Editing Boeing CH-47 Chinook (section)

==Variants==
There have been many versions of the Chinook over the decades, there are variants that involve major upgrades such as engines and avionics, ones for certain tasks, such as Special Operation missions, and finally there are version for certain countries, such as the J model built by and for Japan.

===HC-1B===
The pre-1962 designation for Model 114 development aircraft that would be redesignated CH-47 Chinook.<ref>{{Cite web|title=CH-47 Chinook - Military Aircraft|url=https://fas.org/man/dod-101/sys/ac/h-47.htm|access-date=2021-06-19|website=fas.org}}</ref>

===CH-47A===
The all-weather, medium-lift CH-47A Chinook was powered initially by [[Lycoming T55]]-L-5 engines rated at {{convert|2200|hp|kW|sigfig=3|lk=in}}, which were replaced by the T55-L-7 rated at {{convert|2650|hp|kW|sigfig=3|abbr=on}} engines or T55-L-7C engines rated at {{convert|2850|hp|kW|sigfig=3|abbr=on}}. The CH-47A had a maximum gross weight of {{convert|33000|lb|abbr=on}}, with a maximum payload about {{convert|10000|lb|abbr=on}}<ref>{{cite web |url=http://www.airforceworld.com/heli/eng/ch47.htm |title=US ARMY CH-47 Chinook Helicopter |access-date=13 November 2014 |archive-url=https://web.archive.org/web/20141028183458/http://airforceworld.com/heli/eng/ch47.htm |archive-date=28 October 2014 |url-status=dead}}</ref> Delivery of the CH-47A Chinook to the U.S. Army began in August 1962. A total of 354 were built.<ref>{{cite web|title=BOEING CH-47D CHINOOK 83-24104 MUSEUM ACCESSION NUMBER X004-1310|date=2012|first=Andrew|last=Simpson|url=https://www.rafmuseum.org.uk/documents/collections/X004-1310-CH-47D-Chinook-83-24104.pdf |archive-url=https://ghostarchive.org/archive/20221009/https://www.rafmuseum.org.uk/documents/collections/X004-1310-CH-47D-Chinook-83-24104.pdf |archive-date=2022-10-09 |url-status=live|publisher=[[Royal Air Force Museum London]]|access-date=2021-12-20}}</ref>

===ACH-47A===
[[File:Armament on ACH-47A "Birth Control" at Vung Tau Air Base.jpg|thumb|XM34 armament system on ACH-47A "Birth Control" at [[Vung Tau Air Base]] ]]

The ACH-47A was known as the Armed/Armored CH-47A (or A/ACH-47A) before being designated ACH-47A<ref>Wayne Mutza, ''Helicopter Gunships: Deadly Combat Weapon Systems'' (Specialty Press, 2010) p52</ref> as a U.S. Army Attack Cargo Helicopter, and unofficially referred to as ''Guns A Go-Go''. Four CH-47A helicopters were converted to gunships by Boeing Vertol in late 1965. Three were assigned to the 53rd Aviation Detachment in South Vietnam for testing, with the remaining one retained in the U.S. for weapons testing. By 1966, the 53rd was redesignated the 1st Aviation Detachment (Provisional) and attached to the 228th Assault Support Helicopter Battalion of the 1st Cavalry Division (Airmobile). By 1968, only one gunship remained, and transport demands prevented more conversions. It was returned to the United States, and the program stopped.<ref>{{cite web |url=http://www.armyaviationmuseum.org/ach-47a-guns-a-go-go/ |title=ACH-47A Guns-a-go-go |date=8 November 2016 |publisher=[[United States Army Aviation Museum]] |access-date=2021-12-20}}</ref>

The ACH-47A carried five 7.62 × 51&nbsp;mm [[M60 machine gun#M60D|M60D machine guns]] or .50-caliber (12.7&nbsp;mm) [[M2 Browning|M2HB heavy machine guns]], provided by the [[US Helicopter Armament Subsystems#CH-47 Chinook and ACH-47A .22Guns-a-GoGo.22|XM32]] and [[US Helicopter Armament Subsystems#CH-47 Chinook and ACH-47A .22Guns-a-GoGo.22|XM33]] armament subsystems, two 20&nbsp;mm [[Hispano-Suiza HS.404|M24A1 cannons]], two 19-tube {{convert|2.75|in|adj=on}} [[Folding-Fin Aerial Rocket|Folding Fin Aerial Rocket]] launchers (XM159B/XM159) or sometimes two [[U.S. aircraft gun pods#Descriptions of models|M18/M18A1]] 7.62 × 51&nbsp;mm [[gun pod]]s, and a single 40&nbsp;mm [[M75 grenade launcher]] in the [[US Helicopter Armament Subsystems#UH-1 Iroquois|XM5/M5]] armament subsystem (more commonly seen on the UH-1 series of helicopters). Rare newsreel footage shows one of the aircraft in action supporting the 8th Cavalry Regiment during an ambush at Bông Son, South Vietnam.<ref>{{Cite web|title=Newsreel Footage - Ambush at Bông San|website = [[YouTube]]|url=https://m.youtube.com/watch?v=Dz4RiBMTRKw |archive-url=https://ghostarchive.org/varchive/youtube/20211211/Dz4RiBMTRKw| archive-date=2021-12-11 |url-status=live}}{{cbignore}}</ref> The surviving aircraft, ''Easy Money'', has been restored and is on display at [[Redstone Arsenal]], Alabama.<ref>[http://www.chinook-helicopter.com/chinook/gunsagogo.html Guns a Go-Go] {{Webarchive |url=https://web.archive.org/web/20070514120610/http://www.chinook-helicopter.com/chinook/gunsagogo.html |date=14 May 2007}}. chinook-helicopter.com</ref><ref>{{cite web|url=https://www.armyaviationmuseum.org/ach-47a-guns-a-go-go/|title=Guns a Go-go|date=8 November 2016 |publisher=United States Army Aviation Museum |access-date=12 July 2022}}</ref>

===CH-47B===
[[File:CH-47B (USA 66-19138 NASA 737).jpg|left|thumb|NASA CH-47B]]
The CH-47B was an interim upgrade while Boeing worked on a more substantially improved CH-47C. The CH-47B was powered by two Lycoming T55-L-7C {{convert|2,850|hp|kW|abbr=on}} engines. It had a blunted rear rotor pylon, redesigned asymmetrical rotor blades, and strakes along the rear ramp and fuselage to improve flying characteristics. It could be equipped with two door-mounted M60D [[7.62×51mm NATO|7.62 mm NATO]] [[machine gun]]s on the M24 armament subsystem and a ramp-mounted M60D using the M41 armament subsystem. Some CH-47 "bombers" were equipped to drop [[tear gas]] or [[napalm]] from the rear cargo ramp onto [[Viet Cong]] bunkers. The CH-47B could be equipped with a hoist and cargo hook. The Chinook proved especially valuable in "Pipe Smoke" aircraft recovery missions. The "Hook" recovered about 12,000 aircraft valued at over $3.6&nbsp;billion during the war; 108 were built.{{citation needed|date=January 2021}}

===CH-47C===
[[File:Italian Army Boeing (Elicotteri Meridionali) CH-47C Chinook (219) Bidini-1.jpg|thumb|CH-47C of the [[Italian Army]]]]

The CH-47C featured more powerful engines and transmissions.<ref name="vector_Army_CH-47">{{usurped|1=[https://web.archive.org/web/20120623191825/http://www.vectorsite.net/avch47.html#m4 US Army CH-47A / CH-47B / CH-47C / CH-47D / SOA Chinooks]}}. Vectorsite.net, 1 July 2004.</ref> Three sub-versions were built, the first with Lycoming T55-L-7C engines delivering {{convert|2850|shp|abbr=on}}. The "Super C" had Lycoming T55-L-11 engines delivering {{convert|3750|shp|abbr=on}}, an upgraded maximum gross weight of {{convert|46000|lb|abbr=on}}, and pitch stability augmentation. The T55-L-11 engines were less reliable, as they had been hurriedly introduced to increase payload; thus, they were temporarily replaced by the more reliable Lycoming T55-L-7C. The Super C was distinguishable from the standard "C" by the uprated maximum gross weight.

The type was not approved by the FAA for civil aviation due to the nonredundant hydraulic flight boost system drive. The hydraulic system was redesigned for the succeeding CH-47D, allowing it to achieve certification as the Boeing Model 234. A total of 233 CH-47Cs were built. Canada bought eight CH-47Cs; deliveries of the type began in 1974. Receiving the Canadian designation "CH-147", these were fitted with a power hoist above the crew door; other changes included a flight engineer station in the rear cabin: operators referred to the configuration as the "Super C".<ref>{{Cite book |publisher= Casemate |isbn= 9781612002767 |last= Curtis |first= Robert F. |title= Surprised at Being Alive: An Accidental Helicopter Pilot in Vietnam and Beyond |date= 30 December 2014 |url=https://books.google.com/books?id=oUquBQAAQBAJ&pg=PA58 |page=58}}</ref> The CH-47C was used widely during the Vietnam War, eventually replacing the older [[Piasecki H-21|Piasecki H-21 Shawnee]] in the combat assault support role.{{citation needed|date=January 2021}}

===CH-47D===
[[File:Boeing CH-47D Chinook Royal Dutch Army photo-6.JPG|thumb|left|CH-47D cockpit]]

The CH-47D shares the same airframe as earlier models, with more powerful engines. Early CH-47Ds were powered by two T55-L-712 engines. The most common engine is the later T55-GA-714A. With its triple-hook cargo system, the CH-47D can carry heavy payloads internally and up to {{convert|26000|lb|kg|abbr=on}} (such as {{convert|40|ft|m|adj=on|disp=or|sp=us}} containers) externally. It was introduced into service in 1979. In air assault operations, it often serves as the principal mover of the 155&nbsp;mm [[M198 howitzer]], plus 30 rounds of ammunition, and an 11-man crew. The CH-47D has advanced avionics, including [[Global Positioning System]]. Nearly all US Army CH-47Ds were converted from previous A, B, and C models, a total of 472 being converted. The last U.S. Army CH-47D built was delivered to the [[U.S. Army Reserve]], located at [[Fort Hood, Texas]], in 2002.<ref>[http://www.chinook-helicopter.com/history/CH-47D_Model_History.html Boeing CH-47D model Chinook helicopters] {{Webarchive |url=https://web.archive.org/web/20080803032657/http://www.chinook-helicopter.com/history/CH-47D_Model_History.html |date=3 August 2008}}. chinook-helicopter.com</ref>

[[File:160418-N-KW492-272 (26029374493).jpg|thumb|CH-47D of the [[Spanish Army]] taking off from the {{USS|Kearsarge|LHD-3|6}}, 2016]]
In 1993, the Netherlands signed an agreement with Canada to acquire seven CH-147Cs that were no longer in use with the [[Royal Canadian Air Force|RCAF]]. These airframes where upgraded by Boeing to CH-47D standard and delivery took place between August 1995 and February 1996. Six more new CH-47Ds were delivered by Boeing in 1998 for a total of 13,<ref>{{Cite web |title=Service history of the Boeing CH-47 Chinook with the RNLAF |url=http://www.karo-aviation.nl/photo/RNLAF/pages/CH-47%20rnlaf.htm |access-date=13 February 2025 |website=karo-aviation.nl}}</ref> of which two where lost in 2005 while on duty in Afghanistan. The Dutch CH-47Ds are improved over U.S. Army CH-47Ds, including a long nose for a Bendix weather radar, a "[[glass cockpit]]", and improved T55-L-714 engines. Between 2015 and 2023, the Netherlands replaced all 11 remaining CH-47Ds with 14 newly built CH-47Fs. The six CH-47Fs that where already in service have been upgraded to the same "MYII CAAS" standard as the newly built helicopters.<ref name="defensie2">{{Cite web |date= |title=Chinook-transporthelikopter |url=https://www.defensie.nl/onderwerpen/materieel/vliegtuigen-en-helikopters/boeing-ch-47f-chinook-transporthelikopter |access-date=13 February 2025 |website=defensie.nl}}</ref>

As of 2011, Singapore has 18 CH-47D/SDs, which includes twelve "Super D" Chinooks, in service.<ref name="AFM284">{{cite journal |first=Jerry |last=Gunner |date=November 2011 |title=Chinook at 50 - World Wokka Operators - Republic of Singapore Air Force |journal=[[AirForces Monthly]] |volume=284 |page=88 |issn=0955-7091}}</ref>

In 2008, Canada purchased 6 CH-47Ds from the U.S. for the Canadian Helicopter Force Afghanistan for $252&nbsp;million.<ref>[http://www.forces.gc.ca/site/pri/2/pro-pro/Afghanistan-eng.asp Equipment Procurement – Afghanistan Air Capabilities] {{webarchive |url=https://web.archive.org/web/20090629055408/http://www.forces.gc.ca/site/pri/2/pro-pro/Afghanistan-eng.asp |date=29 June 2009}} forces.gc.ca.</ref><ref>[http://www.canadianally.com/ca/2009-01-24-eng.asp Chinooks make their debut in Afghanistan] {{webarchive |url=https://web.archive.org/web/20101031072133/http://www.canadianally.com/ca/2009-01-24-eng.asp |date=31 October 2010}} canadianally.com</ref> With 1 CH-47D lost to an accident,<ref>{{Cite news |last=Perkel |first=Colin |title=Probe of 2011 Canadian military chopper crash in Afghanistan still ongoing |access-date=22 August 2018 |date=29 September 2014 |url=https://www.theglobeandmail.com/news/national/probe-of-2011-canadian-military-chopper-crash-in-afghanistan-still-ongoing/article20819678/ |archive-url=https://web.archive.org/web/20150424225432/http://www.theglobeandmail.com/news/national/probe-of-2011-canadian-military-chopper-crash-in-afghanistan-still-ongoing/article20819678/ |archive-date=24 April 2015 |url-status=live}}</ref> the remaining five were sold in 2011 after the end of Canada's Afghanistan mission and replaced with seven CH-147Fs.<ref>{{cite news |last1=Van Westerhoven |first1=Leo |title=Canada receives first CH-147F Chinook |url=https://www.dutchdefencepress.com/canada-receives-first-ch-147f-chinook/ |access-date=22 August 2018 |work=Dutch Free Press |date=6 May 2014 |archive-url=https://web.archive.org/web/20180822051213/https://www.dutchdefencepress.com/canada-receives-first-ch-147f-chinook/ |archive-date=22 August 2018 |url-status=dead}}</ref>

The U.S. Army is surplusing many of its CH-47Ds for use in FAA restricted category.{{citation needed|date=July 2024}}

===MH-47D===
The MH-47D was developed for [[special forces]] operations and has inflight refueling capability, a [[fast rope]]-rappelling system, and other upgrades. The MH-47D was used by U.S. Army [[160th Special Operations Aviation Regiment (United States)|160th Special Operations Aviation Regiment]]. Twelve MH-47D helicopters were produced. Six were converted from CH-47As and six were converted from CH-47C models.<ref>[http://www.chinook-helicopter.com/history/MH-47D_Model_History.html Boeing MH-47D model Chinook helicopters] {{Webarchive |url=https://web.archive.org/web/20080517103008/http://www.chinook-helicopter.com/history/MH-47D_Model_History.html |date=17 May 2008}}. chinook-helicopter.com</ref>

===MH-47E===
[[File:MH-47E Chinook lands on the flight deck of the USS Kearsarge.jpg|thumb|left|A [[United States Army|US Army]] MH-47E Chinook with in-flight refuelling probe lands aboard {{USS|Kearsarge|LHD-3|6}}.]]

The MH-47E has been used by U.S. Army Special Operations. Beginning with the E-model prototype manufactured in 1991, a total of 26 Special Operations Aircraft were produced. All aircraft were assigned to 2–160th SOAR(A) "Nightstalkers", home based at [[Fort Campbell, Kentucky]]. E models were converted from CH-47C airframes. The MH-47E has similar capabilities as the MH-47D, but with increased fuel capacity similar to the CH-47SD and terrain following/terrain avoidance radar.<ref>[http://www.chinook-helicopter.com/history/MH-47E_Model_History.html Boeing MH-47E model Chinook helicopters] {{Webarchive |url=https://web.archive.org/web/20080928092813/http://www.chinook-helicopter.com/history/MH-47E_Model_History.html |date=28 September 2008}}. chinook-helicopter.com</ref>

In 1995, the [[Royal Air Force]] ordered eight [[Boeing Chinook (UK variants)#Chinook HC3|Chinook HC3s]], effectively a lower cost MH-47E for special operations. They were delivered in 2001, but never became operational due to technical issues with their [[avionics]] fit, unique to the HC3. In 2008, work started to revert the HC3s to HC2 standard, to enable them to enter service.<ref>{{cite web |url=http://www.flightglobal.com/articles/2008/06/06/224470/uk-starts-chinook-hc3-reversion-work-amid-criticism.html |title=UK starts Chinook HC3 'reversion' work, amid criticism |last=Hoyle |first=Craig |date=6 June 2008 |work=[[Flight International]] |access-date=19 January 2009 |archive-url=https://web.archive.org/web/20090714012616/http://www.flightglobal.com/articles/2008/06/06/224470/uk-starts-chinook-hc3-reversion-work-amid-criticism.html |archive-date=14 July 2009 |url-status=live}}</ref> {{as of|2017}} they were upgraded to HC5 standard with a digital automated flight control system.<ref>{{cite web |first=Dominic |last=Perry |url=https://www.flightglobal.com/helicopters/pictures-raf-welcomes-updated-chinook-hc5/123525.article |title=RAF welcomes updated Chinook HC5 |date=30 March 2017 |website=Flight Global}}</ref>

===CH-47F===
[[File:A U.S. Army CH-47F Chinook helicopter, with the 1st Battalion, 171st Aviation Regiment, Hawaii Army National Guard, carries infantrymen, with 1st Battalion, 114th Infantry Regiment, New Jersey Army National 120810-Z-KC506-117.jpg|thumb|right|CH-47F during the exercise [[Southern Accord 2012]]]]

In 2001, the CH-47F, an upgraded CH-47D, made its maiden flight. The first production model rolled out at Boeing's facility in [[Ridley Park, Pennsylvania]], and first flew on 23 October 2006.<ref>"New Boeing CH-47F takes flight", ''Aerotech News and Review'', 3 November 2006, p. 3.</ref> Upgrades included {{convert|4868|shp|lk=in|adj=on}} Honeywell engines and airframe with better integrated construction for lower maintenance requirements.<ref name="Boe_new_CH-47F">{{cite press release |url=http://boeing.mediaroom.com/2007-02-19-Boeings-New-CH-47F-Chinook-Helicopter-Begins-Operational-Test-Flights-with-U.S.-Army |title=Chinook Helicopter Begins Operational Test Flights with US Army |access-date=1 April 2015 |publisher=Boeing |date=19 February 2007 |archive-url=https://web.archive.org/web/20150402120933/http://boeing.mediaroom.com/2007-02-19-Boeings-New-CH-47F-Chinook-Helicopter-Begins-Operational-Test-Flights-with-U.S.-Army |archive-date=2 April 2015 |url-status=live}}</ref> The milled construction reduces vibration, as well as inspection and repair needs, and eliminates flexing points to increase service life.<ref>Holcomb, Henry. [http://www.philly.com/inquirer/breaking/business_breaking/20070817_FORT_CAMPBELL__Ky__-_It_was_104_degrees_on_the_Tarmac_alongside_the_big_helicopter_.html "New Look Chinook"]. ''The Philadelphia Inquirer'', 17 August 2007. [https://web.archive.org/web/20071228212017/http://www.philly.com/inquirer/breaking/business_breaking/20070817_FORT_CAMPBELL__Ky__-_It_was_104_degrees_on_the_Tarmac_alongside_the_big_helicopter_.html archive link]</ref> The CH-47F can fly at speeds of over {{convert|175|mi/h|km/h|abbr=on}} with a payload of more than {{convert|21000|lb|kg|abbr=on}}.<ref name="Boe_CH-47F_191">{{cite press release |url=http://boeing.mediaroom.com/2008-08-26-Boeing-Awarded-US-Army-Contract-for-191-CH-47F-Chinook-Helicopters |title=Boeing Awarded US Army Contract for 191 CH-47F Chinook Helicopters |access-date=1 April 2015 |date=26 August 2008 |archive-url=https://web.archive.org/web/20150402171010/http://boeing.mediaroom.com/2008-08-26-Boeing-Awarded-US-Army-Contract-for-191-CH-47F-Chinook-Helicopters |archive-date=2 April 2015 |url-status=live}}</ref> New avionics include a [[Rockwell Collins]] Common Avionics Architecture System (CAAS) cockpit, and [[BAE Systems]]' Digital Advanced Flight Control System (DAFCS).<ref name="Boe_new_CH-47F"/> [[AgustaWestland]] assembles the CH-47F under license, known as the Chinook ICH-47F, for several customers.<ref>[http://www.agustawestland.com/product/chinook-ich-47f-0 "Chinook ICH-47F."] ''AgustaWestland'', Retrieved 4 July 2013. {{webarchive |url=https://web.archive.org/web/20141106042942/http://www.agustawestland.com/product/chinook-ich-47f-0 |date=6 November 2014}}</ref> Boeing delivered 48 CH-47Fs to the U.S. Army through August 2008; at that time Boeing announced a $4.8&nbsp;billion (~${{Format price|{{Inflation|index=US-GDP|value=4800000000|start_year=2008}}}} in {{Inflation/year|US-GDP}}) contract with the Army for 191 Chinooks.<ref name="Boe_CH-47F_191"/>

[[File:CH-147F Chinook -17 (modified).jpg|thumb|left|A Canadian CH-147F at [[RIAT]] 2017 <!-- The Canadian designation is 147 not 47 -->]]
A CH-47F Block 2 is being implemented {{as of|2020|lc=y}}. The Block 2 aims for a payload of {{convert|22000|lb|kg|abbr=on}} with {{convert|4000|ft|m|abbr=on}} and {{convert|95|°F|°C|abbr=on}} high and hot hover performance, eventually increased up to {{convert|6000|ft|m|abbr=on}}, to carry the [[Joint Light Tactical Vehicle]]; maximum takeoff weight would be raised to {{convert|54000|lb|kg|abbr=on|sigfig=3}}. It has 20% more powerful [[Lycoming T55|Honeywell T55-715]] engines along with an active parallel actuator system (APAS) to enhance the digital advanced flight-control system, providing an exact torque split between the rotors for greater efficiency. A new fuel system combines the three fuel cells in each sponson into one larger fuel cell and eliminates intracell fuel transfer hardware, reducing weight by {{convert|90|kg|lb|abbr=on}} and increasing fuel capacity. Electrical capacity is increased by three 60&nbsp;kVA generators.<ref>{{cite web |last1=Warwick |first1=Graham |url=http://www.military.com/daily-news/2013/04/22/block-2-ch47f-to-tackle-payload-shortfalls.html |title=Block 2 CH-47F to Tackle Payload Shortfalls |publisher=Aviation Week's Defense Technology International edition |access-date=1 April 2015 |via=Military.com |date=22 April 2013 |archive-url=https://web.archive.org/web/20150723221657/http://www.military.com/daily-news/2013/04/22/block-2-ch47f-to-tackle-payload-shortfalls.html |archive-date=23 July 2015 |url-status=live}} ([http://aviationweek.com/awin/block-2-ch-47f-tackle-payload-shortfalls Original story] {{Webarchive |url=https://web.archive.org/web/20150403051203/http://aviationweek.com/awin/block-2-ch-47f-tackle-payload-shortfalls |date=3 April 2015}} Aviation Week )</ref><ref name="flightglobal31march15">{{cite web |last1=Trimble |first1=Stephen |url=http://www.flightglobal.com/news/articles/us-army-outlines-ch-47f-upgrades-for-100-year-lifespan-410729/ |title=US Army outlines CH-47F upgrades for 100-year lifespan |publisher=Flightglobal.com |access-date=31 March 2015 |date=31 March 2015 |archive-url=https://web.archive.org/web/20150402134931/http://www.flightglobal.com/news/articles/us-army-outlines-ch-47f-upgrades-for-100-year-lifespan-410729/ |archive-date=2 April 2015 |url-status=live}}</ref> The Advanced Chinook Rotor Blades (ACRB), derived from the cancelled [[RAH-66 Comanche]], were intended to improve lift performance in hot/high altitude conditions by 900&nbsp;kg (2,000&nbsp;lb); however, the US Army ultimately decided against implementing the ACRB due to persistent vibration during testing, Boeing denied the assertion that the vibration was a safety risk and believed it could be solved with dampeners. In addition, the aft rotor blade was stalling when in a swept back position.<ref>{{cite web |url=https://www.defensenews.com/digital-show-dailies/aaaa/2022/04/05/us-army-shelves-advanced-ch-47f-rotor-blades-due-to-issues-in-testing/ |title=US Army shelves advanced CH-47F rotor blades due to issues in testing |work=Defense News |last=Judson |first=Jen |date=5 April 2022 |access-date=19 April 2022}}</ref>

The U.S. Army plans for a Block 3 upgrade after 2025, which could include a new {{convert|6000|hp|kW|abbr=on}} class engine with boosted power capacity of the transmission and drive train developed under the future affordable turbine engine (FATE) program and a lengthened fuselage. The [[Future Vertical Lift]] program is planned to begin replacing the Army's rotorcraft fleet in the mid-2030s, initially focusing on medium-lift helicopters, thus the CH-47 is planned to be in service beyond 2060, over 100 years after the first entered service.<ref name="flightglobal31march15"/>

=== MH-47G ===
[[File:Special Boat Team takes flight with Nightstalkers (14165572918).jpg|thumb|MH-47G Chinook hoisting a boat during an exercise on [[Moses Lake]] ]]

The MH-47G Special Operations Aviation (SOA) version is similar to the MH-47E, but features more sophisticated avionics including a digital Common Avionics Architecture System (CAAS). The CAAS is a common glass cockpit used by helicopters such as MH-60K/Ls and CH-53E/Ks.<ref>Warwick, Graham (1 April 2008). [http://www.flightglobal.com/articles/2008/04/01/222554/chinook-caas-unites-rotorcraft-cockpits.html "Chinook: CAAS unites rotorcraft cockpits"]. {{Webarchive |url=https://web.archive.org/web/20080404103218/http://www.flightglobal.com/articles/2008/04/01/222554/chinook-caas-unites-rotorcraft-cockpits.html |date=4 April 2008}}. ''Flight International''.</ref> The MH-47G also incorporates all of the new sections of the CH-47F.<ref>[http://www.boeing.com/rotorcraft/military/mh47e/index.htm "MH-47E/G Special Operations Chinook product page"]. {{webarchive |url=https://web.archive.org/web/20121221060837/http://www.boeing.com/rotorcraft/military/mh47e/index.htm|date=21 December 2012}}. Boeing.</ref>

The modernization program improves MH-47D and MH-47E Special Operations Chinooks to the MH-47G design specs. A total of 25 MH-47E and 11 MH-47D aircraft were upgraded by the end of 2003.{{citation needed|date=February 2023}} The final MH-47G was delivered to the U.S. Army Special Operations Command (USASOC) on 10 February 2011. Modernization of MH-47D/Es to the MH-47G standard is due by 2015.<ref>[http://www.defensemedianetwork.com/stories/superfast-helicopters/ "Superfast Helicopters"]. {{Webarchive|url=https://web.archive.org/web/20130331104148/http://www.defensemedianetwork.com/stories/superfast-helicopters/|date=31 March 2013}}. Defensemedianetwork.com, 25 October 2011.</ref> On 1 September 2020, Boeing announced the delivery of the first MH-47G Block II to USASOC of an initial order of 24, with a stated ultimate requirement for 69. The MH-47G Block II includes all of the improvements from the CH-47F Block II, as well as inflight refueling capability, a comprehensive defensive aids suite and low-level/adverse weather piloting aids, such as forward-looking infrared and multi-mode/terrain-following radar. It is armed with two 7.62&nbsp;mm M134 Miniguns and two M240 7.62&nbsp;mm machine guns.<ref>{{Cite web |last=Donald |first=David |date=2 September 2020 |title=First Block II Chinook for Special Operations Command |url=https://www.ainonline.com/aviation-news/defense/2020-09-02/first-block-ii-chinook-special-operations-command |publisher=AIN Online |access-date=8 July 2021}}</ref>

The British MOD confirmed that while the U.S. does not export the model, the two countries were in discussion regarding the MH-47G {{as of|2017|lc=y}}.<ref>{{cite web |last=Haxell |first=Helen |date=12 September 2017 |title=DSEI 2017: Chinook to stay in UK's future fleet |url=https://www.shephardmedia.com/news/defence-helicopter/dsei-2017-chinook-stay-uks-future-fleets/ |archive-url=https://web.archive.org/web/20170916010614/https://www.shephardmedia.com/news/defence-helicopter/dsei-2017-chinook-stay-uks-future-fleets/ |archive-date=16 September 2017 |url-status=dead |publisher=Shephard Media |access-date=15 September 2017}}</ref> On 19 October 2018, the Defense Security Cooperation Agency notified Congress of a possible sale of 16 H-47 Chinooks (Extended Range) to the UK.<ref>{{Cite press release |title=United Kingdom – H-47 Chinook (Extended Range) Helicopters and Accessories |url=http://www.dsca.mil/major-arms-sales/united-kingdom-h-47-chinook-extended-range-helicopters-and-accessories |publisher=DSCA |archive-url=https://web.archive.org/web/20181020140520/http://www.dsca.mil/major-arms-sales/united-kingdom-h-47-chinook-extended-range-helicopters-and-accessories |archive-date=20 October 2018 |url-status=dead |access-date=20 October 2018}}</ref>

===CH-47J===
[[File:CH47 ResqueDisplay.jpg|thumb|left|CH-47J offloads a car for a display.]]

The CH-47J is a medium-transport helicopter for the [[Japan Ground Self-Defense Force]] (JGSDF), and the [[Japan Air Self-Defense Force]] (JASDF).<ref>[http://www.helis.com/database/model/338/ Kawasaki Heavy Industries CH-47J] {{Webarchive |url=https://web.archive.org/web/20161118164613/http://www.helis.com/database/model/338/ |date=18 November 2016}} ''helis.com'' Retrieved 18 November 2016</ref> The differences between the CH-47J and the CH-47D are the engine, rotor brake and avionics, for use for general transportation, SAR and disaster activity like U.S. forces.<ref name="crawford_p48">{{cite book |title=Twenty-first century military helicopters: today's fighting gunships |last=Crawford |first=Steve |year=2003 |publisher=Zenith Imprint |isbn=978-0-7603-1504-0 |page=[https://archive.org/details/twentyfirstcentu0000craw_q2r0/page/48 48] |url=https://archive.org/details/twentyfirstcentu0000craw_q2r0/page/48}}</ref> The CH-47JA, introduced in 1993, is a long-range version of the CH-47J, fitted with an enlarged fuel tank, an AAQ-16 FLIR in a turret under the nose, and a partial glass cockpit.<ref name="crawford_p48" /><ref name="vector_foreign">{{Cite web |url=http://www.vectorsite.net/avch47_2.html#m2 |title=Chinook in commercial & foreign service |author=goebel, greg |publisher=Vectorsite.net |access-date=9 March 2011 |url-status=usurped |archive-url=https://web.archive.org/web/20101227211735/http://www.vectorsite.net/avch47_2.html |archive-date=27 December 2010}}</ref> Both versions are built under license in Japan by [[Kawasaki Heavy Industries]], who produced 61 aircraft by April 2001.<ref>{{cite web |url=http://lobby.la.psu.edu/016_Funding_for_CH47/Organizational_Statements/Boeing/Boeing_Core_Business_Activities.pdf |title=Boeing Core Business Activities |author=McGinley, Donna |publisher=Advocacy and Public Policymaking |access-date=9 March 2011 |archive-url=https://web.archive.org/web/20110612081612/http://lobby.la.psu.edu/016_Funding_for_CH47/Organizational_Statements/Boeing/Boeing_Core_Business_Activities.pdf |archive-date=12 June 2011 |url-status=dead}}</ref>

The [[Ministry of Defense (Japan)|Japan Defense Agency]] ordered 54 aircraft of which 39 were for the JGSDF and 15 were for the JASDF. Boeing supplied flyable aircraft, to which Kawasaki added full avionics, interior, and final paint.<ref name="flightglobal_ch47j">{{cite web |url=http://www.flightglobal.com/pdfarchive/view/1986/1986%20-%200851.html |title=Flight International. Number 4006. Volume 129. New-build CH-47D ready for co-production. p.11. |work=Flight International |date=12 April 1986 |access-date=9 March 2011 |archive-url=https://web.archive.org/web/20121104123007/http://www.flightglobal.com/pdfarchive/view/1986/1986%20-%200851.html |archive-date=4 November 2012 |url-status=live}}</ref> The CH-47J model Chinook (N7425H) made its first flight in January 1986, and it was sent to Kawasaki in April.<ref>{{cite web |url=http://www.aero.pub.ro/wp-content/themes/aero.pub.ro/uploads/JANE_S_ALL_THE_WORLD_S_AIRCRAF/JANE_S_ALL_THE_WORLD_S_AIRCRAF/jawa1192.htm |title=Jane's All the World's Aircraft 1999-00. THE BOEING COMPANY. BOEING 114 and 414. US ARMY MH-47E PROCUREMENT. |author=Jackson, Paul |date=22 July 1999 |access-date=9 March 2011}}{{dead link |date=July 2017 |bot=InternetArchiveBot |fix-attempted=yes}}</ref> Boeing began delivering five CH-47J kits in September 1985 for assembly at Kawasaki.<ref name="flightglobal_ch47j" />

[[File:CH-47JA.jpg|thumb|right|A [[Japan Ground Self-Defense Force]] CH-47J, 2014]]
Over 110 had been produced by the early 21st century, including the CH-47JA model with improved fuel tanks and other upgrades.<ref>{{Cite web |title=CH-47J/JA Helicopter {{!}} Kawasaki Heavy Industries |url=https://global.kawasaki.com/en/mobility/air/helicopters/ch_47j.html |access-date=2024-06-09 |website=global.kawasaki.com}}</ref>

===HH-47===
On 9 November 2006, the [[HH-47 CSAR-X Prototype|HH-47]], a new variant of the Chinook based on the MH-47G, was selected by the [[U.S. Air Force]] as the winner of the Combat Search and Rescue (CSAR-X) competition. Four development HH-47s were to be built, with the first of 141 production aircraft planned to enter service in 2012.<ref>{{cite web |url=http://www.boeing.com/news/releases/2006/q4/061109f_nr.html |title=Boeing: Boeing Awarded U.S. Air Force Combat Search and Rescue Contract |access-date=6 February 2016 |url-status=dead |archive-url=https://web.archive.org/web/20130514055512/http://www.boeing.com/news/releases/2006/q4/061109f_nr.html |archive-date=14 May 2013}} Boeing News Release</ref> However, in February 2007 the contract award was protested and the [[GAO]] ordered the CSAR-X project to be re-bid.<ref>[http://www.aviationweek.com/aw/generic/story.jsp?id=news/GAO02287.xml&headline=Bowing%20To%20GAO,%20USAF%20Likely%20To%20Recompete%20CSAR-X&channel=defense "Bowing To GAO, USAF Likely To Recompete CSAR-X"] {{Webarchive |url=https://web.archive.org/web/20120307152746/http://www.aviationweek.com/aw/generic/story.jsp?id=news%2FGAO02287.xml&headline=Bowing%20To%20GAO%2C%20USAF%20Likely%20To%20Recompete%20CSAR-X&channel=defense |date=7 March 2012}}. ''Aviation Week'', 28 February 2007.</ref> The CSAR-X program was again terminated in 2009. In February 2010, the USAF announced plans to replace aging [[HH-60G]] helicopters, and deferred secondary combat search and rescue requirements calling for a larger helicopter.<ref>Trimble, Stephen. [http://www.flightglobal.com/articles/2010/02/24/338770/usaf-abandons-large-helicopter-for-rescue-mission-proposes-buying-112.html "USAF abandons large helicopter for rescue mission, proposes buying 112 UH-60Ms"] {{Webarchive |url=https://web.archive.org/web/20110227214739/http://www.flightglobal.com/articles/2010/02/24/338770/usaf-abandons-large-helicopter-for-rescue-mission-proposes-buying-112.html |date=27 February 2011}}. ''Flight International''. 24 February 2010.</ref><ref>[https://www.fbo.gov/index?s=opportunity&mode=form&id=e0d2f218043862f1a8f4e3c3d1200c83&tab=core&_cview=1 USAF HH-60 Personnel Recovery Recapitalization Program Sources Sought RFI] {{Webarchive |url=https://web.archive.org/web/20110721040710/https://www.fbo.gov/index?s=opportunity&mode=form&id=e0d2f218043862f1a8f4e3c3d1200c83&tab=core&_cview=1 |date=21 July 2011}}. FBO.gov, 23 March 2010.</ref> In a long process the Air Force did not choose the larger Chinook, and the [[HH-60W]] entered service by 2020 to replace the older helicopters.<ref>{{Cite web |date=2020-11-06 |title=USAF's first HH-60W Jolly Green II arrives at Moody AFB |url=https://www.af.mil/News/Article-Display/Article/2407824/usafs-first-hh-60w-jolly-green-ii-arrives-at-moody-afb/https://www.af.mil/News/Article-Display/Article/2407824/usafs-first-hh-60w-jolly-green-ii-arrives-at-moody-afb/ |access-date=2023-06-20 |website=Air Force |language=en-US}}{{dead link|date=March 2025|bot=medic}}{{cbignore|bot=medic}}</ref>

=== Sea Chinook ===
For years the [[U.S. Navy]] has been operating different versions of the single-rotor [[CH-53]] helicopter as its heavy-lift helicopter. CH-47s regularly conduct ship-based operations for U.S. Special Forces and other international operators.<ref>{{Cite web|url=https://www.wearethemighty.com/gear-tech/navy-special-ops-helicopter|title = Why the Navy may look to this Army workhorse for special ops|date = 29 April 2020}}</ref> Due to budget issues, technical problems and delays with [[CH-53K]], the director of the Pentagon's cost assessment office directed US Navy to consider maritime versions of CH-47. Naval versions must be protected against the corrosive seaborne environment and be able to operate from aircraft carriers and amphibious ships.<ref>{{Cite web|url=https://www.defensenews.com/opinion/commentary/2020/02/03/replacing-us-marines-ch-53k-helos-with-ch-47f-choppers-is-a-poor-idea/|title=Replacing US Marine's CH-53K helos with CH-47F choppers is a poor idea|first=Scott|last=Trail|date=3 February 2020|website=Defense News}}</ref><ref>{{Cite news|url=https://www.bloomberg.com/news/articles/2019-05-06/pentagon-review-pits-boeing-vs-lockheed-for-marine-helicopters|title = Pentagon Review Pits Boeing vs. Lockheed for Marine Helicopters|newspaper = Bloomberg.com|date = 6 May 2019}}</ref>

===Other export models===
[[File:HMS QUEEN ELIZABETH LEAVES PORTSMOUTH FOR HELICOPTER TRIALS MOD 45164124.jpg|thumb|RAF Chinooks onboard {{HMS|Ocean|L12|6}}]]
* The [[Royal Air Force]] version of the CH-47C is designated [[Boeing Chinook (UK variants)|Chinook HC1]]; its versions of the CH-47D are designated Chinook HC2 and HC2A. Additional types in RAF service include HC3,4,5,6, and 6A. (for further reading see [[Boeing Chinook (UK variants)]])
* The export version of the CH-47C Chinook for the Italian Army was designated "CH-47C Plus".
* The HH-47D is a search and rescue version for the [[Republic of Korea Air Force]]. 
* The CH-47DG is an upgraded version of the CH-47C for Greece. 
* While the CH-47SD (also known as the "Super D") is a modified variant for Singapore of the CH-47D, with extended range fuel tanks and higher payload carrying capacity; the CH-47SD is in use by the [[Republic of Singapore Air Force]], [[Hellenic Army]] and the [[Republic of China Army]].

===Civilian models===
{{more citations needed|section|date=January 2021}}

* [[File:British Airways Helicopters Boeing 234 G-BISP.jpg|thumb|[[British Airways Helicopters]] 234LR at [[Aberdeen Airport]] in 1985]]'''Model 234LR (long range)''': Commercial transport helicopter. The Model 234LR can be fitted out as an all-passenger, all-cargo, or cargo/passenger transport helicopter.<ref name="m234">{{cite web|url=https://www.boeing.com/history/products/model-234-chinook.page|access-date=2021-12-20|website=Boeing.com|url-status=dead|archive-url=https://web.archive.org/web/20190323205620/https://www.boeing.com/history/products/model-234-chinook.page|archive-date=2019-03-23|title=Model 234 Chinook}}</ref>
* '''Model 234ER (extended range)''': Commercial transport version.
* '''Model MLR (multi-purpose long range)''': Commercial transport version.
* '''Model 234UT (utility transport)''': Utility transport helicopter.<ref name="m234"/>
* '''Model 414''': The Model 414 is the international export version of the CH-47D. It is also known as the ''CH-47D International Chinook''.
* '''CU-47''': Built by Unical from parts from ex-Canadian Forces CH-47D/CH-147D for [[Coulson Aviation]] to be used for aerial firefighting.<ref>{{Cite web |url=https://skiesmag.com/features/coulsons-cu-47-fire-fight/ |title=Coulson's CU-47 is ready for the fire fight }}</ref>

===Derivatives===
[[File:Boeing-Vertol BV-347 Chinook (65-7992) (10508872726).jpg|thumb|left|The winged BV-347]]
In 1969, work on the experimental [[Boeing Vertol BV-347|BV-347]] was begun. It was a CH-47A with a lengthened fuselage, four-blade rotors, detachable wings mounted on top of the fuselage and other changes. It first flew on 27 May 1970 and was evaluated for a few years.<ref name=Vector_CH-47_deriv>Goebel, Greg. {{usurped|1=[https://web.archive.org/web/20100626000119/http://www.vectorsite.net/avch47_2.html#m4 "ACH-47A Gunship / Model 347 / XCH-62 HLH (Model 301) / Model 360"]}}. Vectorsite.net, 1 December 2009.</ref>

In 1973, the Army contracted with Boeing to design a "Heavy Lift Helicopter" (HLH), designated [[Boeing Vertol XCH-62|XCH-62A]]. It appeared to be a scaled-up CH-47 without a conventional body, in a configuration similar to the [[S-64 Skycrane]] ([[CH-54 Tarhe]]), but the project was canceled in 1975. The program was restarted for test flights in the 1980s and was again not funded by Congress.<ref name=Vector_CH-47_deriv/> The scaled-up model of the HLH was scrapped in late 2005 at [[Fort Rucker]], Alabama.<ref>{{cite web |url=http://www.helis.com/70s/h_h62.php |title=XCH-62 with photo |access-date=13 November 2014 |archive-url=https://web.archive.org/web/20141113190853/http://www.helis.com/70s/h_h62.php |archive-date=13 November 2014 |url-status=dead}}</ref>
{{clear}}