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Scale Modeling
A scale model is a physical model that is geometrically similar to an object (known as the ''prototype''). Scale models are generally smaller than large prototypes such as vehicles, buildings, or people; but may be larger than small prototypes such as anatomical structures or subatomic particles. Models built to the same scale as the prototype are called ''mockups''. Scale models are used as tools in engineering design and testing, promotion and sales, filmmaking special effects, military strategy, and hobbies such as rail transport modeling, wargaming and racing; and as toys. Model building is also pursued as a hobby for the sake of artisanship. Scale models are constructed of plastic, wood, or metal. They are usually painted with enamel, lacquer, or acrylics. Model prototypes include all types of vehicles (railroad trains, cars, trucks, military vehicles, aircraft, and spacecraft), buildings, people, and science fiction themes (spaceships and robots). Methods Mod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scale Model Of The Tower Of London In The Tower Of London
Scale or scales may refer to: Mathematics * Scale (descriptive set theory), an object defined on a set of points * Scale (ratio), the ratio of a linear dimension of a model to the corresponding dimension of the original * Scale factor, a number which scales, or multiplies, some quantity * Long and short scales, how powers of ten are named and grouped in large numbers * Scale parameter, a description of the spread or dispersion of a probability distribution * Feature scaling, a method used to normalize the range of independent variables or features of data * Scale (analytical tool) Measurements * Scale (map), the ratio of the distance on a map to the corresponding actual distance * Scale (geography) * Weighing scale, an instrument used to measure mass * Scale (ratio), the ratio of the linear dimension of the model to the same dimension of the original * Spatial scale, a classification of sizes * Scale ruler, a tool for measuring lengths and transferring measurements at a fixed rat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Foot (unit)
The foot (standard symbol: ft) is a Units of measurement, unit of length in the imperial units, British imperial and United States customary units, United States customary systems of metrology, measurement. The prime (symbol), prime symbol, , is commonly used to represent the foot. In both customary and imperial units, one foot comprises 12 inches, and one yard comprises three feet. Since international yard and pound, an international agreement in 1959, the foot is defined as equal to exactly 0.3048 meters. Historically, the "foot" was a part of many local systems of units, including the Ancient Greek units of measurement, Greek, Ancient Roman units of measurement, Roman, Chinese units of measurement, Chinese, Units of measurement in France before the French Revolution, French, and English units, English systems. It varied in length from country to country, from city to city, and sometimes from trade to trade. Its length was usually between 250 mm and 335 mm and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Computer-generated Imagery
Computer-generated imagery (CGI) is a specific-technology or application of computer graphics for creating or improving images in Digital art, art, Publishing, printed media, Training simulation, simulators, videos and video games. These images are either static (i.e. still images) or dynamic (i.e. moving images). CGI both refers to 2D computer graphics and (more frequently) 3D computer graphics with the purpose of designing characters, virtual worlds, or scenes and Visual effects, special effects (in films, television programs, commercials, etc.). The application of CGI for creating/improving animations is called ''computer animation'', or ''CGI animation''. History The first feature film to use CGI as well as the composition of live-action film with CGI was ''Vertigo (film), Vertigo'', which used abstract computer graphics by John Whitney (animator), John Whitney in the opening credits of the film. The first feature film to make use of CGI with live action in the storyline of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tungsten Carbide
Tungsten carbide (chemical formula: ) is a carbide containing equal parts of tungsten and carbon atoms. In its most basic form, tungsten carbide is a fine gray powder, but it can be pressed and formed into shapes through sintering for use in industrial machinery, engineering facilities, molding blocks, cutting tools, chisels, abrasives, armor-piercing bullets and jewelry. Tungsten carbide is approximately three times as stiff as steel, with a Young's modulus of approximately 530–700 GPa, and is twice as dense as steel. It is comparable with corundum (α- ) in hardness, approaching that of a diamond, and can be polished and finished only with abrasives of superior hardness such as cubic boron nitride and diamond. Tungsten carbide tools can be operated at cutting speeds much higher than high-speed steel (a special steel blend for cutting tools). Tungsten carbide powder was first synthesized by H. Moissan in 1893, and the industrial production of the cemented form starte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cub Scouting (Boy Scouts Of America)
Cub Scouts is a Scouting America program available to coeducational children from kindergarten through fifth grade (or 5 to 10 years of age) and their families. Its membership is the largest of the five main Scouting America divisions (Cub Scouting, Scouts BSA, Venturing, Exploring (Learning for Life), Exploring and Sea Scouting (Boy Scouts of America), Sea Scouting). Cub Scouts is part of the worldwide Scouting movement and aims to promote character development, citizenship training, personal fitness, and leadership. Cub Scouts are organized into local packs where they complete requirements to advance in rank as well as engage in pack events such as the Pinewood derby, Pinewood Derby. Origins As early as 1911, Ernest Thompson Seton had developed a prototype program he named ''Cub Scouts of America'' that was never implemented. James E. West (Scouting), James E. West felt that having BSA divisions for younger boys (those under 12; the "younger boy problem") would draw away boy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pinewood Derby
The Pinewood Derby is the wood car racing event of the Cub Scout Program of the Scouting America. Pinewood derbies are often run by packs of the Cub Scouts program. With the help of adults, Cub Scouts build their own unpowered, unmanned miniature cars from wood, usually from kits containing a block of pine wood, plastic wheels, stickers with numbers, and metal axles. With the popularity of the pinewood derby, other organizations have developed similar events. Pinewood derby is a registered trademark of the Boy Scouts of America so most use different names. Each derby has slightly different rules for making and racing their cars. A small industry has developed to provide organizer equipment (e.g. tracks, timers, and scales) and awards (e.g. trophies and ribbons). Similar Cub Scouting events include the raingutter regatta (a race for miniature boats) and the space derby (a race for rubber band-driven propeller shuttles). Origins The first pinewood derby was held on at the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boy Scouts Of America
Scouting America is the largest scouting organization and one of the largest List of youth organizations, youth organizations in the United States, with over 1 million youth, including nearly 200,000 female participants. Founded as the Boy Scouts of America in 1910, about 130 million Americans have participated in its programs, which are served by 465,000 adult volunteers. The organization became a founding member of the World Organization of the Scout Movement in 1922. The stated mission of Scouting America is to "prepare young people to make ethical and moral choices over their lifetimes by instilling in them the values of the Scout Oath and Law." Youth are trained in responsible citizenship, character development, and self-reliance through participation in a wide range of outdoor activities, educational programs, and, at older age levels, career-oriented programs in partnership with community organizations. For younger members, the Scout method is part of the program to inst ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Model Engine
A model engine is a small internal combustion engine typically used to power a radio-controlled aircraft, radio-controlled car, radio-controlled boat, free flight, control line aircraft, or ground-running tether car model. Because of the square–cube law, the behaviour of many engines does not always scale up or down at the same rate as the machine's size; usually at best causing a dramatic loss of power or efficiency, and at worst causing them not to work at all. Methanol and nitromethane are common fuels. Overview The fully functional, albeit small, engines vary from the most common single-cylinder two-stroke to the exotic single and multiple-cylinder four-stroke, the latter taking shape in boxer, v-twin, inline and radial form, a few Wankel engine designs are also used. Most model engines run on a blend of methanol, nitromethane, and lubricant (either castor or synthetic oil). Two-stroke model engines, most often designed since 1970 with Schnuerle por ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radio-controlled Aircraft
A radio-controlled aircraft (often called RC aircraft or RC plane) is a small flying machine that is radio controlled by an operator on the ground using a hand-held radio transmitter. The transmitter continuously communicates with a receiver (radio), receiver within the craft that sends signals to servomechanisms (servos) which move the Flight control surfaces, control surfaces based on the position of joysticks on the transmitter. The control surfaces, in turn, directly affect the orientation of the plane. Flying RC aircraft as a hobby grew substantially from the 2000s with improvements in the cost, weight, performance, and capabilities of motors, battery (electricity), batteries and electronics. Scientific, government, and military organizations are also using RC aircraft for experiments, gathering weather readings, aerodynamics, aerodynamic modeling, and testing. A wide variety of models, parts, and styles is available for the DIY market. Nowadays, distinct from recreational c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Model Rocket
A model rocket is a small rocket designed to reach low altitudes (e.g., for a model) and #Model rocket recovery methods, be recovered by a variety of means. According to the United States National Association of Rocketry, National Association of Rocketry (NAR)'s Safety Code, model rockets are constructed out of lightweight and non metallic parts. The materials are typically paper, cardboard, balsa wood or plastic. The code also provides guidelines for motor use, launch site selection, launch methods, launcher placement, recovery system design and deployment and more. Since the early 1960s, a copy of the Model Rocket Safety Code has been provided with most model rocket kits and motors. Despite its inherent association with extremely flammable substances and objects with a pointed tip traveling at high speeds, model rocketry historically has proven to be a very safe hobby and has been credited as a significant source of inspiration for children who have eventually become scient ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kitbashing
Kitbashing or model bashing is the practice of making a new scale model by taking pieces out of kits. These pieces may be added to a custom project or to another kit. For professional modelmakers, kitbashing is used to create concept models for detailing movie special effects. Commercial model kits are a ready source of "detailing", providing any number of identical, mass-produced components that can be used to add fine detail to an existing model. Professionals often kitbash to build prototype parts which are then recreated with lightweight materials. Purposes, history, and methods For the hobbyist, kitbashing saves time that would be spent scratch building an entire model. Hobbyists may kitbash to create a model of a subject (real or imaginary) for which there is not a commercial kit. Although it has a long history, kitbashing came to the attention of a wider public via the fine modelwork seen in TV series such as '' Thunderbirds, Star Trek'' and the films '' 2001: A Spac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
