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Luna (tugboat)
''Luna'' is a historic tugboat normally berthed in Boston Harbor, Massachusetts. ''Luna'' was designed in 1930 by John G. Alden and built by M.M. Davis and Bethlehem Steel. She is listed on the National Register of Historic Places and is a U.S. National Historic Landmark. In 1985, the Luna was designated as a Boston Landmark by the Boston Landmarks Commission. ''Luna'' is the last surviving full-sized wooden ship-docking tug on the US Gulf and Atlantic coasts and was the world's first diesel-electric tugboat built for commercial service. These two distinctions have led to designation of ''Luna'' as a US National Historic Landmark. Today ''Luna'' is preserved in Boston Harbor, where her rehabilitation process has been underway since the tug was rescued from being broken up in 1995. ''Luna'' is the responsibility of the Luna Preservation Society and its progress is recorded in their website. Due to her wartime service with a civilian crew, ''Luna'' is also a member of the Naval ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Alden (naval Architect)
John Gale Alden (1884–1962) was an American naval architect and the founder of Alden Designs. Early life Alden was born in Troy, New York, in 1884, one of eight children, only four of whom survived. His family's summer holidays were spent on the Sakonnet in Rhode Island and on the Narragansett Bay, where he first learned about boats. He sailed his sister's flat-bottomed rowing boat using an umbrella as a sail and was said to be inspired by the local fisherman and regattas. At 18 years old, his father died, and Alden made the decision to train as a naval architect. He took courses at MIT and apprenticed with prominent naval architects Starling Burgess and Bowdoin B. Crowninshield, starting in 1902. In 1900, his family moved to Dorchester, Massachusetts, where the Grand Banks fishing schooners were docked. These were said to have inspired his later designs. A compulsive doodler, as a child he made countless sketches of the boats that were later to make him famous. Career In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles River
The Charles River ( Massachusett: ''Quinobequin)'' (sometimes called the River Charles or simply the Charles) is an river in eastern Massachusetts. It flows northeast from Hopkinton to Boston along a highly meandering route, that doubles back on itself several times and travels through 23 cities and towns before reaching the Atlantic Ocean. The indigenous Massachusett named it ''Quinobequin'', meaning "meandering". Hydrography The Charles River is fed by approximately 80 streams and several major aquifers as it flows , starting at Teresa Road just north of Echo Lake () in Hopkinton, passing through 23 cities and towns in eastern Massachusetts before emptying into Boston Harbor Boston Harbor is a natural harbor and estuary of Massachusetts Bay, and is located adjacent to the city of Boston, Massachusetts. It is home to the Port of Boston, a major shipping facility in the northeastern United States. History .... Thirty-three lakes and ponds and 35 munic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Armature (electrical Engineering)
In electrical engineering, the armature is the winding (or set of windings) of an electric machine which carries alternating current. The armature windings conduct AC even on DC machines, due to the commutator action (which periodically reverses current direction) or due to electronic commutation, as in brushless DC motors. The armature can be on either the rotor (rotating part) or the stator (stationary part), depending on the type of electric machine. The armature windings interact with the magnetic field ( magnetic flux) in the air-gap; the magnetic field is generated either by permanent magnets, or electromagnets formed by a conducting coil. The armature must carry current, so it is always a conductor or a conductive coil, oriented normal to both the field and to the direction of motion, torque (rotating machine), or force (linear machine). The armature's role is twofold. The first is to carry current across the field, thus creating shaft torque in a rotating machine or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric Generator
In electricity generation, a generator is a device that converts motive power (mechanical energy) or fuel-based power (chemical energy) into electric power for use in an external circuit. Sources of mechanical energy include steam turbines, gas turbines, water turbines, internal combustion engines, wind turbines and even hand cranks. The first electromagnetic generator, the Faraday disk, was invented in 1831 by British scientist Michael Faraday. Generators provide nearly all of the power for electric power grids. In addition to electromechanical designs, photovoltaic and fuel cell powered generators utilize solar power and hydrogen-based fuels, respectively, to generate electrical output. The reverse conversion of electrical energy into mechanical energy is done by an electric motor, and motors and generators have many similarities. Many motors can be mechanically driven to generate electricity; frequently they make acceptable manual generators. Terminology Electromagnetic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diesel Engine
The diesel engine, named after Rudolf Diesel, is an internal combustion engine in which ignition of the fuel is caused by the elevated temperature of the air in the cylinder due to mechanical compression; thus, the diesel engine is a so-called compression-ignition engine (CI engine). This contrasts with engines using spark plug-ignition of the air-fuel mixture, such as a petrol engine (gasoline engine) or a gas engine (using a gaseous fuel like natural gas or liquefied petroleum gas). Diesel engines work by compressing only air, or air plus residual combustion gases from the exhaust (known as exhaust gas recirculation (EGR)). Air is inducted into the chamber during the intake stroke, and compressed during the compression stroke. This increases the air temperature inside the cylinder to such a high degree that atomised diesel fuel injected into the combustion chamber ignites. With the fuel being injected into the air just before combustion, the dispersion of the fuel is une ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Winton Motor Carriage Company
The Winton Motor Carriage Company was a pioneer United States automobile manufacturer based in Cleveland, Ohio. Winton was one of the first American companies to sell a motor car. In 1912 Winton became one of the first American manufacturers of diesel engines. History 1896–1903 In 1896, Scottish immigrant Alexander Winton, owner of the Winton Bicycle Company, turned from bicycle production to an experimental single-cylinder automobile before starting his car company. The company was incorporated on March 15, 1897. Its first automobiles were built by hand. Each vehicle had painted sides, padded seats, a leather roof, and gas lamps. B.F. Goodrich made the tires. By this time, Winton had already produced two fully operational prototype automobiles. In May of that year, the 10 hp (7.5 kW) model achieved the astonishing speed of on a test around a Cleveland horse track. However, the new invention was still subject to much skepticism , so to prove his automobile's d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boothbay Harbor, Maine
Boothbay Harbor is a town in Lincoln County, Maine, United States. The population was 2,027 at the 2020 census. It includes the villages of Bayville, Sprucewold, and West Boothbay Harbor. During summer months, the entire Boothbay Harbor region is a popular yachting and tourist destination. The ZIP Code is 04538, and the community is served by the 633 telephone exchange in area code 207. History The Abenaki people that lived in the region called it Winnegance. The first European presence in the region was an English fishing outpost called Cape Newagen in 1623. A Englishman by the name of Henry Curtis purchased the right to settle Winnegance from the Abenaki Sachem Mowhotiwormet in 1666. However, the English were driven from their settlements by the Abenaki in 1676 during King Philip's War in 1676. The colonists returned after the war ended. In 1689 during King William's War, they were driven out again. Winnegance was abandoned entirely, and remained a desolate waste for 40 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cape Cod Canal
The Cape Cod Canal is an artificial waterway in the U.S. state of Massachusetts connecting Cape Cod Bay in the north to Buzzards Bay in the south, and is part of the Atlantic Intracoastal Waterway. The approximately canal traverses the neck of land joining Cape Cod to the state's mainland. It mostly follows tidal rivers widened to and deepened to at mean low water, shaving off the journey around the Cape for its approximately 14,000 annual users. Most of the canal is located in the town of Bourne, but its northeastern terminus is in Sandwich. Scusset Beach State Reservation lies near the canal's north entrance, and the Massachusetts Maritime Academy is near its south. A swift-running current changes direction every six hours and can reach during the receding ebb tide. The waterway is maintained by the United States Army Corps of Engineers and has no toll fees. It is spanned by the Cape Cod Canal Railroad Bridge, the Bourne Bridge, and the Sagamore Bridge. Traffic lights ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bath, Maine
Bath is a city in Sagadahoc County, Maine, in the United States. The population was 8,766 at the 2020 census. It is the county seat of Sagadahoc County, which includes one city and 10 towns. The city is popular with tourists, many drawn by its 19th-century architecture. It is home to the Bath Iron Works and Heritage Days Festival, held annually on the Fourth of July weekend. It is commonly known as "The City of Ships" because of all the sailing ships that were built in the Bath shipyards. Bath is part of the metropolitan statistical area of Greater Portland. History Abenaki Indians called the area Sagadahoc, meaning "mouth of big river". It was a reference to the Kennebec River, which Samuel de Champlain explored in 1605. Popham Colony was established in 1607 downstream, together with Fort St George. The settlement failed due to harsh weather and lack of leadership, but the colonists built the New World's first oceangoing vessel constructed by English shipwrights, the ''Vi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
US Army
The United States Army (USA) is the land service branch of the United States Armed Forces. It is one of the eight U.S. uniformed services, and is designated as the Army of the United States in the U.S. Constitution.Article II, section 2, clause 1 of the United States Constitution (1789). See alsTitle 10, Subtitle B, Chapter 301, Section 3001 The oldest and most senior branch of the U.S. military in order of precedence, the modern U.S. Army has its roots in the Continental Army, which was formed 14 June 1775 to fight the American Revolutionary War (1775–1783)—before the United States was established as a country. After the Revolutionary War, the Congress of the Confederation created the United States Army on 3 June 1784 to replace the disbanded Continental Army.Library of CongressJournals of the Continental Congress, Volume 27/ref> The United States Army considers itself to be a continuation of the Continental Army, and thus considers its institutional inception to be the o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
US Navy
The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the largest and most powerful navy in the world, with the estimated tonnage of its active battle fleet alone exceeding the next 13 navies combined, including 11 allies or partner nations of the United States as of 2015. It has the highest combined battle fleet tonnage (4,635,628 tonnes as of 2019) and the world's largest aircraft carrier fleet, with eleven in service, two new carriers under construction, and five other carriers planned. With 336,978 personnel on active duty and 101,583 in the Ready Reserve, the United States Navy is the third largest of the United States military service branches in terms of personnel. It has 290 deployable combat vessels and more than 2,623 operational aircraft . The United States Navy traces its origins to the Continental Navy, which was established during the American Revolut ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World War II
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing military alliances: the Allies and the Axis powers. World War II was a total war that directly involved more than 100 million personnel from more than 30 countries. The major participants in the war threw their entire economic, industrial, and scientific capabilities behind the war effort, blurring the distinction between civilian and military resources. Aircraft played a major role in the conflict, enabling the strategic bombing of population centres and deploying the only two nuclear weapons ever used in war. World War II was by far the deadliest conflict in human history; it resulted in 70 to 85 million fatalities, mostly among civilians. Tens of millions died due to genocides (including the Holocaust), starvation, ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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