A hybrid rocket booster was developed by CISAS "G.Colombo". The activity started from small-scale testing of lab motors and culminated on a successful testing of a demonstrator. The hybrid motor is propelled by self-pressurized nitrous oxide (N2O) as oxidizer and paraffin wax as solid fuel. The peak thrust is 20 kN, the total impulse 50 kNs and the N2O liquid phase burn time 3.5 seconds. The paper presents the design and development strategy applied.
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