| A Study of the Engraving of the M855 5.56-mm Projectile |
Mar-2009 |
30 pages |
| Authors:
Robert Kaste; Joseph South; Aristedes Yiournas; JOHN BROWN; Jordan Wagner; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
 | The interaction between a small-caliber projectile and its weapon system cannot be readily measured during the launch event. The forces and resulting deformations on the projectile due to engraving are small and localized compared to the ballistic pressure. Consequently, the interaction is inferred from the condition of the projectile after it has exited the barrel. A direct method of examining the engraving force and the resulting projectile deformation is through ... |
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| Launch Survivability Analysis of On-board Components of the Extended Area Protection and Survivability (EAPS) Projectile System |
JUN 2008 |
46 pages |
| Authors:
Michael M. Chen; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| This report focuses on the ability of on-board electronics generally required for precision projectiles to survive pressure waves that occur in early combustion phase for most propelling charges because of pressure imbalance in the chamber. The modeling of pressure waves was achieved by a deterministic transient excitation followed by a stochastic approach. The responses of the on-board electronic components were found to be significant when pressure waves were taken into ... |
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| Environmental Acceptable Medium Caliber Ammunition Percussion Primers |
MAY 2008 |
50 pages |
| Authors:
Michael Ellis; ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER PICATINNY ARSENAL NJ
|
| Percussion primers are used to ignite fixed ammunition propellant charges with a very high functional reliability. In order to achieve this high degree of reliability, extremely sensitive primary explosive compositions are selected as the initiating materials. Medium caliber ammunition percussion primers typically consist of lead styphnate and antimony sulfide. Although highly effective, these heavy material compounds were identified under 40 CFR 401.15 as toxic pollutants and should be replaced or ... |
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| Parametric Study on the Interior Ballistics of 105 and 155 mm Artillery Guns |
MAR 2008 |
|
| Authors:
Vincent Tanguay; DEFENCE RESEARCH AND DEVELOPMENT CANADA VALCARTIER (QUEBEC)
|
 | The interior ballistics code IBHVG2 was used to calculate the muzzle velocity and peak acceleration of projectiles ranging in mass from 10 to 50 kg. The simulations were performed with both 105 and 155 mm guns. These were the C3 and LG1 (105 mm and 52-calibre M777 were also considered. Three propellants were investigated: the triple base M31, and two composite propellants, JA2 and the developmental propellant LCT. For ever ... |
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| Stochastic Analysis of Initial Extended Area Protection and Survivability (EAPS) Projectile |
JUN 2007 |
30 pages |
| Authors:
Michael M. Chen; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
|
| Gun propulsion modeling has been undergoing development for many decades. Because of the great strides in recent development, one has been able to estimate in-bore pressure-time history at a fairly accurate level. However, some underlying assumptions among the models exhibit certain level of uncertainties, such as the time-varying friction between the obturator and bore surface, the granular shape variations of propelling charges, the packaging deviations of each propellant load, etc. ... |
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| Insensitive High-Performance Replacements for RDX in Explosive and Propellant Formulations |
16 MAR 2007 |
44 pages |
| Authors:
Thomas M. Klapoetke; LUDWIG-MAXIMILIANS UNIV MUNICH (GERMANY) DEPT OF CHEMISTRY AND BIOCHEMISTRY
|
| The objective of the proposed research project is to investigate and explore the chemistry of neutral (covalent) high-nitrogen compounds and high-nitrogen salts as potential energetic ingredients for gun propellant charges and replacements for RDX. The new high-nitrogen compounds and salts should be less environmentally hazardous, have no greater sensitivities, and have equal or better performance. |
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| Combustion Light Gas Gun Technology Demonstration |
23 JAN 2007 |
148 pages |
| Authors:
D. Kruczynski; D. Massey; R. Milligan; E. Vigil; B. Landers; M. Meneguzzi; UTRON INC MANASSAS VA
|
| The Combustion Light Gas Gun, or CLGG, has been investigated for over ten years. During this time, the research has shown that the technology provides a minimum of 30% more muzzle energy than advanced solid propellent guns which translates to significant advantages in range and/or throw weight. For the Navy Barrage round fired from a 155mm bore CLGG, the predicted range is up to 200 nm, sufficient to provide effective ... |
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| IBHVG2: Mortar Simulation With Interior Propellant Canister |
MAR 2006 |
73 pages |
| Authors:
Ronald D. Anderson; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| A method has been implemented for the Interior Ballistics of High Velocity Guns, Version 2 (IBHVG2) simulation program to model mortar systems, including an enclosed high-pressure igniter canister. The application allows initial pressurization of the canister until interior pressure reaches a force high enough to rupture a burst diaphragm. Combustion gases are then released to the larger (main) chamber to accelerate the projectile or to ignite additional propellant for the ... |
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| The Noble-Abel Equation of State: Thermodynamic Derivations for Ballistic Modelling |
NOV 2005 |
|
| Authors:
Ian A. Johnston; DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) WEAPONS SYSTEMS DIV
|
| Accurate modelling of gun interior ballistics promotes more efficient gun and propelling charge design. In order to simulate interior ballistic flowfields, such models require a description of the thermodynamic behaviour of the propellant gas. The Noble-Abel equation provides a simple and reasonably accurate equation of state for propellant gases at the high densities and temperature experienced in guns. Most computational fluid dynamics-base ballistics models, however, require additional thermodynamic functions which ... |
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| A Study of Projectile Response to Ballistics Environment |
NOV 2005 |
24 pages |
| Authors:
Stephen E. Ray; Michael J. Nusca; James F. Newill; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS TECHNOLOGY DIRECTORATE
|
| The U.S. Army Research Laboratory s interior ballistics code, ARL-NGEN3, is a state-of-the-art modeling tool providing interior ballistics predictions and flowfield simulations of the ignition, flamespreading, and combustion of solid-propellant charges used to launch projectiles from guns. Modern solid mechanics codes such as DYNA3D and EPIC can complement the ARL-NGEN3 code by providing a capability to predict the mechanical response of the projectile to the unsteady, high-pressure environment within the ... |
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| Understanding and Predicting Gun Barrel Erosion |
AUG 2005 |
|
| Authors:
Ian A. Johnston; DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION EDINBURGH (AUSTRALIA) WEAPONS SYSTEMS DIV
|
| The Australian Defence Force will soon have to contend with gun barrel erosion issues arising from the use of new low-vulnerability gun propellants, the acquisition of new ammunition and gun systems, and possible modifications to existing propelling charge designs. A critical, technical review of advances is gun barrel erosion research, mitigation, and assessment over the last fifteen years is presented. Known and postulated erosion mechanisms, obtained through recent experimental and ... |
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| Development of a Lightweight Ammunition Concept Using an Alternative Case Material and Enhanced Propellant |
MAY 2005 |
15 pages |
| Authors:
Todd Cloutier; Lucian Sadowski; VERITAY TECHNOLOGY INC EAST AMHERST NY
|
| Soldiers are carrying additional high technology equipment to increase effectiveness at additional weight. To achieve a significant weight reduction and to enhance soldier's effectiveness, the Joint Service Small Arms Program Office is developing a Lightweight Family of Weapons and Ammunition. The ammunition concept developed during this contract combines a lightweight cartridge case and a high-density consolidated propellant charge that substantially reduces the cartridge volume. This report describes the lightweight cartridge ... |
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| Determination of the Basis for Temperature Compensation in ETC Ignited Solid Propellant Guns |
DEC 2004 |
3 pages |
| Authors:
R. A. Pesce-Rodriguez; R. A. Beyer; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| A series of experiments and reanalysis of previously published results has led to the discovery of the key interaction between the plasma of an electrothermal igniter and the gun propellant in large caliber cannon. It has been shown that the intense visible and near infrared light from the plasma discharge create a greatly enhanced surface area for a limited fraction of the propelling charge. This extra surface area, promptly ignited ... |
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| Modular Artillery Charge System (MACS) Compatibility with the 155-mm M114 Towed Howitzer |
OCT 2004 |
21 pages |
| Authors:
William Zepp; Richard Cirincione; ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER PICATINNY ARSENAL NJ
|
| The M114 155-mm towed howitzer has been obsolete and purged from the U.S. Army inventory, but is still in use at Yuma Proving Ground for test purposes. The Modular Artillery Charge System (MACS) replaces the bag M3 and M4 charges, which are being exhausted in the Army inventory. The MACS was not developed to be compatible with the M114 howitzer and was not tested. To support continued operations at the ... |
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| Generic Extruded Propellant Grain Surface and Volume Calculations |
AUG 2004 |
98 pages |
| Authors:
Ronald D. Anderson; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| Experimental propelling charges that have non-standard extruded granular shapes require calculations of available burning surface area in order to be simulated by interior ballistic (IB) modeling applications. Formerly, extensive hand calculations or development of a one-of-a-kind form function was necessary in order to analyze the changes in surface area whenever non-standard grain geometries were to be used in experimental gun propelling charges. A quick. easy-to-use computer program has been developed ... |
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| Eliminating Propellant Bag Deterioration for the 105-mm M67 Propelling Charge |
JUL 2003 |
48 pages |
| Authors:
Adriana L. Eng; ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER PICATINNY ARSENAL NJ WARHEADS ENERGETICS AND COMBAT SUP
|
| The rayon propellant bags of the 105-mm M67 propelling charge were observed to deteriorate in short periods of time to the extent that the bags can no longer safely hold the propellant. An engineering study was conducted to resolve this problem by replacing the rayon propellant bags with lightweight acrylic propellant bags. These acrylic bags have satisfactorily passed material compatibility tests, simulated rough handling and transportation tests as well as ... |
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| Dynamic Rupture Strength of Lacquer Seal in Flash Tube of 30-mm Ammunition for the M230 Cannon |
MAY 2002 |
22 pages |
| Authors:
Stephen L. Howard; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| The M788, M789, and M799 30 mm ammunition use a flash tube to augment the ignition stimulus of the primer and to provide an ignition source for the propellant bed in each round. The flash tube must be fast acting, provide abundant hot gases/particles, and increase the pressure in the propellant bed sufficiently that the initial burn rate of the propellant in the bed is high enough to propel the ... |
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| 38TH JANNAF Combustion Subcommittee Meeting. Volume I |
APR 2002 |
|
| Authors:
Ronald S. Fry; Debra S. Eggleston; Mary T. Gannaway; CHEMICAL PROPULSION INFORMATION AGENCY COLUMBIA MD
|
| This volume, the first of two volumes, is a collection of 55 unclassified/unlimited-distribution papers which were presented at the Joint Army-Navy-NASA-Air Force (JANNAF) 38th Combustion Subcommittee (CS), 26th Airbreathing Propulsion Subcommittee (APS), 20th Propulsion Systems Hazards Subcommittee (PSHS), and 2nd Modeling and Simulation Subcommittee. The meeting was held 8-1 2 April 2002 at the Bayside Inn at The Sandestin Golf & Beach Resort and Eglin Air Force Base, Destin, Florida. ... |
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| Dynamic Vivacity and Its Application to Conventional and Electrothermal- Chemical (ETC) Closed Chamber Results |
DEC 2001 |
57 pages |
| Authors:
William F. Oberle; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| Historically, dynamic vivacity has been used extensively in propellant lot acceptance. More recently, dynamic vivacity has been used in the analysis of closed chamber experimental data to assess propellant grain surface area behavior during combustion. The objective of this report is to: (a) examine the physical meaning of dynamic vivacity; (b) theoretically explore the behavior of dynamic vivacity for conventionally ignited charges of various geometries, including layered propellant charges; and ... |
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| Flame Spreading and Combustion Behavior of Gun Propellants under High Loading Density Conditions |
19 JUN 2001 |
2 pages |
| Authors:
Kenneth K. Kuo; PENNSYLVANIA STATE UNIV UNIVERSITY PARK
|
| The ballistic performance of tank gun systems can be increased by using high loading density propellant charges. However, the exact dependency of the muzzle velocity on loading density is not known. Furthermore, there are some uncertainties associated with combustion behavior under extremely high loading density conditions. The burning rate of the propellant and the flame-spreading rate along the propellant charge could be affected by the close proximity of its neighboring ... |
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| Extended-Range 5-in Navy Gun: Theoretical Thermal and Erosion Investigations |
MAY 2001 |
41 pages |
| Authors:
Paul J. Conroy; Paul Weinacht; Michael J. Nusca; Kirk Rice; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| Barrel heating and erosion concerns for the Navy are being brought to light by new extended-range munitions. These munitions have, in general, higher performance requirements and use new propellants. In light of these concerns, the following investigation was performed to determine the thermal and erosion characteristics of the current and proposed munitions. In this report, the calculation methodology governing both the thermal and erosion work is described. Six thermal scenarios ... |
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| Interior Ballistics Modeling: Extensions to the One-Dimensional XKTC code and Analytical Studies of Pressure Gradient for Lumped Parameter Codes |
FEB 2001 |
184 pages |
| Authors:
Paul S. Gough; GOUGH (PAUL) ASSOCIATES INC PORTSMOUTH NH
|
| We describe a number of extensions to the XNOVAKTC (XKTC) Code, a model of interior ballistic phenomena based on a numerical solution of the governing equations for one-dimensional, multi-phase flow. We also present some analytical formulations for the pressure gradient in a gun in a form suitable for incorporation into a lumped parameter interior ballistics model. In XKTC, the flow resistance formula for stacked granular propellant is extended to account ... |
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| An Economic Analysis of Re-Locating the Physical Evaluation Board's Formal Bearing Panel from Bethesda, MD to Portsmouth, VA |
DEC 2000 |
54 pages |
| Authors:
Terry M. Surdyke; Joseph M. Vitelli; NAVAL POSTGRADUATE SCHOOL MONTEREY CA
|
| The Naval Council of Personnel Boards requested an economic analysis of the potential re-location of the their formal Hearing Panel from Bethesda, MD to Portsmouth, VA. The goal of this thesis is to assist the Director, Naval Council of Personnel Boards, by providing a formal economic analysis. OMB circular A-94 is used as the guideline in conducting this thesis. Therefore, as is prescribed, the net present ... |
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| Electrothermal-Chemical (ETC) Closed-Chamber Interrupted-Burning Tests With JA2 and M30 Solid Propellants |
NOV 2000 |
41 pages |
| Authors:
Avi Birk; Miguel Del Guercio; Amy Kinkennon; Douglas E. Kooker; Pamela Kaste; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| Interrupted- and noninterrupted-burning tests were conducted with cylindrical perforated grains of JA2 and M30 in a closed bomb with a loading density of approximately 0.2 g/cu cm. Both conventional black-powder and plasma igniters were used. The plasma igniter was an ablating capillary, and the electrical energy density was about 0.7 kJ/g of propellant. The diameters of the collected grains yielded the actual burn distance at the time of the interrupted ... |
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| 120-MM Ammunition Feasibility Assessment for Light Artillery |
MAR 2000 |
31 pages |
| Authors:
Stephen G. Floroff; Bryan L. Salatino; ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER PICATINNY ARSENAL NJ
|
| A study was undertaken to determine the feasibility of a 120-mm solution for future light artillery systems using existing U.S. 120-mm ammunition. By combining existing U.S. 120-mm mortar and tank ammunition, a complete direct and indirect firing solution is created without significant ammunition development costs. Improvements in lethality over 105-mm artillery ammunition as well as a reduction in weight, size, and logistics burden over ... |
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| Rocket Motor With Desensitizer Injector |
04 JAN 2000 |
10 pages |
| Authors:
John F. Kunstmann; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A rocket motor having a desensitizing mechanism for preventing explosion or energetic burning during slow cook-off is provided. The rocket motor includes a case contained rocket propellant with a desensitizing assembly attached forward of the propellant charge. The desensitizing assembly is formed with an enclosure containing a desensitizing fluid, connected to the interior of the rocket motor by a tube which is sealed by a heat activated plug. The heat ... |
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| 155-MM Howitzer Malfunction Investigation: A Laboratory Study of the Igniter Train Operation |
NOV 1999 |
63 pages |
| Authors:
Kevin J. White; Roger E. Bowman; Ingo W. May; Richard Hartman; Emerson V. Clarke; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| On 20 December 1974, two hangfires occurred in a developmental 155-mm howitzer at Aberdeen Proving Ground (APG), MD. The second hangfire was accompanied by a rupturing of the howitzer breech. As a result of this, a laboratory study was initiated to uncover possible causes leading to the malfunction. The study involved testing of various components of the igniter train singly and in various combinations under a ... |
|
| Proof-Testing the Physics Applications Inc. 50-mm Laboratory Gun |
SEP 1998 |
67 pages |
| Authors:
Graham F. Silsby; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| Reported here is the effort to proof-test a newly acquired breech and assembly for the 5O-mm high-pressure powder gun for terminal ballistic testing in the U.S. Army Research Laboratory's (ARL) Range 309A (R309A). The performance of a custom-produced 0.012-inch web 7-perforation M30 propellant in routine use there was modeled by the ARL-developed one dimensional (1-D) interior ballistic code IBHVG2 to select a propelling charge mass (CM) that ... |
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| Recoilless and Gas-Free Projectile Propulsion |
23 APR 1998 |
12 pages |
| Authors:
Matthew J. Sanford; Larry E. Crabtree; Roger L. Ellis; James F. Cahill; OFFICE OF NAVAL RESEARCH ARLINGTON VA
|
| A recoilless and gas-free projectile propulsion device is provided. A hollow pressure vessel is sealed on a first end to an AFT end of a projectile in a launch tube. The pressure vessel is further open on a second end. A propellant charge filled pressure chamber, defined in a forward portion of the pressure vessel, has holes venting to the pressure vessel AFT thereof. A piston, sealed within the pressure ... |
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| Making More Informed Decisions in Your Watershed When Dollars Aren't Enough |
JAN 98 |
21 pages |
| Authors:
Kenneth Orth; Ridgely Robinson; William Hansen; ARMY ENGINEER INST FOR WATER RESOURCES FORT BELVOIR VA
|
| Decisions regarding potential investments in watershed resources can leave decision making comparing 'apples to oranges' when the costs of watershed improvements are measurable in dollars but the benefits are not. While traditional benefit cost analysis simply won't work in these situations, the tools of cost effectiveness analysis and incremental cost analysis can help by providing information to support decision making. This paper presents a general analytical procedure for cost effectiveness ... |
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| Effect of Propellant Grain Dimensions on Progressivity |
OCT 97 |
52 pages |
| Authors:
Kevin J. White; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| For high loading density propelling charges, propellant grain geometry design is employed to improve ballistic efficiency. Specifically, grains that have 7, 19 and even 37 perforations are used. These grains all have progressive geometries, i.e., surface areas that increase as the propellant burns. This report studies the effect of grain dimensions on progressivities of the 7- and 19-perforation geometries. Calculations show that for maximum progressivity, the ratio of grain diameter ... |
|
| 34TH JANNAF Combustion Subcommittee Meeting, Volume 1, Pratt & Whitney and Palm Beach Gardens Marriott West Palm Beach, FL, 27 - 30 October 1997 |
OCT 1997 |
|
| Authors:
Ronald S. Fry; Mary T. Gannaway; CHEMICAL PROPULSION INFORMATION AGENCY COLUMBIA MD
|
| Volume I is a compilation of 55 unclassified/unlimited distribution papers presented at the 1997 meeting of the JANNAF 34th Combustion Subcommittee (CS) held jointly with the Propulsion Systems Hazards Subcommittee (PSHS), and the Airbreathing Propulsion Subcommittee (APS) on 27-30 October 1997 at the Palm Beach Gardens Marriott Hotel in West Palm Beach, Florida. Proceedings of the CS, PSHS, and APS meetings are published separately by CPIA. The CS meeting proceedings ... |
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| The Application of Electrothermal-Chemical (ETC) Propulsion Concepts to Reduce Propelling Charge Temperature Sensitivity |
SEP 97 |
52 pages |
| Authors:
William Oberle; Kevin White; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| The concept of the propelling charge temperature coefficient and its impact on gun performance is explored. Ballistic factors, in addition to the propellant burn rate dependence on initial temperature that often increases the magnitude of the propelling charge temperature coefficient, are identified and discussed. Techniques for moderating the effects of the propelling charge temperature coefficient are presented, with special emphasis on the utilization of electrothermal- chemical (ETC) concepts. |
|
| A Ballistic Compressor-Based Setup for the Visualization of Liquid Propellant Jet Combustion Above 100 MPa |
SEP 97 |
44 pages |
| Authors:
Avi Birk; Douglas E. Kooker; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| This report describes the components and operation of an experimental setup for the visualization of liquid propellant (LP) jet combustion at pressures above 100 MPa. The apparatus consists of an in-line ballistic compressor and LP injector. The ballistic compressor, based on a modified 76-mm gun, provides high pressure (55 MPa) clear hot gas for the jet ignition. A piston (projectile) is fired toward a test chamber beyond the barrel's end, ... |
|
| Plasma Characterization for Electrothermal-Chemical (ETC) Gun Applications |
SEP 97 |
50 pages |
| Authors:
Kevin J. White; Gary L. Katulka; Thuan Khong; Kevin Nekula; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| Successful application of the electrothermal chemical (ETC) propulsion concept will require an understanding of the propagation and interaction of plasmas in propellant beds. This information is necessary to exploit the ignition and combustion control that is possible with plasmas. Toward this end, an experimental program was designed to gain an understanding of the functioning of the plasma and the interaction of the plasma with the propelling charge, and family a ... |
|
| Proposed Quantity-Distance Rules for Hazard Division 1.2 Ammunition |
14 MAR 97 |
38 pages |
| Authors:
M. M. Swisdak Jr.; J. M. Ward; M. J. Gould; NAVAL SURFACE WARFARE CENTER INDIAN HEAD DIV MD
|
| An extensive hazard division (HD) 1.2 open air testing program has now been completed. A test program investigating in-structure HD 1.2 effects is currently underway. The results of these programs and a literature survey form the basis of a database of MD 1.2 effects. Currently, for quantity distance purposes, HD 1.2 ammunition is treated differently than HD 1.1 items. The database of HD 1.2 effects suggests that this difference is ... |
|
| Safety Review of M109A3 Howitzer Accident |
Aug-1996 |
5 pages |
| Authors:
Lyn Little; ARMY TECHNICAL CENTER FOR EXPLOSIVES SAFETY SAVANNA IL EXPLOSIVES SAFETY TEST MANAGEMENT DIV
|
| In October 1995, a fire occurred in an M109A3 howitzer while the crew was conducting live fire training. The fire consumed the full combat load of propelling charges onboard the vehicle. One injury (a broken nose) was sustained as the crew exited the vehicle. A Board of Investigation (BOI) consisting of members from the U.S. Army Safety Center (USASC) and U.S. Army Technical Center for Explosives Safety (USATCES) was convened ... |
|
| Semiconductor Bridge Initiators Igniting Multicomponent Propelling Charges |
JUN 96 |
32 pages |
| Authors:
Stephen L. Howard; Lang-Mann Chang; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| Safe operation of a gun system incorporating multicomponent charges requires a good ignition system. One such proposed system for large-caliber guns involves the use of semiconductor bridge initiators (SCBIs) to commence the interior ballistic cycle. This simulator study demonstrated the feasibility of using SCBIs to simultaneously ignite multicomponent propelling charges. The flamespread simulator (76-mm I.D.) at the U.S. Army Research Laboratory, at Aberdeen Proving Ground, MD, was used to simulate ... |
|
| Ballistic Effects of Ignition Stimulus in High-Performance Tank Ammunition |
MAY 96 |
40 pages |
| Authors:
Lang-Mann Chang; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| Ballistic effects of ignition stimulus in a high-performance tank propelling charge are studied through the use of a two-phase flow computer code, XKTC. The studies are conducted with an array of generic igniters that have output rates that vary along the charge length. Performance evaluations of the igniters are based on their resultant pressure behavior in the gun chamber, muzzle velocity, intergranular stress level, and other related variables. Results provide ... |
|
| High-Mass Launch Capability Development for the U.S. Army Research Laboratory's 5O-mm High-Pressure Powder Gun (Range 3O9A) |
APR 96 |
97 pages |
| Authors:
Graham F. Silsby; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| Documented here are improvements to the 50-mm high-pressure powder gun system in the U.S. Army Research Laboratory's (ARL's) terminal ballistic Range 309A. It was designed for high velocity, achieved by large charge-to-mass (C-M) ratios and a long navel (120 calibers). The goal here was to maximize performance with C-M ratios near 1. This was achieved by a series of incremental improvements to gun and sabot hardware and to priming and ... |
|
| General Toxicity/Reproductive Toxicity Screen of Modular Artillery Charge System (XM232) Administered in the Diet of Sprague-Dawley Rats |
JAN 1996 |
48 pages |
| Authors:
J. S. Eggers; E. R. Kinkead; M. L. Feldmann; R. E. Wolfe; C. D. Flemming; MANTECH-GEOCENTERS JOINT VENTURE DAYTON OH
|
| An artillery propellant under development by the US Army is a granular mixture of 98% nitrocellulose, nitroglycerine, nitroguanidine, and <2% cryolite and graphite. The propellant, Modular Artillery Charge System, or MACS, consists of a single increment of propellant charge contained within a rigid, combustible casing. As part of the process to develop environmental and health effects criteria, a 90-day modified Screening information Data Set reproductive assay was performed. Male and ... |
|
| Correlation of the Failure Modulus to Fracture-Generated Surface Area in Uniaxially Compressed M43 Gun Propellant |
OCT 95 |
42 pages |
| Authors:
Robert J. Lieb; ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
|
| M43, a large-caliber, nitramine composite propellant, was tested in uniaxial compression at a rate of 100/s to 50.0% strain at temperatures from -40 deg to 60 deg C. Similar tests were performed to 20.0 and 10.0% strain. Failure modulus values (defined below) were measured and sufficient propellant was damaged so that closed bomb firings could be performed, which determined how the grain damage affected the pressure generation at ballistic pressures. ... |
|
| Ammunition Cartridge with Reduced Propellant Charge. |
14 AUG 1995 |
12 pages |
| Authors:
Fred W. Watson Jr; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| An ammunition cartridge having a reduced propellant charge and an initial reduced cartridge volume is provided. The cartridge volume is reduced by partially filling the cartridge case with a foam filler using a male mold form. The male mold form is sized to provide the desired propellant volume and tapered to maintain the desired cartridge pressure during the propellant burn. Alternately, the foam filler may be formed externally and inserted ... |
|
| Initial Development of Core Module of Next Generation Interior Ballistic Model NGEN. |
JUN 1995 |
118 pages |
| Authors:
Paul S. Gough; GOUGH (PAUL) ASSOCIATES INC PORTSMOUTH NH
|
| Gun Propulsion systems of current interest include the traditional solid propellant (SP) designs, regenerative liquid propellant (RLP) designs and various electrothermal-chemical (ETC) designs. Presently, each of these systems is simulated by dedicated computer codes which are not readily extendible to the other systems. It is a goal of the Army Research Laboratory to develop a Next- Generation code which subsumes the capabilities of all existing codes into a structure which ... |
|
| Propelling Charges |
25 MAY 95 |
20 pages |
| Authors:
ARMY TEST AND EVALUATION COMMAND ABERDEEN PROVING GROUND MD
|
| This ITOP describes test procedures for determining propellant charge weight and effects of extreme temperatures on propelling charge performance. |
|
| Range-Finding Study for a Reproductive Screen of Modular Artillery Charge System (XM231/XM232) Administered in the Diet of Sprague-Dawley Rats |
APR 95 |
29 pages |
| Authors:
E. R. Kinkead; M. L. Freedman; R. E. Wolfe; C. D. Fleming; D. L. Pollard; MANTECH ENVIRONMENTAL TECHNOLOGY INC DAYTON OH
|
| An artillery propellant under development b the U.S. Army is a granular mixture of nitrocelinlose, nitroglycerin, nitroguanidine, ethylcentralite, cryolite, and graphite. The propellant, Modniar Artillery Charge System or MACS, consists of a single increment of propellant charge contained within a rigid combustible casing. Nitrocellulose, nitroglycerin, and nitroguanidine make up greater than 98% of the total propellant mixture. As part of the process to develop environmental and health effects criteria, a ... |
|
| Performance Oriented Packaging (POP) Testing of Charge, Propelling, 155 MM Projectile, M203A1, Packed One (1) per PA103 Square Rim Metal Ammunition Container |
08 AUG 94 |
|
| Authors:
Raymond J. Siroy; ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER PICATINNY ARSENAL N J
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| This Performance oriented Packaging (POP) report is for the Propelling Charge, 155MM Projectile, M203Al, packed one (1) per PA103 Square Rim Metal Ammunition Container in accordance with drawing 9354642. This report describes the results of testing conducted on a similar packaging which is used as an analogy for this item. Performance Oriented Packaging, Ammunition Packaging, PA103 Metal Ammunition Container, Packaging |
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| Performance Oriented Packaging (POP) Testing of M204 Propelling Charges, Packed One Thousand Seven Hundred Twenty-Eight (1728) Per Fiberboard Box |
06 APR 94 |
6 pages |
| Authors:
Oltea L. Bogdan; ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER PICATINNY ARSENAL N J
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| This Performance Oriented Packaging (POP) report is for the Charges, Propelling, M204 packed in fiberboard, box in accordance with ARDEC drawing 9313703. This report describes the results of testing conducted on a similar package by analogy for this item. Performance oriented packaging, DOD POP HMTR/ AYD 92-026, Fiberboard box, Analogy. |
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| Performance Oriented Packaging (POP) Testing of Charge, Proof, 155MM, PXR-6297A1, Packed One Per PA 103 Square Rim Metal Ammunition Container |
17 DEC 93 |
4 pages |
| Authors:
Raymond J. Siroy; ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER PICATINNY ARSENAL N J
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| This Performance Oriented Packaging (POP) report is for the Proof Charge, 155MM, PXR-6297 packed one per PA 103 Square Rim Metal Ammunition Container in accordance with drawing 12902708. This report describes the results of testing conducted on a similar packaging which is used as an analogy for this item. Performance oriented packaging, PA 103 Metal ammunition container, Ammunition packaging, Packaging |
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| Performance Oriented Packaging (POP) Testing of Charge, Propelling, 8 inch, M188A1, Packed one per PA92 Square Rim Metal Ammunition Container |
29 NOV 93 |
7 pages |
| Authors:
Raymond J. Siroy; ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER PICATINNY ARSENAL N J
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| This Performance Oriented Packaging (POP) report is for the Propelling Charge, 8 inch, M188A1, packed one per PA92 Square Rim metal Ammunition Container in accordance with drawing 9331255. This report describes the results of testing conducted with simulated propellant. Performance Oriented Packaging, Ammunition packaging, PA92 Ammunition metal container, Packaging |
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Reports by Keyword(s)
PROPELLING CHARGES
