EP0221078B1 - Embarcations avec stabilisateurs d'assiette agissant par un bras de levier relativement long - Google Patents
Embarcations avec stabilisateurs d'assiette agissant par un bras de levier relativement long Download PDFInfo
- Publication number
- EP0221078B1 EP0221078B1 EP85904137A EP85904137A EP0221078B1 EP 0221078 B1 EP0221078 B1 EP 0221078B1 EP 85904137 A EP85904137 A EP 85904137A EP 85904137 A EP85904137 A EP 85904137A EP 0221078 B1 EP0221078 B1 EP 0221078B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- water
- wings
- stabilizers
- crafts
- trim
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
- B63B39/02—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by displacement of masses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
Definitions
- Objects of this invention are transversal and longitudinal trim stabilizers; as far as the longitudinal trim is concerned, if the ship allows it from a constructive point of view, the stabilizers act preferably through a sufficiently long lever-arm, in such a way as to drastically reduce needed and absorbed power.
- the stabilizing means both in transversal and longitudinal stabilization, are carried out by aerial wings (4) equipped with controls and/or ejectors (5), however placed, acting by means of a relatively long lever-arm, if necessary interlocked with an automatized, preferably gyroscopic, system.
- trim stabilizers are based on the idea of using or applying stabilizing means to aerial wings (4) and/ or to other means, including underwater ones, that are placed in a working position far from the ship's centre of gravity.
- the craft (1) with its steep keel (2) shows small hydro-dynamic wings (3) placed on both sides of the pointed hull, small wings which have only a limited part in the lifting of the craft.
- Transversal stabilization is given by the aerial wings (4) equipped with balancing flaps (5) and preferably equipped with outflow nozzles (6), for fluids under pressure, also placed on the mast, whereas longitudinal stabilization is guaranteed by depth planes (7) placed on the wings and/or by a nozzle (8) placed at the end of the craft, and/or by the nozzle (9) placed on the part under the water-line, and which is four- shaped, i.e. two for transversal stabilization and two for longitudinal stabilization.
- the water-craft 21, shown in figure 2 is equipped with aerial wings 24 with balancing flaps 25 and with small hydro-dynamic wings 23 placed along the keel, preferably keyed to a support beam 27.
- a different shape of the hydro-dynamic wings is possible, for example, one or more long and narrow wings, on condition that their position, with reference to the keel, be kept.
- the ejector nozzles and depth planes are not shown for reasons of simplicity.
- aerial stabilizing means 34 allows the air-cushion 38 to be kept very narrow and placed keel-wise, its main working purpose being that of keeping the water-craft raised above the surface of the water and the transversal stabilization being entrusted to the wings 24, either integrated or not with fluid outflow nozzles, for fluids under pressure (nozzles that are not shown in the picture), however arranged along a lever-arm, and the longitudinal stabilization to depth planes placed on the same wings and/or nozzles placed at the furthest end of the ship.
- the basic idea of the invention is that of achieving aerial stabilization by means of a large lever-arm and increasing this stabilization by means of nozzles or ejectors which can also be placed on the water-craft's mast.
- Aerial stabilization in particular allows many advantages to be obtained: for example, the reduction of problems connected with shape stability in customary naval crafts, as it allows the use of a greater coefficient of keenness in the case of increased speed, with the possibility of reducing the dipped part of the craft to a sort of blade which may cut the water whatever the shape of the wave profile (also in the case it be abeam) without having to stand the stress which a craft having to rely solely on the stability of its shape cannot avoid. Also in the case of water-crafts of the Hovercraft type, as mentioned before, the reduction of the air-cushion width allows that the waves be crossed obliquely, besides, of course, the reduction of air outflow from the skirt or tunic.
- aerial stabilization means allow that the water-craft - including "Surfs" - be given an aerial lift which may be utilized for different purposes, according to the size of the craft, keeping in mind that the weight of a water-craft increases according to the cube of its length. Allowing that the wings (4) may exceed relatively limited sizes, imposed for reasons of encumbrance, etc., the consequences are that, in the case of very small water-crafts, up to "Surfs", it is impossible to stress the excursions and the jumps out of the water, typical of offshores, and imitate the well-known "Flying Exocet", with short glides.
- the wings (4) In ships of a larger size, the wings (4) have prevalently stabilizing functions and represent a well outlined narrow support for balancing flaps (5) and depth planes (7) and/or fluid delivery nozzles (for air and/or water). It must furthermore be pointed out that the aforementioned stabilizing wings (4), in any case, if applied near to the prow, reduce the weight of the said prow, in the case of wavy sea, acting in the same way as the jib, flying jib and fore topmast stay-sails used to act.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Toys (AREA)
Abstract
Claims (11)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT48748/84A IT1179226B (it) | 1984-08-23 | 1984-08-23 | Natanti con stabilizzatori di assetto, che agiscono con braccio di leva relativamente lungo |
| IT4874884 | 1984-08-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0221078A1 EP0221078A1 (fr) | 1987-05-13 |
| EP0221078B1 true EP0221078B1 (fr) | 1990-04-25 |
Family
ID=11268370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP85904137A Expired EP0221078B1 (fr) | 1984-08-23 | 1985-08-13 | Embarcations avec stabilisateurs d'assiette agissant par un bras de levier relativement long |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0221078B1 (fr) |
| DE (1) | DE3577302D1 (fr) |
| IT (1) | IT1179226B (fr) |
| WO (1) | WO1986001482A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100441113B1 (ko) * | 2001-10-11 | 2004-07-21 | 한국해양연구원 | 내항성능 향상을 위한 공기챔버가 형성된 위그선 |
| KR100447116B1 (ko) * | 2001-12-18 | 2004-09-04 | 한국해양연구원 | 내항성능 향상을 위하여 트랜섬 선미가 구비된 위그선 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR754164A (fr) * | 1933-10-31 | |||
| GB717343A (en) * | 1951-02-10 | 1954-10-27 | Alcibiades Michael Doulghuridi | System of neutralizing the periodic oscillations of a body, such as the rolling of a ship |
| US3771485A (en) * | 1972-01-19 | 1973-11-13 | Flume Stabilization Syst | Quick-dump free-surface stabilizer |
-
1984
- 1984-08-23 IT IT48748/84A patent/IT1179226B/it active
-
1985
- 1985-08-13 WO PCT/IT1985/000029 patent/WO1986001482A1/fr not_active Ceased
- 1985-08-13 EP EP85904137A patent/EP0221078B1/fr not_active Expired
- 1985-08-13 DE DE8585904137T patent/DE3577302D1/de not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| WO1986001482A1 (fr) | 1986-03-13 |
| EP0221078A1 (fr) | 1987-05-13 |
| IT1179226B (it) | 1987-09-16 |
| DE3577302D1 (de) | 1990-05-31 |
| IT8448748A0 (it) | 1984-08-23 |
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| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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