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2

"Musk stated de-sooting the turbopump was an issue. I wonder if it would be difficult to build a new turbopump that runs on a less sooty third (pump) fuel." IMHO this gets to the heart of the Mean Time To Failure issue - Kerosene combustion has an inherent soot problem that is going to be detrimental to substantial increases in MTTF. The real ...


5

The volume change is negligible for most purposes. Ordinary liquids (water, organic solvents, hydrazine) are relatively incompressible in the sense that their change in density is negligible for easily accessible pressures. 22 bar is only 4 times what I pump my bike tires up to with a manual pump, so it's not that extreme. This 1977 US Air Force document ...


1

According to "Development of Hydrogen Peroxide Monopropellant Rockets" (.pdf, 2006) by Angelo Cervone, Lucio Torre, Luca d’Agostino, Antony J. Musker, Graham T. Roberts, Cristina Bramanti, and Giorgio Saccoccia: Alta S.p.A. (Italy) and DELTACAT Ltd. (United Kingdom) are conducting a study, funded by the European Space Agency, ...


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Armadillo Aerospace attempted to use both 90% hydrogen peroxide and later switched to hydrogen peroxide (50% concentration in water) and methanol as a mixed monopropellant for their vehicle. My internet-fan memories were that, at least with the 90% solution, they were having severe problems getting a consistent burn and tried many catalyst and injector ...


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