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Questions regarding rocket propellant in liquid form, the main type used for chemical rockets.

2 votes
2 answers
186 views

Is there a "green" hypergolic propellant?

Is there any such thing as a non-cryogenic, liquid, "green" hypergolic bipropellant, where green means environment friendly and non-toxic?
  • 1,353
0 votes
1 answer
187 views

Highest Isp achieved with nitrous oxide as oxidizer

What is the highest Isp achieved on orbital rocket for an engine that used nitrous oxide as oxidizer? Both hybrid and liquid engines can be considered. Not considering nitrous oxide monopropellant sin …
  • 1,353
3 votes
1 answer
569 views

Open source liquid rocket engine

Is there an open source bi-propelant liquid rocket engine that would have all the documentation, computations, test results and 3D design files (CAD) freely accessible?
  • 1,353
3 votes
0 answers
95 views

Injector design - LOX vs nitrous oxide

What will be the main design differences between using liquid oxygen and liquid nitrous oxide as oxidizer in a bi-propellant rocket engine? What liquid/gas properties (vapor pressure etc.) play the bi …
  • 1,353
7 votes

Open source liquid rocket engine

Several papers have been published on liquid rocket engines. Below is a collection of some. Some links are from ResearchGate so you need an account there (free for academics/students). With 3D files: …
  • 1,353
5 votes
2 answers
7k views

Rocket fuel cost to launch 1 kg to orbit

I have 2 questions about the cost of liquid rocket fuel to launch (anything) to LEO orbit. Let's assume we use fuels used in commercial spaceflight today (probably LOX+LH2 or LOX+RP-1 etc.). What is …
  • 1,353