Prediction of Projectile Ricochet Behavior After Water Impact*

Baillargeon, Yves; Bergeron, Guy

doi:10.1111/j.1556-4029.2012.02170.x

Cited by 4 publications

(11 citation statements)

References 3 publications

(6 reference statements)

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“…Угол рикошета -угол между траекторией полета снаряда после столкновения его с преградой и плоскостью преграды после рикошета [12]. Курсовой угол -угол бокового отклонения снаряда после рикошетирования от прямолинейного первоначального его полета [24]. Используют также термин критический угол рикошета (КУР).…”

Section: результаты и обсуждениеunclassified

“…Рикошет от водной преграды возможен для пуль при их попадании под углом 15-30° [24], 3-8° [26], от мягких пород дерева: абачи, сосна -при значениях угла встречи соответственно до 12,5 и 27,5°, от твердых пород дерева: бук, бразильский орех -до 37,5 и 50° соответственно.…”

Section: результаты и обсуждениеunclassified

“…При рикошетировании от глади воды угол рикошета больше угла встречи. Значение угла рикошета при указанном типе преграды зависит от размеров снаряда: угол рикошета для пуль среднего калибра больше, чем для пуль малого калибра [24,26]. Угол рикошета для преграды, выполненной из дерева, обычно больше угла встречи [12].…”

Section: схематическое изображение траектории движения пули и плоскосunclassified

“…После рикошета пули могут изменить ориентацию своей оси и начать «кувыркаться» [11]. Для водной преграды небольшой угол встречи (2,5°) не влияет на стабильность пули, а при значении его более 10° устойчивость пули в полете начинает изменяться: траектория полета пули малого калибра отклоняется преимущественно вправо (до 66°), среднего калибра и вправо (до 25,5°), и влево (до 54°) [24]. Для древесной преграды (независимо от плотности дерева) курсовой угол также значительно изменяется при больших значениях угла встречи, что связано с увеличением продолжительности контакта пули с преградой.…”

Section: схематическое изображение траектории движения пули и плоскосunclassified

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The possibilities for the expert diagnostics of the influence of the glance of a bullet on the character of the injuries inflicted by shooting a hunting weapon

Makarov¹,

Галкина

Кинле

et al. 2017

Sud.-med. ekspert.

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The objective of the present work was to study and analyze the available data concerning the influence of the glance of a bullet on the character of the injuries inflicted by shooting certain types of hunting weapons. This review gives evidence of the possibility of the objective diagnostics of the injuries inflicted by gunshots using the rifle-bore weapons. However, we have failed to find information about the diagnostic criteria for the evaluation of the wounds inflicted by the bullets shot from smooth-bore hunting rifles after their glance from various surfaces in the available special literature publications. Such situation creates the prerequisites for the erroneous conclusions from the results of forensic medical expertise of the after-penetration blunt wounds.

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Section: результаты и обсуждениеunclassified

Section: схематическое изображение траектории движения пули и плоскосunclassified

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The possibilities for the expert diagnostics of the influence of the glance of a bullet on the character of the injuries inflicted by shooting a hunting weapon

Makarov¹,

Галкина

Кинле

et al. 2017

Sud.-med. ekspert.

View full text Add to dashboard Cite

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“…They ricochet in a relatively predictable direction (azimuth variation of about 10 ). 4 • Projectiles that ricochet with a less predictable direction of travel tend to travel more slowly. 4 • When waves are traveling in the same direction as projectile travel, the steep wave faces decrease the probability of ricochet, with those that do ricochet tending to do so at lower speed and in less predictable directions.…”

Section: Introductionmentioning

confidence: 99%

Estimating Ricochet Hazard Zones at Sea

Mirshak

Beech

2018

Journal of Defense Modeling & Simulation

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Naval operators commonly report that when projectiles impact the ocean surface, they ricochet mainly to the right but that some rounds ricochet in wildly unpredictable directions. This observation, which leads to considerable uncertainty with regard to the resulting hazard zone for projectiles fired at sea, seems contradictory to observations from controlled experiments where projectiles with similar incident angles tend to ricochet in a more predictable manner. In this paper, we postulate that the likely cause of the discrepancy is ocean waves. Past work examining the effect of waves on ricochet is extended to model the risk area related to projectile ricochet at sea. Ricochet results from controlled experiments are incorporated into a simple model that combines a two-degree-of-freedom ballistic model and a series of analytically derived wave fields with different amplitudes and directions of travel. For the purposes of demonstration in this paper, data for different .50 calibre projectiles are used to populate the model. The results support the notion that waves have a considerable effect on ricochet hazard zones.

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An experimental study of the water entry trajectories of truncated cone projectiles: The influence of nose parameters

Sui

Ming

et al. 2022

Physics of Fluids

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We report on an experimental study of the trajectories of truncated cone projectiles on water entry. The water entry trajectory stability is of great significance to the motion control of projectile. In this paper, the truncated cone nose shape can be described by the area of the leading plane and the cone angle α. Two high-speed cameras are used to capture the trajectories of the projectiles and the initial stage of cavity dynamics. We reveal that the trajectory stability of a projectile is highly dependent on the wetted surface of the nose, which is determined by the location of the separation line between the surfaces of the cavity and body. The increase in the leading plane area is beneficial to the formation of a stable trajectory, in which only the leading plane is wetted. In an unstable trajectory case, the large hydrodynamic moment from the wetted surface on the side of the nose causes a significant rotation of the projectile. However, for the projectile with the cone angle [Formula: see text], though the side of the nose is fully wetted, the trajectory of the projectile turns into stable again. Results show that the attitude deflection of the projectile is determined by the cone angle of the nose. It is also found that the attitude deflection results in an irregular cavity, which further aggravates the rotation of the projectile. We quantify the relationship between the trajectory stability and two nose parameters systematically, and a phase diagram is obtained for a large parameter space. The findings in this work can be used as a reference for future designs to ensure stable trajectories on water entry.

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Prediction of Projectile Ricochet Behavior After Water Impact*

Cited by 4 publications

References 3 publications

The possibilities for the expert diagnostics of the influence of the glance of a bullet on the character of the injuries inflicted by shooting a hunting weapon

The possibilities for the expert diagnostics of the influence of the glance of a bullet on the character of the injuries inflicted by shooting a hunting weapon

Estimating Ricochet Hazard Zones at Sea

An experimental study of the water entry trajectories of truncated cone projectiles: The influence of nose parameters

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