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394 lessons across 11 departments, from swerve geometry to the Impact Award essay. Written by a high-school student who needed this and could not find it.

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Chief Delphi
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© 2026 LearnFRC. Built by Jahaan Pardhanani. Not affiliated with or endorsed by FIRST®.Privacy Terms394 lessons / 11 departments© 2026

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drawer / Community

CD

Chief Delphi

The largest FRC community forum, where teams share technical knowledge, designs, and code.

also calledCD

Official source

where you actually meet CD

Chief Delphi is where FRC's institutional knowledge actually lives. Almost every problem you hit in build season — a gearbox that keeps eating itself, a CAN bus dropping devices, a swerve module nobody can zero — already has a thread with photos and a real answer. It is also where Open Alliance build threads and post-season design releases get posted.

Lessons that use CD

Free and structured, and none of them need an account to read.

1lesson

Mechanical, Build & Pneumatics
Advanced Techniques & Case Studies

Case Studies: Learning From Open Alliance Robots

Reverse-engineer elite mechanisms (6328 A-frame pivot, 1678 flywheel shooter, 2910 dead-axle pivot) and use Open Alliance CAD/code to accelerate your own design.open

Filed next to it

the jargon travels in packs

Community

Open Alliance

A group of teams that publicly document their build season in real time to share knowledge with the community.

Community

Onshape

A free, cloud-based CAD platform popular in FRC for collaborative robot design.

General

Build Season

The intense period after Kickoff (historically ~6 weeks) when teams design and build their robot before competitions.

Competition & Game

Autonomous

The opening segment of a match where the robot operates entirely on pre-programmed code with no driver input.

Chief Delphi is one of 70 entries in the catalogue. The guides are where these words get used in order, instead of one at a time.

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