Abstract: A precision ammunition cartridge reaming device employs a body die having an interior cavity into which an ammunition cartridge is insertable through a first end. A reaming tool rotationally powered is insertable into the interior cavity through a second end. Rotation of the reaming tool trims the interior of a neck area of the ammunition to form a concentric surface with the exterior thereof. The distal edge of the cartridge may also be trimmed by the reaming tool to form each sequentially inserted cartridge to an equal length.

Abstract: A precision ammunition cartridge reaming device employs a body die having an interior cavity into which an ammunition cartridge is insertable through a first end. A reaming tool rotationally powered is insertable into the interior cavity through a second end. Rotation of the reaming tool trims the interior of a neck area of the ammunition to form a concentric surface with the exterior thereof. The distal edge of the cartridge may also be trimmed by the reaming tool to form each sequentially inserted cartridge to an equal length.

Abstract: A precision ammunition cartridge reaming device employs a body die having an interior cavity into which an ammunition cartridge is insertable through a first end. A reaming tool rotationally powered is insertable into the interior cavity through a second end. Rotation of the reaming tool trims the interior of a neck area of the ammunition to form a concentric surface with the exterior thereof. The distal edge of the cartridge may also be trimmed by the reaming tool to form each sequentially inserted cartridge to an equal length.

Abstract: A tire and rim combination includes a pair of circular rims with each of the rims including a radially extending flange member. The flange member can be releasably fit into the perimeter groove of the tire.

Abstract: An arcjet thruster has a body defining a constrictor and nozzle constituting an anode and forming an arc chamber. An elongated rod constitutes a cathode spaced from the constrictor by a gap generally coextensive with the arc chamber. An electrical potential is applied to the anode and cathode to generate an electrical arc in the arc chamber from the cathode to the anode. Propellant is supplied to the arc chamber with generation of the arc so as to produce thermal heating and expansion of the propellant through the nozzle. The thruster employs several features which improve its performance. One feature relates to the use of propellant blends with high specific impulse additives. Another feature relates to injection of the high specific impulse additive into the bulk propellant feed at the region of the cathode tip.

Abstract: An arcjet thruster has a body defining a constrictor and nozzle constituting an anode and forming an arc chamber. An elongated rod constitutes a cathode spaced from the constrictor by a gap generally coextensive with the arc chamber. An electrical potential is applied to the anode and cathode to generate an electrical arc in the arc chamber from the cathode to the anode. Propellant is supplied to the arc chamber with generation of the arc so as to produce thermal heating and expansion of the propellant through the nozzle. The thruster employs several features which improve its performance. One feature relates to the use of propellant blends with high specific impulse additives. Another feature relates to injection of the high specific impulse additive into the bulk propellant feed at the region of the cathode tip.

Abstract: An arcjet thruster has an anode body forming a constrictor and a nozzle which define an arc chamber. The thruster also has a cathode in the form of a rod having a tip and being spaced upstream from the constrictor. The thruster employs several features which reduce anode and cathode erosion and increase the operational life of the thruster. One set of features relate to the employment of cathode and anode shaping. Another feature relates to the use of a propellant injector having a series of radially and tangentially arranged passages for providing direct injection of propellant gas into the arc chamber and enhanced convective cooling of the anode.

Abstract: A hybrid electrothermal/electromagentic arcjet thruster has a cylindrical body with a longitudinal central axis, a plurality of electro-thermal propulsion mechanisms defined in the body in radially and circumferentially spaced relation about and extending along the central axis, and an electromagnetic propulsion mechanism defined in the body coaxially along the central axis thereof, between the electrothermal propulsion mechanisms and extending downstream thereof. Each electrothermal propulsion mechanism has tandemly-arranged constriction and expansion zones and are operable to concurrently receive a flow of gaseous propellant through the constriction zone and generate an electric arc therethrough to the expansion zone. The arcs interact with the propellant flows such that the latter are partially ionized and electrothermally accelerated through the expansion zones. The electromagnetic propulsion mechanism has an expansion chamber which communicates with, and extends downstream of, the expansion zones.