Hull shapes for surface effect ship with side walls and two modes of operation
US4708077A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1986 |
| Grant date | Nov 24, 1987 |
| Priority date | — |
| Expiry date | Apr 8, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T70/10
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The present invention concerns hull shapes for a surface effect ship, including a catamaran type supported structure with two side walls (100) connected by a center platform (200), able to operate either as a buoyant displacement vehicle, or as an air cushion supported vehicle, the side walls (100) confining, with two sealing devices (310, 320), the supporting center air cushion (c). The shape features are as follows: each side keel (100) includes a floor segment (110), an inner wall (120) facing the air cushion (c), and an outer side wall (130); the floor segment is angled upwardly with respect to a horizontal plane, the angle increasing continuously from the after part to the fore part of the keel until forming a deep V at the most fore part; the inner side wall (120) is nearly vertical in the after and fore part and presents a bulge in its upper center part (170); the outer side wall (130) evolves from a concavely curved surface to a planar surface resulting in optimum performance for both modes of operation either as an air cushion vehicle or as a buoyant displacement vehicle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.