Abstract: A rocket motor has an energetic material between solid propellent and a casing that surrounds the solid propellent. The energetic material is configured to be burned along with the solid fuel during normal operation of the rocket motor to produce thrust. The energetic material can also be detonated to cause rupture of the casing and to break up the solid propellent without detonating the solid propellent. The energetic material may be formed as part of one or more Embedded Charge Assemblies (ECAs) to distribute energy in the form of one or more pressure waves to rupture the casing or break up the solid propellent. The ECAs may be configured as a Linear Shaped Charge (LSC), Chevron, spherical charge or explosive. The detonation may be initiated as part of a flight termination process. The detonation may also be initiated as a part of process to prevent as a higher-order reaction, such as in reaction to heating from a fire or other cause.

Abstract: In a rocket motor in which burn rate enhancement (BRE) wires are used to accelerate the burn rate of the solid propellent, embedded charge assemblies (ECAs) are configured as support structures for the BRE wires. Each ECA includes an energetic material that is configured to burn along with the solid propellent to produce thrust and, upon detonation, to break up the solid propellent to terminate thrust. The detonation may also be initiated as a part of process to prevent a higher-order reaction, such as in reaction to heating from a fire or other cause. By being located inside the casing, the energetic material and ECAs do not adversely affect aerodynamics of the flight vehicle of which the rocket motor is a part, such as a missile.

Abstract: A portable ice shelter comprises a base, a rigid frame member, a multi-panel skin and a first set of flexible poles. The base comprises a bottom wall and a sidewall that forms an outer perimeter. The rigid frame member is pivotably mounted to the base at first and second locations, and is moveable between a stored position against the base and a deployed position. angled from the base. The multi-panel skin is coupled to the rigid frame member, the multi-panel skin defining an enclosure when expanded. The first set of flexible poles extend from the rigid frame member, and each of the flexible poles in the first set is connected in an expandable fashion so as to expand at least a portion of the multi-panel skin when the rigid frame member is in the deployed position.

Abstract: A portable ice shelter comprises a base, a rigid frame member, a multi-panel skin and a first set of flexible poles. The base comprises a bottom wall and a sidewall that forms an outer perimeter. The rigid frame member is pivotably mounted to the base at first and second locations, and is moveable between a stored position against the base and a deployed position. angled from the base. The multi-panel skin is coupled to the rigid frame member, the multi-panel skin defining an enclosure when expanded. The first set of flexible poles extend from the rigid frame member, and each of the flexible poles in the first set is connected in an expandable fashion so as to expand at least a portion of the multi-panel skin when the rigid frame member is in the deployed position.

Abstract: A biomass stove includes a housing enclosing a firebox that defines a ceiling portion opposite a bottom, a firepot disposed within the firebox, an air intake assembly coupled to the firebox, and at least one duct disposed entirely inside the firebox and extending between the ceiling portion of the firebox and the air intake assembly. The duct(s) provide a heat exchanging flow path for ambient air entering the air intake assembly, where the ambient air is heated within the duct(s) prior to exiting through the ceiling portion of the biomass stove.

Abstract: A biomass stove includes a housing enclosing a firebox that defines a ceiling portion opposite a bottom, a firepot disposed within the firebox, an air intake assembly coupled to the firebox, and at least one duct disposed entirely inside the firebox and extending between the ceiling portion of the firebox and the air intake assembly. The duct(s) provide a heat exchanging flow path for ambient air entering the air intake assembly, where the ambient air is heated within the duct(s) prior to exiting through the ceiling portion of the biomass stove.