DE3939435A1 - Damping pitching motion of yacht - involves elastically flexible float attached to stern end of keel - Google Patents

Damping pitching motion of yacht - involves elastically flexible float attached to stern end of keel

Info

Publication number
DE3939435A1
DE3939435A1 DE19893939435 DE3939435A DE3939435A1 DE 3939435 A1 DE3939435 A1 DE 3939435A1 DE 19893939435 DE19893939435 DE 19893939435 DE 3939435 A DE3939435 A DE 3939435A DE 3939435 A1 DE3939435 A1 DE 3939435A1
Authority
DE
Germany
Prior art keywords
yacht
keel
damping
pitching motion
elastically flexible
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.)
Withdrawn
Application number
DE19893939435
Other languages
German (de)
Inventor
Walter Loidl
Bernd Otto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE19893939435 priority Critical patent/DE3939435A1/en
Publication of DE3939435A1 publication Critical patent/DE3939435A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B41/00—Drop keels, e.g. centre boards or side boards ; Collapsible keels, or the like, e.g. telescopically; Longitudinally split hinged keels
    • 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
    • B63B39/06—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water
    • 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
    • B63B39/06—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water
    • B63B2039/067—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water effecting motion dampening by means of fixed or movable resistance bodies, e.g. by bilge keels

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Toys (AREA)
  • Wind Motors (AREA)

Abstract

The device is used for damping the pitching motion of a sailing or engine driven yacht (1). The yacht is of the type which is fitted with a keel (2) and the damping device is in the form of a float or flap (3) attached to the stern end of the keel. The float or flap is elastically flexible and in addition to damping the pitching motion it converts some of: the energy of the pitching motion to aid the propulsion of the yacht. The device acts automatically and needs no external power to drive it. USE - Yacht with device to reduce pitching in rough seas.

Description

Die als Stabilisierungsflosse bezeichnete Erfindung soll vor allem bei seegehenden Yachten die Longitudinalbewegung (Stampfen) verringern und die Energie möglichst in eine Vortriebsenergie umwandeln.The invention referred to as the stabilizing fin is intended especially in the case of sea-going yachts, the longitudinal movement (Stomp) and reduce the energy into one if possible Convert propulsive energy.

An dem festen Ballastteil am unteren Ende des Kiels ist aus elastischem Kunststoff (oder Gummi) eine, sich hinten verbreiternde Flosse angebracht. Die Flosse ist nach dem Befestigungsteil elastisch, weiter hinten wieder durch integrierte Verstärkungen versteift.On the fixed ballast part at the bottom of the keel Made of elastic plastic (or rubber), one at the back widening fin attached. The fin is after that Fastening part elastic, further back through stiffened integrated reinforcements.

Die stärkste Stampfbewegung kommt zweifelsohne bei direktem Kurs gegen den Wellengang zustande. Sowohl bei Fahrt unter Motor als auch beim Segeln hart am Wind wird in beiden Fällen ein starker Geschwindigkeitsverlust fest­ stellbar sein, bei Fahrt unter Segeln ist ein weiterer Nachteil durch das Schlagen der Segel gegeben. Eine gewisse Dämpfung ist also in jedem Fall von Vorteil.The strongest pounding movement comes without a doubt direct course against the waves. Both at Driving under motor as well as when sailing is hard on the wind in both cases there is a strong loss of speed be adjustable, when sailing under sail is another Disadvantage given by hitting the sail. A certain one Damping is always an advantage.

Die Flosse sollte möglichst groß und möglichst weit vom Drehpunkt der Longitudinalbewegung entfernt sein, um ein großes Dämpfungsmoment zu erhalten. Nicht zuletzt wird in diesem Fall das Dämpfungsmoment aber auch von der Feder­ konstanten des elastischen Flossenteils abhängig sein.The fin should be as large as possible and as far as possible from The fulcrum of the longitudinal movement must be a to get great damping torque. Last but not least, in in this case, the damping moment also from the spring constant of the elastic fin part.

Ebenso ist diese Federkonstante bzw. die Vorspannung für die mögliche Ausnutzung der gespeicherten Energie für den Vortrieb verantwortlich. Kompromisse je nach Hauptaugen­ merk werden also angebracht sein.This spring constant or the preload is also for the possible utilization of the stored energy for the Jacking responsible. Compromises depending on the main eyes Merk will be appropriate.

Versuchen zufolge, die derzeit mit Flossenantrieben gemacht werden, zeigen auf, daß gerade für den Bereich von Geschwindigkeiten, in dem sich Kielyachten bewegen, der Flossenantrieb nicht zu vernachlässigen ist.According to attempts, currently made with fin drives show that just for the range of Speeds in which keel yachts move, the Fin drive is not to be neglected.

Claims (3)

1. Stabilisierungsflosse für Kielyachten, zur Dämpfung der Longitudinalbewegung (Stampfen), ist dadurch gekennzeichnet, daß die Flosse selbsttätig, ohne mechanischen Antrieb, wirkt.1. stabilizing fin for keel yachts, for damping the longitudinal movement (pounding), is characterized in that the fin acts automatically, without mechanical drive. 2. Stabilisierungsflosse nach Anspruch 1, ist dadurch gekennzeichnet, daß die Flosse elastisch ist.2. stabilizing fin according to claim 1, is characterized in that the fin is elastic. 3. Stabilisierungsflosse nach Anspruch 1, ist dadurch gekennzeichnet, daß ein Teil der Dämpfungsenergie in Vortriebsenergie umgewandelt wird.3. stabilizing fin according to claim 1, is characterized in that part of the damping energy in propulsion energy is converted.
DE19893939435 1989-11-29 1989-11-29 Damping pitching motion of yacht - involves elastically flexible float attached to stern end of keel Withdrawn DE3939435A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19893939435 DE3939435A1 (en) 1989-11-29 1989-11-29 Damping pitching motion of yacht - involves elastically flexible float attached to stern end of keel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19893939435 DE3939435A1 (en) 1989-11-29 1989-11-29 Damping pitching motion of yacht - involves elastically flexible float attached to stern end of keel

Publications (1)

Publication Number Publication Date
DE3939435A1 true DE3939435A1 (en) 1991-06-06

Family

ID=6394406

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19893939435 Withdrawn DE3939435A1 (en) 1989-11-29 1989-11-29 Damping pitching motion of yacht - involves elastically flexible float attached to stern end of keel

Country Status (1)

Country Link
DE (1) DE3939435A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014217227A1 (en) * 2014-08-28 2016-03-03 Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR) Fin stabilizer and watercraft
CN113734372A (en) * 2021-09-14 2021-12-03 薛明刚 Ship power fin and ship

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014217227A1 (en) * 2014-08-28 2016-03-03 Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR) Fin stabilizer and watercraft
EP2993118A1 (en) 2014-08-28 2016-03-09 SKF Blohm + Voss Industries GmbH Fin stabilizer and water vessel
US9745031B2 (en) 2014-08-28 2017-08-29 Skf Blohm + Voss Industries Gmbh Fin stabilizer and watercraft
CN113734372A (en) * 2021-09-14 2021-12-03 薛明刚 Ship power fin and ship

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Legal Events

Date Code Title Description
8139 Disposal/non-payment of the annual fee