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Frame size vs prop size
What frame size do I need for 3, 5 or 7 inch props? · Standard part · basis: Design rules and figures from the cited sources; example geometry by Xem Studio
Also called: frame size prop size, drone frame size chart, what size props for 220mm frame, 5 inch frame size, wheelbase vs prop, fpv frame sizes, 250 class quad props, 7 inch frame size, quad frame diagonal
Exact dimensions. True size, with no printing tolerance added.
- sizes
- 13 in table
Notes
- Frame size is the diagonal motor-to-motor distance; it caps prop diameter because props need tip clearance (Grepow; ArduPilot). Grepow maps 210-250 mm to 5 in props.
- ArduPilot suggests about half an inch of clearance tip-to-tip and to the frame; overlapping tips hurt efficiency and cause vibration.
- 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 size vs prop size size chart
| parameter | value or range | source |
|---|---|---|
| 65-75 mm | whoops | Grepow |
| 90-120 mm | 2 in | Grepow |
| 120-150 mm | 3 in | Grepow |
| 160-200 mm | 4 in | Grepow |
| 210-250 mm | 5 in | Grepow |
| 250-330 mm | 6 in | Grepow |
| 280-330 mm | 7 in | Grepow |
| 330-380 mm | 8 in | Grepow |
| 355-405 mm | 9 in | Grepow |
| 405-455 mm | 10 in | Grepow |
| Prop tip clearance | ~0.5 in | ArduPilot |
| 3 in diagonal (other source) | 85-100 mm | Unmanned Tech Shop |
| 5 in (other source) | 210-220 mm | Unmanned Tech Shop |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Grepow | What size FPV drone should I get? | web | Publisher's page; dimensions are facts |
| ArduPilot | Archived: Advanced MultiCopter Design | web | Publisher's page; dimensions are facts |
| Unmanned Tech Shop | FPV drone propeller size guide: how to choose props | 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
| frame-size-prop-size-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 |
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.Plain text: sheet.txt · JSON: /api/geometry?object=frame-size-prop-size

Fits with
Questions
What is 'wheelbase'?
Diagonal motor-to-motor distance (Grepow).





