A combustion tube assembly of a water heater includes a combustion tube having an open end, a closed end, and an outflow opening located between the open end and the closed end. A cavity of the combustion tube provides a chamber for a combustion of a water heater fuel that produces an exhaust gas that flows down toward the closed end. The combustion tube assembly further includes a diverter structure positioned inside the combustion tube to divert the exhaust gas such that the exhaust gas flows toward the closed end on a first side of the diverter structure and flows from the first side of the diverter structure to the second side of the diverter structure through a flow opening proximal to the closed end. The outflow opening provides an outlet for the exhaust gas that flows to the second side of the diverter structure to exit the combustion tube.

A combustion tube assembly of a water heater includes a combustion tube having an open end, a closed end, and an outflow opening between the open end and the closed end. A cavity of the combustion tube provides a chamber for a combustion of a water heater fuel, where the outflow opening provides an outlet for an exhaust gas resulting from the combustion of the water heater fuel to exit the combustion tube. The combustion tube assembly further includes a spring positioned in the cavity of the combustion tube at the closed end of the combustion tube.

A modular smoker includes a base portion having a through bore extending from a first end of the base portion to a second end of the base portion, wherein the through bore is configured to define a shelf between the first end and the second end, a top portion configured to be removably coupled with the base portion, wherein the top portion has a through bore extending from a first end of the top portion to an opposite second end of the top portion in a first direction, and a screen configured to be held on the shelf of the through bore between the first end and the second end of the base portion. The through bore of the base portion is configured to define a chamber for receiving a combustible material on the screen between the first end and the second end of the base portion, the through bore of the base portion is configured to permit a flow of smoke from the combustible material out the through bore of the base portion at the second end of the base portion, and the second end of the body member is configured to rest on a rim of a container to block the flow of air from the container where a surface of the second end of the body member contacts the rim.

A modular smoker includes a base portion having a through bore extending from a first end of the base portion to a second end of the base portion, wherein the through bore is configured to define a shelf between the first end and the second end, a top portion configured to be removably coupled with the base portion, wherein the top portion has a through bore extending from a first end of the top portion to an opposite second end of the top portion in a first direction, and a screen configured to be held on the shelf of the through bore between the first end and the second end of the base portion. The through bore of the base portion is configured to define a chamber for receiving a combustible material on the screen between the first end and the second end of the base portion, the through bore of the base portion is configured to permit a flow of smoke from the combustible material out the through bore of the base portion at the second end of the base portion, and the second end of the body member is configured to rest on a rim of a container to block the flow of air from the container where a surface of the second end of the body member contacts the rim.

Various embodiments of a vortex hybrid motor are described herein. In some embodiments, the vortex hybrid motor may include a combustion zone defined by a fuel core and/or motor housing. The combustion zone may include an upper zone and a central zone that each contribute to thrust created by the vortex hybrid motor. In some embodiments, an injection port configuration is described that includes a proximal injection port that may be controlled for modulating a delivery of an amount of oxidizer for adjusting an oxidizer-to-fuel ratio. In some embodiments, a fuel core configuration is described that provides radially varying gradients of fuel in order to achieve desired thrust profiles. In some embodiments, the fuel core may include a support structure and/or a proximal end of a nozzle of the vortex hybrid motor may extend into the fuel core.

A cooking apparatus suitable for outdoor use including a substantially ellipsoid or ovoid housing which at least partially defines a cooking area within the same. The housing is substantially formed from aluminium.

A cooking apparatus suitable for outdoor use including a substantially ellipsoid or ovoid housing which at least partially defines a cooking area within the same. The housing is substantially formed from aluminium.

A modular smoker includes a base portion having a through bore extending from a first end of the base portion to a second end of the base portion, wherein the through bore is configured to define a shelf between the first end and the second end, a top portion configured to be removably coupled with the base portion, wherein the top portion has a through bore extending from a first end of the top portion to an opposite second end of the top portion in a first direction, and a screen configured to be held on the shelf of the through bore between the first end and the second end of the base portion. The through bore of the base portion is configured to define a chamber for receiving a combustible material on the screen between the first end and the second end of the base portion, the through bore of the base portion is configured to permit a flow of smoke from the combustible material out the through bore of the base portion at the second end of the base portion, and the second end of the body member is configured to rest on a rim of a container to block the flow of air from the container where a surface of the second end of the body member contacts the rim.

A modular smoker includes a base portion having a through bore extending from a first end of the base portion to a second end of the base portion, wherein the through bore is configured to define a shelf between the first end and the second end, a top portion configured to be removably coupled with the base portion, wherein the top portion has a through bore extending from a first end of the top portion to an opposite second end of the top portion in a first direction, and a screen configured to be held on the shelf of the through bore between the first end and the second end of the base portion. The through bore of the base portion is configured to define a chamber for receiving a combustible material on the screen between the first end and the second end of the base portion, the through bore of the base portion is configured to permit a flow of smoke from the combustible material out the through bore of the base portion at the second end of the base portion, and the second end of the body member is configured to rest on a rim of a container to block the flow of air from the container where a surface of the second end of the body member contacts the rim.

A biomass pellet combustion system includes a primary burn chamber, a coal burn chamber, and a gas burn chamber. The primary burn chamber is configured to receive pellets from a drop tube of the biomass pellet combustion system. The coal burn chamber is configured to receive coals from the primary burn chamber. The gas burn chamber is configured to receive combustible gases from both the primary burn chamber and the coal burn chamber, wherein a secondary combustion process converts secondary combustion air and the combustible gases into exhaust gases in the gas burn chamber.