Questions tagged [methalox]

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Tory Bruno mentioned "unsolvable combustion instability" of "large methane engines". What, why, how?

Relevant tweet, an hour ago: https://twitter.com/torybruno/status/1405210138189864960?s=19 a Tweeted Question: Why wasn't methane used in the 2000s, when it was readily available unlike the time ...
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1answer
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How does one determine the optimal CH4:O2 ratio in a methane-LOX rocket engine?

The SpaceX Raptor uses a 78:22 O2:CH4 ratio. It also has combustion chamber pressures higher than any other rocket engine ever built. My questions are: What's the math / chemistry that determines ...
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2answers
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How does SpaceX plan to deal with possible methane buildup around Starship?

Starship is going to be fueled with cryogenic liquid methane. Before launch, the vehicle will spend some time fully loaded on the launchpad. Although methane is lighter than air at normal temperature, ...
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2answers
145 views

Has combustion of premixed LCH4 and LH2 with LOX been investigated for larger rocket engines?

I can only find two papers on blended methane/hydrogen combustion not related to internal combustion engines, and both of those (Mento et al. 2009 and Rosen et al. 2011) are very limited in scope. I ...