Testing the 75kN hybrid rocket motor made by HyImpulse at German Aerospace Center, DLR’s Lampoldshausen facility in Germany, based on a low-cost hybrid propulsion technology. The rocket motor uses "space-grade candle wax" and liquid oxygen as propellants.

HyImpulse Technologies, based in Neuenstadt am Kocher in Southern Germany is developing a three-stage small launcher. Their three-stage launch vehicle, called SL1, will also be powered by green hybrid propulsion technology, using liquid oxygen and paraffin as propellants. The lightweight rocket is designed to launch small satellites up to 500 kg out to low-Earth orbit.

HyImpulse technologies was one of the first three companies to gain support from Boost! – ESA's Commercial Space Transportation Services and support to Member States programme.

Through Boost!, ESA supports the development, deployment and use of new European commercial space transportation services, under private leadership and responsibility.