# Tickbirds — Autonomous Maintenance Robotics

> Purpose-shaped robotics for acid-aerosol environments. Named after oxpeckers.

Formal designation: **Autonomous Maintenance Platform (AMP).** Industrial Schleimfarm of 4–8 km length carries hundreds to thousands of units depending on sub-unit count.

## Why robotic, not human

Venusian cloud deck = continuous H₂SO₄ aerosol at ~1 bar, −10 to +15 °C. Every exterior surface accumulates sulfur. Every pipe run develops internal fouling. Every cultivation chamber requires monitoring + harvesting + cleaning.

Platform of 4–8 km length = surface area tens of km² + internal pipe runs hundreds of km.

**Human EVA at scale is uneconomic.** Acid-resistant seals, limited consumables, breach risk in acid aerosol is non-trivial. Person in EVA inspects ~100 m of hull per hour. **A crab-form crawler moves continuously, does not tire, and costs less than the suit it replaces.**

Also: corridors are 1.4 m wide. A humanoid form factor with joints, seams, and surface area would be ruinously expensive to maintain. **Each type is purpose-shaped: form is the output of task + environment.**

## Three form factors

### Exterior hull crawlers — crab-form

| Spec | Value |
|---|---|
| Width | ~400 mm |
| Coating | Ceramic |
| Locomotion | Multiple magnetic/adhesive legs |
| Payload | Optical sensors, ultrasonic thickness gauges, small acid-wash nozzle |
| Typical density | 1 per 500–1,000 m² of exterior hull |
| Deployment on 8 km platform | 4,000–8,000 units + spares in recessed cradles |

**Crab form = convergent solution for exterior work.** Low profile reduces wind drag. Wide stance stabilizes on curved surfaces. Articulated legs handle uneven terrain (weld seams, repair patches, biofilm buildup). All while enduring continuous acid exposure.

### Interior pipe inspectors — worm-form

| Spec | Value |
|---|---|
| Diameter | 30 mm |
| Length | 100–400 mm (varies by payload) |
| Locomotion | Peristaltic |
| Sensors | Optical, chemical, flow — modular by head module |

**Worm form follows pipe interior diameter.** At 30 mm fits standard platform pipes (40–200 mm). Modular head means single drive unit reconfigures by swapping module.

### Cultivation chamber harvesters — arm-form

Fixed-track rolling collection arms on rails above cultivation chambers. **Not autonomous in the same sense as crawlers and inspectors** — operate on fixed infrastructure following programmed harvest cycles.

Arm extends into chamber, collects accumulated slime from culture surface, routes to internal transfer system.

**Human intervention required when slime does something the program didn't expect** — unusual viscosity, unexpected culture behavior, contamination. Happens regularly enough that harvest automation is described as "100% autonomous" by the manufacturer and **"Pyramidic"** by the crew who monitor it.

## Automation gradient

| Subsystem | Automation level | Consequence of failure |
|---|---|---|
| Cultivation chambers | Most automated — closed-loop environmental control, daily confirmatory inspections only | Lost product; expensive but contained |
| Atmospheric systems | Semi-automated — alerts and waits when outside envelope | Progressive: pressure loss, contamination spread, potential cascade |
| Acid processing unit | Least automated — automation presents options, human decides | Range from lost batch (expensive) to corrosive breach (hull penetration by concentrated acid) |

**If every human left the platform, the chambers would continue producing for weeks without intervention.**

## Accumulation and personality

Tickbirds are tools. They are also maintained by people who live with them for years. Individual units accumulate repair history, behavioral quirks, modifications. **A crawler that consistently drifts left on the starboard hull section acquires a note in the maintenance log.** After a decade, crew members who have never read the log know about it anyway — someone told them.

→ Long form: `7. Archive/long-form/tickbird-maintenance.md`

→ `interior-architecture.md`, `ablative-biofilm.md`, `autoslime-gen6.md`, `venusian-cloudcraft-design.md`