In general

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Hybrid propulsions combine the characteristics of solid fuel propulsions and liquid fuel propulsions. Similar to an solid fuel propulsion, the fuel is solid, while the oxidizer is liquid or gaseous. This helps to simplify the structure, as only one conveyor system is needed. The engine can be regulated nonetheless, and be shut down in case of an emergancy, which brings enormous advantages in safety, compared to an solid fuel engine. That is why for the first private spaceship, which is SpaceShipOne by Virgin Galastic, a hybrid engine was chosen. Of course, there are also a few disadvantages, e.g. the reachable performance per kilogramm of fuel is lower than for liquid fuel engines and the structure is more complex as for solid fuel engines.

WARR and hybrid engines

Hybrid engines have a long tradition at WARR. The launch of the first German hybrid rocket, called Barbarella, took place after various engine tests in 1974. From this point, WARR constantly developed studies and demonstrator engines in this thematic area. Since 2005, the activities in the field of hybrid propulsions rised again, especially because of the HY500T engine, which led to the project HYPER in 2009. Following extensive tests, the HYPER engine was used for the first time within the launch of the WARR-Ex2 in 2015 in Brazil. 


Since April 2013, WARR is part of the programm STERN, which is organized by the DLR (German Aerospace Center) and enables students to develop and launch their own rockets.


For details of the engines, please click on the pictures below:





For details of the rockets, please click on the pictures below:




Contact Us

Hybrid Propulsion
general inquiries

Marco Stemer
student lead

WARR Social