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Hypergolic fuels are important in the history of spaceflight. Many early rockets were adapted from ICBMs which had to be ready to fire at a moment's notice. Naturally, using a fuel and oxidiser that was stable at human-tolerable temperatures was a logical choice. Hypergolics have been largely...

I find designing craft hard. A lot of the time, they're overbudget, underpowered, and overweight. There's a good chance it's because of my mildly questionable modlist, but if it's a skill issue, I had an idea for a building at the space centre where you can plan missions. You input starting...