Library › Drone design › Drone frame layouts ·

Tricopter (Y3)

Name: Tricopter (Y3) dimension sheet
Creator: Xem Studio
License: https://creativecommons.org/licenses/by/4.0/

How does a tricopter yaw? · Standard part · basis: Design rules and figures from the cited sources; example geometry by Xem Studio

Also called: tricopter, y3 tricopter, tri copter, tilting tail motor, tricopter yaw servo, 3 motor drone, tricopter vs quad, tricopter frame

Exact dimensions. True size, with no printing tolerance added.

sizes: 1 in table

Notes

A tricopter has three motors about 120 deg apart; the rear motor tilts on a servo for yaw, which gives good yaw authority without cutting thrust (Oscar Liang).
It is less stable, its tail mechanics are crash-prone, and ArduPilot calls the type outdated.

Tricopter size chart

parameter	value or range	source
Arm spacing	~120 deg	Oscar Liang

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

Oscar Liang	Types of multicopter	web	Publisher's page; dimensions are facts
ArduPilot	Archived: Advanced MultiCopter Design	web	Publisher's page; dimensions are facts

Xem scan

File coming

No downloadable true-size file yet: the published figures do not fix the whole shape, and Xem never guesses a number. A measured scan is planned; request it and it moves up.

Let your AI pull this. Add https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.

Set it up →

Plain text: sheet.txt · JSON: /api/geometry?object=tricopter-y3

Schematic, not to scale.