|
Space Derby
The space derby was a racing event for Cub Scouts in the Boy Scouts of America that is similar to the pinewood derby car race. Cub Scouts (the young-age division of the Boy Scouts) race miniature balsa wood gliders that are propelled by a rubber band and propeller. During the 1960s, this was also known as the "rocket derby". Construction The space derby kit consisted of a balsa wood block, propeller assembly, rubber bands, plastic sheet (for fins), and a mounting bracket. The wood block came out of the box with a drilled out center hole. The block was carved into the desired shape, sanded and painted. The mounting bracket and fins could be added either before or after painting. The rubber band was inserted through the center hole with one end on the propeller and the other held in a cross-piece at the rear. Race The completed gliders were wound up with as many as 100 or more turns on the propeller and suspended on a string from a separate bracket with the propeller held in plac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territories, nine Minor Outlying Islands, and 326 Indian reservations. The United States is also in free association with three Pacific Island sovereign states: the Federated States of Micronesia, the Marshall Islands, and the Republic of Palau. It is the world's third-largest country by both land and total area. It shares land borders with Canada to its north and with Mexico to its south and has maritime borders with the Bahamas, Cuba, Russia, and other nations. With a population of over 333 million, it is the most populous country in the Americas and the third most populous in the world. The national capital of the United States is Washington, D.C. and its most populous city and principal financial center is New York City. Paleo-Americ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boy Scouts Of America
The Boy Scouts of America (BSA, colloquially the Boy Scouts) is one of the largest scouting organizations and one of the largest youth organizations in the United States, with about 1.2 million youth participants. The BSA was founded in 1910, and since then, about 110 million Americans have participated in BSA programs. BSA is part of the international Scout Movement and became a founding member organization of the World Organization of the Scout Movement in 1922. The stated mission of the Boy Scouts of 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cub Scouting (Boy Scouts Of America)
Cub Scouting is part of the Scouting program of the Boy Scouts of America (BSA), available to boys and girls from kindergarten through fifth grade, or 5 to 10 years of age and their families. Its membership is the largest of the five main BSA divisions (Cub Scouting, Scouts BSA, Venturing, Exploring (Learning for Life), Exploring and Sea Scouting (Boy Scouts of America), Sea Scouting). Cub Scouting is part of the worldwide Scouting movement and aims to promote character development, citizenship training, personal fitness, and leadership. 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 boys from the core program, which was Scout troops focused on the 12- to 17-year-old age group; thus he opposed such a program for some time. In spite of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Balsa Wood
''Ochroma pyramidale'', commonly known as the balsa tree, is a large, fast-growing tree native to the Americas. It is the sole member of the genus ''Ochroma''. The tree is famous for its wide usage in woodworking, with the name ''balsa'' being the Spanish word for "raft." A deciduous angiosperm, ''Ochroma pyramidale'' can grow up to 30 m tall, and is classified as a hardwood despite the wood itself being very soft; it is the softest commercial hardwood and is widely used because of its light weight. Biology Balsa on Bota Hill, Limbe Botanical Garden, Cameroon">Limbe_Botanical_Garden.html" ;"title="Bota Hill, Limbe Botanical Garden">Bota Hill, Limbe Botanical Garden, Cameroon A member of the mallow family, ''Ochroma pyramidale'' is native from southern Mexico to southern Brazil, but can now be found in many other countries (Papua New Guinea, Indonesia, Thailand, Solomon Islands). It is a pioneer plant, which establishes itself in clearings in forests, either man-made ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rubber Band
A rubber band (also known as an elastic band, gum band or lacky band) is a loop of rubber, usually ring or oval shaped, and commonly used to hold multiple objects together. The rubber band was patented in England on March 17, 1845 by Stephen Perry. Most rubber bands are manufactured out of natural rubber or, especially at larger sizes, an elastomer, and are sold in a variety of sizes. Notable developments in the evolution of rubber bands began in 1923 when William H. Spencer obtained a few Goodyear inner tubes and cut the bands by hand in his basement, where he founded Alliance Rubber Company. Spencer persuaded the ''Akron Beacon Journal'' as well as the ''Tulsa World'' to try wrapping their newspapers with one of his rubber bands to prevent them from blowing across lawns. He went on to pioneer other new markets for rubber bands such as: agricultural and industrial applications and a myriad of other uses. Spencer obtained a patent on February 19, 1957 for a new "Method for Maki ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Propeller
A propeller (colloquially often called a screw if on a ship or an airscrew if on an aircraft) is a device with a rotating hub and radiating blades that are set at a pitch to form a helical spiral which, when rotated, exerts linear thrust upon a working fluid such as water or air. Propellers are used to pump fluid through a pipe or duct, or to create thrust to propel a boat through water or an aircraft through air. The blades are specially shaped so that their rotational motion through the fluid causes a pressure difference between the two surfaces of the blade by Bernoulli's principle which exerts force on the fluid. Most marine propellers are screw propellers with helical blades rotating on a propeller shaft (ship), propeller shaft with an approximately horizontal axis. History Early developments The principle employed in using a screw propeller is derived from sculling. In sculling, a single blade is moved through an arc, from side to side taking care to keep presenting the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Space Derby Rocket
Space is the boundless three-dimensional extent in which objects and events have relative position and direction. In classical physics, physical space is often conceived in three linear dimensions, although modern physicists usually consider it, with time, to be part of a boundless four-dimensional continuum known as spacetime. The concept of space is considered to be of fundamental importance to an understanding of the physical universe. However, disagreement continues between philosophers over whether it is itself an entity, a relationship between entities, or part of a conceptual framework. Debates concerning the nature, essence and the mode of existence of space date back to antiquity; namely, to treatises like the ''Timaeus'' of Plato, or Socrates in his reflections on what the Greeks called ''khôra'' (i.e. "space"), or in the ''Physics'' of Aristotle (Book IV, Delta) in the definition of ''topos'' (i.e. place), or in the later "geometrical conception of place" as "sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Raingutter Regatta
The raingutter regatta is a racing event for Cub Scouts in the Boy Scouts of America that is the sailboat equivalent of the pinewood derby. The sailboat kit consists of a seven-inch (178 mm) long balsa wood hull, a -inch mast, plastic sail, plastic rudder, and metal keel. Within the basic design rules, Scouts are free to paint and decorate their sailboats as they choose. Modifications for speed include the placement of the keel and rudder and the size, shape and location of the sail. A catamaran is an exceptionally fast design, although this modification is not allowed in all races. The boats are raced in a standard rain gutter that is ten feet long, placed on a table or saw horses, and filled to the top with water. The boats are propelled by blowing on the sail, either directly or through a drinking straw; the boat cannot be touched with hands or the straw. The first boat to reach the end of the gutter is the winner. The overall winner is determined by an elimination sy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scouting Events
Scouting, also known as the Scout Movement, is a worldwide youth movement employing the Scout method, a program of informal education with an emphasis on practical outdoor activities, including camping, woodcraft, aquatics, hiking, backpacking, and sports. Another widely recognized movement characteristic is the Scout uniform, by intent hiding all differences of social standing in a country and encouraging equality, with neckerchief and campaign hat or comparable headwear. Distinctive uniform insignia include the fleur-de-lis and the trefoil, as well as merit badges and other patches. In 1907, Robert Baden-Powell, a Lieutenant General in the British Army, held a Scouting encampment on Brownsea Island in England. Baden-Powell wrote ''Scouting for Boys'' (London, 1908), partly based on his earlier military books. The Scout Movement of both Boy Scouts and Girl Scouts was well established in the first decade of the twentieth century. Later, programs for younger children, such as W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Racing
In sport, racing is a competition of speed, in which competitors try to complete a given task in the shortest amount of time. Typically this involves traversing some distance, but it can be any other task involving speed to reach a specific goal. A race may be run continuously to finish or may be made up of several segments called heats, stages or legs. A heat is usually run over the same course at different times. A stage is a shorter section of a much longer course or a time trial. Early records of races are evident on pottery from ancient Greece, which depicted running men vying for first place. A chariot race is described in Homer's ''Iliad''. Etymology The word ''race'' comes from a Norse word. This Norse word arrived in France during the invading of Normandy and gave the word ''raz'' which means "swift water" in Brittany, as in a mill race; it can be found in "Pointe du Raz" (the most western point of France, in Brittany), and "''raz-de-marée''" (tsunami). The word rac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
