Hypergravity-Habitat
Hypergravity Habitat
A proposal-oriented research documentation project for sustained moderate hypergravity as a terrestrial experimental environment.
Executive Summary
Hypergravity Habitat is an early-stage research and feasibility documentation project. It explores whether a terrestrial platform could support controlled experiments at sustained effective gravity levels above Earth-normal gravity.
The project addresses a possible gap between existing altered-gravity research regimes: orbital microgravity, parabolic flight, bed-rest analogues, high-g exposure, short-duration centrifugation, biological centrifugation, and conventional laboratory studies. These platforms are scientifically valuable, but they do not fully answer what could be learned from sustained, moderate, experimentally controlled hypergravity exposure over durations long enough to observe adaptation rather than only acute response.
The central research question is:
How do biological, technical, and human-centred systems respond to sustained effective gravity above 1 g over scientifically meaningful durations?
This repository does not propose immediate construction or operation of a facility. Its purpose is to develop a rigorous basis for literature review, modelling, demonstrator definition, expert discussion, feasibility assessment, and future collaboration.
Repository Status
This repository is an exploratory research documentation project. It is intended to support literature review, modelling, demonstrator definition, expert feedback, and pre-feasibility planning.
It does not propose immediate construction, human exposure, clinical use, sports-training use, or operation of any facility. Any real-world implementation would require formal scientific review, engineering validation, safety assessment, ethics approval, medical governance, regulatory compliance, and institutional oversight.
For external review, please start with Public review coordination and next-stage roadmap.
Research Vision
The long-term vision is to evaluate whether sustained moderate hypergravity deserves to be developed as a distinct research-infrastructure class.
Potential research domains include:
- artificial-gravity research,
- space medicine and countermeasure research,
- human physiology,
- biomechanics and human performance,
- plant science,
- cell and microbial biology,
- controlled-environment agriculture,
- railway and maglev engineering,
- rotating-platform and guideway demonstrators,
- research infrastructure planning.
The project remains architecture-neutral. Circular railway systems, magnetic levitation systems, rotating structures, payload-only rigs, and hybrid demonstrators are treated as candidates to be compared against common scientific and engineering requirements.
Research Gap
| Research regime | Typical platform | Typical duration | Gravity environment | Limitation for this project |
|---|---|---|---|---|
| Orbital microgravity | Space station | Days to months | Near 0 g | Not elevated gravity |
| Parabolic flight | Aircraft | Seconds | Alternating low-g and high-g | Too short for adaptation |
| Bed-rest analogue | Clinical facility | Days to months | 1 g with unloading analogue | Does not create elevated effective gravity |
| Human centrifuge | Ground centrifuge | Minutes to hours in many protocols | Elevated acceleration | Usually not a continuous habitat or laboratory |
| Biological centrifuge | Laboratory centrifuge | Variable | Elevated acceleration | Often small-scale and payload-specific |
| Hypergravity Habitat concept | Terrestrial circular, rotating, or guided platform | To be studied | Moderately above 1 g | Requires feasibility validation |
The research gap is the lack of a clearly defined, controlled, long-duration research environment for studying moderate hypergravity as its own scientific regime.
Evidence Levels
All documents should distinguish between evidence levels.
| Evidence level | Meaning |
|---|---|
| Established knowledge | Supported by accepted physics, engineering practice, or peer-reviewed literature |
| Engineering principle | Direct consequence of transparent equations and assumptions |
| Engineering estimate | Approximation based on stated assumptions and uncertainty |
| Working hypothesis | Plausible idea requiring validation |
| Open research question | Topic requiring further review, modelling, or experiment |
This distinction is essential because the project combines established mechanics with early-stage infrastructure concepts.
Main Documents
Concept and Proposal Framing
docs/concept-note.md— proposal-grade concept framing.docs/proposal-brief.md— short brief suitable for academic or institutional feedback.docs/research-gap.md— structured research-gap analysis.docs/literature-review.md— annotated literature review, search strategy, inclusion/exclusion criteria, and evidence matrix.docs/scientific-questions.md— research-question catalogue.docs/glossary.md— controlled terminology and notation.
Programme, Governance, and Reviewability
docs/roadmap.md— staged research and development roadmap.docs/work-packages.md— proposal-style work packages, deliverables, and milestones.docs/risk-register.md— preliminary risk register.docs/safety-case-outline.md— preliminary safety-case framework.docs/ethics-and-governance.md— human, animal, biological, sports-science, and data governance framework.docs/data-management-plan.md— FAIR/open-science and sensitive-data handling framework.docs/requirements-traceability-matrix.md— requirement-to-evidence traceability.docs/ai-use-and-transparency.md— AI-use disclosure and verification responsibility.docs/documentation-style-guide.md— documentation style, formula notation, and public-readiness rules.docs/external-review-request-template.md— template for contacting potential reviewers and collaborators.
Demonstrator and Architecture Logic
docs/facility-comparison.md— comparison with existing research infrastructure.docs/architecture-trade-study.md— comparison of no-build, existing facilities, payload demonstrator, rotating, rail, maglev, and hybrid options.docs/minimum-useful-demonstrator.md— payload-first demonstrator strategy.docs/experimental-programme.md— staged experimental programme.docs/physics-reference.md— physics and notation reference.docs/vibration-and-confounders.md— confounder-control framework.docs/habitability.md— human-factors and habitability framework.
Science
docs/science/human-physiology.md— human physiology and adaptation questions.docs/science/biology.md— cell, microbial, organismal, and model-system biology.docs/science/plant-science.md— plant growth, gravitropism, controlled-environment agriculture.docs/science/sports-science.md— human performance and sports-science questions, treated cautiously as a later-stage domain.docs/science/coriolis-projectile-accuracy.md— Coriolis limits on sport-specific projectile accuracy and skill maintenance during hypergravity residency.
Engineering and Feasibility
docs/engineering/design-requirements.md— technology-neutral requirements framework.docs/engineering/preliminary-sizing.md— vector-corrected radius, speed, acceleration, and sizing model.docs/engineering/railway-platform.md— circular railway concept assessment.docs/engineering/tilting-train-and-cant-limits.md— tilting trains, track cant, cant deficiency, floor alignment, wheel unloading, and maximum-g constraints for railway concepts.docs/engineering/railway-g-envelope.md— first-order achievable-g corridor for railway concepts under cant, cant deficiency, tilt, and safety constraints.docs/engineering/full-ring-vehicle-concept.md— mechanically connected full-ring vehicle concept between conventional railway and rotating annular habitat.docs/engineering/maglev-platform.md— magnetic-levitation concept assessment.docs/engineering/transfer-system-concept.md— staged access, logistics, and emergency-transfer concepts.
Economics, Calculations, and Figures
docs/economics/cost-model.md— staged cost framework for CAPEX, OPEX, renewal, and funding logic.calculations/README.md— calculation standards and usage notes.calculations/hypergravity_sizing.py— dependency-free sizing calculator for circular terrestrial hypergravity concepts.calculations/coriolis_projectile_deflection.py— first-order Coriolis deflection estimator for thrown or kicked projectiles.calculations/railway_g_envelope.py— first-order railway g-envelope screening calculator.diagrams/README.md— planned figure set for proposal and review material.diagrams/figure-register.md— figure source register and rendering standard.
Current Development Logic
The repository is organized around staged feasibility, not immediate implementation.
- Define the research gap.
- Establish cautious scientific questions.
- Build reproducible physics and sizing models.
- Compare candidate concepts against common requirements.
- Identify the smallest useful demonstrator.
- Test measurement quality and confounders.
- Use low-risk biological payloads before human studies.
- Create a safety, ethics, and risk framework.
- Seek external expert review.
- Prepare a formal pre-feasibility proposal only if earlier stages justify it.
Documentation Standards
Contributions should:
- separate facts from hypotheses,
- state assumptions explicitly,
- use SI units consistently,
- show readable formulas before derived numbers,
- define all symbols directly after formulas,
- cite sources wherever possible,
- document uncertainty and limitations,
- avoid promotional language,
- identify safety and ethics constraints,
- make calculations reproducible,
- include stop/go decision points where appropriate.
See docs/documentation-style-guide.md.
AI Use and Transparency
AI tools may have been used to support drafting, restructuring, language editing, consistency checks, and review preparation. AI tools are not authors of this project. All scientific, engineering, safety, ethical, and bibliographic claims remain the responsibility of the human project maintainer(s) and contributors and must be verified against appropriate sources before being treated as evidence.
See docs/ai-use-and-transparency.md.
Contributing
Critical feedback is welcome. The most useful contributions at this stage identify weak assumptions, missing literature, calculation errors, confounders, safety issues, ethics concerns, or reasons why the concept should be narrowed, redirected, or stopped.
See CONTRIBUTING.md and CODE_OF_CONDUCT.md.
Citation
If you use or reference this project, please cite it using the metadata in CITATION.cff. The repository is exploratory and should not be cited as evidence that a facility is feasible, safe, or justified.
Disclaimer
This repository is an exploratory research and documentation project. It does not propose immediate construction, human exposure, clinical application, sports-training application, or operation of any facility. Any real-world implementation would require scientific review, engineering validation, safety assessment, ethical review, medical governance, regulatory compliance, and institutional oversight.
License
Documentation and diagrams are intended to be available under Creative Commons Attribution 4.0 International (CC BY 4.0) unless otherwise stated. Software and scripts are available under the MIT License unless otherwise stated. Future datasets, sensitive material, third-party material, or generated artifacts may use different licenses or access restrictions where appropriate.
See LICENSE.md.
Project: Hypergravity Habitat · Status: exploratory research documentation · License: see repository license and file-level notes