A projectile has a main body having a smooth end region, an intermediate sleeve over the smooth end region, a guide mechanism sleeve and guide fins. In one embodiment, the intermediate sleeve has an internal surface and an external thread, the intermediate sleeve being soldered at the internal surface to the smooth end region of the main body. The guide mechanism sleeve has an internal thread screwed with the internal thread onto the external thread of the intermediate sleeve at a tail region of...

A disposable firearm cleaning device and method are disclosed for cleaning the chamber and bore of a firearm, especially in the field. The cleaning device comprises a compressed gas cartridge which is supported in the chamber of the firearm in spaced relation to the walls thereof. A spring-loaded valve actuable by the firing pin of the firearm is adapted to release the compressed gas which flows between the cartridge and chamber walls and out the bore of the firearm to clean the chamber and bore...

A breech load pistol and conversion kit which may be adapted to the frame of a semi-automatic pistol, such as a Government 0.45 pistol. The present invention may provide a modified reinforced slide which is slidably mounted to the pistol frame and is adapted to include a pivotable barrel assembly mounted thereto. The barrel preferably is suitable for target pistol accuracy. The barrel assembly may be pivoted exposing the breech end for single shot loading for target shooting applications. The co...

A weapon safety locking apparatus that has a flexible, longitudinally adjustable, locking rod, a chamber insert connected to one end of the rod and a breech block connected to the chamber insert. The apparatus has a locking means to lock the rod within the barrel of a weapon and a plurality of locking knuckles on the rod that the locking means grips when the locking means is in locking engagement with the rod. There is a muzzle cap and a chamber insert that have a tapered end to enable the appar...

In the preferred embodiment of the invention, a cooled bipropellant thruster 70 for controlling the on-orbit position and orientation of a spacecraft is provided. The cooled bipropellant thruster 70 uses a liquid fuel and liquid oxidizer. The liquid fuel is decomposed in a first chamber 72 with a catalytic bed of decomposition material 74 and produces at least one reaction gas, which flows to the second reaction chamber 90. The second reaction chamber 90 is heated by the reaction gas, but is coo...

A turbulent flow injector includes a ceramic injector body having an outer ylindrical wall with an inner surface, an inner cylindrical wall having an inner surface, an end wall at an outlet end of the body terminating the outer and inner walls so as to define an annular cavity between the inner and outer walls. The annular cavity is open at an inlet end of the body. A duct, defined by the inner surface of the inner wall, has an inlet at the inlet end of the body. A heat conductive insert is posi...

A scramjet engine for powering an aircraft at supersonic velocities is disclosed. The scramjet engine includes supersonic compressed airflow in a combustor along with a fuel for providing combustion. A monopropellant is also supplied adjacent to the airflow and fuel. The monopropellant is effective for expanding in the combustor for mixing the airflow and the fuel for the combustion of the airflow and fuel for generating combustion gases. In a preferred embodiment of the invention, the monoprope...

Undesirable high temperature gradients associated with inadequate mixing of dilution air with gases of combustion in turbines is avoided in a structure wherein dilution air is injected with a high degree of circumferential swirl through an opening (50) to the interior of an annular combustor (20) at the outlet (36) thereof which is connected to a turbine nozzle (46). The high circumferential swirl generates high "g" forces causing rapid penetration of the dilution air in the radial direction thr...

A stator vane for a gas turbine engine wherein the airfoil section includes a plurality of pockets with an impingement hole at the upstream end of a passageway formed in the pocket and a slot formed on the opposite end of the pocket for discharging a film of cooling air along the outer surface of the air foil. The impingement hole and slot being arranged so that the flow of air in the passageway is in counterflow indirect heat exchange relationship with the gas path, thus placing the hottest par...

A modular system for hunting rifles comprises barrels (13) of different caliber which can be attached via a barrel-mounted positioning rail (19) to a respective mounting tongue (11) of a stock which represents the basic unit. The stock can be constructed as long or short repeating rifle or as single-shot rifle so that any combinations of calibers and weapon types can be assembled. At its end, the barrel has a locking bush with locking lugs which cooperate with complementary locking lugs of an ex...