Plus (+) quad configuration — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/plus-frame/  (sheet CC BY 4.0; files Xem Studio Design License, https://xemstudio.com/license/)
Basis: Design rules and figures from the cited sources; example geometry by Xem Studio
Catalog version: 2026-10-20

Sizes: see table below
- 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.

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

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Oscar Liang: Types of multicopter — web — Publisher's page; dimensions are facts — https://oscarliang.com/types-of-multicopter
- r/multicopter wiki (mirror): Anatomy of a Multicopter — web — Publisher's page; dimensions are facts — https://r.datuan.dev/r/multicopter/wiki/anatomy

Free files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/plus-frame/index.json
API: https://xemstudio.com/api/geometry?object=plus-frame