EP0032223A1 - Anordnung eines als Flossenkiel oder Schwert dienenden Körpers an einem Segelboot - Google Patents

Anordnung eines als Flossenkiel oder Schwert dienenden Körpers an einem Segelboot Download PDF

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Publication number
EP0032223A1
EP0032223A1 EP80108000A EP80108000A EP0032223A1 EP 0032223 A1 EP0032223 A1 EP 0032223A1 EP 80108000 A EP80108000 A EP 80108000A EP 80108000 A EP80108000 A EP 80108000A EP 0032223 A1 EP0032223 A1 EP 0032223A1
Authority
EP
European Patent Office
Prior art keywords
fin keel
boat
sword
halves
section
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Withdrawn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
EP80108000A
Other languages
German (de)
English (en)
French (fr)
Inventor
Paul Mader
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
Publication of EP0032223A1 publication Critical patent/EP0032223A1/de
Withdrawn legal-status Critical Current

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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 
    • B63B41/00—Drop keels, e.g. centre boards or side boards ; Collapsible keels, or the like, e.g. telescopically; Longitudinally split hinged keels
    • B63B2041/003—Collapsible keels, or the like, e.g. telescopically; Longitudinally split hinged keels
    • B63B2041/006—Telescopically collapsible keels

Definitions

  • the invention relates to an arrangement of the type specified in the preamble of claim 1.
  • the keel surfaces In the case of hulls with a shallow draft, the keel surfaces (sword surfaces) must be made relatively large and deep in order to generate the necessary upward windward lift even in the lower speed ranges. At higher speeds, the area can only be reduced in sword boats by lifting the sword and thus the induced drag can be reduced. If the yacht has a fixed keel, the resulting buoyancy is limited by the largest possible angle of attack of the entire boat, since with increasing this angle the induced drag of the boat increases disproportionately. At 2 ° drift angle, the induced drag increases by 14% of the pure form drag 4 ° by 34%, at 8 ° by 8 0 % and at 1 0 ° by 106%. The smallest angle of attack still generating sufficient buoyancy is approximately 4 °.
  • the force generated by the keel or sword also has a heeling effect, since it complements the heeling force of the sail.
  • the wind power component causing the drift is now completely or partially compensated for by the lateral buoyancy component generated by the fin keel or the sword, so that the drift is reduced.
  • the angle between the course and the longitudinal axis of the ship is reduced to 0 ° by the mode of action. As a result, the boat body's drag decreases.
  • the rear part of the body serving as a fin keel or sword consists of a trim flap which is attached to the front part of the body by a hinge and can be swiveled to port or starboard.
  • a trim tab has the disadvantage that the horizontal longitudinal section profile of the body serving as a fin keel or sword is strongly arched in the rear third when the trim tab is pivoted out. This is unfavorable for the buoyancy and increases the resistance.
  • the invention has for its object to provide an arrangement of the type specified in the preamble of claim 1, which is characterized in that it generates a greater lift due to the asymmetrical profile in a relatively small area. It has an angle of attack without the entire boat being brought up to the course. The buoyancy and the angle of attack are adjustable.
  • the boat body 10 shown in Figs. 1 and 2 of S egelboots is provided with a fin keel serves as a two-piece body 12 consisting of two successively arranged in the direction of parts is 14 and 16.
  • the forward portion 14 is symmetrical about the vertical longitudinal median plane 18 of the hull and has a teardrop-shaped neutral cross-sectional profile in each of the cross-sectional plane 2-2 of the figure. 1 parallel plane, advantageously tapered downwards.
  • the rear part 16 of the body 12 forming the fin keel is arranged on the leeward side of the central plane 18, has an approximately triangular cross-sectional profile and approaches the front fin keel part 14 with its front side 20, so that it supplements its teardrop-shaped profile to an asymmetrical buoyancy profile.
  • this two-part fin keel therefore exerts a buoyancy component, as indicated by the arrow 22, on the hull 10 in the windward direction.
  • the part 16 of the fin keel tapers downwards in a favorable embodiment. It is set in the embodiment shown in FIGS. 1 and 2 while driving so that its lower end is flush with the lower end of part 14.
  • the sailboat would take course 24 under the influence of the component of the wind power acting transversely to its longitudinal axis with an angle of attack of 4 °.
  • the part 16 creates the necessary angle of attack of the profile, so that the buoyancy is also generated when the course of the boat coincides with the longitudinal axis of the ship.
  • the rear part 16 of serving as a fin keel body 12 is of a two sword-hochziebarer halves 16 and 26 are formed, see FIG. 3, of which only the leeward half is lowered, respectively, while the other in an S chwertkasten 28, Fig. 6, is pulled up.
  • the lowered half - designated 16 in Figures 1 and 2 - pull up and lower the other half 26.
  • the two halves 16 and 26 of the rear part of the fin keel are slidably guided and provided with appropriate drives.
  • FIG. 5 shows an arrangement in which the sword case 29 is also able to accommodate the front part 14 ′ of the fin keel, so that it is not rigidly attached to the hull, as in the embodiment of FIG. 6, but is guided in the sword case 29 in a sliding manner . You can therefore lower the fin keel more or less as required and pull it all the way up when driving upwind.
  • the sword box 29 slidably receives the front part 14 and the two halves 16 and 26 of the rear part of the fin keel. In the embodiment shown in FIG. 5, cables are used to drive these individual parts.
  • a rope pulley 32 is mounted, over which a rope 34 runs, which extends upwards through the sword box and runs at the upper end via deflection rollers 36 to drivable rope pulleys. If the front part 14 of the fin keel is lifted out of the lowered position shown in FIG. 5 by pulling the rope 34 tight, then its foot 30 takes the respectively lowered half of the rear part - this is half 26 in the position shown in FIG. 5 up with.
  • a pull cable 38 is fastened to each half 16 and 26 of the rear part of the fin keel, with the aid of which each of the two halves 16, 26 can be pulled up or lowered by itself.
  • Fig. 4 an embodiment of the fin keel is shown in which there is a flow-through gap between the two halves 16 and 26 of the rear part of the body 12 finds. Accordingly, the mutually facing corners of the triangular cross-sectional profile of the halves 16 and 26 are rounded. The cross-sectional profile of each of the two halves 16 and 26 can also be neutral.
  • drives by racks and pinions and hydraulic devices can also be provided.
  • the dimensions of the body 12 can be dimensioned smaller than an undivided fin keel for a given hull 10, because its effect is enhanced by the force component 22 generated by it. For this reason, the point of application of the force component 22 is also close to the ship's hull, which has the advantage that the force 22 tries to heel the boat hull 1o to a lesser extent.
  • FIG. 7 illustrates a cross section through the fin keel shown in FIG. 5 and through the sword box to illustrate the cable drives for the halves 16 and 26 of the rear part of the fin keel.
  • Rope sheaves 40 are mounted at the bottom of the sword case, over which the ropes 38 run. These ropes are guided over upper sheaves 42 which can be driven in one direction or the other. The ropes engage halves 16 and 26 at the top. For this purpose, the ropes run through holes 44, which are arranged in the outer walls of the slideways, in which the halves 16 and 26 are slidably guided.
  • the outside of the sword case is covered by walls 46.
  • the two downwardly tapering halves 16 and 26 have shoulders 48 on the outside, which can rest against the bottom of the hull 10 on both sides of the slot provided in the bottom of the sword case, in order to limit the downward stroke of the halves 16 and 26.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Toys (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
EP80108000A 1980-01-15 1980-12-17 Anordnung eines als Flossenkiel oder Schwert dienenden Körpers an einem Segelboot Withdrawn EP0032223A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803001279 DE3001279A1 (de) 1980-01-15 1980-01-15 Anordnung eines als flossenkiel oder schwert dienenden koerpers an einem segelboot
DE3001279 1980-01-15

Publications (1)

Publication Number Publication Date
EP0032223A1 true EP0032223A1 (de) 1981-07-22

Family

ID=6092095

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80108000A Withdrawn EP0032223A1 (de) 1980-01-15 1980-12-17 Anordnung eines als Flossenkiel oder Schwert dienenden Körpers an einem Segelboot

Country Status (4)

Country Link
EP (1) EP0032223A1 (da)
DE (1) DE3001279A1 (da)
DK (1) DK408881A (da)
WO (1) WO1981001990A1 (da)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2547265A1 (fr) * 1983-06-13 1984-12-14 Noir Jean Louis Derive pivotante formant aileron de bord d'attaque amovible pour equiper les gouvernails de voiliers
EP2125502A1 (en) * 2007-03-09 2009-12-02 Magnasail, LLC Apparatus and method to optimize sailing efficiency
CN110682994A (zh) * 2019-07-29 2020-01-14 浙江海洋大学 一种船舶易行装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3248580A1 (de) * 1982-12-30 1984-07-05 Dieter 8242 Bischofswiesen Frank Finne fuer surfbrett
DE3509229A1 (de) * 1985-03-14 1986-09-25 Dieter 8242 Bischofswiesen Frank Finne
DE4340028C2 (de) * 1993-11-24 1997-07-10 Zuehlke Ernst W Dipl Ing Fh Abdriftverminderndes System für windgetriebene Schiffe
DE19861049A1 (de) * 1998-12-28 2000-07-13 Hans Rottler Drift und Krängungsausgleich für Segelwasserfahrzeuge

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE376152C (de) * 1920-06-22 1923-05-24 Emil Palmblad Schwert fuer Segelschiffe

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1924871A (en) * 1931-06-26 1933-08-29 Ludington Charles Townsend Boat keel
FR1225240A (fr) * 1958-06-09 1960-06-29 H C Stuelcken Sohn Safran, en particulier de gouvernail de navire, aileron de stabilisation
FR1570966A (da) * 1968-06-20 1969-06-13
US3538879A (en) * 1968-09-30 1970-11-10 Richard D Fuerle Sailboat centerboard
US3690284A (en) * 1971-04-15 1972-09-12 Stadt E G Scheepwert Nv Van De Rudder or keel for a wind and/or power propelled vessel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE376152C (de) * 1920-06-22 1923-05-24 Emil Palmblad Schwert fuer Segelschiffe

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2547265A1 (fr) * 1983-06-13 1984-12-14 Noir Jean Louis Derive pivotante formant aileron de bord d'attaque amovible pour equiper les gouvernails de voiliers
EP2125502A1 (en) * 2007-03-09 2009-12-02 Magnasail, LLC Apparatus and method to optimize sailing efficiency
EP2125502A4 (en) * 2007-03-09 2013-02-20 Magnasail Llc APPARATUS AND METHOD FOR OPTIMIZING THE EFFICIENCY OF SAILING
US9731799B2 (en) 2007-03-09 2017-08-15 Magnasail, Llc Apparatus and method to optimize sailing efficiency
US10597124B2 (en) 2007-03-09 2020-03-24 Magnasail, Llc Apparatus and method to optimize sailing efficiency
US11117642B2 (en) 2007-03-09 2021-09-14 Magnasail, Llc Apparatus and method to optimize sailing efficiency
CN110682994A (zh) * 2019-07-29 2020-01-14 浙江海洋大学 一种船舶易行装置

Also Published As

Publication number Publication date
WO1981001990A1 (en) 1981-07-23
DE3001279A1 (de) 1981-07-23
DK408881A (da) 1981-09-14

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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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AK Designated contracting states

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Effective date: 19820120

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18D Application deemed to be withdrawn

Effective date: 19850630