Download or read book Specifications for Rotating Bands for Projectiles written by United States. Army. Ordnance Department and published by . This book was released on 1918 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Specifications for Rotating Bands for 3 inch Projectiles written by United States. Army. Ordnance Department and published by . This book was released on 1917 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wear of Projectile Rotating Bands written by R. S. Montgomery and published by . This book was released on 1985 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rotating or driving bands are bands relatively soft materials surrounding a projectile. They have a number of functions the chief of which is probably that they produce stabilizing rotating of the projectile when they are engraved or keyed into the rifling. These bands are used on spin-stabilized projectiles as small as 20 mm caliber, but this discussion concerns especially the larger cannon, i.e., in excess of 105 mm. Excess wear of projectile rotating bands has a number of important negative consequences including inaccuracy and short rounds. There are two distinctly different mechanisms of wear. At low speeds near the beginning of motion, wear is by adhesion, abrasion, and even under some conditions, scuffing. After a few centimeters of sliding, a thin surface film of molten band material is formed and the remainder of the sliding is melt-lubricated. While metal-on-metal sliding is limited to the first few centimeters, it is very important and can result in serious wear problems down bore. The exact wear of rotating bands depends on the motion of the projectile in the bore of the cannon. Therefore, this motion can be inferred from the wear.
Download or read book Fused on Rotating Bands for Projectiles written by and published by . This book was released on 1974 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this work was to determine the feasibility of a new idea for applying rotating bands to projectiles. The idea is the in-situ fusion of the rotating band material in a graphite crucible fitted around the projectile. Various heating and shielding methods were explored. It was found that several materials could be successfully deposited using induction or furnace heating in an Argon atmosphere. Metallographic studies and post- application, heat treating studies were carried out. Several bands 'fused on' 30 mm projectiles were successfully fired through a 30 mm cannon.
Download or read book Development of a Plastic Rotating Band for High Performance Projectiles written by W. S. Larson and published by . This book was released on 1974 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: This includes the investigation of plastic rotating bands fabricated directly to steel projectiles by laminating, casting, fluid bed coating, injection and compression molding. The successful method was to injection mold nylon 12 over a clean and primed projectile seat and then to heat the primed interface to a melt temperature by induction heating the projectile.
Download or read book Friction of Rotating Band Material During Engraving and Initial Projectile Travel written by R. S. Montgomery and published by . This book was released on 1978 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: The sliding characteristics and coefficients of friction of rotating band and potential rotating band material on steel were studied in the laboratory at velocities corresponding with projectile velocities near the origin-of-rifling. The band materials investigated were gilding metal, 7075 aluminum alloy, AZ61A magnesium alloy, sintered iron, soft iron, nylon 6-6, and vulcanized fiber. It is possible to draw a number of conclusions and make a number of conjectures about the engraving and initial travel of cannon projectiles from the results of this study. A comparison of the different sliding characteristics and laboratory friction coefficients provides insight into the behavior of projectiles and will help to allow the design of rotating bands without the expensive extensive firing of an actual cannon. (Author).
Download or read book Index of Specifications and Standards written by and published by . This book was released on 2005 with total page 810 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preliminary Evaluation 20MM Plastic Rotating Bands written by and published by . This book was released on 1975 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental exploratory evaluations of plastic bands applied to ammunition for the M139 gun consisted of obtaining and evaluating data provided by comparison firings between projectiles having either plastic or copper bands in two ballistic environments, the M139 and M61 gun barrels (Mann) over the temperature range -65 deg F, +70 deg F, and +160 deg F. In all, 120 projectiles were fired, 60 in each environment and 10 of each band material at each conditioning temperature. In addition, photographic observation of representative in-flight projectile firings provided visible evidence of band integrity, projectile stability, and band deformation.
Download or read book Acceptable Limits of Rotating Band Damage for 5 Inch Projectiles written by A. S. Jennings and published by . This book was released on 1974 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: Twenty 5-in./54 MARK 64 Mod 0 projectiles with various degrees of rotating band damage were ballistic tested. A control group with no rotating band damage was tested along with several other groups with nicks, scratches, and gouges in the rotating bands. None of the groups gave ballistic results (velocity or range) significantly different from the control group or each other. Photographs show acceptable levels of rotating band damage with respect to ballistic performance.
Download or read book Rotating Band Study Test of 3 in 70 AA Projectiles with Armco Iron Rotating Bands written by and published by . This book was released on 1951 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: 3-in./70 projectiles of various types, fitted with gilding metal rotating bands, have been observed to exhibit serious band wear; that is, partial or complete obliteration of the engraving of the bands recovered after firing. It was desired to investigate the effect of replacing the gilding metal with soft iron, in order to determine the results of using a material with a considerably increased melting point, and if this change would produce a band which did not fail, to determine the effect upon gun performance.
Download or read book Sliding Forces and Normal Loads on Projectile Rotating Bands written by A. Kent Stiffler and published by . This book was released on 1983 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: A theory is presented to determine the projectile sliding forces in interior ballistics. Emphasis is placed on the barrel entrance region where the projectile rotating bands are impelled on to the rifling. It is proposed that the contact stress is constant and is given by a modified von Mises failure criterion. Normal loads and friction forces are dependent on the growth of the contact area which is derived from the geometrical details of the projectile and barrel. Radial displacements at the contact are included. The theory is in agreement with quasi-static and dynamic laboratory tests. (Author).
Download or read book A Method for Predicting Rotating Band Wear for Large Bore Projectiles written by Herbert Lancaster Holt and published by . This book was released on 1974 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development and Test of Nylon Rotating Band for 20mm High Velocity Projectile written by R. B. BUTLER and published by . This book was released on 1955 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fused On Rotating Bands for Small Caliber Ammunition written by and published by . This book was released on 1976 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new in-situ method for applying 'fused on' rotating bands to projectiles has been demonstrated. U.S. Patent No. 3,888,295 of 10 June 1975, has been granted on the method. The new method produces bands which are completely bonded to the projectile wall.
Download or read book Index of Specifications and Standards used By Department of the Army written by United States. Department of the Army and published by . This book was released on 1960-04 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rotating Band Torques and Stresses on AMCAWS 30mm Copper Banded Projectiles written by and published by . This book was released on 1975 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report details the study effort and testing conducted to design a more optimum rifling profile for the Advanced Medium Caliber Aircraft Weapon System (AMCAWS 30MM) ammunition. Several critical parameters such as bearing stress and torque have been identified and their importance to the ultimate survivability of the band assessed. These critical parameters have been incorporated into a preliminary model to predict the success or failure of a given band and barrel combination.
Download or read book Improved 20mm Plastic Rotating Bands written by and published by . This book was released on 1976 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project included the study of processing parameters, material variations, and geometry factors for producing highly reliable nylon 12 plastic rotating bands bonded to M56A4 20mm projectiles. Included were the development of material and process specifications. Production tooling and equipment were developed, and a large volume of plastic banded projectiles was fabricated under simulated high volume conditions. The efficacy of each developed parameter was verified by gun fire testing.
