Abstract: Systems and apparatus are provided for a high-power microwave sensor using an unmanned aerial vehicle. The unmanned aerial vehicle may include a central body, at least one electric motor, and a barometric pressure feedthrough. The central body may include a first enclosure housing a plurality of low voltage components, a voltage feedthrough connector, and a second enclosure housing a plurality of high voltage components. The low voltage components may include a first signal processing system, a first radio transceiver, a flight controller, a second signal processing system, a second radio transceiver, and a navigation system. The high voltage components may include a plurality of electronic speed controllers, a power distribution module, an input power interface, and a plurality of high power filters. The components of each enclosure may be segregated such that the high voltage components do not create electromagnetic interference with the low voltage components.

Abstract: A wooden cable reel has a drum made of a plurality of staves and flanges secured at the ends of the drum. A steel support ring is rolled from a strip to have a diameter corresponding to the interior diameter of the drum and the ends of the strip are welded together. The support ring extends around the interior of the drum intermediate its ends and is secured to the drum from the inside by fasteners extending through the ring and into the interior surface of the drum. The support ring resists inwardly directed forces applied to the drum when cable is wound onto the reel and thus prevents the drum from deforming or collapsing.

Abstract: A wooden cable reel has a drum made of a plurality of staves and flanges secured at the ends of the drum. A steel support ring is rolled from a strip to have a diameter corresponding to the interior diameter of the drum and the ends of the strip are welded together. The support ring extends around the interior of the drum intermediate its ends and is secured to the drum from the inside by fasteners extending through the ring and into the interior surface of the drum. The support ring resists inwardly directed forces applied to the drum when cable is wound onto the reel and thus prevents the drum from deforming or collapsing.