Low-overload internal ballistics in UAV ejection using multiple time-sequenced compressed-air chambers [PDF]
Scientific ReportsCompressed-air ejection systems are characterized by short actuation times and high instantaneous flow rates, which subject unmanned aerial vehicles (UAVs) to significant overloads during launch.
Tian Li +5 more
doaj +2 more sources
Modeling of Ammunition Dynamic Pressure Measurement Chain in Ballistic Tests [PDF]
Sensors, 2023 The use of piezoelectric transducers for internal dynamic pressure measurements in ammunition testing provides a significant advantage in the development and performance analysis of weapons and ammunition.
Caio Bittencourt Cardoso Felix +2 more
doaj +2 more sources
Numerical Evaluation of a Test Bed of an Orbital Transmission Engine in an Initial Vacuum Condition [PDF]
علوم، فناوری و کاربردهای فضایی, 2023 The purpose of this research is to evaluate a ground test bed of an orbital transmission engine with pre-evacuation of the engine's internal space. In the usual tests on the ground, the initial pressure of the engine is atmospheric pressure. While during
Nematollah Fouladi, Alireza Mohammadi
doaj +1 more source
Experimental Assessment of Primer Pressure in 9 mm Pistol Ammunition [PDF]
Problemy Mechatroniki, 2020 In theoretical simulations of internal ballistics phenomena, the value of pressure generated by the ignition system is required. Typically, the ignition pressure value is assumed to be 3 - 5 MPa.
Bartosz FIKUS +2 more
doaj +1 more source
Energies, 2022 The estimation of erosive burning is of great importance for the internal ballistics computation of a solid rocket motor (SRM) with a large aspect ratio.
Lin Sun +4 more
doaj +1 more source
External Ballistics Simplified Model of the “RT – 400” Rocket Aerial Target [PDF]
Problemy Mechatroniki, 2018 “RT-400” rocket aerial target system is described in the paper; research method of its simplified external ballistics characteristics is presented and the obtained results are discussed.
Algimantas FEDARAVIČIUS +3 more
doaj +1 more source
Comparative Analysis of Different Methods of Calculating Pressure Inside the Barrel in Post-Muzzle Period of a Shot [PDF]
Problemy Mechatroniki, 2022 The article presents the results of calculations of the pressure of propellant gases inside the barrel in a post-muzzle period of a shot. Three methods of calculating the pressure in the barrel bore in the post-muzzle period of the shot were used in the ...
Damian SZUPIEŃKO, Radosław TRĘBIŃSKI
doaj +1 more source
Preliminary Physical and Mathematical Model of the Recoil Operated Firearm within the Bolt Recoil Period [PDF]
Problemy Mechatroniki, 2021 This paper presents a preliminary physical and mathematical model which describes the specific action of an automatic, short recoil operated firearm with an accelerator.
Damian SZUPIEŃKO, Ryszard B. WOŹNIAK
doaj +1 more source
Three-Dimensional Numerical Modeling of Internal Ballistics for Solid Propellant Combinations
Mathematics, 2021 The processes that take place within the Internal Ballistics cycle of an artillery round are highly influenced by geometric effects. They are also highly affected by the presence of a combination of energetic materials, such as the propellant, igniter ...
Ramón A. Otón-Martínez +4 more
doaj +1 more source
Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character, 1918 My object is to explain and illustrate a method which I have devised for obtaining the pressure-volume relation of the gases in the bore of a gun, from the instant of ignition of the charge to the instant when the shot leaves the gun. By the aid of the expressions given below, the pressure-volume curve, or the indicator diagram, of the charge can be ...
openaire +2 more sources