EP0374743A2 - Empennage pour un projectile d'entraînement sous-calibré du type flèche - Google Patents

Empennage pour un projectile d'entraînement sous-calibré du type flèche Download PDF

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Publication number
EP0374743A2
EP0374743A2 EP89123175A EP89123175A EP0374743A2 EP 0374743 A2 EP0374743 A2 EP 0374743A2 EP 89123175 A EP89123175 A EP 89123175A EP 89123175 A EP89123175 A EP 89123175A EP 0374743 A2 EP0374743 A2 EP 0374743A2
Authority
EP
European Patent Office
Prior art keywords
wings
tail unit
additional
unit according
wing
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Withdrawn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
EP89123175A
Other languages
German (de)
English (en)
Other versions
EP0374743A3 (fr
Inventor
Rainer Himmert
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.)
Diehl Verwaltungs Stiftung
Original Assignee
Diehl GmbH and Co
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 Diehl GmbH and Co filed Critical Diehl GmbH and Co
Publication of EP0374743A2 publication Critical patent/EP0374743A2/fr
Publication of EP0374743A3 publication Critical patent/EP0374743A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
    • F42B10/02—Stabilising arrangements
    • F42B10/04—Stabilising arrangements using fixed fins
    • F42B10/06—Tail fins

Definitions

  • the invention relates to a tail unit for a sub-caliber training arrow projectile with wings fixed radially on the projectile shaft.
  • Tail units of sub-caliber arrow projectiles should have the lowest possible air resistance. If you shoot at target boards - especially with the corresponding exercise version - it is very difficult to observe the target placement because of the relatively small bullet holes.
  • the invention is based on the object of proposing an empennage which, with only a slight deterioration in the drag coefficient - compared to combat ammunition - leaves sufficiently large holes in the targets for the observation of the hits.
  • the invention solves this problem in that the wings have additional wings transverse to their main axis.
  • the hole created by the practice arrow in the target corresponds approximately to the diameter of the circle on which the additional wings lie.
  • this large hole is achieved according to the solution according to claim 1, although a free distance is provided between the ends of adjacent additional wings. Because the remaining intermediate webs in the target plate are then so narrow that - depending on the plate material, such as wood - they are broken out or bent open.
  • claims 3 and 4 contribute to a favorable drag coefficient, without adversely affecting the effect of the arrow on the target board in accordance with claim 1.
  • the inclined surfaces of the additional wings promote the breaking off of the intermediate webs by introducing resulting forces into the crushable or splinterable plate material.
  • the additional wings consist of a high-strength spring steel. This has the required stability when firing and when passing through the target plate.
  • tail unit according to claim 1 An at least equivalent variant of the tail unit according to claim 1 is present according to claim 7. Due to the length offset of the double-wing, one-piece additional wings, the installation of the additional wings in the openings of the wings is quick and easy without mutual hindrance.
  • a practice arrow projectile creates a large, easily recognizable hole even in a target plate with a weather-resistant, high-toughness target material, such as nonwoven.
  • the arrangement of the additional flights ensures that the target material is completely cut out, as with a closed profile (ring). Nevertheless, the air resistance increases only comparatively slightly and is above all considerably below the impermissibly high air resistance of a suitably closed profile.
  • An empennage 1 consists of a tubular empennage body 2 with six wings 3. These have sharpened edges 4 in a known manner.
  • the additional wings 6 are arranged — in relation to the radial length of the wing 3 approximately at a third distance 5 in the direction of an empennage body 2.
  • a free distance 11 between the ends 18 of adjacent additional wings 6 is approximately 40-50% of the radial length of the wing 3.
  • tail unit 1 Aluminum alloy for the tail unit 1 and high-strength spring band steel for the additional wings 6.
  • a radius 14 of a hole 17 in the target plate 12 thus corresponds approximately to the distance 15 of the additional wing 6 from the tail axis 7.
  • Essential to the invention is the aerodynamically favorable arrangement of the additional wings 6 in relation to the tail unit 2.
  • the mutual spacing 11 of the additional wings 6 from one another and in relation to the tail unit 2 ensures that the drag coefficient of the tail unit is not significantly greater than one Tail 1 without additional wing 6.
  • a tail unit 20 - in contrast to the exemplary embodiment described above - has the additional wings 6, which are offset longitudinally by a distance 21.
  • the distance 21 is parallel to the tail axis 7.
  • the ends 18 of the additional wings 6 lie on a line 22, see FIGS. 4 and 5. Their mutual spacing - measured at right angles to the tail axis 7 - is therefore zero.
  • Two additional wings 6 are provided for each wing 3. 5, these two additional wings 6 consist of a piece 24.
  • the piece 24 can be inserted into an opening 25 of the wing 3 in the direction of arrow 26 - without being impeded by the adjacent additional wings 6.
  • a line of symmetry 18 it has a nose 27 with double-sided material overhang 28 opposite the wing 3 and a recess 35, see FIG. 7.
  • Bevels 36, 37 on the piece 24 on one side allow assembly in the direction of arrow 38 in the opening 25.
  • the asymmetrically arranged bevels 36, 37 lying diagonally opposite one another on a line 19 allow a minimal axial play 39 between the piece 24 and the wing 3.
  • the secure fixing of the piece 24 in the wing 3 is simplified. Faultless assembly and positioning of the piece 24 in the installed position according to FIGS. 5, 6 is therefore also possible in a simple manner for the riveting process.
  • the material overhang 28 is plastically deformed on both sides in the manner of the known riveting process.
  • the piece 24 rests under prestress on the end faces 29 (FIGS. 5 and 6) of the opening 25 and has a positive fit at 30.
  • This double-sided positive connection in conjunction with the pretension, ensures the secure fixation of the pieces 24 when firing, during the flight of the projectile and in the target.
  • the tail unit 20 of a sub-caliber training projectile produces a perfectly recognizable hole in the case of a very resistant target material, namely non-woven ("non-woven").
  • the lobes, not shown, remaining in the target material when the tail unit 1 is used between the wing beats are - in the tail unit 20 by the in the projection due to the
  • the zero distance on line 22 can be varied within narrow limits.
  • the ends 18 can overlap slightly; they can also have a small free space. The free distance depends on the breaking or tear strength of the target material.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Toys (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
EP19890123175 1988-12-19 1989-12-14 Empennage pour un projectile d'entraínement sous-calibré du type flèche Withdrawn EP0374743A3 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3842730 1988-12-19
DE3842730 1988-12-19
DE3933100 1989-10-04
DE3933100A DE3933100A1 (de) 1988-12-19 1989-10-04 Leitwerk fuer ein unterkalibriges uebungspfeilgeschoss

Publications (2)

Publication Number Publication Date
EP0374743A2 true EP0374743A2 (fr) 1990-06-27
EP0374743A3 EP0374743A3 (fr) 1990-12-27

Family

ID=25875338

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890123175 Withdrawn EP0374743A3 (fr) 1988-12-19 1989-12-14 Empennage pour un projectile d'entraínement sous-calibré du type flèche

Country Status (3)

Country Link
US (1) US4978088A (fr)
EP (1) EP0374743A3 (fr)
DE (1) DE3933100A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4034879A1 (de) * 1990-11-02 1991-07-04 Bongers Hermann Ringausschnitt-duesenleitwerk
US5668347A (en) * 1996-09-13 1997-09-16 The United States Of America As Represented By The Secretary Of The Army Kinetic energy projectile with fin leading edge protection mechanisms
US6699091B1 (en) * 1999-11-04 2004-03-02 Jon A. Warner Hand-launchable underwater projectile toy
US6655293B1 (en) * 2000-06-29 2003-12-02 General Dynamics Ordnance And Tactical Systems, Inc. Fin-stabilized ammunition
SE517003C2 (sv) * 2000-09-05 2002-04-02 Bofors Defence Ab Sätt att öka skottvidden vid fenförsedda artelleriprojektiler samt sådan projektil
US7624683B2 (en) * 2001-08-23 2009-12-01 Raytheon Company Kinetic energy rod warhead with projectile spacing
US8033890B2 (en) 2005-05-18 2011-10-11 Warner Jon A Self-propelled hydrodynamic underwater toy
US7781709B1 (en) 2008-05-05 2010-08-24 Sandia Corporation Small caliber guided projectile
US8418623B2 (en) 2010-04-02 2013-04-16 Raytheon Company Multi-point time spacing kinetic energy rod warhead and system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR556302A (fr) * 1921-12-23 1923-07-17 Perfectionnements aux projectiles à empennage
FR1556631A (fr) * 1967-03-17 1969-02-07
FR2353824A1 (fr) * 1976-06-01 1977-12-30 Rheinmetall Gmbh Projectile a portee limitee
FR2561764A1 (fr) * 1984-03-21 1985-09-27 Losfeld Christian Projectile economique pour mortier

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH147200A (fr) * 1930-02-19 1931-05-31 Louis Verger Henri Etui pour montre ou autre article.
FR817907A (fr) * 1936-04-03 1937-09-14 Stabilisateur à fluide forcé
FR1200005A (fr) * 1948-02-05 1959-12-17 Soc Tech De Rech Ind Empennage déployant
US3015269A (en) * 1958-12-19 1962-01-02 Jr James H Potts Stabilizing fin
US3182927A (en) * 1960-10-12 1965-05-11 Edcliff Instr Stabilized test head
FR1307270A (fr) * 1961-06-08 1962-10-26 Le Ministre Des Armees Terre D Empennage pour projectile et son procédé d'assemblage
DE1906028C3 (de) * 1969-02-07 1973-12-06 Messerschmitt-Boelkow-Blohm Gmbh, 8000 Muenchen Leitwerk fur Geschosse und Flug korper mit einer Einrichtung zur Über fuhrung der Flossen des Leitwerkes in ihre wirksame Stellung
CH552189A (de) * 1972-05-10 1974-07-31 Oerlikon Buehrle Ag Treibspiegelgeschoss.
DE2639445A1 (de) * 1976-09-02 1978-03-16 Messerschmitt Boelkow Blohm Erdeindringender flug- oder geschosskoerper
DE2844870C2 (de) * 1978-10-14 1984-10-18 Rheinmetall GmbH, 4000 Düsseldorf Unterkalibriges Übungsgeschoß
DE3618956C1 (de) * 1986-06-05 1987-11-19 Rheinmetall Gmbh Leitwerk mit entfaltbaren Fluegeln fuer Geschosse und Flugkoerper
US4815682A (en) * 1987-07-20 1989-03-28 Pacific Armatechnica Corporation Fin-stabilized subcaliber projectile and method of spin tuning
DE8710457U1 (de) * 1987-07-30 1987-12-03 Bundesrepublik Deutschland, vertreten durch den Bundesminister der Verteidigung, dieser vertreten durch den Präsidenten des Bundesamtes für Wehrtechnik und Beschaffung, 5400 Koblenz Leitwerk für Schneidvorrichtung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR556302A (fr) * 1921-12-23 1923-07-17 Perfectionnements aux projectiles à empennage
FR1556631A (fr) * 1967-03-17 1969-02-07
FR2353824A1 (fr) * 1976-06-01 1977-12-30 Rheinmetall Gmbh Projectile a portee limitee
FR2561764A1 (fr) * 1984-03-21 1985-09-27 Losfeld Christian Projectile economique pour mortier

Also Published As

Publication number Publication date
DE3933100C2 (fr) 1993-05-13
EP0374743A3 (fr) 1990-12-27
US4978088A (en) 1990-12-18
DE3933100A1 (de) 1990-06-28

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