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15 votes

Why aren't smaller fairings used for smaller payloads?

Getting parts space-qualified is a very expensive and lengthy process. It does not make any economic sense to build one-offs. In particular, unlike any other currently operating orbital launch vehicle,...
9 votes

Would ejecting propellant close to light speed result a '"dream engine"?

Yes, your conclusion is right, and no, your argument is wrong. If the problem to generate enough electric power is solved, then (near-)lightspeed exhaust velocity is the way to go. Arguing with ...
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