US3796128A - Recoilless discharge device - Google Patents

Recoilless discharge device Download PDF

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Publication number
US3796128A
US3796128A US00250028A US3796128DA US3796128A US 3796128 A US3796128 A US 3796128A US 00250028 A US00250028 A US 00250028A US 3796128D A US3796128D A US 3796128DA US 3796128 A US3796128 A US 3796128A
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US
United States
Prior art keywords
stack
tube
recoilless
discharge device
discharge
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.)
Expired - Lifetime
Application number
US00250028A
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English (en)
Inventor
F Zeyher
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.)
Airbus Defence and Space GmbH
Original Assignee
Messerschmitt Bolkow Blohm 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
Priority claimed from DE19712123411 external-priority patent/DE2123411C3/de
Application filed by Messerschmitt Bolkow Blohm AG filed Critical Messerschmitt Bolkow Blohm AG
Application granted granted Critical
Publication of US3796128A publication Critical patent/US3796128A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A1/00—Missile propulsion characterised by the use of explosive or combustible propellant charges
    • F41A1/08—Recoilless guns, i.e. guns having propulsion means producing no recoil
    • F41A1/10—Recoilless guns, i.e. guns having propulsion means producing no recoil a counter projectile being used to balance recoil

Definitions

  • Each stack cornprises relatively thin foil mate- 89/1 7()6 rial having a very large surface per unit of mass.
  • This invention relates in general to the construction of recoilless launchers particularly grenade launchers and, in particular, to a new and useful recoilless discharge device for projectiles having a discharge tube which is open at both ends and which fires a projectile out of one end when an inert mass is ejected out of the opposite end, the mass comprising at least one stack of thin foils having large surfaces per unit of mass.
  • a modified known discharge device of the same type includes a container filled with liquid or of a high specific gravity substance which forms an inert counter mass. The disadvantage in such constructions is that:
  • the container must be designed as an expansion vessel to compensate volume changes of the material with which it is filled and which will appear in the operational temperature ranges and this is constructionally complicated.
  • volume changes of the type mentioned above in (l involve the risk of movement of the center of gravity of the total mass out of the longitudinal axis of the discharge tube.
  • the cross-sectional constrictions in the discharge tube as they are provided in a tube for decelerating the cartridge case base at the tube mouth and rear opening, have an inhibiting effect both on a sand-filled container or on a liquid-filled container. This is manifested negatively in a further increase of the tube load which is very high in any event due to the great frictional forces.
  • a discharge tube which is inexpensive and simple in design and which includes an inert mass which does not.
  • the low friction ejection of the inert mass from the rear opening and an excellent deceleration of the mass after ejection, plus the simple support and guidance of the inert mass, are among the advantage of the invention.
  • the advantages of a low friction during ejection results substantially from:
  • the design of the inert mass as a subcalibrated stack of leaflets or foils which are held together preferably by strings and which can neither yield nor exert a pressure during the acceleration of the stack in the direction of the rear opening of the tube transverse to the direction of acceleration, and
  • the small contact zones related to the superficies of the tube between the discharge tube and the ledges or other supporting and guiding elements provide a further advantage.
  • the manufacture of the inert material as an easily divisible material of low specific gravity as well as great air resistance provides a stack formation of leaflets having a large surface per unit of mass.
  • the easily divisible strings hold the leaflets together and contribute to the rapid deceleration of the stack which is desirable for safety reasons They also contribute to the dissolution of the stack after leaving the discharge opening in the tube. Due to the easy divisibility of the supporting and guiding ledges, the issuance of the stack is not hindered in any way by constrictions of the cross-section in the discharge tube, such as steps for the cartridge case base.
  • the inert mass is divided into several stacks and to arrange them in the interior of the tube in such a way that they are already bent sharply by minor lateral forces and/or by the resulting pressure heads. This is the case, for example, when several stacks or leaflets in the form of circular sectors are separated from each other by supporting and guiding ledges which extend radially between adjacent stacks.
  • the deceleration and dissolution of the stacks is also enhanced by separating the leaflets arranged in series in a stack by powder layers and/or by prestressing the leaflets which are held together in a stack. This latter measure can easily be realized by leaflet curvatures of opposite directions.
  • the stack-forming leaflets are provided according to additional features of the invention with a camouflaging paint or they are transparent and have a nonreflecting surface.
  • a recoilless discharge device particularly for grenade launchers comprising a discharge tube which is open at both ends and an inert mass which is movable in the tube toward one end upon the discharge of a projectile from the other end and which comprises at least a stack of thin foils having large surfaces per unit of mass and guide means in the tube for guiding said stack in an axial direction.
  • a further object of the invention is to provide a recoilless discharge device which is simple in design, rugged in construction and economical to manufacture.
  • FIG. 1 is a partial axial sectional view of a recoilless grenade launcher constructed in accordance with the invention
  • FIG. 2 is a section taken along the line 2-2 of FIG. I.
  • the invention embodied therein comprises, a projectile launcher including a launching tube 1 containing an inert mass which is adapted to be moved out through the rear end 3 of the launching tube 1 upon the discharge of a projectile from the opposite end.
  • the inert mass includes four stacks 5a to 5d of leaflets of inert material in the form of circular sectors 6a, 6b, 6c and 6d which are grouped around the longitudinal axis of the discharge tube 1.
  • the inert mass is located between a cartridge case base 2 which adjoins the propellant charge (not shown) and the rear tube opening 3.
  • the individual stacks 6a, 6b, 6c and 6d are guidedaxially by four radially extending ledges 7a, 7b, 7c and 7d which extend between adjacent stack sectors.
  • the ledges are made of easily divisible material of low specific gravity such as polyurethane foam and they are constructed to extend along the entire length of each stack.
  • the stack-forming leaflets in the stacks 6a, 6b, 6c and 6d are characterized by a large surface per unit of mass and are made, for example, of foil material, such as a transparent non-reflecting paper. They are held together by strings 8a to 8d and they are anchored in the cartridge case base 2. The strings are made so that they will divide easily just as the supporting and guiding ledges 7a to 7d when the stack is ejected from the rear tube opening 3. In the range of the tube opening 3, there is provided a stop 9 for the cartridge case 2 which is associated with the stacks 5a to 5d in order to retain the cartridge case within the tube 1.
  • the mouth of the tube 1, which is not shown, also has a stop in the discharge end for engaging and holding the projectile carrier or cartridge case which is associated with the projectile which is fired.
  • a recoilless discharge device particularly for grenade launchers comprising a discharge tube open at both ends and an inert mass movable in said tube toward one end thereof upon the discharge of a projectile out of the other end, said inert mass comprising at least one stack of a multiplicity of thin foils having large surfaces per unit of mass, radially and axially extending guide means in said tube for guiding said stack in axial directions including at least one member extending radially outwardly from said stack and axially along the exterior of said stack, a cartridge case base slideable in said tube interiorly of said stack and covering the end of said stack remote from the said one end of said tube.
  • a recoilless discharge device according to claim 1, wherein said at least one stack comprises a plurality of stacks arranged side-by-side in said discharge tube.
  • a recoilless discharge device including a string securing said thin foils in said stack.
  • a recoilless discharge device according to claim 1, wherein said at least one stack of thin foils comprises individual leaflets arranged in series in the stack and separated from each other by a powder layer.
  • a recoilless discharge device according to claim 4, wherein said leaflets arranged in series in said stack have curvatures in opposite directions.
  • a recoilless discharge device according to claim 1, wherein said stack of thin foils comprises individual foils having a camouflage painting.
  • a recoilless discharge device according to claim 1, wherein said at least one stack of thin foils comprises individual stack-forming leaflets having transparent and non-reflecting surfaces.
  • said at least one stack comprises a plurality of segmental stacks arranged together in a cylinder, said radially and axially extending guide means including a radially extending ledge member between each stack.
  • a recoilless discharge device particularly for grenade launchers comprising a discharge tube open at both ends and an inert mass movable in said tube toward one end thereof upon the discharge of a projectile out of the other end, said inert mass comprising at least one stack of .thin foils having large surfaces per unit of mass, and guide means in said tube for guiding said stack in axial directions, said at least one stack comprising a plurality of circular sectors arranged around the axis of said tube, said guide means comprising a radially extending guide ledge disposed between adjacent sectors.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Toys (AREA)
  • Prostheses (AREA)
US00250028A 1971-05-12 1972-05-03 Recoilless discharge device Expired - Lifetime US3796128A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712123411 DE2123411C3 (de) 1971-05-12 Rückstoßfreie Abschuß vorrichtung

Publications (1)

Publication Number Publication Date
US3796128A true US3796128A (en) 1974-03-12

Family

ID=5807573

Family Applications (1)

Application Number Title Priority Date Filing Date
US00250028A Expired - Lifetime US3796128A (en) 1971-05-12 1972-05-03 Recoilless discharge device

Country Status (3)

Country Link
US (1) US3796128A (fr)
FR (1) FR2139280A5 (fr)
SE (1) SE374601B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4132148A (en) * 1976-06-30 1979-01-02 Messerschmitt-Bolkow-Blohm Gmbh Expellable reaction mass for recoilless projectile launchers
DE3424598A1 (de) * 1984-07-04 1986-01-16 Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn Rueckstossfreie abschussvorrichtung
US5551330A (en) * 1993-12-22 1996-09-03 Luchaire Defense Sa Dispersible countermass system for a recoilless weapon
US6543329B2 (en) 2000-11-08 2003-04-08 The United States Of America As Represented By The Secretary Of The Navy Nested ring based countermass assembly
US7624668B1 (en) * 2005-06-10 2009-12-01 Sanford Matthew J Recoilless launching
JP2020502463A (ja) * 2016-12-15 2020-01-23 サーブ エービーＳａａｂ Ａｂ 兵器用のカウンタマス容器
US20220373310A1 (en) * 2019-09-12 2022-11-24 Carl Salmon Grenade with independently detachable carpel segments

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2496250A1 (fr) * 1980-12-17 1982-06-18 Europ Propulsion Arme de tir sans recul a culasse morcelable

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1108717A (en) * 1913-07-07 1914-08-25 Ordnance Dev Company Fixed ammunition for use on air-craft.
US1899925A (en) * 1931-04-13 1933-03-07 Malcus Holmquist Ab Wadding for whale guns
US3211100A (en) * 1961-03-13 1965-10-12 Alcan Company Inc Wad column

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1108717A (en) * 1913-07-07 1914-08-25 Ordnance Dev Company Fixed ammunition for use on air-craft.
US1899925A (en) * 1931-04-13 1933-03-07 Malcus Holmquist Ab Wadding for whale guns
US3211100A (en) * 1961-03-13 1965-10-12 Alcan Company Inc Wad column

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4132148A (en) * 1976-06-30 1979-01-02 Messerschmitt-Bolkow-Blohm Gmbh Expellable reaction mass for recoilless projectile launchers
DE3424598A1 (de) * 1984-07-04 1986-01-16 Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn Rueckstossfreie abschussvorrichtung
US4643071A (en) * 1984-07-04 1987-02-17 Messerschmitt-Bolkow-Blohm Gmbh Recoilless launching device
US5551330A (en) * 1993-12-22 1996-09-03 Luchaire Defense Sa Dispersible countermass system for a recoilless weapon
US6543329B2 (en) 2000-11-08 2003-04-08 The United States Of America As Represented By The Secretary Of The Navy Nested ring based countermass assembly
US7624668B1 (en) * 2005-06-10 2009-12-01 Sanford Matthew J Recoilless launching
US7841267B1 (en) * 2005-06-10 2010-11-30 The United States Of America As Represented By The Navy Recoilless launching
JP2020502463A (ja) * 2016-12-15 2020-01-23 サーブ エービーＳａａｂ Ａｂ 兵器用のカウンタマス容器
EP3555546A4 (fr) * 2016-12-15 2020-08-12 Saab Ab Contenant de contre-masse pour une arme
US11041700B2 (en) 2016-12-15 2021-06-22 Saab Ab Counter mass container for a weapon
US20220373310A1 (en) * 2019-09-12 2022-11-24 Carl Salmon Grenade with independently detachable carpel segments

Also Published As

Publication number Publication date
FR2139280A5 (fr) 1973-01-05
DE2123411A1 (de) 1972-11-23
SE374601B (fr) 1975-03-10
DE2123411B2 (de) 1976-10-14

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