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PT-boat
A PT boat (short for patrol torpedo boat) was a motor torpedo boat used by the United States Navy in World War II. It was small, fast, and inexpensive to build, valued for its maneuverability and speed but hampered at the beginning of the war by ineffective torpedoes, limited armament, and comparatively fragile construction that limited some of the variants to coastal waters. In the USN they were organized in Motor Torpedo Boat Squadrons (MTBRONs). The PT boat was very different from the first generation of torpedo boat, which had been developed at the end of the 19th century and featured a displacement hull form. These first generation torpedo boats rode low in the water, displaced up to 300 tons, and had a top speed of . During World War I Italy, the US, and UK developed the first high-performance gasoline-powered motor torpedo boats (often with top speeds over ) and corresponding torpedo tactics, but these projects were all quickly disbanded after the Armistice. World Wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Packard 1A-2500
The Packard 1A-2500 is an American V-12 liquid-cooled aircraft engine designed by Packard in 1924 as a successor to the World War I-era Liberty L-12. Five aero variants were produced, of which the 3A-2500 was the most numerous. Three marine versions, used most prominently in American World War II PT-boats, the ''3M-2500'', ''4M-2500'', and ''5M-2500'', were also derived from it. Applications * Boeing TB *Heinkel HE 8 *Martin T3M *Naval Aircraft Factory PN *Huff-Daland LB-1 * PT boats - marine versions of the 3M/4M/5M-2500 * Packard-Bentley one-off race car *USSR World War II torpedo boats and sub-chasers, which were fitted with 535 4M-2500 engines with W-8 modification under Lend-Lease Variants ;1A-2500:1924, 800 hp. Six built. ;2A-2500 :1925, 800 hp. 75 built. ;2A-2540:? Huff-Daland XHB-1 ;3A-2500:1926, Geared propeller drive option, 800 hp. 175 built. ;4A-2500:1927, fitted with a supercharger, 900 hp. One built. ;5A-2500:1930, experimental use only, 1500 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
20 Mm Oerlikon Cannon
The Oerlikon 20 mm cannon is a series of autocannons, based on an original German Becker Type M2 20 mm cannon design that appeared very early in World War I. It was widely produced by Oerlikon Contraves and others, with various models employed by both Allied and Axis forces during World War II. Many versions of the cannon are still used today. Blowback-operated models History Origins During World War I, the German industrialist Reinhold Becker developed a 20 mm caliber cannon, known now as the 20 mm Becker using the advanced primer ignition blowback (API blowback) method of operation. This used a 20×70mmRB cartridge and had a cyclic rate of fire of 300 rpm. It was used on a limited scale as an aircraft gun on ''Luftstreitkräfte'' warplanes, and an anti-aircraft gun towards the end of that war. Because the Treaty of Versailles banned further production of such weapons in Germany, the patents and design works were transferred in 1919 to the Swiss firm SEMAG (''Seebac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Armistice
An armistice is a formal agreement of warring parties to stop fighting. It is not necessarily the end of a war, as it may constitute only a cessation of hostilities while an attempt is made to negotiate a lasting peace. It is derived from the Latin ''arma'', meaning "arms" (as in weapons) and ''-stitium'', meaning "a stopping". The United Nations Security Council often imposes, or tries to impose, cease-fire resolutions on parties in modern conflicts. Armistices are always negotiated between the parties themselves and are thus generally seen as more binding than non-mandatory UN cease-fire resolutions in modern international law. An armistice is a '' modus vivendi'' and is not the same as a peace treaty, which may take months or even years to agree on. The 1953 Korean War Armistice Agreement is a major example of an armistice which has not been followed by a peace treaty. An armistice is also different from a truce or ceasefire, which refer to a temporary cessation of hostiliti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greenport Basin And Construction Company
The Greenport Basin and Construction Company, known by various names throughout its history, but most recently named the Greenport Yacht & Shipbuilding Company, is a shipbuilder in Greenport, Suffolk County, New York. It was established in the 19th century by brothers Pliny C. Brigham and Theodore W. Brigham.Kenneth J. Blume, ''Historical Dictionary of the U.S. Maritime Industry'', p. 203, 2011.Greenport Basin, Greenport NY ," ''Shipbuildinghistory.com''. One local history relates: The company built dozens of ships for the during |
General Board Of The United States Navy
The General Board of the United States Navy was an advisory body of the United States Navy, somewhat akin to a naval general staff and somewhat not. The General Board was established by general order 544, issued on March 13, 1900 by Secretary of the Navy John Davis Long. The order was officially recognized by Congress in 1916. The General Board was disbanded in 1951. Origins "The war with Spain had underlined the need for adequate staff work and the success of the War Board had pointed the way for the future. Among the most persistent advocates of a general staff for the Navy was Captain Henry C. Taylor. He had first laid plans for such a staff before Roosevelt in May 1897; now in 1900 he brought the idea once more to the attention of Secretary Long. Long, however, was reluctant to risk a fight with his entrenched bureau chiefs, hesitant about allowing the professional officers wide powers outside civilian control, and rightly dubious whether Congress could be brought to ap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John I
John I may refer to: People * John I (bishop of Jerusalem) * John Chrysostom (349 – c. 407), Patriarch of Constantinople * John of Antioch (died 441) * Pope John I, Pope from 523 to 526 * John I (exarch) (died 615), Exarch of Ravenna * John I of Naples (died c. 719) * John of Abkhazia (ruled 878/879–880) * John I of Gaeta (died c. 933) * John I Tzimiskes (c. 925 – 976), Byzantine Emperor * John I of Amalfi (died 1007) * John I of Ponthieu (c. 1147 – 1191) * John I (archbishop of Trier) (c. 1140-1212), Archbishop of Trier from 1190 to 1212 * John of England (1166–1216), King of England, Lord of Ireland, Duke of Normandy and Aquitaine and Count of Anjou * John I of Sweden (c. 1201 – 1222) * John of Brienne (c. 1148 – 1237), king of Jerusalem * John I of Trebizond (died 1238) * John I of Dreux (1215–1249) * John I of Avesnes (1218–1257), Count of Hainaut * John of Brunswick, Duke of Lüneburg (c. 1242–1277) * John I, Count of Blois (died 1280) * John I, Duke of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Whitehead Mark 5 Torpedo
The Whitehead Mark 5 torpedo was a Whitehead torpedo adopted by the United States Navy for use in an anti-surface ship role in 1910. The Mark 5 was the first torpedo to be manufactured by a foreign company, the Whitehead facility in the United Kingdom, and in 1908, by the Naval Torpedo Station in Newport, Rhode Island. It was also the first torpedo to allow the firing ship to vary its speed and range. Characteristics The Mark 5 was a "hot-running" (powered by heated air) torpedo, as opposed to previous Whitehead designs, which were "cold-running". It was similar in performance to the Bliss-Leavitt torpedoes of that era. Around 500 units were produced by the Naval Torpedo Station and Vickers Limited. The Mark 5 had variable speed; at a high speed of 40 knots, it had a range of 1000 yards. A low speed of 27 knots allowed the weapon a range of 4000 yards; at medium speed of 36 knots, its range was 2000 yards. This variable speed was set before loading the torpedo in its tube by adju ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Josephus Daniels
Josephus Daniels (May 18, 1862 – January 15, 1948) was an American newspaper editor and publisher from the 1880s until his death, who controlled Raleigh's ''News & Observer'', at the time North Carolina's largest newspaper, for decades. A Democrat, he was appointed by President Woodrow Wilson to serve as Secretary of the Navy during World War I. He became a close friend and supporter of Franklin D. Roosevelt, who served as his Assistant Secretary of the Navy and later was elected as United States president. Roosevelt appointed Daniels as his U.S. Ambassador to Mexico, serving from 1933 to 1941. Daniels was a vehement white supremacist and segregationist. Along with Charles Brantley Aycock and Furnifold McLendel Simmons, he was a leading perpetrator of the Wilmington insurrection of 1898. As Secretary of the Navy, Daniels handled policy and formalities in World War I while his top aide, Roosevelt, handled the major wartime decisions. After the Mexican Revolution, as ambassad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hickman Sea Sled
The Hickman Sea Sled is an inverted vee planing hull invented by Albert Hickman. The Sea Sled is a direct forerunner of the modern high speed catamaran or tunnel hull. The reduced friction is due to a "trapped" gas film between the hull surface and water. A similar effect is seen in super-cavitating torpedoes where a gas generator creates a film separation to water friction. "A new type of vessel, which promises to revolutionize water craft and which takes the same place on the water that the automobile does on land" - ''Scientific American'' 26 September 1914 See also * Cathedral hull * Boston Whaler Boston Whaler is an American boat manufacturer. It is a subsidiary of the Brunswick Boat Group, a division of the Brunswick Corporation. Boston Whalers were originally produced in Massachusetts, hence the name, but today are manufactured in Edge ... * Supercavitation propeller References * Campbell, Lorne''Innovation in Small Craft Design - A Tribute'' The Royal Institute ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bureau Of Construction And Repair
The Bureau of Construction and Repair (BuC&R) was the part of the United States Navy which from 1862 to 1940 was responsible for supervising the design, construction, conversion, procurement, maintenance, and repair of ships and other craft for the Navy. The bureau also managed shipyards, repair facilities, laboratories, and shore stations. On 20 June 1940, Congress passed a law which consolidated the Bureau's functions with those of the Bureau of Engineering (BuEng), creating the Bureau of Ships (BuShips). History The Bureau was staffed by officers of the Construction Corps (called constructors) with advanced degrees in naval architecture. Six civilian constructors were hired by the Navy in 1794 to supervise construction of the frigates authorized by Congress that year.Snyder, Philip W., RADM USN "Bring Back the Corps" ''United States Naval Institute Proceedings'' February 1979 p.49 The Bureau of Construction, Equipment, and Repairs was established in 1842 as one of the five ori ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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