> The primary (?) advantage of methane over kerosene is that it doesn't deposit soot on engine parts Some people would disagree. AFAIK, by professionals methan

> The primary (?) advantage of methane over kerosene is that it doesn't deposit soot on engine parts Some people would disagree. AFAIK, by professionals methane was always considered first for better Isp, even though Clark dismisses the advantage. Here's another example of disagreement, regarding virtues of hydrogen peroxide - https://yarchive.net/space/rocket/fuels/peroxide.html https://yarchive.net/space/rocket/fuels/peroxide.html - "It's only bad habit is that it decomposes exothermically -- and since the rate of decomposition is accelerated with temperature, this reaction can run away from you. But that hardly deserves the bad press it's gotten. LOX will also bite you, quite readily, if you're careless. "Wings" simply got it wrong. (Even _Ignition!_, while pretty sour on hydrogen peroxide due to the decomposition hazard, has the facts right, and only the emphasis is arguable -- I don't understand how someone can cozy up to ClF5 while considering peroxide dangerous; but that was Clark's position! )" Jeff Greason (of XCOR fame, among others)