# E-flite Apprentice STS 1.5m (smart trainer)

> What are the dimensions of the E-flite Apprentice STS 1.5m?

- Category: RC planes › E-flite trainers and sport planes
- Kind: Modern device
- Basis: Secondary source: RaceDayQuads (copy of Horizon Hobby spec table) (copy of the maker's figures; the maker publishes none directly)
- Page: https://xemstudio.com/objects/e-flite-apprentice-sts-1-5m/ · JSON: https://xemstudio.com/api/geometry?object=e-flite-apprentice-sts-1-5m · Plain text: https://xemstudio.com/objects/e-flite-apprentice-sts-1-5m/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

## Overall (mm)

| length | width |
|---|---|
| 1080 | 1499 |

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

## Notes

- The Apprentice STS is E-flite's 1.5 m high-wing trainer (EFL3700 RTF / EFL3750 BNF Basic). The file models only the wingspan × length plan-view envelope.
- Height, wing area and prop size are not published on the listing used; the figures come from a retailer copy of Horizon Hobby's spec table, so the entry is marked secondary.
- True size, no printing tolerance added. Only published numbers are used; anything not published is said so.
- Secondary source: the numbers come from a retailer or magazine copy of the maker's specification.

## Sizes

| dimension | value |
|---|---|
| Wingspan | 59 in (1499 mm) |
| Length | 42.5 in (1080 mm) |
| Flying weight | 1500–2000 g |
| Motor | Brushless outrunner (installed); size/Kv not published on listing |
| Servos | (2) 13 g digital and (4) 37 g servos (installed) |
| Recommended battery | 3S 11.1 V 3200–4000 mAh LiPo, EC3 or IC3 connector |
| CG | 3.125 in (79 mm) behind wing leading edge at the fuselage |
| Height | not published |
| Wing area | not published |

## Where the files are

- RaceDayQuads (copy of Horizon Hobby spec table): [E-flite Apprentice STS 1.5m RTF Basic](https://www.racedayquads.com/products/efl370001-e-flite-apprentice-sts-1-5m-rtf-basic-smart-trainer-electric-airplane-1500mm-w-safe-technology) — web — Publisher's page; dimensions are facts

## Free STEP/STL (1 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/e-flite-apprentice-sts-1-5m/index.json

- e-flite-apprentice-sts-1-5m-plan-outline: [STEP](https://xemstudio.com/files/hardware/e-flite-apprentice-sts-1-5m/e-flite-apprentice-sts-1-5m-plan-outline.step) · [STL](https://xemstudio.com/files/hardware/e-flite-apprentice-sts-1-5m/e-flite-apprentice-sts-1-5m-plan-outline.stl) — Plan outline 1080 × 1499 mm, 1 mm reference thickness (height not published)

## Questions

**What battery fits the Apprentice STS?**

Horizon specifies a 3S 11.1 V 3200–4000 mAh LiPo with EC3 or IC3 connector.

**Where is the Apprentice STS CG?**

3.125 in (79 mm) back from the wing leading edge, measured at the fuselage.

## Fits with

- [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/)
- [E-flite Timber X 1.2m (STOL / 3D bush plane)](https://xemstudio.com/objects/e-flite-timber-x-1-2m/)
- [E-flite Valiant 1.3m (high-wing sport plane)](https://xemstudio.com/objects/e-flite-valiant-1-3m/)
- [E-flite Carbon-Z Cub SS 2.1m](https://xemstudio.com/objects/e-flite-carbon-z-cub-ss-2-1m/)