The Rig Before the Drive: A Spinning-Ring Bench as the First Rung of a Spin–Torsion Propulsion Program

SIMULATED, NOT MEASURED — every figure in this paper; nothing has been built, spun, or measured. My propulsion line originates the rung its concepts all stand on before any drive claim: Blueprint Unknown #15 of the Torsion-Ring Plasma Container — whether a spinning ring can be held concentric inside a vessel. This paper presents the bench designed for that question, the Torsion-Ring Spin Rig, R&D Division Package A2 (DOI 10.5281/zenodo.23809726), graded at design-and-simulation level only: a dummy 6061-T6 torus (centreline Ø300 mm, tube radius 15 mm, ≈1.80 kg), two drive/bearing concepts, a transparent surrogate vessel (bore Ø350 mm, 10 mm clearance), and a pre-registered staircase, 500 to 6,000 rpm, measuring ring-centre offset against speed. The re-verified simulation record grades the magnetic-coupled concept C-2 a SIM-PASS at P = 1.000 over 4,000 Monte Carlo draws (eccentricity 95th-percentile 0.020 mm against a 1.0 mm line) and exposes the shaft-driven C-1 as originally dimensioned with its first critical speed inside the staircase at probability 0.64675 — answered by the revision of record (Fix A+B: Ø30 g6 spindle, overhang 140-170 mm; P(pass) = 1.000, worst-corner critical margin ≥ 1.37×, independently checked at 9,281-11,477 rpm). The vendor record answers the coupling gate at ≈5.1 N·m against ≥3.0 N·m required, with one stated envelope deviation (Ø97.5 mm against the 120 mm class) standing as an open design call. A defect found in my own sim's slip sub-check is reported at full size with its vectorised recomputation; the graded conclusion is unchanged. No thrust, no propulsion effect and no torsion-centering result is claimed. Claim grade: MECHANICAL FEASIBILITY ONLY. Design grade: A as revised. Program headline: vacuum catastrophe NOT SOLVED / PARTIAL, producing-count 0.