DE3933398A1 - Rope for towing fishing net through water etc. - comprises inner section receiving traction forces and outer section minimising resistance - Google Patents

Rope for towing fishing net through water etc. - comprises inner section receiving traction forces and outer section minimising resistance

Info

Publication number
DE3933398A1
DE3933398A1 DE19893933398 DE3933398A DE3933398A1 DE 3933398 A1 DE3933398 A1 DE 3933398A1 DE 19893933398 DE19893933398 DE 19893933398 DE 3933398 A DE3933398 A DE 3933398A DE 3933398 A1 DE3933398 A1 DE 3933398A1
Authority
DE
Germany
Prior art keywords
rope
fishing net
section
traction forces
outer 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Withdrawn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
DE19893933398
Other languages
German (de)
Inventor
Marek Dr Ing Tegel
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.)
Telefunken Systemtechnik AG
Original Assignee
Telefunken Systemtechnik AG
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 Telefunken Systemtechnik AG filed Critical Telefunken Systemtechnik AG
Priority to DE19893933398 priority Critical patent/DE3933398A1/en
Publication of DE3933398A1 publication Critical patent/DE3933398A1/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Withdrawn legal-status Critical Current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 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/56—Towing or pushing equipment
    • B63B21/66—Equipment specially adapted for towing underwater objects or vessels, e.g. fairings for tow-cables
    • B63B21/663—Fairings
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/14—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable
    • D07B1/147—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable comprising electric conductors or elements for information transfer
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B5/00—Making ropes or cables from special materials or of particular form
    • D07B5/005—Making ropes or cables from special materials or of particular form characterised by their outer shape or surface properties

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Ropes Or Cables (AREA)

Abstract

A rope is for towing a body through a medium, e.g. a flight body by means of an aircraft or a fishing net, by means of a boat. The rope consists of an inner rope section that receive, the traction tension, and of an outer section that surrounds the inner one. The profile of the outer section minimises resistance. ADVANTAGE - The rope minimises the resistance coefficient while enabling a transmission of considerable traction forces.

Description

Die Erfindung betrifft ein Seil gemäß dem Oberbegriff von Anspruch 1.The invention relates to a rope according to the preamble of Claim 1.

In der Praxis tritt vielfach das Problem auf, einen Kör­ per mit Hilfe eines Seiles durch ein Medium zu ziehen. Beispiele hierfür sind in der Luftfahrt das Schleppen ei­ nes Flugkörpers, beispielsweise eines Segelflugzeuges, oder in der Meerestechnik das Schleppen von Bojen oder eines Fischnetzes. Üblicherweise werden Seile mit rundem Querschnitt verwendet, wobei für einen Zug in Längsrichtung des Seiles der runde Querschnitt optimal ist. Praktisch tritt dieser Fall jedoch äußerst selten auf, da grund­ sätzlich zumindest teilweise das Schleppseil auch in Quer­ richtung angeströmt wird. Bei Queranströmungen weist ein Seil mit rundem Querschnitt einen verhältnismäßig hohen Widerstandsbeiwert auf, der erhebliche Reibungsverluste mit sich bringt.In practice, the problem often occurs, a body by pulling through a medium with the help of a rope. Examples of this are towing in aviation a missile, for example a glider, or towing buoys in marine engineering or a fishnet. Ropes are usually round Cross section used, being for a train in the longitudinal direction the round cross-section of the rope is optimal. Practically However, this case occurs extremely rarely because of additionally, at least partially, the tow rope also in cross direction is flowing. With cross-flows shows a Rope with a round cross-section a relatively high Resistance coefficient on that with considerable friction losses brings itself.

Der Erfindung liegt daher die Aufgabe zugrunde, ein Schlepp­ seil der eingangs genannten Art zu schaffen, das eine er­ hebliche Verminderung des Widerstandsbeiwertes bei einer gleichzeitigen Übertragung von erheblichen Zugkräften er­ möglicht.The invention is therefore based on the object of a tow to create rope of the type mentioned, the one he Significant reduction in the drag coefficient at one simultaneous transmission of considerable tensile forces possible.

Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Seil aus einem die Zugspannung aufnehmenden inneren Seil­ teil und einem dieses Seilteil umgebenden äußeren Seilteil mit einem widerstandsgünstigen Profil besteht.The object is achieved in that the Rope from an inner rope absorbing the tension part and an outer rope part surrounding this rope part with a resistant profile.

Neben einer wesentlichen Verminderung des Strömungswider­ standes ist es von Vorteil das innere die Zugspannung aufnehmende Seilteil im Querschnitt des äußeren Seilteiles vor dem Angriffspunkt der hydrodynamischen Kräfte anzu­ ordnen, da das Seil dann den Richtungsänderungen der Strö­ mung nach Art einer Windfahne folgen kann.In addition to a significant reduction in flow resistance it is of advantage that the inner tension receiving rope part in cross section of the outer rope part before the point of application of the hydrodynamic forces arrange, because the rope then changes the direction of the currents can follow in the manner of a wind vane.

Eine Ausgestaltung der Erfindung geht dahin, daß das äußere Seilteil auch zur Aufnahme eines zusätzlichen elektrischen Kabels dient. Ein derartiges Seil kann vorteilhafterweise als Energieleitung oder Nachrichtenleitung für Unterwasser­ fahrzeuge oder als Schleppseil für nachgeschleppte Antennen verwendet werden.One embodiment of the invention is that the outer Rope part also for receiving an additional electrical Cable. Such a rope can advantageously as power line or communication line for underwater vehicles or as a tow rope for towed antennas be used.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt, und zwar zeigt die einzige Figur ein ange­ strömtes Schleppseil im Querschnitt. In the drawing is an embodiment of the invention shown, and that the only figure shows a ange streaming tow rope in cross section.  

Das von einer Strömung mit einer Geschwindigkeit V ange­ strömte Schleppseil 1 besteht aus einem äußeren Seilteil 2 mit einem widerstandsarmen Profil, vorzugsweise in Form eines Tragflächenprofils, und einem inneren die Zugspannung aufnehmenden Seilteil 3. Das innere Seilteil 3 ist in dem äußeren Seilteil 2 vor dem Angriffspunkt der hydrodynam­ ischen Kräfte eingebettet. Zusätzlich enthält das äußere Seilteil 2 ein Kabel 4, das zur Übertragung von elektrischer Energie oder von Nachrichten dienen kann.The tow rope 1 flowing from a flow at a speed V consists of an outer rope part 2 with a low-resistance profile, preferably in the form of an airfoil profile, and an inner rope part 3 absorbing the tension. The inner rope part 3 is embedded in the outer rope part 2 before the point of application of the hydrodynamic forces. In addition, the outer cable part 2 contains a cable 4 , which can be used to transmit electrical energy or messages.

Claims (3)

1. Seil zum Schleppen eines Körpers durch ein Medium, vor­ zugsweise eines Flugkörpers mittels eines Flugzeuges oder eines Fischnetzes mittels eines Wasserfahrzeuges, dadurch gekennzeichnet, daß das Seil (1) aus einem die Zugspannung aufnehmenden inneren Seilteil (3) und einem dieses Seilteil (3) umgebenden äußeren Seilteil (2) mit einem widerstands­ günstigen Profil besteht.1. Rope for towing a body through a medium, preferably before a missile by means of an aircraft or a fishnet by means of a watercraft, characterized in that the rope ( 1 ) from an inner rope part absorbing the tension ( 3 ) and one of these rope part ( 3 ) surrounding outer rope part ( 2 ) with a low-resistance profile. 2. Seil nach Anspruch 1, dadurch gekennzeichnet, daß das innere Seilteil (3) im Querschnitt des äußeren Seilteiles (2) vor dem Angriffspunkt der hydrodynamischen Kräfte ange­ ordnet ist.2. Rope according to claim 1, characterized in that the inner rope part ( 3 ) in the cross section of the outer rope part ( 2 ) is arranged before the point of application of the hydrodynamic forces. 3. Seil nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das äußere Seilteil (2) zur Aufnahme eines zusätzlichen elektrischen Kabels (4) dient.3. Rope according to claim 1 or 2, characterized in that the outer rope part ( 2 ) serves to receive an additional electrical cable ( 4 ).
DE19893933398 1989-10-06 1989-10-06 Rope for towing fishing net through water etc. - comprises inner section receiving traction forces and outer section minimising resistance Withdrawn DE3933398A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19893933398 DE3933398A1 (en) 1989-10-06 1989-10-06 Rope for towing fishing net through water etc. - comprises inner section receiving traction forces and outer section minimising resistance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19893933398 DE3933398A1 (en) 1989-10-06 1989-10-06 Rope for towing fishing net through water etc. - comprises inner section receiving traction forces and outer section minimising resistance

Publications (1)

Publication Number Publication Date
DE3933398A1 true DE3933398A1 (en) 1991-04-18

Family

ID=6390958

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19893933398 Withdrawn DE3933398A1 (en) 1989-10-06 1989-10-06 Rope for towing fishing net through water etc. - comprises inner section receiving traction forces and outer section minimising resistance

Country Status (1)

Country Link
DE (1) DE3933398A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9015213U1 (en) * 1990-11-06 1991-01-17 Seidl, Christian, 8000 München Rope for hang gliders, paragliders or similar.
US5367971A (en) * 1992-03-12 1994-11-29 Australian Sonar Systems Pty Ltd. Towed acoustic array
EP2771722A4 (en) * 2011-10-28 2015-10-14 Global Dynamics Inc Steerable fairing string
US9791582B2 (en) 2014-12-05 2017-10-17 Gx Technology Canada Ltd. Segmented-foil divertor
US10488541B2 (en) 2015-10-15 2019-11-26 Ion Geophysical Corporation Dynamically controlled foil systems and methods
US10507893B2 (en) 2016-02-16 2019-12-17 Gx Technology Canada Ltd. Ribbon foil depressor
US11077920B2 (en) 2018-10-09 2021-08-03 Ion Geophysical Corporation Modular foil system for towed marine array

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9015213U1 (en) * 1990-11-06 1991-01-17 Seidl, Christian, 8000 München Rope for hang gliders, paragliders or similar.
US5367971A (en) * 1992-03-12 1994-11-29 Australian Sonar Systems Pty Ltd. Towed acoustic array
EP2771722A4 (en) * 2011-10-28 2015-10-14 Global Dynamics Inc Steerable fairing string
US9632195B2 (en) 2011-10-28 2017-04-25 Gx Technology Canada Ltd. Steerable fairing string
US10254422B2 (en) 2011-10-28 2019-04-09 Gx Technology Canada Ltd. Steerable fairing string
US11181655B2 (en) 2011-10-28 2021-11-23 Gx Technology Canada Ltd Steerable fairing string
US9791582B2 (en) 2014-12-05 2017-10-17 Gx Technology Canada Ltd. Segmented-foil divertor
US10488541B2 (en) 2015-10-15 2019-11-26 Ion Geophysical Corporation Dynamically controlled foil systems and methods
US10507893B2 (en) 2016-02-16 2019-12-17 Gx Technology Canada Ltd. Ribbon foil depressor
US11325680B2 (en) 2016-02-16 2022-05-10 Gx Technology Canada Ltd. Adjustable buoyancy foil
US11077920B2 (en) 2018-10-09 2021-08-03 Ion Geophysical Corporation Modular foil system for towed marine array

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