# RC plane outrunners (2212, 2216, 2826, 3508, 4110, 6374) and car inrunners (540 / 3650, 4274, 1/8 scale)

> What are the dimensions of a 540 brushless motor?

- Category: Electronics › RC & drones
- Kind: Modern device
- Basis: Maker spec pages (Castle Creations, Hobbywing, SunnySky, iFlight, Flipsky); T-Motor via retailer copies (marked)
- Page: https://xemstudio.com/objects/rc-plane-and-car-motors/ · JSON: https://xemstudio.com/api/geometry?object=rc-plane-and-car-motors · Plain text: https://xemstudio.com/objects/rc-plane-and-car-motors/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses
- 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

- Car 540-class (36 mm can): Ø36 × about 52–53 mm, mounts with 2 × M3 on 25 mm (Castle states it). Shafts differ by model: 3.175 mm (Hobbywing 3650) or 5 mm (Castle 1410, XeRun 3652) — check yours.
- 1/8 scale: Hobbywing 4274 Ø42 × 74, 4268 Ø42 × 68, Ø5 shaft; Castle 1515 Ø40 (41.4 over fins) × 75.4 with 3 and 4 holes at 25 mm.
- Plane outrunners ship with a cross ('X') mount; its hole spacing appears only in maker drawings, so it is not listed. SunnySky X2212 Ø27.5 × 30 with a 3.175 shaft and 5 mm prop adapter.
- Robotics / e-skate 6374: Ø63.4 × 77 body, Ø8 shaft with a 3 × 1.5 key (Flipsky); mount screws M4, pattern not published.
- The 3650 and 4274 envelopes use the 2 × M3 on 25 pattern Castle publishes for 36 mm cans; Hobbywing does not state its pattern, so check before drilling.

## Sizes

| motor | type | dia_mm | length_mm | shaft_mm | mount | weight_g |
|---|---|---|---|---|---|---|
| Castle 1410 (540 class) | car inrunner | 36 | 52.7 | 5 × 21 | 2 × M3 on 25 | 237 |
| Hobbywing QuicRun 3650 G2 | car inrunner | 36 | 52.8 | 3.175 | None | 190 |
| Hobbywing XeRun 3652 SD G2 | car inrunner | 36 | 52.5 / 56 | 5 × 15 | None | 192 |
| Hobbywing EZRun 4274 | 1/8 car | 42 | 74 | 5 | None | 418 |
| Hobbywing EZRun 4268 | 1/8 car | 42 | 68 | 5 | None | 343 |
| Castle 1515 | 1/8 car | 40 (41.4 fins) | 75.4 | 5 × 20 | 3 and 4 holes at 25 | None |
| SunnySky X2212 | plane outrunner | 27.5 | 30 | 3.175 | cross mount | 57 |
| SunnySky X2216 V3 | plane outrunner | 27.7 | 34 | None | cross mount | 68 |
| T-Motor AT2826 long shaft | plane outrunner | 35.2 | 69.5 | 5 | None | 175 |
| T-Motor MN3508 (retailer copy) | multirotor | 41.8 | 26.5 | 4 | None | 82 |
| SunnySky X4110S | outrunner | 48.2 | 30.5 | 4 | None | 149 |
| Flipsky 6374 | robotics / e-skate | 63.4 | 77 (102 overall) | 8 keyed | M4 | 860 |

## Where the files are

- Castle Creations (spec via dealer): [1410 3800 kV](https://es.wrekd.com/products/castle-creations-060-0066-00-motor-1410-3800kv-4-pole-sensored-brushless-motor) — web — Publisher's page; dimensions are facts
- Hobbywing: [QuicRun 3650 SD G2](https://www.hobbywing.com/en/products/quicrun-3650-sd-g259) — web — Publisher's page; dimensions are facts
- Hobbywing: [EZRun 4274 / 4268](https://www.hobbywing.com/en/products/ezrun-4274--4268253) — web — Publisher's page; dimensions are facts
- Hobbywing Direct: [XeRun 3652 SD G2](https://hobbywingdirect.com/products/xerun-3652sd-motor) — web — Publisher's page; dimensions are facts
- RC Visions (Castle spec): [Castle 1515](https://rcvisions.com/products/castle-creations-1515-sensored-4-pole-brushless-motor-2200kv) — web — Publisher's page; dimensions are facts
- FlyingTech (SunnySky spec): [SunnySky X2212](https://flyingtech.co.uk/product/sunnysky-x2212-13-980kv-ii-2-4s-multirotor-brushless-motor/) — web — Publisher's page; dimensions are facts
- BuddyRC (SunnySky spec): [SunnySky X2216 V3](https://buddyrc.com/products/sunnysky-x2216) — web — Publisher's page; dimensions are facts
- LIGPOWER (T-Motor spec): [AT2826 long shaft](https://ligpower.com/product/at2826-long-shaft-fixed-wing-motor.html) — web — Publisher's page; dimensions are facts
- GetFPV (T-Motor spec copy): [MN3508](https://www.getfpv.com/tiger-motor-mn3508-16-700kv.html) — web — Publisher's page; dimensions are facts
- ReadyMadeRC (SunnySky spec): [X4110S](https://www.readymaderc.com/products/details/86945-sunnysky-xs-high-power-x4110s-brushless-motor-400kv) — web — Publisher's page; dimensions are facts

## Free STEP/STL (5 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/rc-plane-and-car-motors/index.json

- car-motor-36x52.7-castle-1410: [STEP](https://xemstudio.com/files/hardware/rc-plane-and-car-motors/car-motor-36x52.7-castle-1410.step) · [STL](https://xemstudio.com/files/hardware/rc-plane-and-car-motors/car-motor-36x52.7-castle-1410.stl) — 36 mm car motor envelope (Castle 1410): Ø36 × 52.7, Ø5 × 21 shaft, 2 × M3 on 25
- car-motor-36x52.8-3650: [STEP](https://xemstudio.com/files/hardware/rc-plane-and-car-motors/car-motor-36x52.8-3650.step) · [STL](https://xemstudio.com/files/hardware/rc-plane-and-car-motors/car-motor-36x52.8-3650.stl) — 3650 car motor envelope: Ø36 × 52.8, Ø3.175 shaft (hole pattern assumed 2 × M3 on 25, see notes)
- car-motor-42x74-4274: [STEP](https://xemstudio.com/files/hardware/rc-plane-and-car-motors/car-motor-42x74-4274.step) · [STL](https://xemstudio.com/files/hardware/rc-plane-and-car-motors/car-motor-42x74-4274.stl) — 4274 1/8 car motor envelope: Ø42 × 74, Ø5 shaft (hole pattern assumed 2 × M3 on 25, see notes)
- car-motor-plate-2xm3-25: [STEP](https://xemstudio.com/files/hardware/rc-plane-and-car-motors/car-motor-plate-2xm3-25.step) · [STL](https://xemstudio.com/files/hardware/rc-plane-and-car-motors/car-motor-plate-2xm3-25.stl) — Car motor plate: 2 × M3 on 25 mm, slotted ±3 mm for gear mesh
- outrunner-2212-envelope: [STEP](https://xemstudio.com/files/hardware/rc-plane-and-car-motors/outrunner-2212-envelope.step) · [STL](https://xemstudio.com/files/hardware/rc-plane-and-car-motors/outrunner-2212-envelope.stl) — 2212 plane outrunner envelope (SunnySky X2212): Ø27.5 × 30, Ø3.175 shaft

## Questions

**What are 540 motor mounting holes?**

2 × M3 on 25 mm (Castle 1410); the can is Ø36 mm.

## Fits with

- [FPV drone motor sizes: 1104 to 3115, shaft, prop thread and mount patterns](https://xemstudio.com/objects/fpv-drone-motors/)
- [540 size brushed DC motor: Ø35.8 × 50.0 mm, 2 × M3 on 25](https://xemstudio.com/objects/dc-motor-540-size/)
- [RC LiPo battery sizes: ROAR 2S hardcase, shorty, saddle, 4S brick; drone 4S / 6S and 3S 2200 packs; connectors](https://xemstudio.com/objects/rc-lipo-batteries/)