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A slab of pykrete Pykrete is made of 14% sawdust and 86% water by mass.. Pykrete (/ ˈ p aɪ k r iː t /, PIE-creet) [1] is a frozen ice composite, [2] originally made of approximately 14% sawdust or some other form of wood pulp (such as paper) and 86% ice by weight (6 to 1 by weight).
Different versions include a paddle-shaped design, a vertical beam on a wood support, and two vertical beams on a wood support. Variations also have the string passing through the slot once or two times. Names have included the Boomhower puzzle, T-Bar puzzle, Wit's End puzzle, and the Mini Rope Bridge puzzle.
Conceptual design of Project Habakkuk aircraft carrier with 600-metre (1,969 ft) runway. Project Habakkuk or Habbakuk (spelling varies) was a plan by the British during the Second World War to construct an aircraft carrier out of pykrete, a mixture of wood pulp and ice, for use against German U-boats in the mid-Atlantic, which were beyond the flight range of land-based planes at that time.
The laser cutter is a machine that uses a laser to cut materials such as chip board, matte board, felt, wood, and acrylic up to 3/8 inch (1 cm) thickness. The laser cutter is often bundled with a driver software which interprets vector drawings produced by any number of CAD software platforms.
The parameter may be modified later, and the model will update to reflect the modification. Typically, there is a relationship between parts, assemblies, and drawings. A part consists of multiple features, and an assembly consists of multiple parts. Drawings can be made from either parts or assemblies.
A disentanglement puzzle. The object is to remove the string with the two balls from the wire construction. For puzzles of this kind, the goal is to disentangle a metal or string loop from an object. Topology plays an important role with these puzzles. The image shows a version of the derringer puzzle.
Sketchpad (1963) [5] was the precursor of the computer-aided design programs, it computerized the drawing and allowed setting of parametric relationships between objects via a graphical user interface; DAC-1 (1963-1964) was a CAD-like program developed by General Motors. The first attempts to separate the CAAD from generic CAD were made in the ...
A swing saw is used to get ice out of a river for the Harbin International Ice and Snow Sculpture Festival each year. A swing saw is also used to cut ice out from the frozen surface of the Songhua River, China. [10] Many ice sculptures are made from the ice harvested this way. In some countries at high latitudes, even ice hotels and ice palaces ...