Open Source Aerospace // Engineering Knowledge Base

Navigate the
Stack.
Master the Physics.

Scattered across forums, pull requests, and documentation — the knowledge that powers open source drones is hard to find and harder to understand. We fix that.

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01
Deep Dives Published
∞
Topics Incoming
APM
Primary Focus
// 01

Deep Dives

// Navigation & Estimation
Kalman Filter in Ardupilot
How Ardupilot fuses IMU, GPS, barometer, and compass data through the Extended Kalman Filter to produce a reliable state estimate — even when individual sensors lie.
Live →
// Flight Control
PID Tuning Deep Dive
Proportional, integral, derivative — how Ardupilot's attitude and rate controllers are structured, and how to tune them without destroying hardware.
Coming Soon →
// Communication
MAVLink Protocol
The lightweight messaging protocol that connects your GCS to the flight controller. Packet structure, heartbeats, command sequences, and mission items.
Coming Soon →
// Hardware
IMU Sensor Fusion
Accelerometers, gyroscopes, and magnetometers — their individual failure modes and how Ardupilot uses multiple instances to stay airborne when one fails.
Coming Soon →
// Autonomy
Mission Planner & Scripting
From waypoint missions to Lua scripts — how Ardupilot handles autonomous behavior and how you can extend it without touching the core firmware.
Coming Soon →
// Failsafe & Safety
Failsafe Architecture
What happens when GPS drops, RC link fails, or battery reaches critical levels — the layered failsafe system that keeps flights recoverable.
Coming Soon →
// 02

About This Project

The open source aerospace community produces extraordinary engineering — but the knowledge lives in GitHub issues at 2am, half-finished forum threads, and documentation that assumes you already know what you're looking for.

This site is a knowledge distillation layer. Each week, we take one concept from the Ardupilot ecosystem, pull every relevant source — docs, PRs, forum answers, code comments — and synthesize it into something you can actually learn from.

Every topic ships with a podcast episode for lightweight understanding on the go, and an interactive mindmap for when you want to go deep. Built for engineers and serious hobbyists who want to understand, not just configure.

[POD]

Podcast First

Each topic has a companion podcast episode. Understand the concept on your commute, then go deep on the site.

[MAP]

Interactive Mindmaps

Hierarchical, expandable knowledge maps. Click into any branch for the full technical detail on that sub-topic.

[SRC]

Primary Sources

Synthesized from Ardupilot docs, forum discussions, pull requests, and code — not Wikipedia or generic AI summaries.

[EVL]

Evolving Knowledge Base

New deep dives published weekly. Topics grow in depth over time as the community adds context and corrections.