Physical System

Gasesous Oxygen - Liquid Ethanol (95%) Rocket Engine

Piping & Instrumentation Diagram (P&ID) for ELLIE

Cross-sectional view of the ELLIE thrust chamber, injector, and load cells

• Thruster:

  • Radiatively Cooled (Heat Sink) Combustion Chamber / Nozzle

  • Injector: Coaxial Shear element mixes compressible GOX with ethanol. Dampens pressure instability through 30% Combustion Pressure element flow resistance

  • Thrust Measurement: (Target 30lb thrust)

    • Three S-type load cells, together, measure total thrust force

  • Pressure Measurement:

    • Wheatsone Bridge Diaphram Pressure Transducers measure intense distributed forces

• Feed System:

  • Energy Regulation:

    • Spring-Loaded Regulators and Stainless Steel Ball 2/3-way Valves.

    • High-Pressure copper tubing, braided stainless steel flex hoses.