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Howell Torpedo
The Howell Automobile Torpedo was the first self-propelled torpedo produced in quantity by the United States Navy, which referred to it as the Howell Mark I torpedo. It was conceived by Lieutenant Commander John A. Howell, United States Navy, in 1870, using a 60 kg (130 lb) flywheel spun at a very high speed (10,000 to 12,000 rpm) to store energy and drive propellers. Design Because it had no complicated engine and fuel system, the Howell was much cheaper and easier to build than its main competitor, the Whitehead. In addition, unlike the Whitehead, the Howell was wakeless, not giving away the position of the firing vessel; its flywheel was, however, very noisy. It did demand a steam turbine to "spin up" the flywheel (a complication inherent to the design). Also unlike the contemporary Whitehead, the Howell kept running in a straight line, due to the gyroscopic effect of the flywheel. A wave coming from one side would tend to roll the Howell rather than deviate it. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anti-surface Warfare
Anti-surface warfare (ASuW or ASUW) is the branch of naval warfare concerned with the suppression of surface combatants. More generally, it is any weapons, sensors, or operations intended to attack or limit the effectiveness of an adversary's surface ships. Before the adoption of the submarine and naval aviation, all naval warfare consisted of anti-surface warfare. The distinct concept of an anti-surface warfare capability emerged after World War II, and literature on the subject as a distinct discipline is inherently dominated by the dynamics of the Cold War. Categories of anti-surface warfare Anti-surface warfare can be divided into four categories based on the platform from which weapons are launched: * Air (or aviation): Anti-surface warfare conducted by aircraft. Historically, this was conducted primarily through level- or dive-bombing, strafing runs or air-launching torpedoes (and in some cases by suicide attacks). Today, air ASuW is generally conducted by stand-off ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ludwig Obry
Ludwig Obry was an Austrian engineer and naval officer of the Austrian Navy who invented a gyroscopic device for steering a torpedo in 1895. The gyroscope had been invented by Leon Foucault in 1851, but industry ignored the device for nearly 50 years. In 1895 or 1896, Obry rediscovered Foucault's device and adapted it into a mechanism for steering a torpedo. This increased the weapon's accuracy from hundreds to thousands of yards. Obry then patented his device and sold the rights to Robert Whitehead, who incorporated the mechanism into the Whitehead torpedo. The device consisted of a bronze wheel weighing less than 1.5 pounds that was spun by an air jet. Obry's device was notable for solving many problems; how to get the gyroscope to begin rotating as quickly as possible, how to direct the vertical rudder A rudder is a primary control surface used to steer a ship, boat, submarine, hovercraft, airship, or other vehicle that moves through a fluid medium (usually air o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bliss-Leavitt Torpedo
The Bliss-Leavitt torpedo was a torpedo designed by Frank McDowell Leavitt and manufactured by the E. W. Bliss Company of Brooklyn, New York. It was put into service by the United States Navy in 1904 and variants of the design would remain in its inventory until the end of World War II. History The E. W. Bliss Company secured manufacturing rights to the Whitehead torpedo in 1892 and thereafter supplied the US Navy with this weapon. In 1904, an engineer with E. W. Bliss, Frank M. Leavitt, designed a torpedo with a "single-stage vertical turbine engine" that utilized compressed air preheated by alcohol. This design became the Bliss-Leavitt Mark 1 torpedo, the first non-Whitehead design after the Howell torpedo. The Mark 1 had a tendency to roll on its axis, affecting its directional stability. This was remedied by Lieutenant Gregory C. Davison who proposed a two-stage turbine design that drove contra-rotating propellers. This cancelled the torque effect of the single-stage ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naval Undersea Museum
The United States Naval Undersea Museum is a naval museum located at Keyport, Washington. It is one of the 10 Navy museums that are operated by the Naval History & Heritage Command. It sits next to a branch of the Naval Undersea Warfare Center. History The Naval Undersea Museum Foundation is a 501(c)(3) non-profit Washington State corporation established in 1980 as a philanthropic organization. Through fund-raising efforts of the Foundation, the Naval Undersea Museum and Conference Center complex in Keyport, Washington, opened in 1995. The Naval Undersea Museum combines naval history, undersea technology, and marine science. This new building, filled with more than of exhibits, holds the largest collection of naval undersea history and science artifacts in the United States. The museum's research library contains more than 6,500 volumes that support the exhibits and provide extensive information on undersea history, science, and operations. It also holds a complete set of World ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coronado, California
Coronado (Spanish language, Spanish for "Crowned") is a resort town, resort city in San Diego County, California, United States, across San Diego Bay from downtown San Diego. It was founded in the 1880s and incorporated in 1890. Its population was 20,192 in 2020. Coronado is a tied island which is connected to the mainland by a tombolo (a sandy isthmus) called Silver Strand (San Diego), Silver Strand. Along the coast of Southern California lie four islands that were spotted by Sebastián Vizcaíno, Sebastian Vizcaino and his crew. They named them "Los Coronados". In the mid-1880s, businessmen bought the peninsula near Los Coronados with hopes to turn it into a resort. Later in 1886, the owners of this peninsula hosted a naming contest with the people resulting in the name "Miramar" winning, which was soon overturned due to the public not being satisfied with the name, so they borrowed from their cousin islands "Los Coronados" and named it "Coronado". Coronado is the Spanish lan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Navy Marine Mammal Program
The U.S. Navy Marine Mammal Program (NMMP) is a program administered by the U.S. Navy which studies the military use of marine mammals - principally bottlenose dolphins and California sea lions - and trains animals to perform tasks such as ship and harbor protection, mine detection and clearance, and equipment recovery. The program is based in San Diego, California, where animals are housed and trained on an ongoing basis. NMMP animal teams have been deployed for use in combat zones, such as during the Vietnam War and the Iraq War. The program has been dogged by controversy over the treatment of the animals and speculation as to the nature of its mission and training. This has been due at least in part to the secrecy of the program, which was de-classified in the early 1990s. Since the program's inception, there have been ongoing animal welfare concerns, with many opposing the use of marine mammals in military applications, even in essentially non-combatant roles such as mine d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Howell Torpedo Blades
Howell may refer to: Places In the United States * Howell, Georgia, an unincorporated community * Howell, Evansville, a neighborhood in Indiana * Howell, Michigan, a city in Livingston County * Howell County, Missouri * Howell, Missouri, an unincorporated community * Howell, Utah, a town * Howell Mountains, California * Howell Island, Missouri - see Howell Island Conservation Area * Howell Township (other), several places Elsewhere * Howell, Lincolnshire, England, a hamlet ** Asgarby and Howell, a civil parish in Lincolnshire * Howell, New South Wales, Australia, a locality and ghost town * Mount Howell, Ellsworth Land, Antarctica * Howell Peak, Oates Land, Antarctica Businesses * Howell, Soskin, a defunct American publisher acquired by Crown Books * John Howell & Son, British building and engineering company * Howell Works, a 19th century pig iron producing facility in New Jersey, United States Other uses *Howell (name), a surname and given name, includin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Howell Torpedo Fly Wheel
Howell may refer to: Places In the United States * Howell, Georgia, an unincorporated community * Howell, Evansville, a neighborhood in Indiana * Howell, Michigan, a city in Livingston County * Howell County, Missouri * Howell, Missouri, an unincorporated community * Howell, Utah, a town * Howell Mountains, California * Howell Island, Missouri - see Howell Island Conservation Area * Howell Township (other), several places Elsewhere * Howell, Lincolnshire, England, a hamlet ** Asgarby and Howell, a civil parish in Lincolnshire * Howell, New South Wales, Australia, a locality and ghost town * Mount Howell, Ellsworth Land, Antarctica * Howell Peak, Oates Land, Antarctica Businesses * Howell, Soskin, a defunct American publisher acquired by Crown Books * John Howell & Son, British building and engineering company * Howell Works, a 19th century pig iron producing facility in New Jersey, United States Other uses *Howell (name), a surname and given name, includi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The New York Times
''The New York Times'' (''NYT'') is an American daily newspaper based in New York City. ''The New York Times'' covers domestic, national, and international news, and publishes opinion pieces, investigative reports, and reviews. As one of the longest-running newspapers in the United States, the ''Times'' serves as one of the country's Newspaper of record, newspapers of record. , ''The New York Times'' had 9.13 million total and 8.83 million online subscribers, both by significant margins the List of newspapers in the United States, highest numbers for any newspaper in the United States; the total also included 296,330 print subscribers, making the ''Times'' the second-largest newspaper by print circulation in the United States, following ''The Wall Street Journal'', also based in New York City. ''The New York Times'' is published by the New York Times Company; since 1896, the company has been chaired by the Ochs-Sulzberger family, whose current chairman and the paper's publ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhode Island
Rhode Island ( ) is a state in the New England region of the Northeastern United States. It borders Connecticut to its west; Massachusetts to its north and east; and the Atlantic Ocean to its south via Rhode Island Sound and Block Island Sound; and shares a small maritime border with New York, east of Long Island. Rhode Island is the smallest U.S. state by area and the seventh-least populous, with slightly more than 1.1 million residents . The state's population, however, has continually recorded growth in every decennial census since 1790, and it is the second-most densely populated state after New Jersey. The state takes its name from the eponymous island, though most of its land area is on the mainland. Providence is its capital and most populous city. Native Americans lived around Narragansett Bay before English settlers began arriving in the early 17th century. Rhode Island was unique among the Thirteen British Colonies in having been founded by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Providence, Rhode Island
Providence () is the List of capitals in the United States, capital and List of municipalities in Rhode Island, most populous city of the U.S. state of Rhode Island. The county seat of Providence County, Rhode Island, Providence County, it is one of the oldest cities in New England, founded in 1636 by Roger Williams, a Reformed Baptist theologian and religious exile from the Massachusetts Bay Colony. He named the area in honor of "God's merciful Providence" which he believed was responsible for revealing such a haven for him and his followers. The city developed as a busy port, as it is situated at the mouth of the Providence River at the head of Narragansett Bay. Providence was one of the first cities in the country to industrialize and became noted for its textile manufacturing and subsequent machine tool, jewelry, and silverware industries. Today, the city of Providence is home to eight hospitals and List of colleges and universities in Rhode Island#Institutions, eight instit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Myopia
Myopia, also known as near-sightedness and short-sightedness, is an eye condition where light from distant objects focuses in front of, instead of on, the retina. As a result, distant objects appear blurry, while close objects appear normal. Other symptoms may include headaches and eye strain. Severe myopia is associated with an increased risk of macular degeneration, retinal detachment, cataracts, and glaucoma. Myopia results from the length of the eyeball growing too long or less commonly the lens being too strong. It is a type of refractive error. Diagnosis is by the use of cycloplegics during eye examination. Tentative evidence indicates that the risk of myopia can be decreased by having young children spend more time outside. This decrease in risk may be related to natural light exposure. Myopia can be corrected with eyeglasses, contact lenses, or by refractive surgery. Eyeglasses are the simplest and safest method of correction. Contact lenses can provide a rela ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
