Experimental Programme
Project: Hypergravity Habitat
Document type: staged experimental programme
Status: working document for pre-feasibility planning
Scope: transition from modelling to instrumentation, biological payloads, engineering demonstrators, and possible later human studies
1. Purpose
This document defines a staged experimental programme for the Hypergravity Habitat project. It translates the concept into a sequence of testable experiments and decision points.
The central question is:
Which experiments should be done first to determine whether sustained moderate hypergravity is scientifically useful and technically feasible?
The recommended answer is: begin with instrumentation and low-risk biological payloads, not human habitation.
2. Experimental Philosophy
The programme should follow these principles:
- Start with measurements before claims.
- Use non-human payloads before human studies.
- Include matched controls.
- Measure confounders continuously.
- Define stop/go criteria before experiments begin.
- Prefer narrow questions over broad exploratory claims.
- Treat negative or inconclusive results as useful.
3. Experimental Stages
| Stage |
Experiment class |
Main purpose |
| 0 |
modelling and literature |
define what is worth testing |
| 1 |
instrumentation-only |
prove measurement quality |
| 2 |
physical payload |
test acceleration, vibration, and control |
| 3 |
plant or microbial pilot |
test biological interpretability |
| 4 |
refined biological payload |
improve replication and controls |
| 5 |
guided or rotating engineering demonstrator |
test architecture-specific assumptions |
| 6 |
short human tolerance |
only after formal review |
| 7 |
repeated human exposure |
later-stage, if justified |
4. Stage 0 — Modelling and Review
Objective
Determine whether the research question is plausible and what parameter range should be tested.
Activities
- literature review,
- facility comparison,
- physics modelling,
- Coriolis modelling,
- risk and requirement definition,
- architecture comparison.
Output
- reviewable pre-feasibility package,
- candidate target gravity levels,
- candidate demonstrator path.
5. Stage 1 — Instrumentation-Only Experiment
Objective
Test whether the platform can measure and reproduce the intended environment.
Payload
- accelerometers,
- gyroscopes,
- vibration sensors,
- temperature and humidity sensors,
- data logger,
- dummy payload mass.
Measurements
- acceleration vector,
- angular rate,
- vibration spectrum,
- jerk,
- temperature,
- humidity,
- power stability,
- event log.
Success Criteria
- target exposure can be generated,
- sensor data are stable,
- confounders are measurable,
- repeated runs are comparable.
6. Stage 2 — Physical Payload Experiment
Objective
Test whether non-living payloads can remain stable and interpretable under sustained exposure.
Candidate Payloads
- fluid containers,
- particulate samples,
- mechanical test masses,
- instrumented sample racks,
- mock biological enclosure.
Research Questions
- Does fluid motion become a major confounder?
- Are payload mounts stable?
- Does vibration vary by payload location?
- Can environmental control be maintained?
7. Stage 3 — Plant Seedling Pilot
Objective
Test a low-risk biological system with visible gravity-sensitive outcomes.
Candidate Protocol
- grow matched seedling groups at 1 g and selected hypergravity level,
- use identical light, humidity, temperature, and substrate conditions,
- image root and shoot development,
- log acceleration and vibration continuously,
- compare growth, root angle, and morphology.
Primary Outputs
- germination time,
- root length,
- root angle,
- shoot length,
- survival,
- environmental stability,
- confounder log.
Stop/Go Criteria
Proceed only if environmental conditions are stable and data are interpretable.
8. Stage 4 — Microbial or Cell Pilot
Objective
Test whether compact biological systems produce reproducible results under controlled hypergravity exposure.
Candidate Payloads
- microbial growth curve,
- biofilm assay,
- algae growth,
- cell morphology assay,
- cytoskeleton staining after exposure.
Key Controls
- matched 1 g control,
- vibration logging,
- temperature logging,
- fluid-motion assessment,
- handling event log,
- contamination control.
9. Stage 5 — Engineering Demonstrator
Objective
Test architecture-specific assumptions after basic payload science and measurement quality are established.
Candidate Demonstrators
- circular guided cart,
- rail segment or ring test,
- maglev payload guideway,
- larger rotating platform.
Measurements
- acceleration stability,
- vibration,
- energy use,
- maintenance observations,
- control accuracy,
- safe shutdown,
- payload access.
10. Stage 6 — Short Human Tolerance Study
Status
Not an early-stage experiment.
Preconditions
- strong scientific rationale,
- technical safety case,
- ethics approval,
- medical screening,
- emergency response plan,
- conservative exposure protocol,
- independent review.
Possible Initial Questions
- acute comfort,
- vestibular response,
- movement tolerance,
- monitoring feasibility,
- recovery after short exposure.
Long-duration human habitation should remain a later-stage possibility only.
11. Experimental Controls
Every experiment should define:
- baseline condition,
- control group,
- exposure group,
- environmental controls,
- sensor calibration,
- sample handling,
- recovery period where relevant,
- exclusion criteria,
- analysis method.
12. Minimum Protocol Template
Each experiment should include:
- title,
- objective,
- hypothesis or research question,
- exposure condition,
- control condition,
- payload description,
- measurement plan,
- confounder-control plan,
- safety plan,
- data-management plan,
- stop criteria,
- success criteria,
- expected limitations.
13. Experimental Decision Logic
| Result |
Interpretation |
Next action |
| stable environment, no biological effect |
possible low effect size |
adjust target or organism |
| unstable environment |
engineering limitation |
improve platform before biology |
| measurable effect with confounders |
ambiguous |
improve controls |
| reproducible effect with controls |
promising |
repeat and expand |
| unsafe operation |
unacceptable |
stop and redesign |
14. Relationship to Other Documents
This document depends on:
docs/minimum-useful-demonstrator.md,docs/vibration-and-confounders.md,docs/data-management-plan.md,docs/safety-case-outline.md,docs/ethics-and-governance.md,docs/science/biology.md,docs/science/plant-science.md.
15. Preliminary Conclusion
The experimental programme should begin with a simple but rigorous payload experiment. The goal is not to prove the entire Hypergravity Habitat concept at once. The goal is to produce the first trustworthy dataset that tells reviewers whether the project deserves a next stage.