and gathers its flight and engine data are designed redundantly, using both student-developed and commercially available flight computers. The recovery system, which guarantees the rocket's safe return to the ground, will once again feature a dual parachute system consisting of a drogue and main chute. Unlike our previous rockets, the used parachutes will not be bought but rather manufactured by the students with help from our partner institutes of RWTH Aachen University.
BUILD INDIGENOUS PROPULSION
STAHR's hybrid-engine will be designed ground-up and fully custom-made.
REACH 10KM APOGEE
STAHR aims to reach 10km, more than thrice the apogee of CARL.
Target altitude: 10 000 m
Propulsion: Student Researched and Developed (SRAD) hybrid engine
Thrust averaging 3000 N
Supersonic flight speed
Launch weight: 100 kg
Redundant dual-event parachute recovery system