Boeing WC-135 Constant Phoenix

File:Boeing WC-135B (717-158), USA - Air Force AN1137128.jpg

File:Boeing WC-135B (717-158), USA - Air Force AN0771765.jpg

The WC-135 was introduced in December 1965, replacing Boeing WB-50 aircraft in the weather-reconnaissance and air-sampling mission.{{cite web|url=http://www.military.com/equipment/wc-135-constant-phoenix|title=WC-135 Constant Phoenix|first=John|last=Harper}} Ten aircraft were initially converted from C-135B transport aircraft and were placed in service with the 55th Weather Reconnaissance Squadron at McClellan Air Force Base, California, with the Military Airlift Command (MAC). Detachments were located at various bases throughout the United States and worldwide. Initially, the aircraft performed both weather reconnaissance and atmospheric sampling missions; however, in February 1974, the Air Force ordered that after 1 July 1974, WC-135s be used for atmospheric sampling missions only, thus ending the aircraft's weather reconnaissance mission.Colman, George N., Air Force Weather, Our Heritage 1937-2012, An Illustrated Chronology, 1 July 2012, Pg 5-10. The aircraft occasionally took on other roles throughout their careers; several aircraft were temporarily assigned to the 10th Airborne Command and Control Squadron at RAF Mildenhall in the late 1980s and early 1990s as training aircraft so that the unit could slow the accumulation of flight hours on its EC-135Hs,{{Cite web|url=https://www.airliners.net/photo/USA-Air-Force/Boeing-WC-135B-717-158/179969|title=Aviation Photo #0179969: Boeing WC-135B (717-158) - USA - Air Force|website=Airliners.net}} while others served as staff transports on an as-needed basis.

Upon retirement from frontline weather reconnaissance service in the early 1990s, five were retained for further use. Serial no. 61-2666 was converted to an NC-135 and remains in service as a testbed for RC-135 equipment upgrades. Serial no. 61-2667 was upgraded to a WC-135W, given the project name Constant Phoenix, and remains in service with the 45th Reconnaissance Squadron at Offutt Air Force Base, Nebraska. Serial no. 61-2674 was converted to the first OC-135B Open Skies observation aircraft, reentering service in 1993. It was later stored in 1997 and replaced with two additional aircraft also converted from WC-135s.{{cite book |title=The Boeing KC-135 Stratotanker; More Than a Tanker |last=Hopkins III |first=Robert S. |year=2017 |pages=289 |publisher=Crecy Publishing Limited |isbn=978-1-91080-901-3}}

In 1998, a former EC-135C, serial no. 62-3582, was converted into a WC-135C, also designated Constant Phoenix.

In April 2018 it was announced that three KC-135R tanker aircraft would be converted as WC-135R Constant Phoenix aircraft to replace the two aircraft operated by the 45th Reconnaissance Squadron. The first aircraft was scheduled to be converted by L3 Technologies at Greenville, Texas starting in September 2019.Air Force Times "Air Force to start transforming tankers into WC-135 "nuke sniffers" in FY19" dated April 26, 2018

In November 2020, WC-135C, tail number 62-3582, was retired during a ceremony at Offutt Air Force Base, Nebraska. During its 56 year career, it amassed 29,680 flight hours and 72,251 landings.{{cite news |last1=Liewer |first1=Steve |title=55th Wing retires cranky plane — dubbed 'Lucifer's Chariot' — in Offutt ceremony |url=https://omaha.com/news/local/55th-wing-retires-cranky-plane-dubbed-lucifers-chariot-in-offutt-ceremony/article_3d8f12b6-19ac-5d0e-af78-03544b91f3c7.html |access-date=17 November 2020 |agency=Omaha World Herald |date=16 November 2020}} During its retirement ceremony, the 55th Wing chaplain dubbed the aircraft "Lucifer's Chariot", although the aircraft was never referred to by that name during its operational life.{{cite web |last=Roza |first=David |date=December 8, 2020 |url=https://taskandpurpose.com/news/air-force-nuke-sniffer-retirement-lucifers-chariot/= |title='You are the reason I drink' — Airmen bid adieu to decrepit aircraft dubbed 'Lucifer's Chariot' |website=Task and Purpose |access-date=September 29, 2022 }}{{Dead link|date=October 2023 |bot=InternetArchiveBot |fix-attempted=yes }}

In June 2022, the first of three planned WC-135R aircraft (serial number 64-14836) completed its maiden test flight, and was delivered to the 55th Wing on 11 July 2022.{{cite web |last1=HELFRICH |first1=EMMA |title=Air Force's First 'New' Constant Phoenix Nuke-Sniffing Jet Has Flown |url=https://www.thedrive.com/the-war-zone/air-forces-first-wc-135r-constant-phoenix-nuke-sniffing-jet-has-flown |website=The Drive Warzone |date=June 30, 2022 |access-date=4 July 2022}}{{cite web |url=https://www.offutt.af.mil/News/Article/3090736/team-offutt-welcomes-first-wc-135r-to-its-fleet/ |title=Team Offutt welcomes first WC-135R to its fleet |date=July 12, 2022 |access-date=2022-07-12}} The other two were delivered in May 2023 (tail number 64-14831){{cite web |url=https://www.offutt.af.mil/News/Article-Display/Article/3394549/second-wc-135r-arrives-at-offutt/ |title=Second WC-135R arrives at Offutt |date=May 12, 2023 |access-date=December 21, 2023}} and December 2023 (tail number 64-14829)

The WC-135B, WC-135W, and WC-135R Constant Phoenix atmospheric-collection aircraft support national-level intelligence consumers by collecting particulate debris and gaseous effluents from accessible regions of the atmosphere in support of the Limited Nuclear Test Ban Treaty of 1963. The information collected by the aircraft is utilized by Detachment 1 of the Air Force Technical Applications Center's 21st Surveillance Squadron.

File:61-2673 Boeing WC-135B (717-158) (cn 18349) US Air Force, RIAT 1993. (7104903681).jpg 1993. In this image the external air-sampling pod is visible (immediately underneath the word 'States')]]

The Constant Phoenix's modifications are primarily related to the aircraft's on-board atmospheric collection suite, which allows the mission crew to detect radioactive debris "clouds" in real time. The aircraft is equipped with external flow-through devices to collect particulates on filter paper and a compressor system for whole air samples collected in high-pressure holding spheres. Despite the different designations, both the C- and W-models carry the same mission equipment (with a front-end avionics suite similar to the RC-135V and W aircraft). In addition to its collection systems, the WC-135 is equipped with a variety of aircrew safety systems which detect ambient air inside the cabin to detect radiation which may have contaminated the inside of the cabin. The cabin also contains two sets of air filtration systems, known as the "lungs", which filter all air entering the cabin of any hazardous contaminants. The WC-135R uses an improved next-generation collection suite as compared to the WC-135C/W, however the primary system functions are generally similar.

The interior seats 33 people, including the cockpit crew, maintenance personnel, and special equipment operators from the Air Force Technical Applications Center. On operational sorties, the crew is minimized to just pilots, navigator, and special-equipment operators, to reduce radiation exposure to mission-essential personnel only.

• WC-135B - 10 initial aircraft, converted from C-135Bs
• WC-135C - Converted from former Looking Glass EC-135C Tail Number 62-3582, carries the same equipment as WC-135W
• WC-135R - 3 converted KC-135Rs, announced in 2018 and included on the FY19 budget request.{{Cite web |last=Trevithick |first=Joseph |date=2018-02-14 |title=The US Air Force Wants a Trio of More Modern WC-135R Nuke Sniffing Planes |url=https://www.thedrive.com/the-war-zone/18472/the-us-air-force-wants-a-trio-of-more-modern-wc-135r-nuke-sniffing-planes |access-date=2022-07-01 |website=The Drive |language=en}} The first converted aircraft, Tail Number 64-14836, was delivered in July 2022.{{Cite web |last=Helfrich |first=Emma |date=2022-06-30 |title=Air Force's First 'New' Constant Phoenix Nuke-Sniffing Jet Has Flown |url=https://www.thedrive.com/the-war-zone/air-forces-first-wc-135r-constant-phoenix-nuke-sniffing-jet-has-flown |access-date=2022-07-01 |website=The Drive |language=en}}{{Cite web |title=Team Offutt welcomed a new aircraft to its fleet for the first time in decades when WC-135R Constant Phoenix tail number 14836 arrived at @lnk_airport today. This is the first of three WC-135R deliveries to the 55th Wing as the @usairforce is modifying three KC-135R Stratotankers to replace the aging aircraft. Originally delivered to the AF in 1964 and most recently flown by the New Hampshire Air National Guard, the new WC-135R was modified by Big Safari and will serve as the Air Force's newest atmospheric collection aircraft supporting national and international partners. Operated by the 45th Reconnaissance Squadron with support from Detachment 1, AF Technical Applications Center, it collects particulate and gaseous effluents and debris from accessible regions of the atmosphere in support of the Limited Nuclear Test Ban Treaty of 1963.|url=https://www.instagram.com/p/Cf42yWmMS5x/ |access-date=2022-07-12 |website=Instagram}}
• WC-135W - Re-designation of WC-135B Tail Number 61-2667 after upgrades and removal of flight engineer crew position in the 1990s.

;{{USA}}

• United States Air Force – Air Combat Command{{cite web|url=http://www.globalsecurity.org/military/agency/usaf/55wg.htm|title=55th Wing [55th WG]|first=John|last=Pike}}
• 55th Wing – Offutt AFB, Nebraska
• 45th Reconnaissance Squadron

{{Aircraft specs

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|eng1 name=Pratt & Whitney TF33-P-9 (WC-135C) / Pratt & Whitney TF33-P-5 (WC-135W)

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WC-135B aircraft flew 25 sorties in 1979 to try to ascertain whether a double flash in the South Atlantic that was detected by a Vela satellite was a nuclear weapons test;{{cite web|publisher=United States Airforce via National Security Archive|date=2006-05-04|access-date=2008-08-25|title=History of the Air Force Technical Applications Centre, Patrick Airforce Base, Florida: Volume 1|url=http://www.gwu.edu/~nsarchiv/NSAEBB/NSAEBB190/15.pdf}} however, the result was inconclusive.

On October 6, 2006, Japan's Kyodo News agency reported that a US military aircraft, equipped to detect radiation from a nuclear test, took off from southern Japan. This was believed to be part of US efforts to prepare to monitor a North Korean nuclear test. On October 9, 2006, North Korea's official Korean Central News Agency (KCNA) reported that the country had performed a successful underground nuclear test. On October 13, 2006, CNN reported: "The U.S. Air Force flew a WC-135 Constant Phoenix atmospheric collection aircraft on Tuesday to collect air samples from the region. A preliminary analysis of air samples from North Korea shows 'radioactive debris consistent with a North Korea nuclear test', according to a statement from the office of the top U.S. intelligence official. The statement, from the office of Director of National Intelligence John Negroponte, was sent to Capitol Hill but not released publicly. CNN obtained it from a congressional source. The national intelligence office statement said the air samples were collected Wednesday, and analysis found debris that would be consistent with a nuclear test 'in the vicinity of Punggye' on Monday. The South Korean Defense Ministry told CNN that the United States has informed it that radioactivity has been detected." The aircraft was based at Offutt AFB and was sent to Kadena Air Base on Okinawa to operate during the sampling missions.Timesonline.co.uk, [https://archive.today/20110604112455/http://www.timesonline.co.uk/article/0,,3-2398307,00.html Cold War aircraft searches the sky for proof of test].

On June 17, 2009, JoongAng Daily reported, in reference to a purported May 25 nuclear test by North Korea: "The U.S. Air Force twice dispatched a special reconnaissance jet, the WC-135 Constant Phoenix from Kadena Air Base in Okinawa, Japan, to collect air samples."joongangdaily.joins.com, [http://joongangdaily.joins.com/article/view.asp?aid=2906243 U.S. finds that North test in May was nuclear].

On November 23, 2010, Sankei Shimbun reported that a WC-135 had been moved to Kadena Air Base in September 2010, in anticipation of a North Korean nuclear test.{{cite web|url=http://english.chosun.com/site/data/html_dir/2010/11/24/2010112400941.html|title=U.S. Moves Spy Aircraft in Preparation for N.Korean Nuke Test|work=The Chosun Ilbo (English Edition)|date=November 24, 2010|access-date=January 8, 2016|archive-date=March 10, 2021|archive-url=https://web.archive.org/web/20210310004344/http://english.chosun.com/site/data/html_dir/2010/11/24/2010112400941.html|url-status=dead}}

On January 31, 2013, the WC-135W was reported to be conducting surveillance flights out of Kadena Air Base in anticipation of another North Korean nuclear test.{{cite news|url=http://www.hani.co.kr/arti/english_edition/e_northkorea/572198.html|title=Clinton still hoping North Korea won't conduct a nuclear test|author=Park Hyun and Jeong Nam-ku|publisher=The Hankyoreh |date=January 31, 2013|access-date=February 13, 2013}}

On January 6, 2016, the United States Air Force confirmed plans to soon deploy the WC-135 to test for radiation near North Korea to examine North Korea's claim that they had successfully conducted a hydrogen-bomb test on January 5 (EST).{{cite news|last=Lamothe|first=Dan|url=https://www.washingtonpost.com/news/checkpoint/wp/2016/01/06/this-is-the-air-force-radiation-sniffing-plane-deploying-after-north-koreas-nuclear-test/|title=This is the Air Force radiation sniffer plane deploying after North Korea's nuclear test|date=January 6, 2016|newspaper=Washington Post|access-date=January 8, 2016}}

On September 8, 2016, it was reported that the WC-135 would soon begin surveillance flights near the Korean Peninsula{{cite web|url=http://www.cnn.com/2016/09/08/politics/us-air-force-radiation-sniffer-jet/index.html|title=US to fly 'radiation sniffer' jet off Korea|first=Brad |last=Lendon|date=September 9, 2016 |publisher=CNN}} after South Korean officials confirmed that North Korea conducted its fifth nuclear test at approximately 0:30 UTC.{{cite web|url=http://www.cnn.com/2016/09/08/asia/north-korea-seismic-activity/index.html|title=North Korea claims successful test of nuclear warhead|author1=Katie Hunt |author2=K. J. Kwon |author3=Jason Hanna|date=September 9, 2016 |publisher=CNN}}

On April 12, 2017, it was deployed to Okinawa amid rising tensions with North Korea. North Korea conducted a missile test on April 3, 2017.{{Cite news|url=https://www.stripes.com/news/nuke-sniffer-aircraft-arrives-on-okinawa-as-tensions-rise-on-korean-peninsula-1.463108#.WO5ehvnythE|title=Nuke-sniffer aircraft arrives on Okinawa as tensions rise on Korean peninsula|work=Stars and Stripes|access-date=2017-04-12}}

On May 19, 2017, two Chinese Su-30 fighter jets intercepted a WC-135 over the East China Sea, prompting a formal complaint from the Pentagon.{{Cite news|url=http://edition.cnn.com/2017/05/18/politics/china-us-jets-intercept/|title=Chinese fighter flies inverted over US Air Force jet|work=CNN|access-date=2017-05-19}}

On March 17, 2011, CNN reported that the WC-135W had been deployed from Offutt AFB to Eielson Air Force Base in Alaska. From there it assisted in detecting radioactive materials in the atmosphere around Japan, monitoring radioactivity released from the Fukushima I Nuclear Power Plant caused by the magnitude 9.0 earthquake and subsequent tsunami of March 11, 2011.{{cite news | url=http://news.blogs.cnn.com/2011/03/16/japan-quake-live-blog-death-toll-expected-to-rise-as-crews-reach-more-areas/?iref=allsearch | work=CNN | title=Japan quake tsunamiThis Just In | date=March 16, 2011 | access-date=March 17, 2011 | archive-date=March 18, 2022 | archive-url=https://web.archive.org/web/20220318183407/https://news.blogs.cnn.com/2011/03/16/japan-quake-live-blog-death-toll-expected-to-rise-as-crews-reach-more-areas/?iref=allsearch | url-status=dead }}{{Cite web|url=http://cosmiclog.msnbc.msn.com/_news/2011/03/16/6282458-us-boosts-radiation-sniffing-system|title=Cosmic Log - U.S. boosts radiation-sniffing system|date=March 19, 2011|archive-url=https://web.archive.org/web/20110319043047/http://cosmiclog.msnbc.msn.com/_news/2011/03/16/6282458-us-boosts-radiation-sniffing-system|archive-date=March 19, 2011}}{{Cite web|url=http://www.nrc.gov/docs/ML1205/ML12052A249.pdf|title=FOIA – 2011-0118/0119/012|date=January 26, 2012|website=Nuclear Regulatory Commission}}

In 1986, multiple WC-135Bs were deployed to Europe to help monitor the air after the Chernobyl disaster.{{Cite web|url=https://www.defensemedianetwork.com/stories/constant-phoenix-after-decades-of-service-a-little-recognition-at-last/|title=Constant Phoenix: After Decades of Service, a Little Recognition at Last}}{{Cite web|url=https://www.af.mil/About-Us/Fact-Sheets/Display/Article/104494/wc-135-constant-phoenix/|title=WC-135 Constant Phoenix > U.S. Air Force > Fact Sheet Display|website=www.af.mil|language=en-US|access-date=2017-04-18}}

On February 17, 2017, it was reported that the WC-135C had been deployed to RAF Mildenhall. It was conjectured that this came in response to several reports of anomalous levels of iodine-131 coming from the Norwegian-Russian Border, but as of April 10, 2017, there was no official cause of the iodine-131 release.{{Cite web|url=https://theaviationist.com/2017/02/19/u-s-air-force-deploys-wc-135-nuclear-sniffer-aircraft-to-uk-after-spike-of-radioactive-iodine-levels-detected-in-europe/|title=U.S. Air Force deploys WC-135 nuclear sniffer aircraft to UK as spike of radioactive Iodine levels is detected in Europe|date=2017-02-19|website=The Aviationist|access-date=2017-04-12}}{{Cite web|url=http://www.euronews.com/2017/02/23/europe-baffled-by-recent-release-of-radioactive-iodine-131|title=Europe baffled by "recent release" of radioactive Iodine-131|last=Bertrand|first=Pierre|date=2017-02-23|website=euronews|access-date=2017-04-12}}{{cite web|url=http://www.thedrive.com/the-war-zone/7758/has-there-been-a-nuclear-incident-in-the-arctic|title=Has There Been A "Nuclear Incident" In The Arctic?|first=Tyler|last=Rogoway|date=February 19, 2017 }}

In late July and early August 2021 a WC-135W deployed to Europe and carried out measurements over the Baltic Sea and Sweden. A connection is suspected with the technical problems of the Russian Oscar-II-class submarine Orel, which subsequently had to be tugged back.{{Cite web|last=Steinke|first=Sebastian|date=2021-08-06|title=Suche nach nuklearen Partikeln vor Bornholm?: USAF schickt Spürflugzeug über die Ostsee|url=https://www.flugrevue.de/militaer/suche-nach-nuklearen-partikeln-vor-bornholm-usaf-schickt-spuerflugzeug-ueber-die-ostsee/|access-date=2021-08-06|website=www.flugrevue.de|language=de}}

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{{aircontent

|related=

• Boeing C-135 Stratolifter
• Boeing KC-135 Stratotanker
• Boeing OC-135B Open Skies
• Boeing RC-135

|similar aircraft=

• WC-130

|lists=

• List of active United States military aircraft

|see also=

}}

{{Reflist}}

{{US Air Force}}

• [https://web.archive.org/web/20090902193157/http://www.af.mil/information/factsheets/factsheet.asp?id=192 USAF: WC-135 Constant Phoenix – Factsheet]
• [http://www.airliners.net/open.file/777694/L/ Airliners.net Boeing WC-135W (717-158)]
• [http://www.globalsecurity.org/intell/systems/constant_phoenix.htm GlobalSecurity.org WC-135 page]
• [https://fas.org/irp/program/collect/constant_phoenix.htm Fas.org WC-135 page]
• [http://www.cnn.com/2006/WORLD/asiapcf/10/14/nkorea.test.sample/index.html CNN coverage of Constant Phoenix and North Korean Nuclear Test]

{{707 military variants}}

{{USAF system codes}}

{{DEFAULTSORT:Wc-135 Constant Phoenix}}

C-135W Constant Phoenix

C-0135W Constant Phoenix

Category:Quadjets

Category:Low-wing aircraft

Category:Aircraft with retractable tricycle landing gear