Abstract: A blunt impact test apparatus includes an apparatus frame having track rails for positioning proximate the test structure; a track angle positioning mechanism engaging the track rails to control a slope of the track rails; and an impact cart adapted to roll on the track rails.

Abstract: There is provided an electrodynamic modal test impactor system and method. The system has a controller device and an impactor assembly coupled to the controller device. The impactor assembly has a housing and a permanent magnet positioned within the housing. The impactor assembly further has a voice coil positioned within the housing in a magnetic gap of a magnetic yoke housing. The voice coil is driven by the controller device. The impactor assembly further has a drive shaft supported by two or more support elements. The drive shaft is attached to the voice coil and is driven by the voice coil. The impactor assembly further has a load cell attached to a free end of the drive shaft and a biasing device positioned within the magnetic yoke housing.

Abstract: A blunt impact test apparatus includes an apparatus frame having track rails for positioning proximate the test structure; a track angle positioning mechanism engaging the track rails to control a slope of the track rails; and an impact cart adapted to roll on the track rails.

Abstract: In one embodiment a damage impactor comprises a housing defining a passage, an impact assembly, an actuator assembly, and an engagement assembly. In one embodiment the impact assembly comprises a guide rod comprising an impact head, and a bias mechanism to bias the guide rod in a first direction. The actuator assembly comprises an actuator, and an actuator rod coupled to the actuator. The engagement assembly selectively couples the impact assembly to the actuator assembly by driving the actuator rod in the first direction to an engagement position where the engagement assembly couples the actuator rod to the guide rod, retracting the actuator rod in a second direction, opposite the first direction, to a release position and releasing the guide rod from the actuator rod. Other embodiments are also disclosed.

Abstract: In one embodiment a damage impactor comprises a housing defining a passage, an impact assembly, an actuator assembly, and an engagement assembly. In one embodiment the impact assembly comprises a guide rod comprising an impact head, and a bias mechanism to bias the guide rod in a first direction. The actuator assembly comprises an actuator, and an actuator rod coupled to the actuator. The engagement assembly selectively couples the impact assembly to the actuator assembly by driving the actuator rod in the first direction to an engagement position where the engagement assembly couples the actuator rod to the guide rod, retracting the actuator rod in a second direction, opposite the first direction, to a release position and releasing the guide rod from the actuator rod. Other embodiments are also disclosed.

Abstract: This invention relates to a hanging type or ground supported bird observation enclosure, selectively limiting, squirrel resistant, provisioned with means for installation of at least one feed or drink receptacle within interior confines. Comprising the enclosure is an open mesh body structure, ported by an plurality of circular openings, sealed by a closure on one end, the other having at least one cover, for feed or drink replenishment.