CRYOPULSE P4.3 | CONDITIONAL DIGITAL PROTOTYPE

Physical measurements: 0. This is a reproducible requirements model, not an installed car or independent proof of beating Bugatti.

Install requirements.txt in Python 3.12. A C++ compiler is required for inherited wheel kernels. Keep all inherited sibling folders from the source archive next to cryopulse-p43/.

From cryopulse-p43/:
  python scripts/selected_events.py nominal
  python scripts/selected_events.py half
  python scripts/selected_events.py suite
  python scripts/selected_events.py heldout
  python scripts/robustness.py named
  python scripts/robustness.py sampled
  python scripts/top_speed.py prepare
  python scripts/top_speed.py

The source includes the saved refined-map run, component CAD checks, shaft sizing and the computational audit. Reproduce the finer pressure surface with floor_map_speed_step_kmh=2.5 and floor_map_command_intervals=80. Run audit.py after all saved dependencies exist. The clean-extraction replay receipt checks the nominal continuous run and four separate speed policies.

One selected assisted launch and stop. Same fitted effective engine curve and tyre law as P4.2; same 10 MJ chemical, 8 MJ DC exchange and 6 kg initial nitrogen accounts. Preparation is counted before the timed launch; four seconds is a readiness target, not part of 0-100. Other modes carry their own stores through a slower launch and must not be combined with the fastest sprint.

New work: four-second preparation, 6700 rpm maximum floor-map requirement, causal energy supervision, priority upper-rotor startup, individual vent-joint limits, a dynamic floor rotor with finite torque/power/kinetic energy, and preliminary supported-shaft sizing. The floor rotor uses a fixed nominal feedforward and delayed pressure feedback; true seal gap and fan efficiency are not controller inputs. All additional sampled cases use the frozen configuration, without case-specific tuning. Finite sampled success does not prove universal robustness.

The final component study uses 20 mm shafts and 20 x 47 x 14 mm bearing envelopes within the unchanged 80 kg assembly budget. shaft_release.py covers the 150 Nm motor peak with 25% branch imbalance. rotor_support.py is the earlier 17 mm development screen, retained for provenance; it is superseded for the released mechanical layout. The dynamic rotor's 0.18 kg m2 acceptance ceiling remains above 125% of the updated CAD inertia screen. The 'cad_inertia_screen_kgm2' field in transient records is the earlier baseline, not a measured property.

History retains failures/corrections, including the old combined-supply startup conflict and time-sampling boundary error. No inherited P4.1 or P4.2 archive was overwritten.

Qualification still required: body drag and internal passages, installed fan/seal maps (including the inherited effective-leak factor), tyre load response, motor voltage/efficiency/cooling and belt response, bearing selection/life/preload, shaft/housing dynamics and containment, cell resistance over SOC/temperature, structural stiffness, cold hardware and complete cabin/crash/fuel-system packaging. Catalogue ceilings and the beam sizing screen are insufficient to qualify these.

The experiment/ folder contains a low-force stationary pressure-head demonstration plan and a blank measurement CSV. Predictions follow pressure times area. No experimental observations have been inserted. This experiment does not prove cryogenic propulsion or full-vehicle performance.
