Military Transport Aircrafts

BOEING C-17  GLOBEMASTER III

Description:-

• Boeing C-17 Globe master III is a large military transport aircraft.
• It was developed by McDonnell Douglas from 1980's to early 1990's for United States Air Force(USAF).
• C-17 is named after the name of two previous piston-engined military cargo aircraft, the Douglas c-74 Globe master and Douglas c-124 Globe master II.
• C-17 performs the functions of transporting troops and cargo throughout the world, tactical airlift, medical evacuation and airdrop duties..
• Boeing merged with McDonnell Douglas continues to manufacture C-17's for export customers following the end of deliveries to U.S,Air Force. 
• The C-17 is operated by U.S.Air Force,Australia,Canada,United Arab Emirates,United Kingdom,Qatar, NATO Heavy Airlift Wing and India.
  

Background and Design phase:-

•  In 1970 the U.S.Airforce began looking for replacement for its Lockhead C-130 Hercules which is a tactical cargo aircraft.
• Advanced Medium STOL Transport(AMST) Competition was held between YC-14 proposed by Boeing and YC-15 proposed by McDonnell Douglas.
• Both entries exceeded specified requirements the AMST competition was cancelled before the selection of winner.
• The Air Force started the C-X program in November 1979 for developing larger AMST with longer range to augment its strategic airlift.
• The USAF needed increased strategic airlift capabilities to fulfill its airlift requirements.
• USAF set mission requirements and released a request for proposals(RFP) for C-X in October ,1980.
• Based on YC-15 McDonnell Douglas elected to develop a new air craft.
• Boeing bid an enlarged three-engine version of its AMST YC-14.
• Lockheed submitted two designs, a C-5 based design and an enlarged C-141 design.
• McDonnell Douglas was chosen to built its proposed aircraft and designated C-17 on 28 August 1981.C-17, new aircraft differs from YC-15 having increased size, swept wings and more powerful engines.
• C-17 performs the work done by C-141 and also fulfill some duties Lockheed C-5 Galaxy.
• Alternate proposals were made.
• The YC - 15 was trasferred to AMARC to be made worthy again under further flight test for the C-17 program in march 1997.
• Boeing proposed to cut the price of C-17 in the airforce brought for 60 more , and in august 2002 and the order was ordered to 180 aircrafts.

 

Design :

• The C-17 is performed by four pratt & whiteney F-117-PW-100 turbofan engines, which are based on the commercial used on the Boeing 757.
• And providing enogh reverse thrust to back the aircraft up on the ground while taxxing.
• The thrust reverse can also be used in flight at idle - reverse for added drag in maximum rate descents.
• The aircraft requires a crew of three (pilot, copilot and load master) for cargo operations .
• Cargo is loaded through a large aft ramp that accommodates rolling stock such as 69-ton M1 Abrams main battle tank.
• The cargo floor has rollers for pallatized cargo that can be flipped to provide a floor flat suitable for vehicles and other rolling stock.
• The C-17 is designed to operate from runways as short as 3,500ft as narrow as 90ft . 
• In addition it can be operated from unpaved , unimproved runways.
• The thrust reverse can be used to back the aircraft and reverse direction on narrow taxiways using a three or more turn points.
  

Operational history :

NATO(Strategic Airlift capability program ) :

• A number of NATO countries signed a letter of intent to purchase C-17's on 19th july 2006,
• In 2006 farnborugh Airshow to participate in the joint and operation within NATO.
• The present members are Bulgaria, Estonia , Hungary, Luthiana , the Netherlands, norway , poland, Romania, Slovania, U.S.
• As well as the partnership for peace countries Finland and Sweden.
• The heavy airlift was hosted by hungary.
• Which acts as the flag nation.

Qatar Emiri Airforce :

• It operates four C-17's .
• Boeing delivered first C-17 to qatar on 11 august 2009.
• And the second on 10 september 2009.
• A June 2013 article by the Newyork times states that qatar is using C-17's to ship the weapons from lybia to syrian via turkey, feeding syrain civil war.

Indian Airforce :

• The aircraft provides strategic airlift to deploy special forces in the event of national emergencies or terrorism.
• They are operated by the airforce at the terrain from himlayan air bases in north india at 13,000ft to indian ocean basis in south india .
• The skylords fly mission within the india to places like port blair, leh , thoise .
• They have been also sent on foriegn deployments.

Orders and deliveries :

International :

• During the summer 2008 it was reported that south korea has allocated funds for the purchase of three or four C-17 class for use in support in expeditionary experiments .
• In january 2010,india has requested 10 C- 17's through the US government Millitary sales programs and was approved by US congress in June 2010.

Deliveries 

1991: 1

1992: 4

1993: 5

1994: 8

1995: 6

1996 6

1997: 7

1998: 10

1999: 11

2000: 13

2001: 14

2002: 16

2003: 16

2004: 16

2005: 16 

2006: 16

2007: 16

2008: 16

2009: 16

2010: 14

2011: 12

2012: 10

2013: 4

Performance :

Cruise speed : mach 0.74(450 knots, 515 mph, 830 kmp/h).

Range : 2,420mmi (2785mi,4482km) ;5610nmi(10390km) with paratroophs.

Service ceiling : 45.000ft (13,716m).

max wing load 150lb/ft2(750 kg/m2).

minimum thrust : 0.277.

takeoff run at MTOW : 7,600ft .

landing distance : 3,500ft.

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