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The Heavy Expanded Mobility Tactical Truck (HEMTT) is an eight-wheel drive, diesel-powered, tactical truck used by the US military and others. In evolving configurations it has been in continuous production since 1982. The M977 HEMTT entered service with the U.S. Army as a replacement for the M520 Goer. By early 2015 more than 27,000 HEMTTs in various configurations had been produced by Oshkosh Defense through either new-build or re-manufactured.〔 Current variants have the A4 suffix. ==History== Following the evaluation of proposals submitted by AM General, MAN, Pacific Car & Foundry (PACCAR) and Oshkosh Truck Corporation, In May 1981, the then U.S. Army Tank Automotive Command awarded an initial five-year contract valued at US$251.13 million to Oshkosh Truck Corporation for production of the 10 ton (9,070 kg) 8 x 8 Heavy Expanded Mobility Tactical Truck (HEMTT).〔 The first prototype HEMTT was completed in December 1981, pre-production examples followed during March 1982, with the first production vehicles produced in September 1982. Over five contract years a total of 2,140 vehicles were to be delivered. Contract options allowed for up to an additional 5,351 HEMTTs to be ordered, bringing production totals to 7,490 vehicles. The bulk of these options were exercised.〔 The second HEMTT contract was awarded to Oshkosh Truck Corporation in April 1987. This contract called for a base quantity of 1,403 vehicles, with options for an additional 1,684 vehicles; all contract options were exercised. A supplemental agreement added a further 1,449 vehicles (plus an option for 363 vehicles) to the second HEMTT contract in April 1989; the contract option was exercised. The third HEMTT production contract was awarded mid-1994 and when deliveries under this concluded over 14,000 HEMTTS had been produced. The fourth HEMTT production contract was awarded in August 1995, this extending production through September 2001. The Family of Heavy Tactical Vehicles (FHTV) contract was awarded to Oshkosh by the U.S. Army in March 2001. In addition to the HEMTT (both new and re-manufacture), the contract covered the M1070 HET, M1074, and M1075 Palletized Load System (PLS) trucks, and M1076 PLS trailers and called for up to 5,398 trucks and 1,100 trailers (including options). FHTV covered the production period from March 2001 until mid-fiscal year 2006 (FY06). The FHTV contract was extended and renegotiated, and in February 2007, Oshkosh announced it had been awarded a contract to continue production of FHTVs. The follow-on FHTV contract (FHTV 2) covered new production of HEMTTs (including current A4 variants from mid-2008) and PLS vehicles plus PLS trailers.〔 In total, 2173 new-build HEMTT A4 and 104 Recap HEMTT A4 were ordered under FHTV 2.〔 Production of product-improved HEMTT A2s continued until production of the HEMTT A4 began in July 2008. The exception was the M1977 which initially remained at A2 configuration for fleet commonality reasons. There is now an M1977A4.〔 Oshkosh Defense announced In October 2008 that it had been awarded the FHTV 3 contract by the U.S. Army's TACOM. More than 6,000 vehicles and trailers could be delivered under this three-year contract. FHTV 3 covered the HEMTT A4 and A1 models of the PLS and HET, and both new and recapitalized (Recap) vehicles. HEMTT A4 models were required to be Long Term Armor Strategy (LTAS) compliant and came off the assembly line fitted with upgraded suspensions and integral composite (A-kit) armor, and ready to receive an add-on (B-kit) armor appliqué. The first FHTV 3 order was valued at US$1.2 billion and delivery commenced in November 2008. By late-2009 about 11,500 HEMTT A4s (new-build and Recap) had been ordered under the FHTV 2 and 3 contracts. Oshkosh Defense announced in 2012, that it had been awarded a bridge contract to continue production and support of the FHTV. In October 2013, the U.S. Army released a revised pre-solicitation notice associated with FHTV 4 (presented FHTV IV). The original synopsis had been released in July 2013. According to the October release, the government intends to award a five-year requirements contract with an estimated value of US$822 million on a sole source basis to Oshkosh Corporation. It is understood the aim of the U.S. Army, was to ensure negotiations with Oshkosh Defense for FHTV IV were concluded in time to ensure there was no break in production between FHTV 3 and FHTV IV production and deliveries.〔 On 19 June 2015 Oshkosh Defense announced the U.S. Army had awarded the company a five-year requirements contract worth a potential $780 million to Recapitalize (Recap) its Family of Heavy Tactical Vehicles (FHTV). The FHTV 4 contract covers an estimated 1,800 FHTVs and in addition to HEMTTs covers PLS trucks and also includes the production of approximately 1,000 new production PLS trailers. HEMTT models account for around 75 per cent of the Recap potential, and all work performed under the contract will be completed in Oshkosh, Wisconsin. Deliveries will run from 2015 to 2019. Since 1995, Oshkosh has worked with the US Army to restore in excess of 12,000 heavy vehicles.〔〔(【引用サイトリンク】title=Oshkosh Defense Awarded Contract to Recapitalize U.S. Army’s Heavy Tactical Vehicles )〕 To be Recapitalized, used vehicles are returned to Oshkosh where they are stripped to the frame rails, and then fully rebuilt to like-new condition. Recapitalized vehicles are assembled on the same production line as new vehicles, and put through the same performance tests and inspection procedures as new vehicles. The latest technology and safety upgrades are included in the process, and Recap'd vehicles are returned to the Army with a new bumper-to-bumper warranty.〔〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Heavy Expanded Mobility Tactical Truck」の詳細全文を読む スポンサード リンク
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