> The Raptor engine, however, really is a massive achievement and is somewhat comparable to developing fusion power. Disagree, the theory of full-flow gas gene

> The Raptor engine, however, really is a massive achievement and is somewhat comparable to developing fusion power. Disagree, the theory of full-flow gas generators, and test bench results, were known for many years. At the same time with fusion we only have experience with uncontrolled one (bombs), or theory of how stars operate (and we can't reproduce that mechanism, not enough gravity). There is a lot more science to discover in fusion than in Raptors.