A Hot-Water Access Drill for Europa: Jet Melting Power, Flow and Rapid Hole Production Budget

The system named in the title is developed here as a worked design, derived from the physics of its operating environment and reported throughout as SIMULATED, NOT MEASURED. The drill is a civilian science system that opens a reusable access hole for lowering oceanographic instruments toward Europa's ocean; it serves peaceful exploration only. The deposited computation script produces every number in the paper from stated inputs; among its results are required surface heating of 4.96 megawatts, drilling duration of 13.78 days and campaign heating energy of 1.64 gigawatt-hours. The study assembles component budgets for mass and power, examines how the design behaves away from its design point, and closes with an explicit statement of what the sizing does not establish.