# RFB X-113 Am aerofoil boat (Lippisch, 1970)

> What are the dimensions of the RFB X-113 Am?

- Category: Ground-effect craft › Lippisch reverse-delta craft
- Kind: Modern device
- Basis: Secondary source: Wikipedia (copy of the maker's figures; the maker publishes none directly)
- Page: https://xemstudio.com/objects/rfb-x-113-am/ · JSON: https://xemstudio.com/api/geometry?object=rfb-x-113-am · Plain text: https://xemstudio.com/objects/rfb-x-113-am/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 | height |
|---|---|---|
| 8430 | 5890 | 2070 |

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

## Notes

- The X-113 Am was a single-seat composite reverse-delta craft built by Rhein-Flugzeugbau from the Collins X-112 concept.
- The file is an 8.43 × 5.89 × 2.07 m box (Jane's 1974–75 via Wikipedia). Hameed 2019 tabulates 2.0 m height and 360 kg MTOW.
- 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 |
|---|---|
| Length | 8.43 m (27 ft 8 in) |
| Wingspan | 5.89 m (19 ft 4 in) |
| Height | 2.07 m (6 ft 9 in) |
| Empty weight | 255 kg |
| Gross weight | 345 kg |
| Engine | Nelson H63-CP flat-four, 30 kW (40 hp) derated from 36 kW |
| Propeller | 2-blade wooden tractor, 1.17 m (3 ft 10 in) diameter |
| Cruise speed | 80 km/h |
| Take-off speed | 40 km/h |
| Efficient cruise height | 175 mm (7 in) |
| Ground-effect limit | approx. 3 m (50% of span) |
| First flight | October 1970 |

## Where the files are

- Wikipedia: [RFB X-113](https://en.wikipedia.org/wiki/RFB_X-113) — web — Publisher's page; dimensions are facts

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

Index: https://xemstudio.com/files/hardware/rfb-x-113-am/index.json

- rfb-x-113-am-envelope: [STEP](https://xemstudio.com/files/hardware/rfb-x-113-am/rfb-x-113-am-envelope.step) · [STL](https://xemstudio.com/files/hardware/rfb-x-113-am/rfb-x-113-am-envelope.stl) — Envelope 8430 × 5890 × 2070 mm (Real craft: overall length × wingspan × overall height as published)

## Questions

**How low does the X-113 cruise?**

Its efficient cruise height was 175 mm (7 in); ground effect fades at about 3 m, half the span.

## Fits with

- [Collins X-112 aerofoil boat (Lippisch, 1963)](https://xemstudio.com/objects/collins-x-112-aerofoil-boat/)
- [RFB X-114 aerofoil boat (Lippisch, 1977)](https://xemstudio.com/objects/rfb-x-114/)