On 8 November 2016 at 1030 hrs, the Hybrid Experimental Rocket Stuttgart (HEROS) 3 was launched from the European Space and Sounding Rocket Range (ESRANGE) Space Center to an apogee altitude of 32,...

Hybrid Experimental Rocket Stuttgart: A Low-Cost Technology Demonstrator

Experimental Investigation of Fuel Composition and Mix-Enhancer Effects on the Performance of Paraffin-Based Hybrid Rocket Motors

Low cost small-satellite access to space using hybrid rocket propulsion

Utilization of additive manufacturing in hybrid rocket technology: A review

A series of firing tests have been performed on a laboratory-scale hybrid rocket engine of 200 N class, fed with gaseous oxygen through a converging nozzle injector, to assess the mechanical feasib...

Two-Hundred-Newton Laboratory-Scale Hybrid Rocket Testing for Paraffin Fuel-Performance Characterization

The combustion behavior of paraffin-based hybrid rocket fuels with gaseous oxygen as an oxidizer has been
analyzed in detail. Regression rate tests have been done in a two-dimensional radial microburner at the DLR, German
Aerospace Center and at the Space Propulsion Laboratory. Fuel samples have been characterized by viscosity
measurements, tensile tests, and a differential scanning calorimeter. Tensile tests showed significant improvement in
maximum stress and elongation when polymers in low concentration were added to the paraffin samples. The values
of the liquid fuel viscosities differed significantly between the selected fuels. This affected the droplet entrainment
process during combustion and the regression rates of the fuels. The entrainment and regression rate increased for the
decreasing fuel liquid layer viscosity. An exponential relation has been found between the liquid fuel layer viscosity
and the regression rate, which can be used to predict the regression rate of new liquefying fuels by measuring their
viscosity.

https://arc.aiaa.org/doi/pdf/10.2514/1.B36207

L. T. De Luca

Papers

Viscosity and Regression Rate of Liquefying Hybrid Rocket Fuels