On designing them a few weeks back that went into the economics of it later on in the video. I'm sure people have managed to make KSP shuttles that have a much better economic efficiency than mine, but I don't see how you could even come close to making up the cost difference between a shuttle and a rocket. Obviously, the main difference is that I am putting an entire spaceplane into orbit compared to just a satellite, but I thought the whole point of the shuttle was to make the expensive stuff reusable. Is there a reason that the shuttle option is so expensive? I'm guessing fuel may be disproportionately expensive when compared to engines. By comparison, I could mount the satellite to a rocket and get it into orbit for maybe 5,000 funds. Putting a small satellite in orbit from the cargo bay, costs me about 25,000 funds (it could be reduced by taking fuel out of the orange tank as I have a fair bit more delta-V than I need). The shuttle was fairly small (Mk 2 parts), had a small cargo bay and a small monopropelant tank for completing my orbit. The shuttle has 3 LV-T45's (2 firing initially and a third for when the SRB's finish burning to balance the thrust vector). It consisted of a launch stage with 2 S1 SRB-KD25k's radially mounted to an orange tank, which fed fuel into my shuttle. After a fairly long time tweaking things in the SPH and numerous unsuccessful test flights, I managed to make a shuttle that performed pretty well. For a while I had wanted to make a space shuttle on KSP, but had never really got round to it until the last few days, when I thought I'd give it a try.
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