/sci/ - Science & Math

>>11412464
Really depends on your funding, team, materials, and equipment, etc. If I were going to start building rocket engines, I'd probably start with what is basically a maneuvering engine, something like the LM's .44kN RCS thruster. Assuming you want to learn a lot, you'll go through scores of iterations, which is made a lot easier if your rocket is only about five pounds as opposed to 50.