AU2003242677A1 - Smoke projectile - Google Patents

Smoke projectile Download PDF

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Publication number
AU2003242677A1
AU2003242677A1 AU2003242677A AU2003242677A AU2003242677A1 AU 2003242677 A1 AU2003242677 A1 AU 2003242677A1 AU 2003242677 A AU2003242677 A AU 2003242677A AU 2003242677 A AU2003242677 A AU 2003242677A AU 2003242677 A1 AU2003242677 A1 AU 2003242677A1
Authority
AU
Australia
Prior art keywords
fog
enclosure
projectile according
charge
stack
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.)
Granted
Application number
AU2003242677A
Other versions
AU2003242677B2 (en
Inventor
Christian Koch Ernst
Thorsten Kothe
Josef Schneider
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 BGT Defence GmbH and Co KG
Original Assignee
Diehl Munitionssysteme GmbH and Co KG
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 Munitionssysteme GmbH and Co KG filed Critical Diehl Munitionssysteme GmbH and Co KG
Publication of AU2003242677A1 publication Critical patent/AU2003242677A1/en
Application granted granted Critical
Publication of AU2003242677B2 publication Critical patent/AU2003242677B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42AMMUNITION; BLASTING
    • F42BEXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/36Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information
    • F42B12/56Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information for dispensing discrete solid bodies
    • F42B12/70Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information for dispensing discrete solid bodies for dispensing radar chaff or infrared material
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42AMMUNITION; BLASTING
    • F42BEXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/36Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information
    • F42B12/46Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information for dispensing gases, vapours, powders or chemically-reactive substances
    • F42B12/48Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information for dispensing gases, vapours, powders or chemically-reactive substances smoke-producing, e.g. infrared clouds

Description

Australia VERIFICATION OF TRANSLATION I, Michael Wallace Richard Turner, Bachelor of Arts, Chartered Patent Attorney, European Patent Attorney, of 1 Horsefair Mews, Romsey, Hampshire S051 8JG, England, do hereby declare that I am the translator of the attached specification in the German language of International Application PCT/EP03/06147 and I state that the following is a true translation to the best of my knowledge and belief. M W R Turner Signed this /lLday of A''A 2004 1 DP 1847 WO WB/GA/bu 5 Diehl Munitionssysteme GmbH & Co KG, D-90552 R6thenbach Fog projectile The invention concerns a fog projectile having an active charge 10 comprising a pyrotechnic active material for producing an aerosol which emits in the infrared and which is impenetrable in the visual. Armoured and unarmoured vehicles are protected by means of aerosol curtains from discovery, detection and target tracking and thus from the threat of missiles. 15 DE 199 14 097 Al describes a suitable pyrotechnic active material for producing an aerosol which is strongly emissive in the infrared and impenetrable in the visible. That active material develops a protective camouflage fog or mist which, besides impenetrability in the visible range, also permits long-duration cover in the infrared range. As its main 20 constituents that active material contains red phosphorus, an alkali metal nitrate or a mixture of alkali metal nitrates while as secondary constituents it contains at least one transition metal or a metallic compound or alloy thereof, at least one metalloid and a binder. As the threatening missiles approach at flight speeds of 200 to 600 25 m/s, a fog screening effect must take place very rapidly, after they have been identified. Known projectiles however deploy their action only after a flight time and time delay of for example 2 s. In that time the vehicle is unprotected. DE 29 08 217 C2 describes a unit charge for Fog concealment of 30 vehicles, having a casing filled with fog bodies. The fog bodies are in the form of cylindrical flat discs with an open central hole, which are disposed one upon the other. The fog bodies are ejected without an enclosure from the casing. The arrangement does not provide for fading out of the line of sight in the infrared range.
2 The object of the invention is to provide a fog projectile of a simple structure, which is so designed that rapid fading of the line of sight in the infrared radiation range and in the visual radiation range occurs upon discharge in a spatial angle. 5 According to the invention the foregoing object is attained by the features of claim 1. The active charge stack consisting of the hollow-cylinder segments is discharged or expelled, held by an enclosure or sheathing, from a projector barrel, whereby aerodynamic stability is guaranteed in the initial phase of 10 the flight. That ensures that the stack does not already deploy immediately at the vehicle. It is only after some metres of flight, for example 5 m to 10 m, that the fired hollow-cylinder segments break the enclosure or sheathing open. Due to the resulting absence of aerodynamic cladding the flow of air acting thereon gets into the stack of the hollow-cylinder 15 segments. As a result the segments are immediately driven apart, which results in the burning hollow-cylinder segments fanning out over a large area, in a wide spatial angle. That provides an aerosol fog or mist distribution very quickly, for example within 0.25 s, which conceals the vehicle both in relation to missiles approaching horizontally and also in 20 gliding flight, in the infrared radiation range and in the visual radiation range. In the vehicle therefore there is a period of time which is long in comparison with the state of the art to perform travel manoeuvres to evade the moment of impact, as calculated in the vehicle, of the approaching missile. 25 Advantageous configurations are set forth in the appendant claims and the description hereinafter. In the drawing: Figure 1 shows a fog projectile with a plurality of layers of hollow cylinder segments in an enclosure or sheathing, Figure 2a is a plan view of a layer of four hollow-cylinder segments, 30 Figure 2b shows a side view in the direction of the arrows IIb-IIb in Figure 2a, Figure 3a shows a plan view of a single hollow-cylinder segment, 3 Figure 3b shows a perspective view of a single hollow-cylinder segment, Figure 4 shows an apertured disc of the enclosure or sheathing, Figure 5 shows a foil of the enclosure or sheathing, unwound, 5 Figure 6 shows the fog projectile in a discharge device, Figure 7 shows an aerosol fog produced by the fog projectile, and Figure 8 shows a time diagram of the development of the effect of the aerosol fog. A fog projectile 1 comprises a hollow-cylindrical active charge 2, a 10 firing charge 3 and an enclosure or sheathing 4 (see Figure 1). The active charge 2 is a stack comprising a plurality of layers 5 of hollow-cylinder segments 6. Each layer 5 is composed of a plurality of hollow-cylinder segments 6. There is a hollow space 7 in the interior of the active charge stack. 15 As shown in Figures 2a and 2b each layer 5 is formed by four hollow cylinder segments 6, wherein the segment angle a is 90* and the individual hollow-cylinder segments 6 bear against each other. The segment angle a can also be smaller than 90', in which case then there are correspondingly more hollow-cylinder segments 6 in a layer. 20 The diameter d of the hollow space 7 is <. 1/6 D, wherein D is the outside diameter of the active charge stack (see Figure 1 and Figures 2a and 2b). The active charge stack 2 is of a height H which is for example > 20 h, wherein h is the height of a hollow-cylinder segment (see Figures 1, 2b 25- and 3b). The height h is preferably > 1/15 D. The hollow-cylinder segments 6 are compressed from a pyrotechnic active material which produces an aerosol which is emitting and damping in the infrared radiation range and which is impenetrable in the visual. An 30 active material of that kind is described in DE 199 14 097 Al. As main constituents it has red phosphorus, an alkali metal nitrate or a mixture of alkali metal nitrates and as secondary constituents it has at least one 4 transition metal, or a metal-rich compound or alloy thereof and at least one metalloid and a binder. The firing charge 3 which serves to fire the hollow-cylinder segments 6 by way of the hollow space 7 and which can serve as a discharge charge 5 is a pyrotechnic firing composition which contains: 50 to 80% by mass of black powder, 0 to 20% of an organic binder, 0 to 2 0 % of a metal powder from the group of the metals magnesium, aluminium, boron, zirconium and titanium, and 10 0 to 20% of a burning moderator based on a transition metal compound such as CuO, K[Fe 2
(CN)
6
],(C
5
H
5
)
2 Fe). The enclosure or sheathing 4 has a combustible foil 8 which for example comprises a paper saturated with paraffin. The foil 8 initially holds together the active charge stack 2 consisting of the hollow-cylinder 15 segments 6. The foil 8 encloses the active charge stack 2 at the top side and at its periphery U, corresponding to the diameter D, over the entire height H. Figure 5 shows the foil 8 in the unwound condition. The foil 8 is connected to a disc 9 which bears against the underside of the active charge 2. 20 The disc 9 comprises a pressed fibre material and has a central opening 10. The diameter dl of the opening 10 is > the diameter d (see Figure 1 and Figure 4). The described fog projectile can be inserted into a metallic projector barrel 11 (see Figure 6). Figure 6 shows the arrangement in the pulled 25 apart condition. Arranged at the bottom 12 of the barrel 11 is an electrical firing element 13 whose electrical contacts 14 can be closed by way of a suitable switching device in the vehicle. The firing element 13 upon initiation fires the firing charge 3 which can act at the same time as the ejection charge. 30 When firing takes place the hollow-cylinder segments 6 are fired and the fog projectile 1 is ejected. In the region of between about 5 and 10 m after the beginning of gas development of ejection, the hollow-cylinder segments 6 remain held together by the foil 8. After the foil 8 burns away, 5 about 5 to 10 m after leaving the vehicle-mounted barrel 11, the active charge stack 2 fans out, with the hollow-cylinder segments 6 separating, and the individual hollow-cylinder segments 6, after a distance S at a spacing from the vehicle F to be protected, develop a fog curtain N which 5 screens the vehicle F both in relation to a missile K1 which is threatening in a condition of gliding flight and a missile K2 which is attacking in horizontal flight (see Figure 7). Development of the protective fog N is effected for example within 0.25s after the vehicle F has identified and evaluated the threat posed by 10 the missiles K1 and K2. Figure 8 shows a comparison of known operative times and the operative time which can be achieved by the projectile according to the invention. At the time tO the vehicle F identifies the threat posed by an approaching missile and thus triggers discharge of the camouflage fog 15 device, which then takes place at the moment t1. The time t4 is the time at which, according to the calculation of the vehicle F, the threatening projectile impacts. In accordance with the state of the art fog generation W which counteracts the missile threat is achieved in accordance with the line a at 20 the moment t3 whereas the active level achieved with the described device is already achieved in accordance with the line b at the time t2. It will be seen in this respect that the period of time between t3 and t4 is substantially shorter than the period of the time between t2 and t4. This means that, between t2 and t4, the vehicle under threat has available a 25 substantially longer period of time for travel manoeuvres to evade the threat, than in the state of the art in which only the time between t3 and t4 is available for evasive travel manoeuvres.

Claims (11)

1. A fog projectile having an active charge comprising a pyrotechnic active material for producing an aerosol which emits in the infrared and which is impenetrable in the visual, characterised in that the active charge (2) is a hollow-cylinder stack, that the stack is composed of a plurality of layers (5) of hollow-cylinder segments (6) and that the stack is held in an enclosure (4) which can burn away and which contains a firing charge (3).
2. A fog projectile according to claim 1 characterised in that the firing charge (3) forms the lowermost layer of the stack.
3. A fog projectile according to claim 1 characterised in that the enclosure (4) has a combustible foil (8).
4. A fog projectile according to one of the preceding claims characterised in that the enclosure (4) comprises a foil (8) and a disc (9) arranged beneath the stack.
5. A fog projectile according to one of the preceding claims characterised in that the foil (8) of the enclosure (4) encloses the active charge (2) at the periphery and at the top side.
6. A fog projectile according to one of the preceding claims characterised in that the foil (8) comprises a paper saturated with paraffin.
7. A fog projectile according to one of the preceding claims characterised in that the disc (9) of the enclosure (4) is a disc of pressed fibre material.
8. A fog projectile according to one of the preceding claims characterised in that the disc (9) of the enclosure (4) has an opening (10) therethrough. 7
9. A fog projectile according to one of the preceding claims characterised in that an electrical firing element (13) projects into the firing charge (3).
10. A fog projectile according to one of the preceding claims characterised in that the firing charge (3) is also an ejection charge.
11. A fog projectile according to one of the preceding claims characterised in that the dimensioning is such that the enclosure (4) breaks open about 5 to 10 m along its trajectory.
AU2003242677A 2002-06-14 2003-06-12 Smoke projectile Ceased AU2003242677B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10226507.0 2002-06-14
DE10226507A DE10226507A1 (en) 2002-06-14 2002-06-14 A smoke
PCT/EP2003/006147 WO2003106913A1 (en) 2002-06-14 2003-06-12 Smoke projectile

Publications (2)

Publication Number Publication Date
AU2003242677A1 true AU2003242677A1 (en) 2003-12-31
AU2003242677B2 AU2003242677B2 (en) 2009-03-26

Family

ID=29594519

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2003242677A Ceased AU2003242677B2 (en) 2002-06-14 2003-06-12 Smoke projectile

Country Status (9)

Country Link
US (1) US20060060103A1 (en)
EP (1) EP1514072B1 (en)
AU (1) AU2003242677B2 (en)
BR (1) BR0311793B1 (en)
DE (2) DE10226507A1 (en)
IL (1) IL165732A (en)
MY (1) MY134363A (en)
WO (1) WO2003106913A1 (en)
ZA (1) ZA200410264B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7640858B1 (en) * 2004-01-23 2010-01-05 Kilgore Flares Company, Llc Stacked pellet flare assembly and methods of making and using the same
DE102006008309B4 (en) * 2006-02-23 2008-03-27 Diehl Bgt Defence Gmbh & Co. Kg A smoke
DE102008028292B4 (en) 2008-06-13 2021-10-14 Diehl Defence Gmbh & Co. Kg Smoke missile
DE102008033494A1 (en) 2008-07-16 2010-01-21 Diehl Bgt Defence Gmbh & Co. Kg smoke pot
DE102010013110A1 (en) * 2010-03-26 2011-09-29 Rheinmetall Waffe Munition Gmbh Encapsulated active body for an IR deception or decoy
DE102010026641A1 (en) 2010-07-09 2012-01-12 Diehl Bgt Defence Gmbh & Co. Kg A smoke
DE102011009154A1 (en) 2011-01-22 2012-07-26 Diehl Bgt Defence Gmbh & Co. Kg Method for defensive threat by dispending of camouflage smoke, involves utilizing movement grenades for discharging visual camouflage smoke effective masses before attacking unit
DE102014012657B4 (en) * 2014-08-22 2019-12-19 Diehl Defence Gmbh & Co. Kg Active body with an active mass and a covering
DE102015004306A1 (en) * 2015-04-01 2016-10-06 Diehl Bgt Defence Gmbh & Co. Kg A smoke
US10926273B2 (en) 2019-01-31 2021-02-23 Toyota Motor Engineering & Manufacturing North America, Inc. Systems and methods for modifying an infrared signature of a vehicle

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US3352238A (en) * 1965-10-12 1967-11-14 Universal Match Corp Atomizer and method for disseminating toxicants
US3861880A (en) * 1973-03-06 1975-01-21 Dow Chemical Co Oxygen generator cell
DE2359758C1 (en) * 1973-11-30 1988-07-28 Buck Chemisch-Technische Werke Gmbh & Co, 7347 Bad Ueberkingen, De
FR2343989A1 (en) * 1976-03-09 1977-10-07 Lacroix E Airship antimissile ignition canister - has plug at each end and attached to spindle broken by ignition of charge
NO142930C (en) * 1978-03-08 1980-11-12 Raufoss Ammunisjonsfabrikker DEVICE CHARGE FOR VEHICLE PROTECTION.
DE2811016C1 (en) * 1978-03-14 1986-07-17 Buck Chemisch-Technische Werke Gmbh & Co, 8230 Bad Reichenhall Throwing body
US4860657A (en) * 1978-05-05 1989-08-29 Buck Chemisch-Technische Werke Gmbh & Co. Projectile
DE3238455A1 (en) * 1982-10-16 1984-04-19 Pyrotechnische Fabrik F. Feistel GmbH + Co KG, 6719 Göllheim FOGGED BODY
US5113765A (en) * 1990-03-30 1992-05-19 James Carey Absolute anti-roll emergency road flare
NO171750C (en) * 1991-01-21 1993-04-28 Raufoss As DEVICE FOR ROEYK GRANATE
DE4125355C1 (en) * 1991-07-31 1993-01-28 Buck Werke Gmbh & Co, 7347 Bad Ueberkingen, De
FR2729749B1 (en) * 1993-07-29 1997-05-23 Lacroix Soc E INFRARED LURE CARTRIDGE AND LURE DEVICE COMPRISING SUCH A CARTRIDGE
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DE19914095A1 (en) * 1999-03-27 2000-09-28 Piepenbrock Pyrotechnik Gmbh Pyrotechnic mist set for generating an aerosol that is impenetrable in the visible, infrared and millimeter-wave range
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Also Published As

Publication number Publication date
EP1514072A1 (en) 2005-03-16
EP1514072B1 (en) 2005-11-30
BR0311793A (en) 2005-03-15
US20060060103A1 (en) 2006-03-23
BR0311793B1 (en) 2013-12-31
AU2003242677B2 (en) 2009-03-26
MY134363A (en) 2007-12-31
DE10226507A1 (en) 2003-12-24
IL165732A (en) 2010-11-30
DE50301814D1 (en) 2006-01-05
IL165732A0 (en) 2006-01-15
ZA200410264B (en) 2007-07-25
WO2003106913A1 (en) 2003-12-24

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FGA Letters patent sealed or granted (standard patent)
MK14 Patent ceased section 143(a) (annual fees not paid) or expired