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 PDFInfo
- 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- Withdrawn
Links
Images
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)
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)
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)
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)
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 |
-
1989
- 1989-10-04 DE DE3933100A patent/DE3933100A1/de active Granted
- 1989-12-14 EP EP19890123175 patent/EP0374743A3/fr not_active Withdrawn
- 1989-12-18 US US07/452,696 patent/US4978088A/en not_active Expired - Fee Related
Patent Citations (4)
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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Legal Events
Date | Code | Title | Description |
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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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17P | Request for examination filed |
Effective date: 19901122 |
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17Q | First examination report despatched |
Effective date: 19920312 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19930128 |