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An annular cutter (also called a core drill, core cutter, broach cutter, trepanning drill, hole saw, or cup-type cutter) is a form of core drill used to create holes in metal. An annular cutter, named after the annulus shape , cuts only a groove at the periphery of the hole and leaves a solid core or slug at the center.
Early Berkuts used wings and canard that were structurally similar to the Long-EZ and used solid blue 2 lb/cu. ft. density Dow STYROFOAM PI cores cut to shape with a hot-wire foam cutter, but with carbon fiber reinforced polymer skins instead of fiberglass. The fuselage and winglets remained fiberglass.
Water jets are capable of cutting up to 6 in (150 mm) of metals and 18 in (460 mm) of most materials, [48] though in specialized coal mining applications, [49] water jets are capable of cutting up to 100 ft (30 m) using a 1 in (25 mm) nozzle. [50]
Generally, the jet penetrates around 1 to 1.2 times [56] the charge width. For the cutting of complex geometries, there are also flexible versions of the linear shaped charge, these with a lead or high-density foam sheathing and a ductile/flexible lining material, which also is often lead.
Image credits: Genie_noteC #5. I cut open all my product containers and use every last drop. It's more about not wasting stuff, but it's also frugal. You would be surprised how much product can be ...
Also commonly used in aircraft fires to rapidly deliver water or foam to the interior of an aircraft. Pickheaded axe Standard fire axe having a 6 or 8 lb (2.7 or 3.6 kg) steel head with a cutting blade on one edge and a square, pointed pick on the opposite side. Come in various handle lengths.