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PICATINNY ARSENAL DOVER NJ AMMUNITION DEVELOPMENT AND ENGINEERING DIRECTORATE

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Works: 22 works in 22 publications in 1 language and 22 library holdings
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Publications about PICATINNY ARSENAL DOVER NJ AMMUNITION DEVELOPMENT AND ENGINEERING DIRECTORATE
Publications by PICATINNY ARSENAL DOVER NJ AMMUNITION DEVELOPMENT AND ENGINEERING DIRECTORATE
Most widely held works by PICATINNY ARSENAL DOVER NJ AMMUNITION DEVELOPMENT AND ENGINEERING DIRECTORATE
SAFETY HAZARD CLASSIFICATION OF WATER-WET EXPLOSIVES ( file )
1 edition published in 1965 in English and held by 1 library worldwide
Eithteen water-wet explosives were studied to determine whether they could support detonations. Of the 18 explosives tested, 15 sustained detonations when saturated with water. All explosives tested were found to sustain detonations at water levels that could be encountered in manufacturing operations following the filtering operation. Therefore, the filtered explosives should be assigned a safety hazard classification of Class 9
True average size of a fragment between any chosen limits ( Book )
1 edition published in 1963 in English and held by 1 library worldwide
The object of this study was to develop a method for determining the correct average fragment size, between any chosen limits, of a range of sizes. Ordinarily, the arithmetic average of the lower and upper limits of a grouping is assumed to be the average fragment weight of that group. According to Mott's distribution, the smaller the fragment, the greater is the number of fragments. Therefore the arithmetic average of any grouping of fragment sizes would be larger than the true average. By writing an expression for the average size of a fragment in an interval between m and m delta m (where delta m is small), allowing delta m to approach a limit of zero, and substituting Mott's equation in the resulting differential and integrating, we get a generalized expression for the true average size of a fragment between any chosen limits. (Author)
EVALUATION OF INORGANIC NITRATES AS HEAT TEST STANDARDS. ICRPG WORKING GROUP ON ANALYTICAL CHEMISTRY. ROUND ROBIN NO. 24 ( file )
1 edition published in 1965 in English and held by 1 library worldwide
Al(NO3)3.9H2O and Cu(NO3)2.3H2O are suitable for use as standards in the potassium iodide and methyl violet heat tests. In addition to being more stable than the organic nitrates currently used as standards, these inorganic nitrates are safer to store and easier to obtain at a prescribed level of purity. Standardization of the heat test can be improved if inorganic nitrates are distributed with the test papers along with a statement of the test time at a given temperature
Relative shielding effectiveness of cables and connectors ( Book )
1 edition published in 1964 in English and held by 1 library worldwide
Shielding effectiveness tests were conducted on various types of 32 conductor cables. These tests were divided into two distinct classes, conductive and radiative, within the ranges of the facility capability. Where it was impractical to expose the cables to high intensity electromagnetic radiation (below 100 Gc), currents were conductively introduced into the shield; from 4 Mc up to 10 Gc, the cables were irradiated with RF energy. Data were obtained by monitoring conductor pickup with a tuned field intensity meter. It was determined that the modified Bendix JT connector, which carries the enclosing shield through the mated conn ctors via spring finger contacts, provided approximately 20 db improvement in shielding effectiveness when compared to the standard JT connector, over the entire frequency range tested. It is emphasized that the tests which were performed here highlighted the instrumentation problems in measuring RF leakage. Above 300 Mc the data from the various cables start to converge, with convergence being accentuated above 5 Gc. Inability, at this time, to evaluate the cause of data convergence masks the true shielding effectiveness of the cable assemblies above 300 Mc. (Author)
Development of a rocket motor for the xm7 aircraft capsule ejection catapult ( Book )
1 edition published in 1964 in English and held by 1 library worldwide
A novel side thrust rocket motor was developed for ejecting the escape capsule from high performance aircraft. A nitrocellulose base propellant charge was developed to meet the ballistic performance requirements. The rate of rise of thrust was controlled during the ignition phase so that the capsule would not be subjected to more than 250 G/sec rate of change of acceleration. This was successfully accomplished by a special grain-inhibiting technique in which the exposed surfaces were incrementally inhibited by a dip method. (Author)
Single-chip integrated circuit electronic timer for artillery and other ordnance applications phase i ( Book )
1 edition published in 1967 in English and held by 1 library worldwide
This report summarizes progress in designing a single-chip Integrated Circuit Electronic Timer for Artillery and other Ordnance fuzes. A single MOST Integrated Circuit with over 365 transistors has been designed. Less than 20 electronic parts are required for the entire timer
EXPERIMENTAL INVESTIGATION OF ANTENNA CHARACTERISTICS OF RANDOM LENGTH WIRES WHEN TERMINATED IN A TWO-OHM LOAD ( file )
1 edition published in 1964 in English and held by 1 library worldwide
This report describes the tests conducted on five specific wire configurations with blasting caps attached, for the purpose of determining their antenna characteristics. These configurations were formed from insulated wire similar to that furnished with M6 Blasting Caps. The five configurations were tested to determine their receiving characteristics by measuring (with suitable instrumentation) the current flowing in the bridgewire of the blasting cap as the result of electromagnetic energy abstracted by the antenna from the impinging field
FEASIBILITY STUDY OF UNCRIMPED CASE CARTRIDGE, 40MM (FOR M79 LAUNCHER) ( file )
1 edition published in 1963 in English and held by 1 library worldwide
During a variability study on the 40mm Cartridge for the M79 Launcher, it was found that improved functional characteristics resulted when cartridges were assembled with uncrimped cases. Because a problem existed with crimped cases becoming stuck in the launcher, tests were conducted to determine the feasibility of modifying unserviceable cases to eliminate the crimping. Tests indicated that the unserviceable cases can be decrimped and that uncrimped cases can be used with functional and economic advantages
Automated manufacturing of electric detonators ( Book )
1 edition published in 1964 in English and held by 1 library worldwide
A flexible production line designed to mass produce all types of electric detonators -- both button and wire-lead type with either a carbon or wire bridge -- is in the advanced stages of development. This production line consists of three highly automated machines and includes automatic bridging, assembly, transfer, inspection and packaging operations. The universal machines are expected to produce electric detonators at less than half the cost and with higher quality, reliability and safety, and with a shorter lead time than is possible with present methods. Deciding when to stop development of new machine design ideas and recognition of the need for product redesign are two corollary problems of automation development programs which are cited as being important considerations in the timely success of such programs. (Author)
ESTIMATING THE MEAN AND STANDARD DEVIATION FROM A BRUCETON STATISTICAL ANALYSIS ( Book )
1 edition published in 1966 in English and held by 1 library worldwide
The maximum likelihood equations used to determine estimates of the mean and standard deviation for the Bruceton method of statistical analysis were solved numerically. A digital computer algorithm was developed to reduce the time associated with the numerical calculations. The method of successive approximations (Newton-Raphson method) was suitable. Test data was evaluated to determine the relative difference between values of the means and standard deviation as obtained from the numerical solution of the maximum likelihood equations and as obtained from formulae approximating these equations. Results of the analysis showed that the differences between means were slight while those between standard deviations were more pronounced. Calculated high and low probability levels, because of their dependence on the mean and standard deviation, differed widely from one method of calculation to the other. The analysis also showed that the most adverse effects occurred for the smallest samples. Because the maximum likelihood equations yield better estimates of the mean and standard deviation than can be obtained from equations approximating them -- especially for small samples -- solution of the maximum likelihood equations by the Newton-Raphson method is advocated for determining the best estimates of the population mean and standard deviation
Development of rf-protected electro-explosive devices ( Book )
1 edition published in 1964 in English and held by 1 library worldwide
An investigation was conducted to alleviate the possibility of premature initiation or change in reliability of an electro explosive device (EED) due to radio frequency (RF) energy. This was accomplished by substituting a plug composed of RF absorbing material in place of the usual plastic sealing plug through which the lead wires enter the EED. To date, the T24E1, M36A1, XM66E2, T77, T77 conductive mix, M51 Detonators, the M2 Squib, the M6 Blasting Cap and the MK2 MOD 0, MK7 MOD 0 Ignition Elements have been provided with the phosphatized powdered iron attenuating plugs
ESTABLISHMENT OF SAFETY DESIGN CRITERIA FOR USE IN ENGINEERING OF EXPLOSIVE FACILITIES AND OPERATIONS ( Book )
1 edition published in 1966 in English and held by 1 library worldwide
This report presents a summary of activities from January-December 1965 on the supporting studies to establish a Safety Design Criteria Program under the technical management of Picatinny Arsenal. Work performed in these areas is described: A model scale slab test program (1/3 and 1/10 scale) to investigate the response of reinforced concrete to blast loads; a model scale bay test program to evaluate the explosive capacity of a bay structure and to establish the validity of scaling; a 1/3 scale modified C-13 cubicle test to demonstrate the use of new design and construction techniques; a full-scale test program to complete the investigation for compartmenting igloos for safe storage of small weapons, and development of new impulse curves in a cubicle type structure
Test program to establish an acceptable non-proprietary ignition charge for the m6 electric blasting cap ( Book )
1 edition published in 1964 in English and held by 1 library worldwide
This program was prepared to select and establish acceptability of a suitable dry-loaded, nonproprietary ignition charge for the M6 Electric Blasting Cap. Weight limits and consolidating pressures for the selected ignition charge will be established and verified through tests involving the determination of ALL FIRE and NO FIRE currents and the ability of the caps to fire when connected in a series circuit
RESPONSE OF EXPLOSIVE TO FRAGMENT IMPACT ( Book )
1 edition published in 1966 in English and held by 1 library worldwide
This phase of the Safety Design Criteria Program deals with the analytical and experimental determination of the sensitivity of high explosives and high energy propellants to impact by primary and secondary fragments
Process control methods for determining small amounts of moisture in pyrotechnics. i. electrolytic hygrometer ( Book )
1 edition published in 1965 in English and held by 1 library worldwide
A project designed to develop process control methods for determining the moisture content of pyrotechnics is in progress. The first stage of this project involved a survey of commercially available instruments. This report describes the results of the survey and gives a detailed evaluation of the electrolytic hygrometer, the instrument considered most promising. Limited data obtained with other instruments is presented but further work is planned since they appear to offer advantages not attainable by the electrolytic hygrometer. (Author)
INVESTIGATION OF THE CAUSE OF AN EXCESSIVE DUD RATE OF CARTRIDGE, 40MM, HE: M406, LOT MA-10-3 ( file )
1 edition published in 1963 in English and held by 1 library worldwide
A 576-round firing test was conducted to determine the cause of the high dud rate of Cartridge, 40mm, HE: M406 (Lot MA-10-63) with Fuze, M551 (Lot MHR-20-3). Twenty-four dud projectiles were recovered and disassembled. Inspection of the fuzes revealed eight unarmed, seven partially armed, two with defective firing pins, and seven with indentations in their detonators. The overall dud rate of the 576 rounds was 4.34%. There is no significant dif ference between the dud rate of the test sample and the acceptance criteria
Probability of prevention of explosive propagation and personnel injury by protective walls ( Book )
1 edition published in 1964 in English and held by 1 library worldwide
Given the occurrence of an initial large detonation in a storage or manufacturing facility for explosives, the probability of the spread of detonation can be estimated as a function of explosive quantity, barrier strengths and separation distances. Conversely these parameters can be established at values consistent with predetermined probabilities for safety. The mechanisms of detonation propagation are classified and means described for assessing the hazard associated with each. The analysis of detonation over-all probability provides a means of either automatic computer treatment or manual calculation of safety and it results in an index of safety for the judging of protective buildings, walls and magazines
Propogation Test of Proposed Explosive Train for Fuze, MT, XM563 ( Book )
1 edition published in 1964 in English and held by 1 library worldwide
An explosive train utilizing the M46 Stab Detonator instead of the T37 Stab Detonator was proposed for use with the Fuze, MT, XM563. The fuze will be used with field artillery Beehive type ammunition. Propagation tests were conducted to evaluate the output and establish the reliability of the proposed explosive train. (Author)
A METHOD FOR BALLISTICALLY TESTING XM94 PRIMERS ( file )
1 edition published in 1964 in English and held by 1 library worldwide
Studies are reported with a special .45-caliber gun which demonstrated a simple and economical technique for measuring functional adequacy of these primers in a system similar to that employed in the end item. The test appears very sensitive to primer quality. The weapon chamber can be modified to fire several different primer/propellant container combinations. Propellant containers were used with XM94 and XM94E1 primers for this report. The output of the primer-propellant container is determined by measuring muzzle velocity of the .45-caliber bullet
IN-PROCESS REVIEW OF THE ADVANCE PRODUCTION ENGINEERING PROGRAM FOR THE 105MM XM494 APERS CARTRIDGE ( file )
1 edition published in 1966 in English and held by 1 library worldwide
Advance production engineering of the 105mm XM494 Cartridge used in the M60 Tank has resulted in a technological breakthrough which will substantially improve the manufacturability of the item. The program is scheduled for completion in FY67. (Author)
 
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