Redline

A static-fire ground station for rocket test days. Free, offline, one HTML file.

Redline reads your test stand live, warns you when a channel crosses a limit you set, then goes back through the data looking for the things that quietly wreck an impulse number: a clipped load cell, a drifting zero, a burn that got cut off. If it can't stand behind the result, it says so instead of printing a clean-looking number anyway.

I'm Nico, 16, and I built this because I kept seeing student teams fire an engine once and then trust whatever number fell out of a spreadsheet, even when the data was quietly broken. It's for student and amateur teams who have a load cell, a laptop, and no budget.

Try it

The whole tool is one file. Download redline.html, open it in Chrome or Edge, and it runs with no internet.

• Click Start Sim Stand, then Start Recording, then Ignite (Sim) to watch a fire with no hardware.
• Or open the Import CSV tab and drop in a log from a past fire. It reads US and EU number formats and auto-detects columns.
• Live telemetry over USB uses the Web Serial API (Chrome or Edge, desktop) from the included ESP32 firmware.

What's in here

• redline.html the whole tool as a single offline file, engine bundled in. This is the one to hand people.
• redline-console.html the same interface, but loads the engine from redline-core.js. Keep the two together.
• redline-core.js the analysis engine. Pure JavaScript, no dependencies, runs the same in the browser and in Node.
• index.html the project website.
• redline-demo-clean.csv and redline-demo-bad.csv sample fires for testing the importer.
• test-fuzz.cjs, test-console.cjs headless checks.

What it actually checks

Before it classifies anything, Redline runs a set of checks that come from ways real data goes wrong: calibration provenance, unit conflicts, load cells that disagree, zero drift, timing gaps, saturation, truncation, non-physical spikes. It labels every result verified, needs review, or not defensible, and keeps an assumption ledger of every assumption it made and where it came from. Every report carries a SHA-256 hash of the exact input.

A note on trust

The alarm is advisory only. It is not an abort or safety-of-life system, and the analysis is a decision aid, not a replacement for an engineer's eyes.

Status

Still being built, by one person. It gets better every time someone sends me a file that breaks it. If you run static fires, send me a CSV from a past one and I'll send back a full report of your own data.

Nico Turienzo Otero nikolai.turienzo.edu@gmail.com

License

MIT. See LICENSE.