# Y6 coaxial

> What is a Y6 multirotor?

- 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/y6-coaxial/ · JSON: https://xemstudio.com/api/geometry?object=y6-coaxial · Plain text: https://xemstudio.com/objects/y6-coaxial/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

- Y6 puts two coaxial motors on each of three arms, giving hex-like lift in a tricopter footprint with no yaw servo (Oscar Liang).
- Coaxial props lose ~10-20% efficiency because the lower prop works in the upper's wash.
- The file is a reference example built by Xem Studio from the numbers above (Illustrative.). Sizes the sources do not fix are illustrative; scale the example to your own vehicle.

## Sizes

| parameter | value or range | source |
|---|---|---|
| Coaxial efficiency loss | ~10-20% | 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/y6-coaxial/index.json · license: https://xemstudio.com/files/hardware/y6-coaxial/LICENSE.md

- y6-coaxial-layout: [STEP](https://xemstudio.com/files/hardware/y6-coaxial/y6-coaxial-layout.step) · [STL](https://xemstudio.com/files/hardware/y6-coaxial/y6-coaxial-layout.stl) — y6 frame layout: 550 mm motor-to-motor diagonal, 12 in props (discs show the swept area; arms and plate illustrative)

## Questions

**Why lower efficiency?**

Lower prop runs in moved air (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/)