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by jvmboi
835 days ago
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It makes sense that the engines would be heavy and they are heavy on the launch vehicle. I am not sure how the ratios come out there but I'd still expect the fuel to, by far, take up most of the mass. Then engines for maneuvering in space and to land on the moon don't have to be very big. I looked up the figures for Apollo and found out the following: "The Apollo's "lunar module descent engine" weighs a mere 180 KG vs the approx. 4200 KG of the rest of the craft (dry mass). Just the fuel for the descent is then roughly 8000 KG." |
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