|
VXX, officially the Presidential Helicopter Replacement Program, is a procurement program to replace aging Marine One helicopters that transport the President of the United States. The current VH-3 helicopters have aging airframes, having entered service with United States Marine Corps ''Marine Helicopter Squadron One'' (HMX-1) in 1963. The VH-3D replaced the VH-3A by 1976.〔("VH-3D Sea King helicopter" ). US Navy, February 20, 2009.〕 The smaller VH-60N was ordered beginning in 1989. On 7 May 2014, it was announced that the Sikorsky S-92 had won the VXX competition. ==History== In 2002, it was proposed to replace the current helicopters. The U.S. Department of Defense issued a request for proposals (RFP) on December 18, 2003 for the supply of 23 helicopters to replace the eleven VH-3Ds and eight VH-60Ns of USMC HMX-1 squadron. This requirement was given the designation VXX (V being the prefix for VIP aircraft and XX representing the then unspecified numerical part of the designation). Both AgustaWestland and Sikorsky responded to the RFP. Sikorsky proposed the VH-92, a variant of the H-92 Superhawk. On January 28, 2005 the Department of Defense announced that it had selected the US101 for the VXX program. The US101 team was awarded a US$1.7 billion contract for the VXX system development and demonstration (SDD) phase.〔("Lockheed Martin to Build New Presidential Helicopter" ). U.S. Department of Defense January 28, 2005〕 The Lockheed Martin and AgustaWestland AW101-based US101 bid was given the military designation VH-71 Kestrel in mid-2005.〔("US101 (VH-71A) All Weather Medium Lift Military Helicopter, USA / Europe" ). Airforce-technology.com. Retrieved June 28, 2010.〕 The replacement cost of the fleet was estimated at $6.1 billion when the VH-71 contracts were signed in 2005. However, by March 2008 the cost of the new 28 helicopter fleet was projected to total US$11.2 billion, or roughly US$400 million per helicopter.〔〔("Executive Branch Strikes VH-71 Deal" ). Aerospace Daily and Defense Report, March 17, 2008.〕 Political controversy began in February 2009 amid calls for fiscal restraint, and, as a result, President Barack Obama announced that he had instructed Defense Secretary Robert Gates to review the helicopter situation and on 6 April 2009, Gates announced the ending of VH-71 funding, after nine aircraft had already been built at a cost of about US$600 million each.〔 In February 2010, the U.S. Navy issued a request for information (RFI) to the aviation industry. Responses would be used to restart the VXX contest.〔 In April 2010, Sikorsky and Lockheed Martin announced they would team in offering the VH-92.〔("Sikorsky and Lockheed Martin Announce Teaming Agreement to Compete for the VXX Presidential Helicopter Program" ). Lockheed Martin〕〔Cavas, Christopher P. ("Former Competitors Join Forces for Helo Program" ). ''Defense News'', April 19, 2010.〕 In June, Boeing announced it was considering a licensed version of the AgustaWestland AW101, on which the VH-71 was based, to be built in the United States. Boeing was also considering the Bell-Boeing V-22 Osprey and Boeing CH-47 Chinook for the presidential VXX program.〔Fein, Geoff. "Bell-Boeing V-22 Latest Entry For Navy's Presidential Helo RFI". ''Defense Daily'', April 21, 2010. (subscription article ).〕 Whichever platform were picked would be expected to be delivered between 2017 and 2023. On November 23, 2012, Naval Air Systems Command released a draft request for proposals for a new VXX program.〔("New-U-S-Presidential-Helicopter-Program-Kicks-Off" ). Cavas, Christopher P., Defense News, 23 November 2012.〕 The new requirements lowered the number of people the helicopter had to carry, shortened its range, and simplified its communications. By mid-2013, Boeing, Bell Helicopter and AgustaWestland declined to take part in the project. Only Sikorsky seemed likely to bid on the VXX contract.〔Drew, Christopher. "Few Suitors to Build a New Marine One". ''The New York Times'', 29 July 2013.〕 On 7 May 2014, the Navy announced that the Sikorsky S-92 had won the VXX competition, ahead of other potential competitors who decided not to submit a proposal.〔 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「VXX」の詳細全文を読む スポンサード リンク
|