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Dassault Falcon 20
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The Dassault Falcon 20 is a French business jet developed and manufactured by Dassault Aviation. The first business jet developed by the firm, it became the first of a family of business jets to be produced under the same name; of these, both the smaller Falcon 10 and the larger trijet Falcon 50 were direct derivatives of the Falcon 20.
Key Information
Initially known as the Dassault-Breguet Mystère 20, approval to proceed with development of the aircraft was issued during December 1961. It is a low-wing monoplane design, powered by a pair of rear-mounted General Electric CF700 turbofan engines. On 4 May 1963, the prototype made its maiden flight. The first production aircraft was introduced on 3 June 1965. On 10 June 1965, French aviator Jacqueline Auriol achieved the women's world speed record using the first prototype.
As a result of an early distributor arrangement with American airline Pan American (Pan Am), American-delivered aircraft were marketed under the name Fan Jet Falcon; it soon became popularly known as the Falcon 20. American orders proved valuable early on; by 1968, Pan Am Business Jets Division had placed orders for 160 Falcon 20s. Further major orders were soon placed for the type by several operators, both civil and military; amongst others, these included the French Navy, the United States Coast Guard, and Federal Express.
An improved model of the aircraft, designated the Falcon 200, was developed. This variant, powered by a pair of Garrett ATF3 engines, featured several major improvements to increase its range, capacity, and comfort. Additionally, a number of Falcon 20s that had been originally powered by the CF700 engines were later re-engined with Garrett TFE731 turbofan engines. The aircraft proved to be so popular that production did not end until 1988, when it had been superseded by more advanced developments of the Falcon family. Due to the increasing implementation of noise-abatement regulations, the Falcon 20 has either been subject to restrictions on its use in some nations, or been retrofitted with Stage 3 noise-compliant engines or hush kits upon its non-compliant engines. The type has also been used as a flying test bed and aerial laboratory by a number of operators, including NASA. In November 2012, a Falcon 20 had the distinction of becoming the first civilian jet to fly on 100% biofuel.
Development
[edit]Origins
[edit]

During the 1950s and 1960s, the French government, which had taken a significant interest in the re-establishment and growth of its national aviation industries in the aftermath of the Second World War, developed a detailed request for a combined liaison/trainer aircraft, to be equipped with twin-turbofan engines.[3] Among those companies that took interest in the government request was French aircraft manufacturer Dassault Aviation. In December 1961, French aircraft designer and head of Dassault Aviation, Marcel Dassault, gave the go-ahead to proceed with work towards the production of an eight- to 10-seat executive jet/military liaison aircraft, which was initially named as the Dassault-Breguet Mystère 20.[3] The emerging design was of a low-wing monoplane, which drew upon the aerodynamics of the transonic Dassault Mystère IV fighter-bomber, and was equipped with a pair of rear-mounted 14.68 kN (3,300 lbf) Pratt & Whitney JT12A-8 turbojet engines.[3]
On 4 May 1963, the Mystère 20 prototype, registered F-WLKB, conducted its maiden flight from Bordeaux–Mérignac Airport, Gironde, France. By this stage, attention in the programme was centered around the commercial opportunities for the type, particularly the large North American market.[3] According to aerospace publication Flying, while Dassault had achieved satisfactory technical progress on the Mystère 20, it was recognised even by the company's officials that the firm lacked both the sales presence and the experience to effectively market the type to English-speaking nations. Accordingly, the option of directly selling the type was discarded in favour of seeking an established US distributor.[3] Coincidentally, management at Pan Am happened to be seeking a suitable aircraft to launch its planned corporate jet aircraft sales division, and following a review of a range of available business jets of the era, took an interest in the Mystère 20.[3]
Progress between Dassault and Pan Am was rapid, moving from engineering evaluations of the type to the formation of general agreements between the two companies.[3] In response to feedback received from Pan American, the aircraft was re-engined with a pair of General Electric CF700 engines and several dimensions were increased. Accordingly, Pan American formed an agreement with Dassault to distribute the Mystère 20 in the western hemisphere; the firm placed an initial order for 40 aircraft along with options for a further 120. On 10 July 1964, the re-engined aircraft made its first flight. On 1 January 1965, the first production aircraft performed its maiden flight; in June 1965, both French and American type certifications were awarded. On 10 June 1965, French aviator Jacqueline Auriol achieved the women's world speed record using the first Mystère 20 prototype, having flown at an average recorded speed of 859 km/h over a distance of 1000 km.[citation needed]
Deliveries of the type soon commenced to Pan American's outfitting facility at Burbank Airport, California. All non-American aircraft were fitted out prior to delivery at Bordeaux-Merignac. During 1966, the company redesignated the American-delivered aircraft as the Fan Jet Falcon; this was subsequently shortened to the Falcon 20. During 1967, Pan Am Business Jets Division decided to increase their firm orders for the type to 160 Falcon 20s. Military orders for the type were quickly received from Australia, the U.S., and Canada, in addition those placed by France.
In 1973, FedEx's Falcons, designation FA-20-DC, cost $1.2 million each and were modified with a 55-by-74.5-inch forward cargo door with independent power supply, higher mtow, reinforced floor, plugged windows, and bigger brakes.[4]
Further development
[edit]A number of Falcon 20s that had been originally powered by CF700 engines were later re-engined with Garrett TFE731 engines under AMD-BA Service Bulletin No. 731.[5] To distinguish these re-engined aircraft from those still using the original powerplant, they were redesignated with a "-5" suffix inserted after the model number. Volpar Inc. was involved in a program to re-engine the Falcon 20 with the Pratt & Whitney Canada PW305 engines;[6] however, work on the program was abandoned before a Federal Aviation Administration (FAA) STC was awarded.[7]

An improved model of the aircraft, designated the Falcon 200, was developed, which featured more advanced jet engines and other major improvements to increase range, capacity, and comfort.[8] The Falcon 200, along with the Falcon 20G and HU-25 models, were powered by a pair of Garrett ATF3 engines. According to the magazine Flying, the Falcon 200 variant was more comparable to the newer Falcon 50 trijet than the original Falcon 20 model.[9]
Due to its popularity, Dassault studied and worked upon various variants and extensive derivatives of the Falcon 20. Later-built developments of the type include the smaller Falcon 10; the larger 30-seat Falcon 30 with a larger fuselage cross section, which was built and test flown, but did not proceed to production; and the Falcon 50, an improved three-engined development. The Falcon 20 proved to be so popular that production was not terminated until 1988, when it had been superseded by more advanced developments of the Falcon family. A total of 473 Falcon 20s and 35 Falcon 200s had been constructed by the end of the type's production.[10]
During 2013, the FAA modified 14 CFR part 91 rules to prohibit the operation of jets weighing 75,000 pounds or less that were not Stage 3 noise compliant after 31 December 2015. The Falcon 20 was listed explicitly in Federal Register 78 FR 39576. Any examples of the type that had not been modified, either by the installation of Stage 3 noise-compliant engines or have had hush kits installed upon noncompliant engines, were no longer permitted to fly anywhere in the contiguous 48 states after 31 December 2015. However, 14 CFR §91.883 Special flight authorizations for jet airplanes weighing 75,000 pounds or less – lists special flight authorizations that may be granted for operation after 31 December 2015.[citation needed]
Design
[edit]
The Dassault Falcon 20 is a French business jet, often considered to be an easy to fly and relatively visually appealing aircraft.[11] The favourable flight qualities of the aircraft meant that no need existed to incorporate a stick pusher or stall-barrier systems to achieve its predictable stall behaviour.[9] The flight controls of the Falcon 20 are hydraulically powered, augmenting the mechanical pushrods between the cockpit controls and the flight control surfaces.[9] In the event of complete hydraulic failure, the aircraft can be practically flown without any augmentation. The controls incorporate an artificial feel system, optimising the sensations perceivable to the operating pilot to be smooth, predictable, and precise.[12] On the Falcon 200, the cockpit is heavily modernised, being more comparable with the newer Falcon 50 than the original Falcon 20.[12]
The Falcon 20 is powered by a pair of rear-mounted turbofan engines; most commonly powered by a pair of General Electric CF700 engines, the type has also been powered by alternative powerplants, including the Garrett TFE731 and ATF3 engines.[13] The adoption of newer engines often had the benefit of improving the Falcon 20's range in addition to increased speed and climb rate; this, in combination with its low-drag fuselage, required more careful speed planning than the majority of business jets. On some models, protection against engine conditions such as instances of over-speed and over-heating is provided by electronic flight computers, as is the aircraft's 'throttle-lock' power management system to maintain safe levels of engine power throughout climbs without any crew commands.[14] As conventional thrust reversers are not compatible with the location of the engines, an alternative configuration in the form of rotatable doors fixed to the outer cowling of the engine partially cover both the engine fan and core exhaust, deflecting thrust upwards and forwards.[15]
The Falcon 20 is furnished with a highly swept wing; it is equipped with leading-edge slats to improve its slow speed performance and decrease the stalling speed.[9] When approaching a high angle of attack, the slats are automatically deployed; when nearing a potential stall, the inner section of the slats then retract to provide for a stable and predictable stall with effective aileron controls throughout. On the Falcon 200 model, the wing was re-profiled for improved low-speed performance and shortened runway requirements, as well as the addition of an unusual wing root fillet section and a shortened wing fence; the development of an entirely new wing was under consideration at one point, but the improved performance was not viewed to justify the expense.[9] While air brakes are present upon the wing, these are less smooth and more noisy than the use of the dual-brake arrangement upon the landing gear. For ease of movement on the ground, a fully steerable nosewheel is incorporated and is controlled from the captain's position in the cockpit.[16]
Supplemental Type Certificate SA5858SW, issued by the American Federal Aviation Administration (FAA), and held by Falcon Jet Corporation allows for the installation of underwing pylons upon the Fan Jet Falcon, Fan Jet Falcon Series D and Fan Jet Falcon Series E. This modification has been commonly used upon those Falcon 20s which have been operated as special mission aircraft, which would often make use of underwing stores.[17] Substantial numbers of Falcon 20s were converted into cargo-carrying configurations; a hydraulically-operated cargo door served to simplify loading-unloading operations.[18] According to Flying Magazine, upon its launch, the Falcon 200 model had the largest cabin of any mid-size business jet. Additionally, the rear fuselage of the Falcon 200 was re-designed to accommodate a 28-cubic foot baggage compartment within the tailcone, which supplements the standard aft cabin baggage compartment.[15]
Operational history
[edit]Commercial, corporate, and private use
[edit]While sales in the North American market was initially strong, sales were negatively impacted by the Recession of 1969–70, which led to excess unsold Falcon 20 aircraft temporarily building up while Pan American Business Jets Division sought sales of the type.[3] By late 1973, American sales had recovered while responsibility for sales had been transferred to the Falcon Jet Corporation, an organisation jointly staffed by Pan American and Dassault personnel in which Dassault became the pre-dominant partner in the venture. Additionally, by this point, Dassault were already preparing for the launch of a smaller and improved derivative of the aircraft onto the market, which was marketed as the Dassault Falcon 10.[3]
During the late 1950s and early 1970s, aviation businessman Frederick W. Smith was seeking an ideal aircraft with which to launch his new business, Federal Express; Smith soon identified the Falcon 20 as showing promise for his purposes, noting the availability of unsold aircraft due to an economic downturn and its atypically strong fuselage, the latter factor lending itself well to cargo operations.[19] Despite difficulties securing the necessary finances, the fledgling company was able to acquire several Falcon 20s and convert them for cargo operations.[20] Originally, Federal Express intended for its Falcon 20s to be delivered post-conversion, as a consequence of funding issues, the aircraft were acquired in handfuls and independently converted from their initial passenger-carrying configuration to support their use for cargo operations.[21] In September 1972, Federal Express established an in-house training school, focused on the preparation of ex-military pilots for commercial operations using the Falcon.[22]
In April 1973, Federal Express commenced its air express package delivery service using Falcon 20s out of its distribution centre in Memphis, Tennessee.[23] By its third year of operation, the airline had established a nationwide network using the Falcon 20 as its principal aircraft and had become profitable; as a consequence of rapidly increasing demands, it was recognised around this point that the introduction of larger cargo aircraft to supplement the type would soon be necessary in order to expand.[24] At the height of its use of the type, Federal Express operated a fleet of 33 Falcon 20s. The type was eventually withdrawn following is gradual replacement by substantially larger aircraft, the first of these being the Boeing 727-100.[25] The Falcon 20 which had carried the first Federal Express air express package has since been placed on static display at the Smithsonian's Udvar-Hazy Center at Dulles Airport.[26][27]
U.S. Coast Guard
[edit]
The United States Coast Guard (USCG) operated a model of the Falcon 20, designated as the HU-25 Guardian. The Guardian was operated as a high-speed spotter aircraft to locate shipwreck survivors and direct slower-moving aircraft and rescue vessels, and to interdict aerial and shipborne drug trafficking. In 1982, the first HU-25 was delivered to the USCG;[2] by December 1983, a total of 41 aircraft had been acquired. In USCG service, the HU-25 was eventually succeeded in its role by the EADS HC-144 Ocean Sentry, a newer turboprop-powered aircraft.[28][2]
Operationally, the HU-25 played a key role in the service's actitives in search and rescue, counter drug missions; it had also been a critical asset deployed during the 1991 Gulf War.[29] Initial models of the HU-25 were delivered to the HU-25A standard; a number were later modified to become HU-25Bs, which were equipped with sensors capable of detecting oil spills and other environmental pollutants.[2] Further numbers were re-configured to the HU-25C standard, for improved performance in the drug interdiction mission; when equipped with newer AN/APG-66(V)2 and AN/APS-143B(V)3 radar systems, these became the HU-25C+ and HU-25D respectively.[2] On 26 September 2014, following 32 years of service, the last operational HU-25 Falcon, the only jet ever to be a part of the operational air fleet of the US Coast Guard, was retired.[29] The high-speed capability it provided was lost with the type's retirement due to its replacements being considerably slower aircraft.[30]
Aerial testbeds
[edit]In 1988 the United States Coast Guard tested a Falcon 20C (tail-number N200GT) using Garrett TFE1042 afterburners. This required adding a titanium heat shield to the tail due to the engine mount position.[31][32][33]
In 1990, the United States Air Force acquired N20NY (cn 61), a Falcon 20C, for use as a testbed at MIT Lincoln Laboratory.[34] In 2006, the USAF also acquired Coast Guard HU-25A 2125, registered as N448TB (cn 439), for use at Lincoln Laboratory.[35] Sometime in the mid to late 2000s, N20NY was retired and donated to a local community college, with N448TB also being retired and donated to the same school in June, 2022.[36]
In 2011, NASA acquired a former Coast Guard HU-25C for use in Operation IceBridge. The aircraft, based at NASA's Langley Research Center in Hampton, Virginia, is equipped with a scanning laser altimeter to collect data on Arctic surface topography.[37]
During November 2012, a Falcon 20 became the first civil jet in the world to fly on 100 per cent biofuel when it performed a test flight for Canada's National Research Council.[38]
Variants
[edit]


- Mystère/Falcon 20
- Prototype, one built. F-WLKB, initially powered by two 14.68 kN (3,300 lbf) Pratt & Whitney JT12A-8 turbojet engines. Now stored at Musée Air et Espace Aéroport Paris – Le Bourget.
- Mystère/Falcon 20C
- Initial production version, with lengthened fuselage compared to first prototype and with 10–12 seats. Powered by 4,200 lbf (19 kN) CF700-2B engines.[39][40]
- Falcon 20CC (s/n 073)
- Modified Falcon 20C, with modifications for unpaved runway operations (larger wheels, low-pressure tyres, reinforced belly skin, and deleted main gear doors).
- Mystère/Falcon 20D
- Higher thrust engines (General Electric CF700-2D) and lower fuel consumption and more fuel capacity.
- Mystère/Falcon 20E
- Higher thrust engines (General Electric CF700-2D-2), higher zero fuel weight.
- Mystère/Falcon 20F
- Full leading-edge droop flaps and more fuel capacity.
- Falcon 20FH
- This was the original designation of the Falcon 200 prototype.
- Falcon 20G
- Maritime patrol and surveillance version, equipped with two Garrett AiResearch ATF3-6-2C turbofan engines.
- Falcon 20H
- This was the original designation of the Falcon 200.[41]
- Falcon 200
- Improved variant, powered by two 2360-kg (5,200-lb) Garrett ATF3-6A-4C turbofan engines and with more fuel. First flown on 30 April 1980.[41]
- Falcon ST
- This designation was given to two Falcon 20s used by the French Air Force as systems training aircraft. The aircraft were equipped with the combat radar and navigation systems of the Dassault Mirage IIIE.
- HU-25A Guardian
- United States Coast Guard version of the Falcon 20G. 41 built. Equipped with two Garrett AiResearch Garrett ATF3-6-2C turbofan engines.[42]
- HU-25B Guardian
- Pollution control version for the US Coast Guard equipped with side-looking airborne radar (SLAR) under fuselage. Seven converted from HU-25As.[43]
- HU-25C Guardian
- Drug interdiction version for the US Coast Guard, equipped with a Westinghouse APG-66 search radar and WF-360 Forward looking infrared turret. Nine HU-25As converted.[44]
- HU-25C+ Guardian
- Upgrade of HU-25C, with improved AN/APG-66(V)2 radar and new FLIR turret. All nine HU-25Cs converted.[45]
- HU-25D Guardian
- Upgraded HU-25A, with AN/APS-143B(V)3 Inverse synthetic aperture radar (ISAR) and same FLIR as HU-25C+. 15 upgraded.[46]
- Guardian 2
- Maritime patrol and surveillance version of the Falcon 200. Never put into production.
- CC-117
- Canadian military designation of Falcon 20C from 1970.
- Fan Jet Falcon
- The Falcon 20 was marketed in North America under this name.
- Falcon Cargo Jet (Falcon 20DC)
- Conversion of Falcon 20 to light cargo aircraft. 33 purchased/converted by Federal Express for overnight courier service.[47]
- Falcon 20C-5, 20D-5, 20E-5, 20F-5
- Falcon 20 aircraft equipped with Garrett TFE731-5AR-2C or TFE731-5BR-2C engines. Also includes adaptation of bleed air, anti-ice, hydraulic, fuel, electrical and engine control systems and installation of ATTCS (automatic takeoff thrust control system).
- Falcon 30
- Enlarged, 30-passenger commuter airliner derivative of Falcon 20, powered by two 27.0 kN (6,070 lbf) Lycoming ALF 502D turbofans. One prototype built, first flying on 11 May 1973. No further production of Falcon 30 or proposed 40-passenger, shorter-range Mystére 40-100.[48][49]
Operators
[edit]





Current civilian operators
[edit]- USA Jet Airlines
- Alliance Air Charter
- Kalitta Charters
- Ameristar Jet Charter
- IFL Group Inc.
- Sierra West Airlines
- Private
- Draken Europe (formerly FR Aviation/Cobham Limited)[50]
- Aerovision
- Service des avions français instrumentés pour la recherche en environnement
- Guardian Air
- FalconAir
Former civilian operators
[edit]- Imani Aviation (defunct charter company)
- Pan Am
- Grand Aire Express
- Phoenix Air
- Fedex Express
- Ameriflight/California Air Charter
Current military operators
[edit]- Imperial Iranian Air Force, later Islamic Republic of Iran Air Force as well as Islamic Republic of Iran Army Aviation
- Imperial Iranian Navy, later Islamic Republic of Iran Navy (Navy Aviation)
- Iranian Revolutionary Guards Corps
- Pakistan Air Force – 3 in service, including 2 DA-20s in EW, ECM, ESM roles
Former military operators
[edit]- Royal Australian Air Force – Three in service from 1967 to 1989.[51]
- Belgian Air Component – 2 Falcon 20E-5 operated from 1973 as VIP aircraft. Retired 22 December 2016.[52]
- Royal Canadian Air Force
- Canadian Forces
- 412 Transport Squadron and No. 414 Squadron RCAF 1970–1989 as CC-117
- Royal Jordanian Air Force
- Jordanian Royal Flight
- Libyan Air Force (Mirage Weapons Trainer)
- Oman Royal Flight
Specifications (Falcon 20F)
[edit]
Data from Janes's All The World's Aircraft 1980–81[55]
General characteristics
- Crew: 2
- Capacity: 8–14 passengers
- Length: 17.15 m (56 ft 3 in)
- Wingspan: 16.30 m (53 ft 6 in)
- Height: 5.32 m (17 ft 5 in)
- Wing area: 41.00 m2 (441.3 sq ft)
- Aspect ratio: 6.4:1
- Empty weight: 7,530 kg (16,601 lb)
- Max takeoff weight: 13,000 kg (28,660 lb)
- Fuel capacity: 5,200 L (1,100 imp gal; 1,400 US gal)
- Powerplant: 2 × General Electric CF700-2D-2 turbofans, 20 kN (4,500 lbf) thrust each
Performance
- Maximum speed: 862 km/h (536 mph, 465 kn) at 7,620 m (25,000 ft) (max cruise)
- Cruise speed: 750 km/h (470 mph, 400 kn) at 12,200 m (40,000 ft) (econ. cruise)
- Stall speed: 152 km/h (94 mph, 82 kn)
- Range: 3,350 km (2,080 mi, 1,810 nmi)
- Service ceiling: 12,800 m (42,000 ft) (absolute ceiling)
Popular culture
[edit]- The Mystère 20 prototype was also featured in the 1966 comedy How to Steal a Million, starring Audrey Hepburn and Peter O'Toole.[citation needed]
See also
[edit]Related development
Aircraft of comparable role, configuration, and era
Related lists
References
[edit]Citations
[edit]- ^ a b Murdo Morrison (12 October 2018). "NBAA: Business jet designs that changed the industry". FlightGlobal.
- ^ a b c d e Dorr 2015, p. 20.
- ^ a b c d e f g h i Block, Thomas H. "Foreign Accent: Two French Jets to Go." Flying, April 1973. Vol. 92, No. 4. ISSN 0015-4806. p. 20.
- ^ "Falcon 20: Je Suis Une Légende".
- ^ "FAA Type Certificate Data Sheet A7EU." Archived 15 November 2016 at the Wayback Machine Federal Aviation Administration, Retrieved: 26 June 2011.
- ^ "PW305s Ordered for Falcon 20 Upgrade." Flight International, 16–22 May 1990, Vol. 137, No. 4216. p. 19. Retrieved: 26 June 2011.
- ^ "Retrofit Partners v. Lucas Industries Inv." caselaw.findlaw.com, Retrieved: 26 June 2011.
- ^ McClennan 1987, pp. 31–32, 34.
- ^ a b c d e McClennan 1987, p. 34.
- ^ Michell 1994, p. 54.
- ^ McClennan 1987, pp. 31–32.
- ^ a b McClennan 1987, pp. 34–35.
- ^ McClennan 1987, pp. 32, 34.
- ^ McClennan 1987, pp. 34–36.
- ^ a b McClennan 1987, pp. 35–36.
- ^ McClennan 1987, p. 35.
- ^ "FAA STC SA5858SW Installation of wing pylons and underwing stores." Federal Aviation Administration, Retrieved: 3 July 2011.
- ^ Frock 2006, p. 45-46.
- ^ Frock 2006, p. 12.
- ^ Frock 2006, pp. 21, 93–96, 157–158.
- ^ Frock 2006, pp. 71–72, 158.
- ^ Frock 2006, p. 48.
- ^ Frock 2006, p. xi.
- ^ Frock 2006, pp. 159–160.
- ^ Frock 2006, pp. 160–162.
- ^ "Dassault Falcon 20." Archived 14 July 2014 at the Wayback Machine Smithsonian National Air and Space Museum. Retrieved: 13 July 2014.
- ^ Frock 2006, p. 215.
- ^ "HU-25: Guardian." Office of Aviation Forces (CG-711). Retrieved: 13 July 2014.
- ^ a b "Coast Guard jet's final landing place: The Oregon coast." Archived 28 December 2014 at the Wayback Machine kptv.com, Retrieved: 21 July 2017.
- ^ "The Coast Guard Bids A Sad Farewell To Their Last HU-25 Guardian Jet." Foxtrot Alpha, Retrieved: 21 July 2017.
- ^ "Photo's & Graphics". The Garrett AiResearch ATF3 Online Museum. Archived from the original on 17 May 2021. Retrieved 2 February 2021.
- ^ "The First and Only Business Jet with an Afterburner". Dark Footage. 23 July 2020. Archived from the original on 21 December 2021.
- ^ "Dassault Falcon 20/200" (PDF). World of Military Aviation. Archived from the original (PDF) on 8 February 2021. Retrieved 2 February 2021.
Manufacturers Serial Number: 137; Version: Dassault Falcon 20C; Serial Number: N200GT
- ^ FAA Registry for N20NY Archived 26 August 2014 at the Wayback Machine Retrieved 22 August 2014.
- ^ "FAA Registry for N448TB." Archived 26 August 2014 at the Wayback Machine Federal Aviation Administration, Retrieved: 22 August 2014.
- ^ "4Cs Aviation Program to Receive Donated Aircraft". 7 June 2022.
- ^ "NASA Langley Aircraft Joins Operation IceBridge." Archived 14 July 2014 at the Wayback Machine NASA Langley Research Center. Retrieved: 13 July 2014.
- ^ "NRC Flies World's First Civil Jet Powered by 100 Percent Biofuel". Aero-news Network. 7 November 2012. Retrieved 21 November 2012.
- ^ Taylor 1965, pp. 41–42
- ^ Simpson 1995, p. 167
- ^ a b Taylor 1988, pp. 73–74.
- ^ Kaminski 2007, p.108.
- ^ Kaminski 2007, p. 109.
- ^ Kaminski 2007, p. 110.
- ^ Kaminski 2007, pp. 110–111.
- ^ Kaminski 2007, pp. 111–112.
- ^ Taylor 1980, p.65.
- ^ Taylor 1974, pp. 65–66
- ^ "FALCON 30-40". Dassault Aviation. Retrieved 25 March 2023.
- ^ Donald, David. "Draken Buys Cobham's Falcon Fleet; ATAC Lands Eglin Deal". Aviation International News. Retrieved 8 April 2022.
- ^ Wilson, Stewart (1994). Military Aircraft of Australia. Weston Creek, Australia: Aerospace Publications. p. 216. ISBN 1875671080.
- ^ Gaudin, Gerard (February 2017). "Graceful Retirement". Air International. Vol. 92, no. 2. p. 17. ISSN 0306-5634.
- ^ "I dag tok dette flyet sin siste tur - blant annet over Stavanger". 30 September 2022.
- ^ "På hemmelige oppdrag verden rundt".
- ^ Taylor 1980, pp. 63–64.
Bibliography
[edit]- Chillon, Jacques; Dubois, Jean-Pierre & Wegg, John (1980). French Post-War Transport Aircraft. Tonbridge, UK: Air-Britain. ISBN 0-85130-078-2.
- Dorr, Robert F. (2015). 365 Aircraft You Must Fly. Voyageur Press. ISBN 978-0-7603-4763-8..
- Frock, Roger (2006). Changing How the World Does Business: Fedex's Incredible Journey to Success – The Inside Story. Birmingham, Alabama, USA: Berrett-Koehler Publishers. ISBN 1-5767-5880-X..
- Gates, Brian (1978). Falcon Mystere 20 Production History. Leicester, England: Midland Counties Publications. ISBN 0-904597-12-1.
- "HU-25 "Guardian" Medium Range Surveillance Aircraft". Aircraft and Cutters. U.S. Coast Guard. 16 February 2007. Archived from the original on 28 December 2006.
- Kaminski, Tom (2007). "Dassault HU-25: The Coast Guard's Guardian". International Air Power Review. Vol. 22. Westport, Connecticut, USA: AIRtime Publishing. pp. 102–115. ISBN 978-1-880588-79-6. ISSN 1473-9917.
- McClennan, J. Mac. (April 1987). "French Bred - Dassault Falcon 200: Not just a Pretty Face". Flying. Vol. 114, no. 4. pp. 30–36. ISSN 0015-4806.
- Simpson, R. W. (1995). Airlife's General Aviation (Second ed.). Shrewsbury, UK: Airlife Publishing Ltd. ISBN 1-85310-577-5.
- Michell, Simon (1994). Jane's Civil and Military Aircraft Upgrades 1994–95. Coulsdon, UK: Jane's Information Group. ISBN 0-7106-1208-7.
- Taylor, John W. R., ed. (1965). Jane's All the World's Aircraft 1965–66. New York: McGraw-Hill Book Company.
- Taylor, John W. R., ed. (1974). Jane's All the World's Aircraft 1974–75. New York: Frankin Watts Inc. ISBN 0-531-02747-3.
- Taylor, John W. R., ed. (1980). Jane's All The World's Aircraft 1980–81. London: Jane's Publishing. ISBN 0-7106-0705-9.
- Taylor, John W. R., ed. (1988). Jane's All The World's Aircraft 1988–89. Coulsdon, UK: Jane's Defence Data. ISBN 0-7106-0867-5.
- "Collections Prototypes: Dassault Mystère 20 01 F-WLKB Musée Air et Espace Aéroport Paris – Le Bourget". Dassault Mystère 20 01 F-WLKB. Musée Air et Espace Aéroport Paris – Le Bourget. 19 April 2010.
External links
[edit]Dassault Falcon 20
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Origins
Following the success of its post-war military aircraft, including the Mystère series of jet fighters, Dassault Aviation shifted attention toward civil applications in the late 1950s, seeking to leverage its expertise in high-performance aerodynamics for business aviation. By 1954, the company had initiated studies for a liaison aircraft that departed from its traditional twin-engine military designs, aiming to create a versatile executive transport. This effort culminated in a focused market analysis in late 1961, which identified a growing demand for a compact twin-engine business jet capable of seating 6 to 8 passengers with short-field performance and potential for extended range, including transatlantic capability, to serve Europe's emerging corporate travel needs.[1] Marcel Dassault, the firm's founder and chief designer, approved the project in December 1961, leading to the first conceptual sketches that year under the initial designation Mystère 20. The design team, drawing on experience from the Mystère IV fighter, emphasized a low-wing monoplane configuration with swept wings for efficiency at high subsonic speeds. Construction of the sole prototype began in early 1962 at the company's Mérignac facility near Bordeaux, incorporating advanced features like a T-tail and rear-mounted engines to optimize cabin space and reduce noise. The prototype was powered by Pratt & Whitney Canada JT12A-6/8 turbojets—each providing 3,300 lbf (14.7 kN) of thrust—for better suitability to business operations and availability. These were later replaced with General Electric CF700 turbofans for production models to improve efficiency and performance.[12][13] The prototype, registered F-WZSA, rolled out in April 1963 and took to the air for its maiden flight on May 4, 1963, from Mérignac airfield, piloted by chief test pilot René Bigand alongside co-pilot Jean Dillaire. The one-hour flight reached an altitude of 8,200 feet (2,500 meters) and a speed of 300 knots (555 km/h), confirming the aircraft's stable handling and performance potential. The initial flight test program, overseen by Bigand's team, rapidly expanded to evaluate aerodynamics, systems integration, and engine reliability, accumulating over 100 hours by the end of 1964 through more than 200 sorties that included high-speed dashes, stall tests, and simulated short-field operations. These early tests validated the design's transcontinental ambitions and paved the way for engine refinements, culminating in the adoption of General Electric CF700 turbofans for production models.[1][14]Certification and production
The certification process for the Dassault Mystère 20, later renamed the Falcon 20, culminated in French and U.S. type certification on June 9, 1965, following extensive testing that included nearly 600 flights totaling over 1,500 hours.[15] Key milestones encompassed a round-the-world proving tour, hot-weather trials in the Tunisian desert, and cold-weather evaluations in the Canadian winter to validate performance across diverse conditions.[16] The first production aircraft achieved its maiden flight on January 1, 1965, marking the transition from prototype to serial production.[4] Production commenced in 1964 at Dassault Aviation's facility in Mérignac, near Bordeaux, France, with assembly involving fuselages fabricated by Sud-Aviation.[17] A total of approximately 515 Falcon 20 and Falcon 200 aircraft were built between 1965 and 1988, establishing it as a cornerstone of the business jet market.[4] The initial equipped list price was approximately $1.3 million in 1965 dollars, reflecting its positioning as an accessible executive transport.[4] To enhance market appeal, particularly in the United States, the aircraft was rebranded from Mystère 20 to Falcon 20 at the behest of its launch customer, Pan American Business Jets, which took delivery of the first examples in the summer of 1965.[1] Early orders flowed from U.S. and European operators, with Pan Am securing a major contract for up to 160 units by 1968.[18] In 1966, the Falcon 20C variant was introduced, featuring upgraded General Electric CF700-2D engines for improved performance and reliability.[12]Design
Airframe
The Dassault Falcon 20 employs a low-wing monoplane configuration with swept wings featuring a 30° quarter-chord sweep angle and an aspect ratio of 6.4. The wings have a span of 16.3 m and incorporate leading-edge slats outboard of the wing fence along with two-segment single-slotted trailing-edge flaps inboard to enhance low-speed handling and lift generation.[12][1] The fuselage measures 17.15 m in length and utilizes semi-monocoque aluminum alloy construction designed with fail-safe principles to ensure structural redundancy and integrity under load. This all-metal airframe provides a robust foundation for the aircraft's pressurized environment and operational demands.[12][19] The empennage adopts a cruciform tail layout with a swept horizontal stabilizer mounted low on the rear fuselage for stability, complemented by a swept vertical fin and rudder. The aircraft is supported by a retractable tricycle landing gear arrangement with dual wheels on each unit, operated via hydraulic actuation for efficient ground handling and in-flight streamlining.[12][19][20] Cabin accommodations span 7.32 m in length and 1.87 m in width, offering a comfortable interior for up to 10 passengers. The structure is pressurized to a differential of 0.55 bar, maintaining an equivalent cabin altitude of 2,440 m during cruise at 12,200 m to ensure passenger comfort at high altitudes.[21][12][1] Key aerodynamic enhancements, such as the slotted flaps, contribute to the Falcon 20's short-field capabilities, enabling a balanced field takeoff length of 1,547 m under standard conditions at typical operating weights.[12][21]Powerplant and systems
The Dassault Falcon 20 is powered by two rear-mounted General Electric CF700 turbofan engines, with early production models utilizing the CF700-2C variant rated at 4,125 lbf (18.35 kN) of thrust each, while later models incorporated the more powerful CF700-2D-2 engines providing 4,500 lbf (20 kN) of thrust per engine.[22][4] Some aircraft underwent re-engining programs to install Garrett TFE731-5AR turbofans for improved efficiency and reduced noise, though the original CF700 configuration remains standard on most surviving examples.[23] Fuel is stored in integral wing tanks with a total capacity of 4,180 kg (9,210 lb), enabling efficient distribution via gravity feed and booster pumps to the engines.[1] The fuel system includes anti-icing provisions using engine bleed air for the nacelles and electric heating for the windshield, ensuring safe operation in icing conditions without tailplane or fin de-icing requirements due to the aircraft's design.[24] The avionics suite on initial Falcon 20s featured a basic but reliable setup with dual VHF communication radios, instrument landing system (ILS) for precision approaches, and weather radar for navigation support, complemented by optional inertial navigation systems for longer routes.[25] Hydraulic systems operate at 207 bar (3,000 psi) across two independent circuits—each driven by an engine-mounted pump and backed by an electric standby pump—powering flight controls, landing gear retraction, and brakes for redundancy in critical operations.[24] The electrical system is a 28 V DC setup supplied by two 300-amp starter-generators, one per engine, with battery backup for essential functions and an optional auxiliary power unit for ground operations.[24] Environmental controls include engine-bleed air pressurization maintaining a 7.8 psi differential for cabin comfort up to 41,000 ft, air conditioning via a bootstrap system, and a gaseous oxygen supply for emergency use.[24] Engine maintenance intervals for the CF700 series began with 600-hour overhauls in early service but were progressively extended through upgrades and improved materials, reaching up to 5,000 hours on the -2D-2 variant for enhanced operational economics.[26]Operational history
Civilian service
The Dassault Falcon 20 entered civilian service in the summer of 1965, with the first deliveries to Pan American World Airways (Pan Am) Business Jets Division, marking the aircraft's commercial debut as a pioneering business jet. Pan Am, acting as the exclusive U.S. distributor through a partnership with Dassault, initially ordered 40 aircraft with options for an additional 120, which facilitated rapid market penetration in North America. This arrangement, endorsed by aviation pioneer Charles Lindbergh, helped establish the Falcon 20 as a reliable option for executive transport, with the first production models quickly entering revenue service for short- to medium-range operations.[1] In business aviation, the Falcon 20 excelled as a versatile twin-engine jet, typically configured for 8 to 10 passengers in a pressurized cabin offering comfortable short-haul and transcontinental capabilities. With a range of approximately 3,300 km at typical cruise speeds, it enabled executives to cover key routes such as New York to Los Angeles or intra-European flights without refueling, emphasizing efficiency and speed in corporate travel. Its adoption surged in the late 1960s and early 1970s, as corporations recognized its low operating costs relative to larger airliners and its advanced features like rear-mounted engines for quieter cabins. By the early 1970s, the type had been integrated into numerous corporate fleets, contributing to the broader expansion of dedicated business aviation services.[22][4] Notable early civilian users included Pan Am for executive charters and, from 1973, Federal Express (now FedEx), which converted 33 Falcon 20s into freighters to launch its overnight package delivery network—the first all-cargo jet fleet for the company. The overall civilian fleet grew substantially, peaking at around 400 aircraft out of approximately 500 Falcon 20-series units produced between 1965 and 1988. This scale underscored the model's success in commercial and private sectors, where it served diverse roles from VIP transport to specialized cargo missions.[18][4] Retirement trends accelerated in the 2000s, driven by evolving noise abatement regulations like Stage 3 standards that challenged the older turbofan-equipped designs. Many operators retired their Falcon 20s in favor of quieter, more fuel-efficient successors, though some underwent hush-kit modifications to extend service. As of 2025, roughly 120 Falcon 20s remain active worldwide, predominantly in private ownership and niche cargo applications, reflecting the aircraft's enduring durability. The Falcon 20's legacy also includes its role in fostering the 1970s boom in corporate aviation, which laid groundwork for innovative ownership models and solidified Dassault's position in the business jet market.[9][4]Military service
The first military applications of the Dassault Falcon 20 emerged in 1967 when the French Air Force acquired several aircraft for use as testbeds and crew trainers, including adaptations for electronic countermeasures (ECM) and radar calibration missions.[27] These platforms supported systems training with combat avionics and navigation calibration, leveraging the jet's reliability for specialized defense roles.[12] In 1982, the United States Coast Guard introduced the HU-25 Guardian, a militarized Falcon 20 variant optimized for medium-range surveillance, with 41 units produced for search-and-rescue, law enforcement, and environmental monitoring operations.[28] Equipped with APS-127 surface search radar, forward-looking infrared (FLIR) systems, and in-flight rescue gear, the Guardian enabled rapid response over maritime areas, achieving over 500,000 total flight hours across its fleet.[29] The French Navy also operated the Falcon 20G Gardian for maritime patrol duties, conducting surveillance in overseas territories through the 1980s and into the early 2000s.[30] The Falcon 20 further served in aerial testbed roles for organizations like NASA, including engine development trials during the 1980s that logged hundreds of research flights to evaluate propulsion systems and flight dynamics.[31][32] Military Falcon 20 fleets underwent phased retirements, with most operators phasing out the type by the early 2010s; the U.S. Coast Guard decommissioned its final HU-25 in 2014, marking the end of the platform's active defense service.[33]Variants
Civil variants
The civil variants of the Dassault Falcon 20 were developed primarily for executive and corporate transport, emphasizing improvements in range, engine efficiency, and passenger comfort over the base design. These models evolved from the initial production version certified in 1964, incorporating turbofan engines for better fuel economy compared to earlier turbojet concepts tested in prototypes. Production of civil Falcon 20 series spanned from 1965 to the early 1980s, with a total of approximately 477 units built across sub-variants, focusing on reliability for short- to medium-haul operations.[12][4] The Falcon 20C served as the foundational civil model, entering service in December 1964 with two rear-mounted General Electric CF700-2C turbofan engines, each rated at 4,300 lbf (19.1 kN) of thrust. This variant featured a low-wing configuration with a swept wing and T-tail, accommodating 8 to 10 passengers in a pressurized cabin, and offered a typical range of 1,800 nautical miles (3,300 km) at Mach 0.8 cruise speed. A total of 118 Falcon 20C aircraft were produced between 1965 and 1966, establishing the type's reputation for transatlantic capability in the business jet segment.[12][34] Introduced in 1968, the Falcon 20D addressed demands for extended range through additional internal fuel tanks, increasing capacity to support flights up to 2,085 nautical miles (3,900 km), while retaining the CF700-2C engines of the 20C but with minor refinements for efficiency. This model maintained the 10-passenger layout but added provisions for optional auxiliary fuel in the baggage area, making it suitable for longer executive routes. Only 30 examples of the Falcon 20D were built, primarily for operators seeking greater nonstop capabilities without significant airframe changes.[12] The Falcon 20E was a variant with higher-thrust CF700-2D-2 engines and increased zero-fuel weight, but it did not enter full production. Instead, the Falcon 20F became the refined standard civil model starting in 1970, equipped with two CF700-2D-2 turbofans delivering 4,500 lbf (20.0 kN) thrust each, along with full-span leading-edge slats for enhanced low-speed performance and further fuel capacity expansion to 1,374 US gallons (5,200 liters). These upgrades improved short-field operations and climb rates, with the variant featuring a redesigned interior for better noise attenuation and optional high-speed cruise systems. With 198 units produced through the 1970s, the 20F emerged as the most prolific civil Falcon 20, widely adopted for its balance of speed, range exceeding 2,000 nautical miles, and operational versatility.[12][4] As production wound down, the Falcon 200 variant, certified in 1980 and built until 1984, marked a transitional upgrade with two Garrett AiResearch ATF3-6A-4C turbofans providing 5,200 lbf (23.1 kN) thrust each, higher maximum takeoff weight of 32,000 lb (14,515 kg), and modernized avionics including digital flight instruments. This model extended range to around 2,200 nautical miles while retaining the core airframe, serving as a bridge to the larger Falcon 50 trijet series. A total of 38 Falcon 200s were constructed, with many earlier 20C, 20D, and 20F aircraft later retrofitted to "-5" standards using Garrett TFE731-5 turbofans for similar performance gains and reduced maintenance costs.[12][35]Military variants
The Falcon 20G, also known as the Gardian in French service, was a maritime patrol and surveillance variant developed for the French Navy. In 1977, the French Navy ordered five aircraft based on the Falcon 20G airframe to replace aging Lockheed P-2H Neptune patrol planes, with deliveries occurring between 1983 and 1984. These aircraft were equipped with two Garrett ATF3-6 turbofan engines, providing improved performance over the original General Electric CF700 turbofans used in earlier Falcon 20 models, and featured a rear fuselage hatch for air-dropping rescue equipment and personnel. Design studies for a follow-on Gardian 2 variant explored electronic countermeasures (ECM) and surveillance capabilities, including jamming and signal intelligence systems, though only the base surveillance configuration entered service.[36] The United States Coast Guard's HU-25A Guardian was a dedicated search-and-rescue (SAR) and medium-range surveillance adaptation of the Falcon 20G, optimized for high-speed maritime operations. Between 1982 and 1984, 41 HU-25A aircraft were produced by Falcon Jet Corporation in Little Rock, Arkansas, powered by two Garrett ATF3-6-2C turbofan engines each delivering 5,440 lbf of thrust. Key modifications included an APS-127 search radar in a nose radome, a forward-looking infrared (FLIR) sensor for night operations, and an infrared/ultraviolet linescan system for detecting survivors at sea, enabling rapid response over extended ocean areas. The Guardian's Mach 0.85 cruise speed made it the fastest overwater SAR asset in U.S. service at the time.[29] Subsequent upgrades to the Guardian fleet addressed evolving missions, particularly drug interdiction. The HU-25B variant, with seven aircraft converted from HU-25As in the early 1990s, incorporated a side-looking airborne radar (SLAR) mounted under the fuselage for oil spill detection and environmental monitoring. The HU-25C, introduced in 1996 with nine conversions, featured an AN/APG-66(V)2 multimode radar, enhanced electro-optical/infrared (EO/IR) sensors, and an integrated tactical workstation to support law enforcement intercepts, improving target tracking and data fusion for coastal patrols. Further enhancements in the HU-25C+ and HU-25D configurations, applied to additional airframes through 2006, added satellite communications and signal data processors, with three HU-25Ds specifically reconfigured from HU-25As for advanced sensor integration. These upgrades extended the fleet's service until retirement in 2014.[29][37] Several Falcon 20s served as testbeds for propulsion and aerospace research. A modified Falcon 20 served as a testbed in 1988 for the Garrett TFE1042 afterburning turbofan—a military derivative of the TFE731—marking the only instance of afterburners on a business jet airframe. This configuration achieved successful flight tests to evaluate high-thrust performance and maneuverability.Operators
Civilian operators
As of 2025, approximately 120 Dassault Falcon 20 aircraft remain in active service worldwide, primarily in civilian roles such as cargo transport, charter operations, and research missions, though many have undergone conversions from their original passenger configurations.[9] Current civilian operators are concentrated in North America and Europe, with a focus on specialized cargo and training services. In the United States, IFL Group Inc. operates a fleet of Falcon 20 aircraft under Part 135 regulations for air taxi and cargo services.[38] Kalitta Charters maintains several converted Falcon 20s for charter cargo operations, including the acquisition of supplemental type certificates for further conversions.[39] Other U.S.-based entities, such as Alliance Air Charter and Ameristar Jet Charter, continue to utilize the type for on-demand charter flights.[40] In Europe, Draken Europe employs Falcon 20s for adversary air training services, supporting NATO and allied forces through commercial contracts.[41] Germany's Deutsches Zentrum für Luft- und Raumfahrt (DLR) operates a single Falcon 20E-5 (D-CMET) for atmospheric research as part of the EUropean Fleet for Airborne Research (EUFAR).[42] Post-2020 trends show increased emphasis on cargo conversions for the Falcon 20, driven by demand for efficient short-haul freight in e-commerce and logistics, with operators like Kalitta Charters expanding such modifications.[39] However, fleet reductions have occurred; for instance, USA Jet Airlines retired its entire Falcon 20 fleet in mid-2024 due to declining demand for small-package cargo services.[43] Former civilian operators include major airlines that pioneered the type's use in executive and cargo roles. Pan American World Airways ordered 40 Falcon 20s in the 1960s for its executive jet division, operating them until the 1980s before retirement amid fleet modernization.[4] Federal Express initially deployed 33 converted Falcon 20s (as Falcon 20DC) in 1973 for overnight courier services, marking the type's early adaptation to dedicated cargo use, though these were phased out by the 1990s.[7] In total, over the aircraft's service life since 1965, more than 500 Falcon 20s were produced, supporting hundreds of civilian entities globally before widespread retirements in favor of newer twinjets.[1] Regionally, Europe accounts for about 40% of active civilian Falcon 20s, driven by research and training applications, while North America holds around 30%, focused on cargo charters; activity in Asia and Africa has diminished due to aging airframes and regulatory retirements.[5]Military operators
The Dassault Falcon 20 served in military roles including VIP transport, maritime surveillance, electronic countermeasures (ECM), and flight testing, with around 120 units delivered to armed forces and government agencies globally.[44] Most operators have retired the type in favor of newer platforms, leaving only a handful active as of 2025, primarily with private contractors supporting military training exercises.[41]Current operators
- United Kingdom (via Draken Europe): Operates a fleet of Falcon 20s modified for ECM and adversary training ("Red Air") services to the Royal Air Force and NATO allies, based at Bournemouth and Teesside airports; the aircraft provide electronic warfare simulation and have been in use for over 30 years. 14 units remain active in this role as of 2025, supported by recent upgrades including the Joint Secure Air Combat Training System (JSAS).[41][45][46][47]
- Spain (via Draken Europe, on contract): Draken provides ECM training support to the Spanish Navy using Falcon 20s under a NATO contract awarded in 2023; the Spanish Air Force's own four Falcon 20ECM aircraft (T.11-1 to T.11-4) were retired around 2020-2024 and placed in storage at Torrejón air base.[48][49][50]
Former operators
- Belgium (Belgian Air Component): Operated two Falcon 20E-5 aircraft (CM-01 and CM-02) for VIP transport with 15 Wing at Melsbroek; both retired on December 22, 2016, after 43 years of service.[51][52]
- Canada (Royal Canadian Air Force): Acquired eight CC-117 Falcon 20C aircraft in 1967-1970 for VIP transport and electronic warfare training with 412 Transport Squadron and 414 Electronic Warfare Squadron; all retired between 1987 and 1989.[53]
- France (French Air Force and DGA): The Armée de l'Air used Falcon 20s for VIP transport starting in 1972 with Escadron de Transport 60 (ET 60); the flight test unit (DGA Essais en Vol) operated at least one for testing until its retirement on November 25, 2022. No active units remain in French military service as of 2025.[54][55]
- United States Coast Guard: Operated 41 HU-25 Guardian (Falcon 20G-based) aircraft from 1982 to 2014 for maritime surveillance, search and rescue, and law enforcement; all retired by September 23, 2014, with several preserved for museums (e.g., Tillamook Air Museum efforts in 2025) or transferred to NASA/USAF for research.[29][36][56]
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