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Blackbird (wind-powered Vehicle)
''Blackbird'' is an experimental wind-powered vehicle, built in 2010 to demonstrate that it is possible for such a vehicle to go directly downwind faster than the wind (sometimes abbreviated as DDWFTTW). ''Blackbird'' employs a rotor connected to the wheels and does not have a motor, battery, or flywheel. It was constructed by Rick Cavallaro and John Borton of Sportvision, sponsored by Google and Joby Energy in association with the San Jose State University aeronautics department. In a test supervised and recognized by the North American Land Sailing Association in July 2010, Cavallaro achieved a speed of sailing directly downwind in winds: almost three times the speed of the wind. - Explanation of the Blackbird workings and its physics. In 2012, ''Blackbird'' also demonstrated sailing directly upwind with twice the speed of the wind. Theory Rotor-powered vehicles are wind-powered vehicles that use ''rotors''—instead of sails—which may have a shroud around them (ducted fa ...
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Brain Teaser
A brain teaser is a form of puzzle that requires thought to solve. It often requires thinking in unconventional ways with given constraints in mind; sometimes it also involves lateral thinking. Logic puzzles and riddles are specific types of brain teasers. One of the earliest known brain teaser enthusiasts was the Greek mathematician Archimedes. He devised mathematical problems for his contemporaries to solve. Example :Q: ''If three hens lay three eggs in three days, how many eggs does a (statistical) hen lay in one day?'' :A1: ''One third.'' (Note: 3 hens = 3 eggs / 3 days → 3 hens = (3 / 3) (eggs / days) → 1 hen = (1 / 3) (egg / days)) :A2: ''Zero or one'' (it's hard to lay a third of an egg). One can argue about the answers of many brain teasers; in the given example with hens, one might claim that all the eggs in the question were laid in the first day, so the answer would be three. :Q: ''Mary's father has five daughters: 1. Nana, 2. Nene, 3. Nini, 4. Nono. What ...
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List Of Motorized Trikes
Motorized tricycles, also called trikes, are sometimes considered cars. There are three typical configurations: motorized bicycle with sidecar; two wheels in the rear, one in the front (aka trike); and two in front, one in the rear (aka reverse trike). However, language and definitions vary. One of the most successful trikes of its day was the De Dion-Bouton tricycle; from 1897 until the start of the 20th century about 15,000 licensed copies were sold, with De Dion Bouton usually supplying the engines, and it was overall the most popular motor vehicle in Europe. Trikes have caused tautological confusion and simply defied typical two and four-wheel classifications, especially in the 21st century. Regardless, many popular motorcycles and/or automobiles had three wheels. Examples 17th century *Stephan Farffler's trike 18th century * Nicolas-Joseph Cugnot#First self-propelled vehicle, Cugnot's ''fardier à vapeur'' (steam powered) 19th century * Ariel Motorcycles, Ariel 2.25&n ...
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Greenbird
''Greenbird'' is a wind-powered vehicle that broke the land speed record for sail-powered vehicles at the dry Ivanpah Lake on March 26, 2009. It was built by the British engineer Richard Jenkins. ''Greenbird'' reached a peak speed of 126.1 mph (202.9 km/h). Construction ''Greenbird'', sponsored by Ecotricity, was described as being "a very high performance sailboat". It uses a rigid vertical wing, instead of the conventional sail, to generate thrust, in the same manner that the wing of an aeroplane generates lift. The only metal in the vehicle is in the wheels and the wing bearings; the remainder is made of carbon composite materials. The vehicle weighs about six hundred kilograms. According to Jenkins, the light weight and aerodynamic shape of the vehicle allows it to attain speeds three to five times faster than the speed of the wind. ''Greenbird'' is the fifth in a series of wind-powered land vehicles that Jenkins had constructed in his efforts to break the spee ...
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Bill Nye
William Sanford Nye (; born November 27, 1955) is an American science communicator, television presenter, and former mechanical engineer. He is best known as the host of the science education television show '' Bill Nye the Science Guy'' (1993–1999) and as a science educator in pop culture. Born in Washington, D.C., Nye began his career as a mechanical engineer for Boeing in Seattle, where he invented a hydraulic resonance suppressor tube used on 747 airplanes. In 1986, he left Boeing to pursue comedy, writing and performing for the local sketch television show '' Almost Live!'', where he regularly conducted wacky scientific experiments. Aspiring to become the next Mr. Wizard, Nye successfully pitched the children's television program ''Bill Nye the Science Guy'' to Seattle's public television station, KCTS-TV. The show—which proudly proclaimed in its theme song that "science rules!"—ran from 1993 to 1998 in national TV syndication. Known for its "high-energy pres ...
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Neil DeGrasse Tyson
Neil deGrasse Tyson ( or ; born October 5, 1958) is an American astrophysics, astrophysicist, author, and science communication, science communicator. Tyson studied at Harvard University, the University of Texas at Austin, and Columbia University. From 1991 to 1994, he was a Postdoctoral researcher, postdoctoral research associate at Princeton University. In 1994, he joined the Hayden Planetarium as a staff scientist and the Princeton faculty as a visiting research scientist and lecturer. In 1996, he became director of the planetarium and oversaw its $210 million reconstruction project, which was completed in 2000. Since 1996, he has been the director of the Hayden Planetarium at the Rose Center for Earth and Space in New York City. The center is part of the American Museum of Natural History, where Tyson founded the Department of Astrophysics in 1997 and has been a research associate in the department since 2003. From 1995 to 2005, Tyson wrote monthly essays in the "Univers ...
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Derek Muller
Derek Alexander Muller (born 9 November 1982) is a science communicator and media personality, best known for his YouTube channel Veritasium, which has over 17.8 million subscribers and 3.3 billion views as of April 2025. He currently lives in Los Angeles. Early life and education Muller was born to South African parents in Traralgon, Victoria, Australia. His family moved to Vancouver, British Columbia, Canada, when he was 18 months old. In 2000, Muller graduated from West Vancouver Secondary School. In 2004, Muller graduated from Queen's University in Kingston, Ontario, with a Bachelor of Applied Science in Engineering Physics. Muller moved to Australia to study film-making; however, he instead enrolled for a Ph.D. in physics education research from the University of Sydney, which he completed in 2008 with a thesis: ''Designing Effective Multimedia for Physics Education''. Career Muller has been listed as a team member of the ABC television program ''Catalyst'' since ...
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Alexander Kusenko
Alexander Kusenko is a theoretical physicist, astrophysicist, and cosmologist who is currently a Professor of Physics and Astronomy at the University of California, Los Angeles (UCLA). In addition, Kusenko holds an appointment of Senior Scientist at the Kavli Institute for the Physics and Mathematics of the Universe (IPMU) since February 2008. He has served as a general member of the board of Aspen Center for Physics 2004-2019. Kusenko was awarded the status of Fellow of the American Physical Society in 2008 for ''original and seminal contributions to particle physics, astrophysics, and cosmology''. In 2021, Kusenko was awarded a Simons Fellowship in Theoretical Physics. In 2021, he entered a $10,000 wager with Derek Muller over the possibility of sailing straight downwind faster than the wind, which he later conceded. References External links *Scientific publications of Alexander Kusenkoon INSPIRE-HEP *''Scientists may have solved mystery of matter’s origin'' by Sa ...
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University Of California, Los Angeles
The University of California, Los Angeles (UCLA) is a public university, public Land-grant university, land-grant research university in Los Angeles, California, United States. Its academic roots were established in 1881 as a normal school then known as the southern branch of the California State Normal School which later evolved into San Jose State University, San José State University. The branch was transferred to the University of California to become the Southern Branch of the University of California in 1919, making it the second-oldest of the ten-campus University of California system after the University of California, Berkeley. UCLA offers 337 undergraduate and graduate degree programs in a range of disciplines, enrolling about 31,600 undergraduate and 14,300 graduate and professional students annually. It received 174,914 undergraduate applications for Fall 2022, including transfers, the most of any Higher education in the United States, university in the United Stat ...
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El Mirage Dry Lake
El Mirage Lake is a dry lake bed in the northwestern Victor Valley of the central Mojave Desert, within San Bernardino County, California. The lake is located about west-northwest of the town of Adelanto and north of Highway 18 in San Bernardino County. The dry lake, at an elevation of , is approximately long. El Mirage Off-Highway Vehicle Recreation Area (OHV) Formerly open to all visitors, it has been a popular spot for many activities ranging from gyrocopter and ultralight aircraft operations to automobile racing. The Bureau of Land Management has installed a fence to enclose the lake and some of the surrounding areas, and now charges fees for entry to what is now known as the El Mirage Off-Highway Vehicle (OHV) Recreation Area. It is a popular filming location for automobile commercials. Permits for the Recreation Area can be purchased on-site, at local retailers and online. Annual permits are $90, weekly permits are $30, and daily permits are $15. Private aircraft ma ...
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YouTube
YouTube is an American social media and online video sharing platform owned by Google. YouTube was founded on February 14, 2005, by Steve Chen, Chad Hurley, and Jawed Karim who were three former employees of PayPal. Headquartered in San Bruno, California, it is the second-most-visited website in the world, after Google Search. In January 2024, YouTube had more than 2.7billion monthly active users, who collectively watched more than one billion hours of videos every day. , videos were being uploaded to the platform at a rate of more than 500 hours of content per minute, and , there were approximately 14.8billion videos in total. On November 13, 2006, YouTube was purchased by Google for $1.65 billion (equivalent to $ billion in ). Google expanded YouTube's business model of generating revenue from advertisements alone, to offering paid content such as movies and exclusive content produced by and for YouTube. It also offers YouTube Premium, a paid subs ...
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Douglas Aircraft Company
The Douglas Aircraft Company was an American aerospace manufacturer, aerospace and military, defense company based in Southern California. Founded in 1921 by Donald Wills Douglas Sr., it merged with McDonnell Aircraft in 1967 to form McDonnell Douglas, where it operated as a division. History 1920s The company was founded as the Douglas Company by Donald Wills Douglas Sr. on July 22, 1921, in Santa Monica, California, following dissolution of the Davis-Douglas Company. An early claim to fame was the first aerial circumnavigation, first circumnavigation of the world by air in Douglas airplanes in 1924. In 1923, the U.S. Army Air Service was interested in carrying out a mission to circumnavigate the Earth for the first time by aircraft, a program called "World Flight". Donald Douglas proposed a modified Douglas DT to meet the Army's needs. The two-place, open cockpit DT biplane torpedo bomber had previously been produced for the United States Navy, U.S. Navy.Rumerman, Judy. "The D ...
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