Library › Drone design › Drone frame layouts ·

Frame arm thickness

Name: Frame arm thickness dimension sheet
Creator: Xem Studio
License: https://creativecommons.org/licenses/by/4.0/

How thick should FPV frame arms be? · Standard part · basis: Design rules and figures from the cited sources; example geometry by Xem Studio

Also called: arm thickness, fpv arm thickness, 5mm arms, 6mm arms, frame resonance, carbon arm, frame stiffness, arm width motor mount

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

sizes: 5 in table

Notes

Thicker arms resist crashes and push resonance higher but add weight (UAVModel).
5 mm is standard for 5 in freestyle; 6 mm adds 15-20 g and moves resonance to 240-280 Hz. Arms narrower than 12 mm at the motor can flex into a 40-60 Hz wobble (UAVModel).
The file is a reference example built by Xem Studio from the numbers above (Reference 5-inch build: 220 mm diagonal within Grepow's 210-250 mm class for 5 in props.). Sizes the sources do not fix are illustrative; scale the example to your own vehicle.

Frame arm thickness size chart

parameter	value or range	source
4 mm	3 in / ultralight 5 in	UAVModel
5 mm	5 in freestyle/racing; ~180-220 Hz	UAVModel
6 mm	+15-20 g; ~240-280 Hz	UAVModel
8 mm	7 in long range	UAVModel
Arm width at motor, 5 in	13-14 mm	UAVModel

Where the files are

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

UAVModel blog	FPV Frame Geometry: Deadcat vs True X vs Squashed X (2026 guide)	web	Publisher's page; dimensions are facts
UAVModel blog	FPV Drone Frame Selection Guide: Geometry, Materials, and Arm Design	web	Publisher's page; dimensions are facts

Free files

★ Free files 1 parts. Xem Studio design: free to use, print and sell things from; not to be republished as files. Xem Studio Design License. index.json

arm-thickness-layout

true x frame layout: 220 mm motor-to-motor diagonal, 5 in props (discs show the swept area; arms and plate illustrative)

STEP · STL

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=arm-thickness