# Plus (+) quad configuration

> What is a plus-configuration quadcopter?

- Category: Drone design › Drone frame layouts
- Kind: Standard part
- Basis: Design rules and figures from the cited sources; example geometry by Xem Studio
- Page: https://xemstudio.com/objects/plus-frame/ · JSON: https://xemstudio.com/api/geometry?object=plus-frame · Plain text: https://xemstudio.com/objects/plus-frame/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files Xem Studio Design License (free to use and sell from, not to redistribute as files: https://xemstudio.com/license/)
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

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

## Notes

- A plus quad has one motor at front, back and each side. Orientation is easier and it flies 'like an airplane', but props are more likely to appear in camera (Oscar Liang).
- 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.

## Sizes

| parameter | value or range | source |
|---|---|---|
| Arms | 4, on + axes | Oscar Liang |

## Where the files are

- Oscar Liang: [Types of multicopter](https://oscarliang.com/types-of-multicopter) — web — Publisher's page; dimensions are facts
- r/multicopter wiki (mirror): [Anatomy of a Multicopter](https://r.datuan.dev/r/multicopter/wiki/anatomy) — web — Publisher's page; dimensions are facts

## Free STEP/STL (1 parts, Xem Studio Design License, Xem Studio)

Index: https://xemstudio.com/files/hardware/plus-frame/index.json · license: https://xemstudio.com/files/hardware/plus-frame/LICENSE.md

- plus-frame-layout: [STEP](https://xemstudio.com/files/hardware/plus-frame/plus-frame-layout.step) · [STL](https://xemstudio.com/files/hardware/plus-frame/plus-frame-layout.stl) — plus frame layout: 220 mm motor-to-motor diagonal, 5 in props (discs show the swept area; arms and plate illustrative)

## Questions

**Why rare now?**

Props in camera view (Oscar Liang).

## Fits with

- [True X quad frame](https://xemstudio.com/objects/true-x-frame/)
- [Stretched X frame](https://xemstudio.com/objects/stretched-x-frame/)
- [Squashed (wide) X frame](https://xemstudio.com/objects/squashed-x-frame/)
- [Hybrid X frame](https://xemstudio.com/objects/hybrid-x-frame/)
- [Deadcat frame](https://xemstudio.com/objects/deadcat-frame/)
- [H frame](https://xemstudio.com/objects/h-frame/)