EP0090155A2 - Treibladungskartusche für eine Mörsergeschoss - Google Patents

Treibladungskartusche für eine Mörsergeschoss Download PDF

Info

Publication number
EP0090155A2
EP0090155A2 EP83101273A EP83101273A EP0090155A2 EP 0090155 A2 EP0090155 A2 EP 0090155A2 EP 83101273 A EP83101273 A EP 83101273A EP 83101273 A EP83101273 A EP 83101273A EP 0090155 A2 EP0090155 A2 EP 0090155A2
Authority
EP
European Patent Office
Prior art keywords
cartridge
powder
strips
casing
propellant
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
EP83101273A
Other languages
English (en)
French (fr)
Other versions
EP0090155B1 (de
EP0090155A3 (en
Inventor
Rune Akhagen
Björn Pettersson
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.)
AFFAERSVERKET FFV
Original Assignee
Affarsverket FFV
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 Affarsverket FFV filed Critical Affarsverket FFV
Publication of EP0090155A2 publication Critical patent/EP0090155A2/de
Publication of EP0090155A3 publication Critical patent/EP0090155A3/en
Application granted granted Critical
Publication of EP0090155B1 publication Critical patent/EP0090155B1/de
Expired legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/08—Primers; Detonators
    • F42C19/0823—Primers or igniters for the initiation or the propellant charge in a cartridged ammunition
    • F42C19/0826—Primers or igniters for the initiation or the propellant charge in a cartridged ammunition comprising an elongated perforated tube, i.e. flame tube, for the transmission of the initial energy to the propellant charge, e.g. used for artillery shells and kinetic energy penetrators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B30/00—Projectiles or missiles, not otherwise provided for, characterised by the ammunition class or type, e.g. by the launching apparatus or weapon used
    • F42B30/08—Ordnance projectiles or missiles, e.g. shells
    • F42B30/10—Mortar projectiles
    • F42B30/12—Mortar projectiles with provision for additional propulsive charges, or for varying the length
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
    • F42B5/02—Cartridges, i.e. cases with charge and missile
    • F42B5/16—Cartridges, i.e. cases with charge and missile characterised by composition or physical dimensions or form of propellant charge, with or without projectile, or powder

Definitions

  • the present invention relates to a propellant and ignition cartridge designed to be enclosed in a cartridge tube for a finned projectile where the wall of the cartridge tube has a number of through holes so as to permit the outward flow of the powder gases from explosive powder ignited in the propellant cartridge.
  • Finned projectiles for mortars usually have a tail portion in the form of a cartridge tube which is surrounded by wings or stabilizing fins, and which encloses an ignition and propellant cartridge with suitable powder. Apart from this cartridge possibly a further quantity of powder is provided on the outside of the cartridge tube, usually in the form of a number of increment charges, of which some are often made up from thinner powder than the ramaining increment charges.
  • the cartridge tube is provided with a number of through holes to permit the exit of the powder gases.
  • the gases provide a propellant effect for the projectile, and secondly the requisite ignition impulse to any increment charges possibly present on the outside of the cartridge tube.
  • the propellant cartridge has a double task, firstly to be a portion of the propellant charge, and secondly to be the ignition unit for the majority of the propellant charge.
  • the projectile is to be fired with the minimum charge, which can be solely the propellant cartridge, or the propellant cartridge and only one increment charge (that with the thinnest powder) it is essential that the propellant cartridge should provide complete uniform combustion of the powder charge in the barrel at the low pressure which is achieved with such a small charge.
  • the maximum pressure in the barrel in such cases is about 10 MPa.
  • the hot gases flowing outwards from the system of holes are employed together with the powder particles which have been ignited but have not yet burnt out, which are normally flake powder in the form of flakes 1-3 mm square.
  • the ignited powder in the propellant cartridge is subjected, on flowing outwards into the barrel where the volume is 10 times greater than that in the cartridge tube, to a considerable reduction in temperature and pressure which reduces its effect as the igniter impulse for the powder in the increment charge.
  • the ignition impulse from the outflowing hot gases is very intensive but of short duration, usually less than 0.1 ms.
  • the aim of the present invention is to present a propellant and ignition cartridge of the type specified on the preamble which provides uniform, fast and reliable combusion of the powder in the cartridge, and, in case of the provision of increment changes, without crushing of the increment charge powder taking place.
  • This objective is achieved in that the propellant and ignition cartridge in accordance with the invention has the characteristics of claim 1.
  • Figure 1 shows a longitudinal section through the rear portion of a mortar shell having a propellant and ignition cartridge in accordance with the invention.
  • Figure 2 shows on an enlarged scale a longitudinal section through a propellant and ignition cartridge in accordance with the invention.
  • Figure 3 illustrates the pressure in the propellant cartridge as a function of time, firstly with a known propellant cartridge, and secondly for two different cartridges in accordance with the invention.
  • Figure 1 illustrates the rear portion of a finned projectile in the form of a mortar shell 1 with a tail portion in the form of an essentially hollow-cylindrical cartridge tube 2 which is open at the rear.
  • the rearmost portion of the cartridge tube 2 is surrounded by conventional guide fins 3 whilst its frontal portion is surrounded by eight sections of ring-shaped conventional increment charges 4.
  • the wall section 5 of the cartridge tube 2 located inside and somewhat forward of the increment charges has a plurality of through holes so as to permit the outward flow of the powder gases from a propellant and ignition cartridge 8 which is situationed in the hollow cylindrical space 7 of the cartridge tube.
  • the propellant and ignition cartridge 8 includes a hollow cylindrical casing 9, open at the rear, the rear open end of which is attached over an ignition screw 10 which can be threaded into the cartridge tube 2.
  • the ignition screw 10 is provided with a conventional detonator 11 having a chamber 12 for expansion of the detonator gases.
  • an ignition container 13 is provided, the ignition charge 13a of which, e.g. black powder or a pyrotechnic charge, communicates with the chamber 12 by means of holes 14 in the rear wall of the ignition container 13.
  • the ignition container 13 has a plurality of radially-directed holes 15 which open out in the interior of the propellant and ignition cartridge 8.
  • a batch 16 of extended powder strips 17 rests against the forward face of the ignition container 13. As indicated best in the embodiment shown in Figure 2, close to its rear end the strips 17 are held together by a clamp 18. By this means the batch of strips 16 exhibits a brush-like appearance, so that a ring-shaped space 19 which tapers at the front is formed between the batch 16 and the wall of the cartridge 8.
  • the powder strips 17 extend over a major portion of the length of the cartridge casing 9, preferably over at least 75 % thereof. With the embodiment illustrated in Figures 1-2, the strips 17 extend from the forward end of the ignition container 13 mainly up to the forward end of the cartridge casing 9. The width of the strips 17 is preferably 0.4-0.9 times the diameter of the casing 9. The thickness of the strips which can be 0.3-1.0 mm is governed by the desired combustion duration. With this powder form extremely stable and uniform charge density is obtained over the entire length of the cartridge. These properties are accentuated if the strips 17 are held together in a batch, as shown for example at 18 in Figure 2. In accordance with an embodiment which is not illustrated the strips 17 can be sub-divided into several separate batches which are held together.
  • the casing 9 preferably comprises a thin metal plate, preferably aluminium tube.
  • the thickness of the casing 9 is matched to suit the area of the individual exit flow holes 6, so that the opening of the holes 6 (stampings in the plate) takes place at an internal pressure which is suitable from the functional viewpoint.
  • the number of holes 6 is governed by the fact that the total hole area (total exit flow area) in relation to the total exposed surface available for combustion of the powder in the propellant cartridge is to provide the relationship between the burning powder surface and the discharge area which together with the combustion properties of the powder govern the "stagnation pressure" which is defined by the following equation:
  • the stagnation pressure must be higher than the pressure at which the system of holes opens. This means that only a small portion of the powder in the propellant cartridge burns to provide the opening pressure. After the opening pressure has been achieved, the majority of the powder in the cartridge tube burns and the gases flow outwards during a period of time which can be selected so that the requisite, but not harmful, speed is obtained. This is appropriately 0.5-3 ms, preferably 1-2 ms calculated from the time when the holes open until the pressure in the cartridge tube has again dropped to the hole opening pressure after passage of the stagnation pressure (pressure peak). This time curve is obtained if the holes 6 of the cartridge tube, the casing 9 and the powder strips 17 are dimensioned as specified above.
  • the opening pressure should be selected at so high a level that the powder in the cartridge is sufficiently over ignited, but not so high that the shock of opening extensively crushes the partial charge powder located outside.
  • the opening pressure can, dependent on the various applications, be selected between 10-50 MPa and preferable be 20-40 MPa.
  • FIG. 3 illustrates comparative tests using conventional propellant cartridges and propellant cartridges in accordance with the present invention.
  • the curve A shows the pressure in a propellant cartridge with flake powder as a function of time
  • curves B and C show the pressure as a function of time for two propellant cartridges in accordance with the invention with varying thickness for the powder strips.
  • P and U denote the stagnation pressure and the opening pressure respectively.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Air Bags (AREA)
  • Catalysts (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Portable Nailing Machines And Staplers (AREA)
EP19830101273 1982-03-30 1983-02-10 Treibladungskartusche für eine Mörsergeschoss Expired EP0090155B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8202006 1982-03-30
SE8202006A SE444724B (sv) 1982-03-30 1982-03-30 Driv- och tendpatron till vinggranat

Publications (3)

Publication Number Publication Date
EP0090155A2 true EP0090155A2 (de) 1983-10-05
EP0090155A3 EP0090155A3 (en) 1984-03-28
EP0090155B1 EP0090155B1 (de) 1986-09-17

Family

ID=20346408

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830101273 Expired EP0090155B1 (de) 1982-03-30 1983-02-10 Treibladungskartusche für eine Mörsergeschoss

Country Status (4)

Country Link
EP (1) EP0090155B1 (de)
DE (1) DE3366169D1 (de)
NO (1) NO151342C (de)
SE (1) SE444724B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0884553A1 (de) * 1997-06-11 1998-12-16 Etienne Lacroix - Tous Artifices Sa Antriebsgerät für eine die Rückstossenergie begrenzendes Geschoss
US7024998B2 (en) * 2003-06-27 2006-04-11 Raytheon Company Projectile with propelling charge holder

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1301905A (fr) * 1961-07-10 1962-08-24 Hotchkiss Brandt Projectile d'artillerie perfectionné
NL291890A (de) * 1962-04-26
US3182595A (en) * 1962-07-20 1965-05-11 Harry F Hassmann Igniter assembly containing strands of benite
CH438093A (de) * 1963-06-12 1967-06-15 Military Training Device Co Ak Kartusche
BE773633A (fr) * 1970-04-10 1972-01-31 Foerenade Fabriksverken Charge de propulsion, notamment pour des munitions de grand diametre

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0884553A1 (de) * 1997-06-11 1998-12-16 Etienne Lacroix - Tous Artifices Sa Antriebsgerät für eine die Rückstossenergie begrenzendes Geschoss
FR2764682A1 (fr) * 1997-06-11 1998-12-18 Lacroix Soc E Ensemble de propulsion pour projectile limitant l'effort de recul
US6044746A (en) * 1997-06-11 2000-04-04 Etienne Lacroix Trous Artifices S.A. Projectile propulsion assembly that limits recoil force
US7024998B2 (en) * 2003-06-27 2006-04-11 Raytheon Company Projectile with propelling charge holder

Also Published As

Publication number Publication date
NO830726L (no) 1983-10-03
SE8202006L (sv) 1983-10-01
EP0090155B1 (de) 1986-09-17
NO151342C (no) 1985-03-27
NO151342B (no) 1984-12-10
EP0090155A3 (en) 1984-03-28
DE3366169D1 (en) 1986-10-23
SE444724B (sv) 1986-04-28

Similar Documents

Publication Publication Date Title
JP3904234B2 (ja) カートリッジ型弾薬
RU2082943C1 (ru) Осколочно-фугасный снаряд
US3956990A (en) Beehive projectile
US7107909B2 (en) Cartridge munition, particularly one of medium caliber
US4760794A (en) Explosive small arms projectile
RU2080548C1 (ru) Многоцелевой снаряд
US4662280A (en) Explosive and incendiary projectile
US3726218A (en) Low velocity cartridge having total propellant ignition
US5148750A (en) Unitary projectile
US5347907A (en) Multipurpose projectile and a method of making it
DE19651170A1 (de) Zünderloses, ballistisches Sprenggeschoß
US5097766A (en) Kinetic energy projectile with pyrotechnic payload
JPS6158760B2 (de)
US7493861B1 (en) Tandem shaped charge warhead having a confined forward charge and a light-weight blast shield
JP4371820B2 (ja) カウンターマス火器
US3101053A (en) Combination fragmentation structural incendiary damage projectile
US5192829A (en) Initiation device for the propulsive charge of ammunition, for example telescoped ammunition, and ammunition ignited by such an ignition device
US5610365A (en) Cartridge ammunition having a case, an arrow projectile and an igniter-coated propellant
RU2079099C1 (ru) Снаряд со стреловидными поражающими элементами
CA1178485A (en) Arrangement for recoilless weapons
EP0090155B1 (de) Treibladungskartusche für eine Mörsergeschoss
US4485742A (en) Firearm bullet
US3179051A (en) Shot encapsulated gun shell assembly
US4519316A (en) Ammunition, preferably for machine cannons, including a projectile equipped with a tracer, with the lethal range of the projectile being limited if the target is missed
US9249759B1 (en) Nozzled mortar ignition system for improved performance

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19830228

AK Designated contracting states

Designated state(s): CH DE FR GB LI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): CH DE FR GB LI

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: AFFAERSVERKET FFV

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB LI

REF Corresponds to:

Ref document number: 3366169

Country of ref document: DE

Date of ref document: 19861023

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19910201

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19920210

GBPC Gb: european patent ceased through non-payment of renewal fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19930127

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19930223

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19930323

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19940228

Ref country code: CH

Effective date: 19940228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19941031

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19941101

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST