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ARH-70
The Bell ARH-70 Arapaho was an American four-bladed, single-engine, light military helicopter designed for the United States Army's Armed Reconnaissance Helicopter (ARH) program. With a crew of two and optimized for urban combat, the ARH-70 was slated to replace the Army's aging OH-58D Kiowa Warrior. Excessive delays and growth in program costs forced its cancellation on 16 October 2008, when the Department of Defense failed to certify the program to Congress. The ARH-70 was touted as having been built with off-the-shelf technology, the airframe being based on the Bell 407. Development Background and Armed Reconnaissance Helicopter competition The RAH-66 Comanche helicopter program was canceled by the U.S. Army on 23 February 2004. The cancellation was a result of a six-month study which recommended canceling the program before the Comanche reached production, after 20 years and development costs of over US$6.9 billion. The study estimated that the Army would save US$14 bill ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RAH-70
The Bell ARH-70 Arapaho was an American four-bladed, single-engine, light military helicopter designed for the United States Army's Armed Reconnaissance Helicopter (ARH) program. With a crew of two and optimized for urban combat, the ARH-70 was slated to replace the Army's aging OH-58D Kiowa Warrior. Excessive delays and growth in program costs forced its cancellation on 16 October 2008, when the Department of Defense failed to certify the program to Congress. The ARH-70 was touted as having been built with off-the-shelf technology, the airframe being based on the Bell 407. Development Background and Armed Reconnaissance Helicopter competition The RAH-66 Comanche helicopter program was canceled by the U.S. Army on 23 February 2004. The cancellation was a result of a six-month study which recommended canceling the program before the Comanche reached production, after 20 years and development costs of over US$6.9 billion. The study estimated that the Army would save US$14 billio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bell 407
The Bell 407 is a four-blade, single-engine, civil utility helicopter. A derivative of the Bell 206L-4 LongRanger, the 407 uses the four-blade, soft-in-plane design rotor with composite hub developed for the United States Army's OH-58D Kiowa Warrior instead of the two-blade, semi-rigid, teetering rotor of the 206L-4. Design and development In 1993, Bell began the development of the New Light Aircraft as a replacement for its Model 206 series. The program resulted in the 407, a development of Bell's LongRanger.Frawley, Gerard. ''The International Directory of Civil Aircraft, 2003-2004'', p. 47. Aerospace Publications Pty Ltd, 2003. . A 206L-3 LongRanger was modified to serve as the 407 demonstrator. The demonstrator used hardware for the 407 and added molded fairings to represent the 407's wider fuselage then under development. The demonstrator was first flown on April 21, 1994, and the 407 program was publicly announced at the Heli-Expo in Las Vegas, Nevada, in January 199 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Honeywell HTS900
The Honeywell HTS900 is an American turboshaft engine produced by Honeywell Aerospace. A growth version of the LTS101 which it is designed to replace, the HTS900 is in the 1,000 shp (745 kW) class. At the October 2018 NBAA convention, it was shown with two electric generators for hybrid electric aircraft, and it can be developed up to , targeting a conversion efficiency of 98%. Applications * Bell ARH-70 Arapaho * Kopter SH09 (Marenco SwissHelicopter SKYe SH09) * XTI TriFan 600 Specifications (HTS900) * Control system: FADEC A full authority digital engine (or electronics) control (FADEC) is a system consisting of a digital computer, called an "electronic engine controller" (EEC) or "engine control unit" (ECU), and its related accessories that control all aspects of ai ...: dual channel ECU + electromechanical backup See also References External links Honeywell HTS900 page* * {{aeroengine-specs HTS900 2000s turboshaft engines ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bell OH-58 Kiowa
The Bell OH-58 Kiowa is a family of single-engine single- rotor military helicopters used for observation, utility, and direct fire support. It was produced by the American manufacturer Bell Helicopter and is closely related to the Model 206A JetRanger civilian helicopter. The OH-58 was originally developed during the early 1960s as the ''D-250'' for the Light Observation Helicopter (LOH). While the rival Hughes OH-6 Cayuse was picked over Bell's submission in May 1965, the company refined its design to create the Model 206A, a variant of which it successfully submitted to the reopened LOH competition two years later. The initial model, designated by the service as the ''OH-58A'', was introduced in May 1969. Successive models would follow, often with uprated engines, enhanced protection systems, and other improvements, cumulating in the ''OH-58F''. Additional improvements, such as the ''OH-58X'', were proposed but ultimately not pursued. During the 1970s, the US Army became ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
OH-58 Kiowa
The Bell OH-58 Kiowa is a family of single-engine single-rotor military helicopters used for observation, utility, and direct fire support. It was produced by the American manufacturer Bell Helicopter and is closely related to the Model 206A JetRanger civilian helicopter. The OH-58 was originally developed during the early 1960s as the ''D-250'' for the Light Observation Helicopter (LOH). While the rival Hughes OH-6 Cayuse was picked over Bell's submission in May 1965, the company refined its design to create the Model 206A, a variant of which it successfully submitted to the reopened LOH competition two years later. The initial model, designated by the service as the ''OH-58A'', was introduced in May 1969. Successive models would follow, often with uprated engines, enhanced protection systems, and other improvements, cumulating in the ''OH-58F''. Additional improvements, such as the ''OH-58X'', were proposed but ultimately not pursued. During the 1970s, the US Army became i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MH-6 Little Bird
The Boeing MH-6M Little Bird (nicknamed the Killer Egg) and its attack variant, the AH-6, are light helicopters used for special operations in the United States Army. Originally based on a modified OH-6A, it was later based on the MD 500E, with a single five-bladed main rotor. The newest version, the MH-6M, is based on the MD 530F and has a single, six-bladed main rotor and four-bladed tail rotor. Development The OH-6 was started in 1960, when the U.S. Army issued Technical Specification 153 for a Light Observation Helicopter (LOH) that could perform personnel transport, escort and attack missions, casualty evacuation, and observation. Twelve companies took part in the competition and Hughes Tool Company's Aircraft Division submitted the Model 369. Two designs, those submitted by Fairchild-Hiller and Bell, were selected as finalists by the Army-Navy design competition board, but the Army later included the helicopter from Hughes as well. The first Model 369 prototype fle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MD Helicopters MH-6 Little Bird
The Boeing MH-6M Little Bird (nicknamed the Killer Egg) and its attack variant, the AH-6, are light helicopters used for special operations in the United States Army. Originally based on a modified OH-6A, it was later based on the MD 500E, with a single five-bladed main rotor. The newest version, the MH-6M, is based on the MD 530F and has a single, six-bladed main rotor and four-bladed tail rotor. Development The OH-6 was started in 1960, when the U.S. Army issued Technical Specification 153 for a Light Observation Helicopter (LOH) that could perform personnel transport, escort and attack missions, casualty evacuation, and observation. Twelve companies took part in the competition and Hughes Tool Company's Aircraft Division submitted the Model 369. Two designs, those submitted by Fairchild-Hiller and Bell, were selected as finalists by the Army-Navy design competition board, but the Army later included the helicopter from Hughes as well. The first Model 369 prototype ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bell Helicopter
Bell Textron Inc. is an American aerospace manufacturer headquartered in Fort Worth, Texas. A subsidiary of Textron, Bell manufactures military rotorcraft at facilities in Fort Worth, and Amarillo, Texas, as well as commercial helicopters in Mirabel, Quebec, Canada. History Bell Aircraft The company was founded on July 10, 1935, as Bell Aircraft Corporation by Lawrence Dale Bell in Buffalo, New York. The company focused on the designing and building of fighter aircraft. Their first fighters were the XFM-1 Airacuda, a twin-engine fighter for attacking bombers, and the P-39 Airacobra. The P-59 Airacomet, the first American jet fighter, the P-63 Kingcobra, the successor to the P-39, and the Bell X-1 were also Bell products.History of Bell Helicopter . bellhelicopter.com [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Military Helicopter
A military helicopter is a helicopter that is either specifically built or converted for use by military forces. A military helicopter's mission is a function of its design or conversion. The most common use of military helicopters is transport of troops, but transport helicopters can be modified or converted to perform other missions such as combat search and rescue (CSAR), medical evacuation (MEDEVAC), airborne command post, or even armed with weapons for attacking ground targets. Specialized military helicopters are intended to conduct specific missions. Examples of specialized military helicopters are attack helicopters, observation helicopters and anti-submarine warfare helicopters. Types and roles Military helicopters play an integral part in the sea, land and air operations of modern militaries. Generally manufacturers will develop airframes in different weight/size classes which can be adapted to different roles through the installation of mission specific equipmen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GAU-19
The GAU-19/A (GECAL 50) is an electrically driven, three-barrel rotary heavy machine gun that fires the .50 BMG (12.7×99mm) cartridge. Technical specifications The GAU-19/A is designed to accept standard NATO .50 caliber M9-linked ammunition. The rate of fire is selectable to be either 1,000 or 2,000 rounds per minute. The Humvee armament kit version fires at 1,300 rounds per minute. The average recoil force when firing is 1.7 kN, 2.2 kN or 2.8 kN depending on firing rate. In January 2012, General Dynamics announced they would be delivering a new version designated GAU-19/B. It provides the same firepower in a lighter platform, weighing and optimized for a firing rate of 1,300 rounds per minute and an average recoil force of 2.5 kN.GD delivers GAU-19/B - General Dynamics Both variants can be c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Textron
Textron Inc. is an American industrial conglomerate based in Providence, Rhode Island. Textron's subsidiaries include Arctic Cat, Bell Textron, Textron Aviation (which itself includes the Beechcraft, and Cessna brands), and Lycoming Engines. It was founded by Royal Little in 1923 as the Special Yarns Company. In 2020, Textron employed over 33,000 people in 25 different countries. The company ranked 265th on the 2021 ''Fortune'' 500 of the largest United States corporations by revenue. History Early history Textron started as a textile company in 1923, when 27-year-old Royal Little founded the Special Yarns Corporation in Boston, Massachusetts. The company manufactured synthetic yarns, a niche product at the time. By the start of World War II, the company was known as Atlantic Rayon Corporation and manufactured parachutes. As war production wound down, the company started making civilian products as well and was renamed Textron: “Tex" for "textiles" and "tron ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nunn–McCurdy Amendment
The Nunn–McCurdy Amendment or Nunn–McCurdy Provision, introduced by Senator Sam Nunn and Congressman Dave McCurdy in the United States 1982 Defense Authorization Act and made permanent in 1983, is designed to curtail cost growth in American weapons procurement programs. It requires notification to the United States Congress if the cost per unit goes more than 25% beyond what was originally estimated and calls for the termination of programs with total cost growth greater than 50%, unless the Secretary of Defense submits a detailed explanation certifying: # the program is essential to national security, that no suitable alternative of lesser cost is available; # new estimates of total program costs are reasonable; and # management structure is (or has been made) adequate to control costs. Congress normally regards the explanations from the Secretary of Defense as acceptable. It is unusual for a program to be cancelled as a result of notification, but it has led to many chan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
