# Collins X-112 aerofoil boat (Lippisch, 1963)

> What are the dimensions of the Collins X-112?

- 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/collins-x-112-aerofoil-boat/ · JSON: https://xemstudio.com/api/geometry?object=collins-x-112-aerofoil-boat · Plain text: https://xemstudio.com/objects/collins-x-112-aerofoil-boat/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 |
|---|---|
| 7620 | 4270 |

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

## Notes

- The X-112 was Alexander Lippisch's first reverse-delta 'Aerofoil Boat', built at Collins Radio and described in Lippisch's US patent 3,190,582.
- Height is not published, so the file models only a 7.62 × 4.27 m plan-view envelope (data from Jane's All the World's Aircraft 1964–65 via Wikipedia).
- The patent text was not readable in this research pass, so no patent geometry is recorded. 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 | 25 ft 0 in (7.62 m) |
| Wingspan | 14 ft 0 in (4.27 m) |
| Height | not published |
| Wing area | 110 sq ft (10 m²) |
| Empty weight | 370 lb (168 kg) |
| Gross weight | 710 lb (322 kg) |
| Engine | 1 × 25 hp (19 kW), tractor, fixed-pitch propeller |
| Maximum speed | 77 mph (124 km/h) in free flight |
| Take-off speed | 35–38 mph (55–61 km/h) |
| Planform | reverse (inverse) delta: straight unswept leading edge |
| First flight | 1963 |

## Where the files are

- Wikipedia: [Collins X-112 (after Jane's All the World's Aircraft 1964–65)](https://en.wikipedia.org/wiki/Collins_X-112) — web — Publisher's page; dimensions are facts

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

Index: https://xemstudio.com/files/hardware/collins-x-112-aerofoil-boat/index.json

- collins-x-112-aerofoil-boat-plan-outline: [STEP](https://xemstudio.com/files/hardware/collins-x-112-aerofoil-boat/collins-x-112-aerofoil-boat-plan-outline.step) · [STL](https://xemstudio.com/files/hardware/collins-x-112-aerofoil-boat/collins-x-112-aerofoil-boat-plan-outline.stl) — Plan outline 7620 × 4270 mm, 1 mm reference thickness (height not published)

## Questions

**What wing shape does the X-112 use?**

A reverse (inverse) delta: triangular in plan with a straight, unswept leading edge.

## Fits with

- [RFB X-113 Am aerofoil boat (Lippisch, 1970)](https://xemstudio.com/objects/rfb-x-113-am/)
- [RFB X-114 aerofoil boat (Lippisch, 1977)](https://xemstudio.com/objects/rfb-x-114/)