Salami Rocket

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Version vom 16. Juni 2009, 17:42 Uhr von Amir (Diskussion | Beiträge)

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WTF?

Hybrid rocket propulsion system conceptual overview

Nomen est omen. Salami rocket is about building a hybrid rocket with a gaseous oxydizer and salami as propellants.

Oxydizer

I'd prefer N2O over 02 because although N2O carries a lot of conjectural inert nitrogen (64%) oxygen is much harder to handle (tank filling, storage & injection). Additionally the nitrogen, though not participating in combustion, raises the fuel erosion rate and cooles the nozzle enough to reuse it many times.

Fuel

Salami: High efficency hydrocarbon based fuel ;)

Draft

  • Run Tank: A light-weight container for the oxydizer capable of sustaining enough pressure
  • On/Off Valve: Enables/Disables oxydizer flow.
  • Throttle valve: A valve to allow precise regulation of the oxydizer flow from the run tank to the combustion chamber.
  • Injector: Aids in vaporizing the (still) liquid oxydizery.
  • Combustion Chamber: Where the oxydizer/fuel mix burns. Additionally to pressure (same amount as for the run tank) it has to sustain heat.
  • Nozzle: An opening that dramatically accelerates the hot gas escaping the combustion chamber.

Shopping list

All parts directly participating in the combustion would have to sustain at least 51 bar (vapor pressure of N20 at 20°C) but for reasons of safety i assume 100bar as the minimum.

Run Tank

Smart Parts C02 aluminium tank for paintball guns with on/off valve.

  • Capacity: 591ml (20 oz)
  • Connector: 1,27cm (1/2")
  • Max Pressure: 200bar
  • Price: 45€

On/Off Valve

No separate valve needed since the proposed CO2 tank has it built-in.

Throttle valve

An adjustable throttle valve (Stasto VRB-030) intended for use in hydraulics.

  • Connector: 1,27cm (1/2")
  • Flow rate: 45 l/min
  • Working pressure: 350 bar
  • Price: 30€

Injector

Probably custom made. Basically a shower head ;).

Combustion Chamber

C02 aluminium tank for paintball guns without on/off valve.

  • Capacity: 591ml (20 oz)
  • Connector: 1,27cm (1/2")
  • Max Pressure: 200bar
  • Price: 14€

Nozzle

Graphite laval nozzle that sustains up to 2000°C. No suitable model found yet.

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