README with the payload bay's limits and the publication rule; a Payload brief issue template

2026-10-05 07:56:55 -06:00
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+# TerraHawk, public
+
+This is the public side of one builder's TerraHawk FPV: a 3D-printed 4+1 quadplane (the
+Nomadium Robotics kit) flying ArduPilot, with a mapping camera in its belly and an outdoor
+charging dock. The build log and reference live at https://terrahawk.warehack.ing.
+
+This repository carries two things:
+
+- **Releases.** This build's own work as files you can use: our printable parts, the parameter
+  files, print jobs and firmware.
+- **Payload briefs.** Ideas for what else could ride in the belly bay, filed as issues.
+
+## What is never here
+
+The kit's STL files, and parts made from them in full, belong to Nomadium and are not
+published here or on the site. Get the kit from Nomadium:
+https://hangar.nomadiumrobotics.com/terrahawk-fpv
+
+## The payload bay
+
+The bay is in the belly, behind the battery, and the payload is its cover: nine M3 x 8
+countersunk screws hold a cover to heat-set inserts, and whatever is on that cover is the
+underside of the aircraft. The first payload is a MAPIR Survey3W mapping camera. The limits,
+estimated on 2026-10-02:
+
+| Limit | Value | Note |
+| --- | --- | --- |
+| Mass, trimmed with the payload aboard | up to about 185 g | The CG stays inside its envelope after a drop |
+| Mass, trimmed empty | up to about 273 g | The CG stays inside its envelope when loaded |
+| Drag, cover fitted | none | A flush cover costs nothing |
+| Drops | need the cargo door | The door is not on the first build |
+
+These are estimates. The [payload ideas](https://terrahawk.warehack.ing/explanation/payload-ideas/)
+page explains them, with twelve candidates and what each would cost.
+
+## Propose a payload
+
+Open an issue with the **Payload brief** template. Estimates are fine: say what you know. The
+fields are the ones the aircraft and its simulator need (mass, size, power, interface, the
+mission it flies, and whether it drops), so a brief filed today is not asked for again.
+
+Opening an issue needs an account on this server, and registration is closed for now. A public
+form on the site is planned.