Bullet velocity

An electronic apparatus " Counter Chronograph" of Potter Instrument Co for measuring bullet velocities) E) K.J. Brimley, TransSocInstrTechnology(London) 2, p 2 (1950) (Electronic Condenser Chronoscope)... 

Direct experimental proof of the possibility of rapid gas ignition under compression by a shock wave was given by Leipunskii and the author. Compression by the shock wave was accomplished by shooting a fast bullet from a special small-caliber rifle into the explosive mixture. In front of the body, which was flying with supersonic velocity, a steady shock wave formed whose velocity with respect to the gas was equal to the velocity of the body. This condition determined the pressure and temperature amplitudes in the wave. The duration of the compressed state of the gas did not exceed 10"5 sec. For a bullet velocity of 1700-2000 m/sec, ignition of the mixture 2H2 + 02 + 5Ar was observed. 

The burning of the propellant very rapidly produces a large volume of gases in a confined space accompanied by a substantial temperature and pressure rise. The resultant gas pressure forces the bullet away from the cartridge case and down the barrel of the firearm. The temperature and pressure rise also serves to cause the cartridge case to expand in the chamber, thereby effectively sealing the chamber to prevent any rearward escape of gas (obturation), which would lead to a reduction in pressure and consequently a reduction in bullet velocity. 

It was also observed that the number of discharge residue particles on the firing hand decreased markedly as the bullet velocity increased. One possible explanation for this is that the greatly increased suction in the wake of the faster bullet causes more particles to be sucked out of the muzzle leaving fewer to exit from other vents and to be deposited on the hand. This... 

Axite Cartridges with 200-grain bullets. Velocity 2,726 F.S. Pressure 20.95 tons. 

Axite Cartridges with 215-grain bullets. Velocity 2,498 F.S. Pressure 19.24 tons. 

Impacts and Explosives. The coUision of high velocity bullets or other projectiles with soHds causes rapid conversion of kinetic to thermal energy. Plasmas result iacidentaHy, whereas the primary effects of impact are shock and mechanical effects in the target. Impact-produced plasmas are hot enough to cause thermonuclear bum (180). 

These propints gave very satisfactory performance. They developed a muzzle velocity of 1640 ft/sec and a press of 1750 atm, when used in 84cm field guns with a 600g charge and a 6.7kg projectile. In the 7.5mm rifle, with a 2g charge and a I3.8g bullet, a muzzle velocity of 2035 ft/sec and a press of 2200 atm were attained Refs 1) P.G. Sanford, Nitroexplosives , London (1896), 186-7 2) Daniel (1902), 584... 

Ballistic Strength. 100% T NT (BuM ine s) Explosion Temperature. Does not expld or ignite at 360° or below Heat of Combustion. 8l8.1kcal/mole Hygroscopicity. Practically none Impact Sensitivity. Comparable to TNT Power. By Trauzl test, 103% TNT Rifle Bullet Test. No detonations from impact of. 30 cal bullet at 90 ft Thermal Stability. Unsatisfactory, loses 49% of wt in 48 hrs at 75° (International Test) Velocity of Detonation. No information Salts of (m-Nitrophenyll-dinitromethane. Milone and Massa (Ref 2) prepd several metallic salts and found that their expl power decreased with increasing atomic v/t of the metal Following are some of the expl salts K salt—yel crysts ... 

Molecules in a gas are in constant motion at speeds on the order of the speed of a rifle bullet at equilibrium there is no net flow of gas and the motion is random. This motion produces collisions of the molecules with the walls of the vessel containing the gas, with a change in momentum of the gas molecule resulting from each collision. This change in momentum produces a force per unit area, or pressure on the wall. Consider those molecules with the component of velocity in the x direction between the value of vx and vx + dvx. The x direction is defined as the direction normal to the wall. The fraction of molecules with the x component of velocity in this range, denoted dN(vx)/N, is given by the density function, f(vx), where... 

NOTE - Glasers use a light bullet driven at high velocity. Any significant increase in weightcould cause excessive chamber pressure to develop. Use caution. The only one I can recommend as safe is the modified. 38 Special when fired in the. 357 Magnum, The. 357 will easily handle the pressures developed by the. 38 cartridge. 

NOTE - Conventional bullets can work very well in this item. You can get good velocities by carefully adjusting the propellant/projectile combination. Remember that a normal bullet will be much heavier than the fully modified one. The Soviet derringer previously mentioned i s believed to have been used in the murder of Nicaraguan Contra leader Enrique Bermudez. No one heard the shots fired and they possessed sufficient power to completely penetrate both sides of his skull. If it was used, this demonstrates a very respectable power level. 

NOTE - The amount of recoil generated by this weapon will depend upon the weightof the bullet and it s velocity. Heavy bullets at high velocity will often... 

Teja, you can rest easy. The penny falls about 500 feet before reaching its maximum velocity 57 miles an hour. Abullet travels at ten times this speed. The penny is not likely to kill anyone. Updrafts also tend to slow the penny. Also note that the penny is not shaped like a bullet, and the odds are that the tumbling coin would barely break the skin. 

C) Dunkle s Syllabus (1960-1961), p 13a (Stein found the rifle-bullet sensitivity of expls to increase with increasing thickness of confinement. For equivalent thickness, the expls were more bullet-sensitive in steel than in A1 bombs. As a quantitative test of deton of the expl, measurements by means of piezoelectric shock-velocity gages showed promise. When there was no firm indication... 

Steel Plate Test (prova della Piastro di Acciaio) (51-2) Ignition Temperature (Tem-peratura di Accensione) (52 3) Velocity of Bullets by Le Boulange Chronograph (294-97)... 

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