EP0242501A1 - Assembly for accelerating projectiles by means of an electrically heated plasma - Google Patents

Assembly for accelerating projectiles by means of an electrically heated plasma Download PDF

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Publication number
EP0242501A1
EP0242501A1 EP87100187A EP87100187A EP0242501A1 EP 0242501 A1 EP0242501 A1 EP 0242501A1 EP 87100187 A EP87100187 A EP 87100187A EP 87100187 A EP87100187 A EP 87100187A EP 0242501 A1 EP0242501 A1 EP 0242501A1
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EP
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Prior art keywords
electrode
plasma
projectile
tube
electrically heated
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Granted
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EP87100187A
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German (de)
French (fr)
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EP0242501B1 (en
Inventor
Wolfram Dr. Witt
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Rheinmetall Industrie AG
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Rheinmetall GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B6/00—Electromagnetic launchers ; Plasma-actuated launchers

Definitions

  • the present invention relates to a device for accelerating projectiles located in a tube closed on one side by an electrically heated plasma with the features of the preamble of claim 1.
  • a particularly disadvantage of these known devices is that a relatively large initial volume is required in which the plasma is generated and heated.
  • the present invention was therefore based on the object of further developing a device of the type mentioned at the outset so that the initial volume in which the plasma is generated and heated is as small as possible.
  • a known acceleration device is shown again, such as that from the Goldstein et. al. is described in more detail.
  • Fig. 1 denotes a tube which is closed on one side and on the tube bottom of which the closure is located a first electrode 2 is arranged.
  • a second electrode 3 (ring electrode) arranged electrically insulated from the first electrode is connected to the first electrode 2 via a voltage source 4 and a switch.
  • the two electrodes 2 and 3 define a plasma chamber designated 6 in the tube 1, which is initially closed in the area of the ring electrode 3 by a projectile 7 to be accelerated.
  • this device has the disadvantage that the plasma chamber 6 has a relatively large volume in which the driving pressure builds up relatively slowly.
  • FIGS. 2 and 3 show the embodiment of a device according to the invention, which manages with a slit-shaped plasma space.
  • the tube 10 of a plasma cannon is designated by 10, which at the same time forms the ring electrode 100 at its closure-side end.
  • the coaxial central electrode is identified by 11 and the insulating body between central electrode 11 and ring electrode 100 is identified by 12.
  • Part of the inner surface of the tube 10 is at the closure end with a burn-resistant contact material 13, for. B. lined with a sintered material of tungsten and Kopfer.
  • the projectile 14, the inner wall of the ring electrode 100 and the coaxial central electrode form a gap-shaped discharge space 15.
  • the acceleration process is initiated by closing the switch 5 (FIG. 3) by a discharge which is formed in the narrow gap 15 between the projectile 14 and the insulating piece 12 or the coaxial central electrode 11.
  • material is vaporized and heated up predominantly in the base areas of the hot arc.
  • further material is evaporated due to the close contact of the arc with the walls of the gap.
  • the resulting pressure drives the projectile 14 towards the pipe end.
  • a plasma 16 forms in the increasing plasma space behind the projectile 14.
  • FIG. 4 shows a simplified circuit diagram for operating the plasma cannon according to the invention.
  • the schematically represented plasma cannon was designated 9 and the simplified circuit diagram was designated 20.
  • 10 denotes the tube and the ring electrode, and 11 the first electrode.
  • a drive for. B. a motor powered by a liquid fuel
  • 22 denotes a DC generator.
  • the voltage generated by the direct current generator is fed via switch 23 to a capacitor 24, which acts as a capacitive energy store.
  • the capacitance 24 is connected on the one hand via a switch 25 to the first electrode 11 and on the other hand via a current-limited inductor 27 to the second electrode 10.
  • the capacitance 24 can be short-circuited via a switch 26.
  • the capacitive energy store 24 is charged to the voltage Uo.
  • the energy store is discharged via the inductor 27 and via the plasma in the accelerator.
  • the short-circuit switch 26 is closed. The decreasing current flow through the accelerator plasma is then maintained by the inductance of the coil 27.
  • the mode of operation of the plasma cannon does not essentially depend on the gap 15 between the projectile 14 and the coaxial electrode 10 (cf. FIGS. 2 and 3).
  • the gap-shaped intermediate space 15 can preferably also be filled with a slightly gassing material (for example polyethylene).
  • a slightly gassing material for example polyethylene
  • light-gassing materials are substances that break down into molecules (gases) with a low molecular weight (molecular weight ⁇ 30) under the effect of the arc discharge. Due to the additional material evaporation of this substance, the energy conversion in the plasma is controlled and the plasma pressure increases, so that the projectile leaves the tube 10 at a higher speed.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • Plasma Technology (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Vending Machines For Individual Products (AREA)

Abstract

1. Apparatus for accelerating a projectile (14) located in a barrel (10) which is closed at one end and using an electrically heated plasma, wherein two electrodes (11, 100) are provided for the production of the plasma, the first electrode (11) being positioned coaxially in the breech end part of the barrel (10) and the second electrode (100) being constructed as an annular electrode, characterised by the fact that the second electrode (100) is situated at the breech end of the barrel (10) and that the electrodes (11, 100) together with the projectile (14) to be accelerated, form a gapped discharge space (15).

Description

Die vorliegende Erfindung betrifft eine Vorrichtung zur Beschleunigung von in einem einseitig verschlossenem Rohr befindlichen Projektilen durch ein elektrisch aufgeheiz­tes Plasma mit den Merkmalen des Oberbegriffs des An­spruchs 1.The present invention relates to a device for accelerating projectiles located in a tube closed on one side by an electrically heated plasma with the features of the preamble of claim 1.

Es ist bekannt, daß mit elektrisch aufgeheizten Plasmen Projektile in metallischen Rohren auf hohe Geschwindig­keiten beschleunigt werden können (vgl. Goldstein S.A. et. al. Final Report on Research and Development of a Plasma Jet Mass Accelerator as a Driver for Impact Fusion; GT-Devices, Alexandria, VA, USA, Contract DE-AC05-81-­ER10846, May 1984). Bei diesen bekannten Vorrichtungen werden in engen Isolierstoffkapillaren Plasmastrahlen er­zeugt, die auf den Projektilboden einwirken. Durch Kon­takt der Gasentladung mit den Kapillarwänden kommt es zur Ablation von Isolierstoff und zur Aufheizung des Plasmas. Die Folge sind Plasmastrahlen, die aus den Kapillaröffnun­gen austreten.It is known that projectiles in metallic tubes can be accelerated to high speeds with electrically heated plasmas (see Goldstein SA et. Al. Final Report on Research and Development of a Plasma Jet Mass Accelerator as a Driver for Impact Fusion; GT-Devices , Alexandria, VA, USA, Contract DE-AC05-81-ER10846, May 1984). In these known devices, plasma jets are generated in narrow insulating capillaries, which act on the projectile floor. Contact of the gas discharge with the capillary walls leads to ablation of the insulating material and heating of the plasma. The result is plasma jets that emerge from the capillary openings.

Besonders nachteilig ist bei diesen bekannten Vorrichtun­gen, daß ein relativ großes Anfangsvolumen erforderlich ist, in dem das Plasma erzeugt und aufgeheizt wird.A particularly disadvantage of these known devices is that a relatively large initial volume is required in which the plasma is generated and heated.

Der vorliegenden Erfindung lag daher die Aufgabe zugrunde, eine Vorrichtung der eingangs erwähnten Art so weiterzu­entwickeln, daß das Anfangsvolumen, in dem das Plasma erzeugt und aufgeheizt wird, möglichst gering ist.The present invention was therefore based on the object of further developing a device of the type mentioned at the outset so that the initial volume in which the plasma is generated and heated is as small as possible.

Erfindungsgemäß wird diese Aufgabe durch die Merkmale des kennzeichnenden Teils des Anspruchs 1 gelöst.According to the invention, this object is achieved by the features of the characterizing part of claim 1.

Die Unteransprüche geben besonders vorteilhafte Ausge­staltungen der Erfindung wieder.The subclaims represent particularly advantageous embodiments of the invention.

Einzelheiten und Vorteile der Erfindung werden im folgen­den anhand von Ausführungsbeispielen, welche mit Hilfe von Figuren erläutert werden, beschrieben.Details and advantages of the invention are described below with reference to exemplary embodiments, which are explained with the aid of figures.

Es zeigen:

  • Fig. 1 eine bekannte Vorrichtung zur Beschleunigung von Projektilen mittels eines elektrisch auf­geheizten Plasmas;
  • Fig. 2 den Schnitt einer erfindungsgemäßen Vorrich­tung vor Zünden des Plasmas;
  • Fig. 3 den Schnitt einer erfindungsgemäßen Plasma­kanone nach Zünden des Plasmas;
  • Fig. 4 einen vereinfachten Schaltplan zum Betrieb der erfindungsgemäßen Plasmakanone;
  • Fig. 5 den zeitlichen Verlauf des Stromes in der Plasmakanone.
Show it:
  • 1 shows a known device for accelerating projectiles by means of an electrically heated plasma;
  • 2 shows the section of a device according to the invention before igniting the plasma;
  • 3 shows the section of a plasma cannon according to the invention after ignition of the plasma;
  • 4 shows a simplified circuit diagram for operating the plasma cannon according to the invention;
  • Fig. 5 shows the time course of the current in the plasma gun.

In Fig. 1 ist noch einmal eine bekannte Beschleunigungs­vorrichtung dargestellt, wie sie etwa aus dem eingangs zitierten Bericht von Goldstein et. al. näher beschrie­ben wird.In Fig. 1, a known acceleration device is shown again, such as that from the Goldstein et. al. is described in more detail.

In Fig. 1 ist mit 1 ein einseitig verschlossenes Rohr bezeichnet, an dessen verschlußseitigem Rohrboden eine erste Elektrode 2 angeordnet ist. Eine zweite von der ersten Elektrode elektrische isoliert angeordnete Elek­trode 3 (Ringelektrode) ist über eine Spannungsquelle 4 und einen Schalter mit der ersten Elektrode 2 verbun­den. Durch die beiden Elektroden 2 und 3 wird in dem Rohr 1 eine mit 6 bezeichnete Plasmakammer definiert, die im Bereich der Ringelektrode 3 zunächst durch ein zu beschleunigendes Projektil 7 abgeschlossen ist.In Fig. 1, 1 denotes a tube which is closed on one side and on the tube bottom of which the closure is located a first electrode 2 is arranged. A second electrode 3 (ring electrode) arranged electrically insulated from the first electrode is connected to the first electrode 2 via a voltage source 4 and a switch. The two electrodes 2 and 3 define a plasma chamber designated 6 in the tube 1, which is initially closed in the area of the ring electrode 3 by a projectile 7 to be accelerated.

Nach dem Schließen des Schalters 5 wird zwischen den Elek­troden 2 und 3 ein Lichtbogen gezündet und daß Projektil 7 durch den Druck des Lichtbogenplasmas beschleunigt.After closing switch 5, an arc is ignited between electrodes 2 and 3 and that projectile 7 is accelerated by the pressure of the arc plasma.

Wie bereits eingangs erwähnt, weist diese Vorrichtung den Nachteil auf, daß die Plasmakammer 6 ein relativ großes Volumen aufweist, in der der treibende Druck sich ver­hältnismäßis langsam aufbaut.As already mentioned at the beginning, this device has the disadvantage that the plasma chamber 6 has a relatively large volume in which the driving pressure builds up relatively slowly.

Die Fig. 2 und 3 zeigen das Ausführungsbeispiel einer erfindungsgemäßen Vorrichtung, die mit einem spaltför­migen Plasmaraum auskommt.2 and 3 show the embodiment of a device according to the invention, which manages with a slit-shaped plasma space.

Mit 10 ist das Rohr einer Plasmakanone bezeich­net, welches gleichzeitig an seinem verschlußseitigen Ende die Ringelektrode 100 bildet. Die koaxiale Mittel­elektrode ist mit 11 und der Isolierkörper zwischen Mittelelektrode 11 und Ringelektrode 100 ist mit 12 gekennzeichnet.The tube 10 of a plasma cannon is designated by 10, which at the same time forms the ring electrode 100 at its closure-side end. The coaxial central electrode is identified by 11 and the insulating body between central electrode 11 and ring electrode 100 is identified by 12.

Ein Teil der inneren Oberfläche des Rohres 10 ist am verschlußseitigen Ende mit einem abbrandfesten Kontakt­material 13, z. B. mit einem Sinterwerkstoff aus Wolfram und Kopfer, ausgekleidet. Das Projektil 14, die Innen­wand der Ringelektrode 100 und die koaxiale Mittelel­ektrode bilden einen spaltförmigen Entladungsraum 15. Zur Beschleunigung des Projektils 14 wird dieses un­mittelbar vor bzw. so, daß ein spaltförmiger Entladungs­raum 15 gebildet wird, angeordnet. Der Beschleunigungs­vorgang wird durch Schließen des Schalters 5 (Fig. 3) durch eine Entladung eingeleitet, die sich in dem engen Spalt 15 zwischen Projektil 14 und Isolierstück 12 bzw. koaxialen Mittelelektrode 11 ausbildet. Während des raschen Anstieges des Stromes i wird überwiegend in den Fußpunktsgebieten des heißen Lichtbogens Material ver­dampft und aufgeheizt. Zusätzlich wird durch den engen Kontakt des Lichtbogens mit den Wänden des Spalts wei­teres Material verdampft. Der dabei entstehende Druck treibt das Projektil 14 in Richtung des Rohrendes. Während der Beschleunigung bildet sich in dem größer werdenden Plasmaraum hinter dem Projektil 14 ein Plasma 16 aus.Part of the inner surface of the tube 10 is at the closure end with a burn-resistant contact material 13, for. B. lined with a sintered material of tungsten and Kopfer. The projectile 14, the inner wall of the ring electrode 100 and the coaxial central electrode form a gap-shaped discharge space 15. To accelerate the projectile 14, this is arranged immediately before or in such a way that a gap-shaped discharge space 15 is formed. The acceleration process is initiated by closing the switch 5 (FIG. 3) by a discharge which is formed in the narrow gap 15 between the projectile 14 and the insulating piece 12 or the coaxial central electrode 11. During the rapid rise of current i, material is vaporized and heated up predominantly in the base areas of the hot arc. In addition, further material is evaporated due to the close contact of the arc with the walls of the gap. The resulting pressure drives the projectile 14 towards the pipe end. During acceleration, a plasma 16 forms in the increasing plasma space behind the projectile 14.

Fig. 4 zeigt einen vereinfachten Schaltplan zum Betrieb der erfindungsgemäßen Plasmakanone. Mit 9 wurde dabei die schematisch dargestellte Plasmakanone und mit 20 der vereinfachte Schaltplan bezeichnet. Mit 10 ist das Rohr und die Ringelektrode, und mit 11 die erste Elektro­de bezeichnet.4 shows a simplified circuit diagram for operating the plasma cannon according to the invention. The schematically represented plasma cannon was designated 9 and the simplified circuit diagram was designated 20. 10 denotes the tube and the ring electrode, and 11 the first electrode.

In dem Schaltplan 20 wird mit 21 ein Antrieb, z. B. ein mit einem Flüssigtreibstoff gespeister Motor, und mit 22 ein Gleichstromgenerator bezeichnet. Die von dem Gleichstromgenerator erzeugte Spannung wird über den Schalter 23 einer Kapazität 24 zugeführt, die als kapazitiver Energiespeicher wirkt. Die Kapazität 24 ist einerseits über einen Schalter 25 mit der ersten Elektrode 11 und andererseits über eine strombegrenzte Induktivität 27 mit der zweiten Elektrode 10 verbunden.In the circuit diagram 20, a drive, for. B. a motor powered by a liquid fuel, and 22 denotes a DC generator. The voltage generated by the direct current generator is fed via switch 23 to a capacitor 24, which acts as a capacitive energy store. The capacitance 24 is connected on the one hand via a switch 25 to the first electrode 11 and on the other hand via a current-limited inductor 27 to the second electrode 10.

Außerdem kann die Kapazität 24 über einen Schalter 26 kurzgeschlossen werden.In addition, the capacitance 24 can be short-circuited via a switch 26.

Zu Beginn des Beschleunigungsvorganges ist der kapazi­tive Energiespeicher 24 auf die Spannung Uo aufgeladen. Nach Einlegen des Schalters 25 zum Zeitpunkt t = t0 (vgl. auch Fig. 5), entlädt sich der Energiespeicher über die Induktivität 27 und über das Plasma im Beschleuniger. Wenn zum Zeitpunkt t = t1 der Strom i seinen maximalen Wert imax erreicht hat, wird der Kurzschlußschalter 26 geschlossen. Der abnehmende Stromfluß über das Beschleu­nigerplasma wird danach durch die Induktivität der Spule 27 aufrechterhalten.At the beginning of the acceleration process, the capacitive energy store 24 is charged to the voltage Uo. After inserting the switch 25 at time t = t0 (cf. also FIG. 5), the energy store is discharged via the inductor 27 and via the plasma in the accelerator. When the current i has reached its maximum value i max at the time t = t1, the short-circuit switch 26 is closed. The decreasing current flow through the accelerator plasma is then maintained by the inductance of the coil 27.

Bei einem praktischen Ausführungsbeispiel der erfindungs­gemäßen Vorrichtung wurde bei eine Ladespannung von 9 kV ein Aluminiumkörper der Masse von m = 15g beschleunigt. Der Strom erreichte nach t1 = 88 µs sein Maximum von imax = 282 kA und fiel danach nahezu linear ab. Die Fluggeschwindigkeit des Projektiles be­trug dabei 1020 m/s.In a practical embodiment of the device according to the invention, an aluminum body with a mass of m = 15 g was accelerated at a charging voltage of 9 kV. After t1 = 88 µs, the current reached its maximum of i max = 282 kA and then fell almost linearly. The flight speed of the projectile was 1020 m / s.

Bei allen durchgeführten Versuchen hat sich ergeben, daß die Funktionsweise der Plasmakanone nicht wesentlich von dem Spalt 15 zwischen Projektil 14 und der koaxialen Elektrode 10 (vgl. Fig. 2 und Fig. 3) abhängt. So war es beispielsweise auch möglich, das Projektil 15 direkt vor der koaxialen Innenelektrode 11 anzuordnen (Abstand zwischen Innenelektrode und Projektil = 0).In all the tests carried out, it has been found that the mode of operation of the plasma cannon does not essentially depend on the gap 15 between the projectile 14 and the coaxial electrode 10 (cf. FIGS. 2 and 3). For example, it was also possible to arrange the projectile 15 directly in front of the coaxial inner electrode 11 (distance between inner electrode and projectile = 0).

Vorzugsweise kann der spaltförmige Zwischenraum 15 aber auch mit einem leicht gasenden Material (z. B. Poly­äthylen) gefüllt werden. Als leichtgasendes Material werden dabei solche Stoffe bezeichnet, die unter der Wirkung der Lichtbogenentladung in Moleküle (Gase) mit niedrigem Molekulargewicht (Molekulargewicht <30) zerfallen. Durch die zusätzliche Materialverdampfung dieses Stoffes wird der Energieumsatz im Plasma gersteuert und es erhöht sich der Plasmadruck, so daß das Projektil mit höherer Geschwindigkeit das Rohr 10 verläßt.However, the gap-shaped intermediate space 15 can preferably also be filled with a slightly gassing material (for example polyethylene). In this context, light-gassing materials are substances that break down into molecules (gases) with a low molecular weight (molecular weight <30) under the effect of the arc discharge. Due to the additional material evaporation of this substance, the energy conversion in the plasma is controlled and the plasma pressure increases, so that the projectile leaves the tube 10 at a higher speed.

Claims (4)

1. Vorrichtung zur Beschleunigung von in einem einseitig verschlossenen Rohr befindlichen Projektil durch ein elektrisch aufgeheiztes Plasma, bei der zur Erzeugung des Plasmas zwei Elektroden vorgesehen sind, wobei die erste Elektrode in dem verschlußseitigen Teil des Roh­res koaxial angeordnet und die zweite Elektrode als Ringelektrode ausgebildet ist, dadurch ge­kennzeichnet, daß die zweite Elektrode am verschlußseitigen Ende des Rohres (10) angeordnet ist und daß die Elektroden (11, 10) zusammen mit dem zu beschleunigenden Projektil (14) einen spaltförmigen Entladungsraum (15) bilden.1. Device for accelerating a projectile located in a tube closed on one side by an electrically heated plasma, in which two electrodes are provided for generating the plasma, the first electrode being arranged coaxially in the closure-side part of the tube and the second electrode being designed as a ring electrode , characterized in that the second electrode is arranged at the closure-side end of the tube (10) and that the electrodes (11, 10) together with the projectile (14) to be accelerated form a gap-shaped discharge space (15). 2. Vorrichtung nach Anspruch 1, dadurch ge­kennzeichnet, daß sich in dem spaltförmigen Entladungsraum (15) leichtgasende Stoffe befinden.2. Device according to claim 1, characterized in that in the gap-shaped discharge space (15) there are slightly gassing substances. 3. Vorrichtung nach einem der Ansprüche 1 oder 2, da­durch gekennzeichnet, daß die zweite Elektrode durch das Rohr (10) selbst gebildet wird.3. Device according to one of claims 1 or 2, characterized in that the second electrode is formed by the tube (10) itself. 4. Vorrichtung nach Anspruch 4, dadurch ge­kennzeichnet, daß das Rohr (10) am verschlußseitigen Ende mit abbrandfestem Kontaktma­terial (13) ausgekleidet ist.4. The device according to claim 4, characterized in that the tube (10) is lined at the closure end with erosion-resistant contact material (13).
EP87100187A 1986-04-19 1987-01-09 Assembly for accelerating projectiles by means of an electrically heated plasma Expired EP0242501B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863613260 DE3613260A1 (en) 1986-04-19 1986-04-19 DEVICE FOR ACCELERATING PROJECTILES THROUGH AN ELECTRICALLY HEATED PLASMA
DE3613260 1986-04-19

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EP0242501A1 true EP0242501A1 (en) 1987-10-28
EP0242501B1 EP0242501B1 (en) 1989-02-15

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EP (1) EP0242501B1 (en)
JP (1) JPS62252897A (en)
DE (2) DE3613260A1 (en)
ES (1) ES2006680B3 (en)
NO (1) NO870472L (en)

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GB2217820A (en) * 1988-04-28 1989-11-01 Rheinmetall Gmbh Electrothermal cannon
FR2630821A1 (en) * 1988-04-28 1989-11-03 Rheinmetall Gmbh ELECTROTHERMAL LAUNCHING DEVICE
GB2218495A (en) * 1988-05-13 1989-11-15 Tzn Forschung & Entwicklung Cartridges
EP0346867A2 (en) * 1988-06-16 1989-12-20 DIEHL GMBH &amp; CO. Barrel gun using chemical-electrical hybrid propulsion created by regenerative injection of a propellant agent
GB2229799A (en) * 1989-04-01 1990-10-03 Diehl Gmbh & Co Device for accelerating a projectile
US5042359A (en) * 1988-04-28 1991-08-27 Rheinmetall Gmbh Projectile accelerating device
FR2672047A1 (en) * 1988-09-10 1992-07-31 Diehl Gmbh & Co PROPELLANT AGENT FOR HYBRID WEAPON.
GB2260187A (en) * 1991-10-01 1993-04-07 Tzn Forschung & Entwicklung Electrothermal firing
US6220141B1 (en) * 1995-09-28 2001-04-24 Injectiles Limited Liquid projectile launcher
US10415925B2 (en) 2017-10-24 2019-09-17 Science Applications International Corporation Projectile accelerator with heatable barrel

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AU637019B2 (en) * 1988-10-24 1993-05-13 Brinkmann Corporation, The Switch for portable light source
JPH02127992U (en) * 1989-03-29 1990-10-22
JPH0350498A (en) * 1989-07-14 1991-03-05 Japan Steel Works Ltd:The Missile launcher
DE3924056A1 (en) * 1989-07-21 1991-01-24 Diehl Gmbh & Co Projectile launching device using electrically heated plasma - uses two or more pairs of electrodes generating discharge arcs at rear of projectile

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US3916761A (en) * 1974-01-29 1975-11-04 Nasa Two stage light gas-plasma projectile accelerator

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2630820A1 (en) * 1988-04-28 1989-11-03 Rheinmetall Gmbh DEVICE FOR LAUNCHING PROJECTILES
FR2630821A1 (en) * 1988-04-28 1989-11-03 Rheinmetall Gmbh ELECTROTHERMAL LAUNCHING DEVICE
GB2217820A (en) * 1988-04-28 1989-11-01 Rheinmetall Gmbh Electrothermal cannon
GB2217820B (en) * 1988-04-28 1992-04-08 Rheinmetall Gmbh A weapon.
US5042359A (en) * 1988-04-28 1991-08-27 Rheinmetall Gmbh Projectile accelerating device
GB2218495B (en) * 1988-05-13 1991-11-20 Tzn Forschung & Entwicklung Cartridge for an electrothermal firing device
GB2218495A (en) * 1988-05-13 1989-11-15 Tzn Forschung & Entwicklung Cartridges
US5115743A (en) * 1988-05-13 1992-05-26 Tzn Forschungs- Und Entwicklungszentrum Unterluss Gmbh Propellant casing assembly for an electrothermic projectile firing device
EP0346867A3 (en) * 1988-06-16 1990-09-19 DIEHL GMBH &amp; CO. Barrel gun using chemical-electrical hybrid propulsion created by regenerative injection of a propellant agent
EP0346867A2 (en) * 1988-06-16 1989-12-20 DIEHL GMBH &amp; CO. Barrel gun using chemical-electrical hybrid propulsion created by regenerative injection of a propellant agent
FR2672047A1 (en) * 1988-09-10 1992-07-31 Diehl Gmbh & Co PROPELLANT AGENT FOR HYBRID WEAPON.
GB2229799B (en) * 1989-04-01 1993-05-19 Diehl Gmbh & Co An arrangement for accelerating a projectile by means of a plasma
GB2229799A (en) * 1989-04-01 1990-10-03 Diehl Gmbh & Co Device for accelerating a projectile
US5094141A (en) * 1989-04-01 1992-03-10 Diehl Gmbh & Co. Arrangement for accelerating a projectile through a plasma
US5331879A (en) * 1991-10-01 1994-07-26 Tzn Forschungs-Und Entwicklungszentrum Unterluss Gmbh Electrothermal firing device and cartouche for use in such devices
GB2260187A (en) * 1991-10-01 1993-04-07 Tzn Forschung & Entwicklung Electrothermal firing
GB2260187B (en) * 1991-10-01 1996-01-17 Tzn Forschung & Entwicklung Electrothermal firing device and cartridge
US6220141B1 (en) * 1995-09-28 2001-04-24 Injectiles Limited Liquid projectile launcher
US10415925B2 (en) 2017-10-24 2019-09-17 Science Applications International Corporation Projectile accelerator with heatable barrel
US10724823B2 (en) 2017-10-24 2020-07-28 Science Applications International Corporation Projectile accelerator with heatable barrel
US11187488B2 (en) 2017-10-24 2021-11-30 Science Applications International Corporation Projectile accelerator with heatable barrel
US11920888B2 (en) 2017-10-24 2024-03-05 Science Applications International Corporation Projectile accelerator with heatable barrel

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NO870472D0 (en) 1987-02-06
DE3760053D1 (en) 1989-03-23
JPS62252897A (en) 1987-11-04
DE3613260A1 (en) 1987-10-29
ES2006680B3 (en) 1993-08-01
DE3613260C2 (en) 1989-12-28
NO870472L (en) 1987-10-20
EP0242501B1 (en) 1989-02-15

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