Bell V-280 Valor

Last updated
V-280 Valor
Bell V-280 Valor high speed cruise demo, 2019 Alliance Air Show.jpg
A Bell V-280 in high-speed cruise configuration
Role Assault/utility tiltrotor
National originUnited States
Manufacturer Bell
First flight18 December 2017 [1]
StatusUnder development; flight testing

The Bell V-280 Valor is a tiltrotor aircraft being developed by Bell Helicopter for the United States Army's Future Vertical Lift (FVL) program. [2] The aircraft was officially unveiled at the 2013 Army Aviation Association of America's (AAAA) Annual Professional Forum and Exposition in Fort Worth, Texas. The V-280 made its first flight on 18 December 2017 in Amarillo, Texas. [3]

Contents

On 5 December 2022, the V-280 was chosen by the US Army as the winner of the Future Long-Range Assault Aircraft program to replace the Sikorsky UH-60 Black Hawk. [4] [5]

As of April 2024, limited user tests are planned for 2027 to 2028 with the first deployment expected in 2031. [6]

Development

In June 2013, Bell Helicopter announced that the V-280 Valor design had been selected by the US Army for the Joint Multi-Role (JMR) Technology Demonstrator (TD) phase. The JMR-TD phase is the technology demonstration precursor to Future Vertical Lift (FVL). The Army classified the offering as a Category I proposal, meaning it is a well-conceived, scientifically or technically sound proposal pertinent to program goals and objectives with applicability to Army mission needs, offered by a responsible contractor with the competent scientific and technical staff supporting resources required to achieve results. [7] JMR-TD contracts were expected to be awarded in September 2013, with flights scheduled for 2017. [8]

In September 2013, Bell announced it would partner with Lockheed Martin to develop the V-280. Lockheed will provide integrated avionics, sensors, and weapons to the aircraft. Additional partners were announced in the following months, [2] including Moog Inc. for the flight control systems, [9] GE Aviation for the engines, [10] [11] GKN for the tail structure, [12] Spirit AeroSystems for the composite fuselage, [13] Eaton Corporation as the distributor of hydraulics and power generation systems, [14] and Astronics Advanced Electric Systems to design and manufacture power distribution systems. [15] Israel Aerospace Industries, the first international partner recruited for the V-280, will supply the nacelle structures. Textron sister company TRU Simulation & Training will build a high-fidelity marketing simulator and desktop maintenance trainer. [16]

In October 2013, the U.S. Army awarded a technology investment agreement (TIA) to Bell for the V-280 Valor tiltrotor under the Joint Multi-Role program. [17] Awards were also given to AVX Aircraft, Karem Aircraft, and a Sikorsky-Boeing team. The JMR program is not intended to develop a prototype for the next family of vehicles, but to develop technologies and interfaces. The TIAs give the four teams nine months to complete preliminary design of their rotorcraft, which the Army will then review and authorize the construction of two competing demonstrators to fly in 2017. While there is a potential for an early downselect, the four teams are focused on the 2017 flight demonstrations. [18] [19] Each of the four teams received $6.5 million from the Army for phase I of the program, although Bell is investing an undisclosed amount of its own money. [20] On 21 October 2013, Bell unveiled the first full-scale mock-up of the V-280 Valor at Association of the United States Army 2013. [21]

On 11 August 2014, the Army informed the Bell-Lockheed team that they had chosen the V-280 Valor to continue with the JMR demonstration program. The Boeing-Sikorsky team offering the SB-1 Defiant was also chosen. [22] Announcement of the selections was officially made on 3 October 2014, and the teams began building technology demonstration aircraft for test flights in 2017. [23] Bell unveiled a full-scale mock-up of the V-280 Valor on the floor at AUSA 2014 to showcase the configuration and design of the high-speed platform. It is focused on the infantry squad and is to handle much like a helicopter in terms of low-speed agility to have unprecedented pitch, roll, and yaw response for those operations. Roughly the size of the current medium-lift helicopter, the V-280 is designed to travel twice as fast and twice as far. Bell is pitching these capabilities for movement over vast areas like the Pacific. The program director said the need for forward arming and refueling points could be eliminated and that one FOB (forward operating base) in the middle of a country, such as Afghanistan, could cover the entire country. [24]

Although Bell sold its share in the AW609 program in 2011, Bell continues to work on the AW609 and considers commercial potential for the V-280, as a military mass production of 2,000–4,000 aircraft could reduce unit cost to commercially acceptable levels. [25] [26] In 2016, Bell stated that it preferred the 609 for commercial use, and intended to offer the V-280 for military use only. Bell also stated that conventional helicopters were not part of Bell's military future. [27]

The Bell V-280 was chosen over the Sikorsky Defiant X on 5 December 2022. [5] Sikorsky filed a protest after losing the contract, [28] but the Government Accountability Office rejected it [29] on the grounds that Bell's submission was more advantageous in more areas while Sikorsky's information had too many deficiencies [30] and did not provide enough detail on how it would meet requirements. [31]

Prototype

A V-280 Valor prototype in flight at the Alliance Air Show, Fort Worth, Texas in October 2019 Bell V-280 Valor hover demo, 2019 Alliance Air Show.jpg
A V-280 Valor prototype in flight at the Alliance Air Show, Fort Worth, Texas in October 2019

In June 2015, Bell's subcontractor Spirit AeroSystems began assembly of the composite fuselage for the first prototype V-280 Valor, [32] which was delivered in September 2015. [33] In total, the design and manufacturing of the fuselage was completed in only 22 months. [34] Although the V-280 is initially planned for the JMR demonstration program, Bell does not anticipate much difference between it and a final FVL entry. [35] By January 2016, the V-280 demonstrator was 23 percent complete, [36] with the fuselage and wings mated together in early May 2016. [37] The demonstrator aircraft began ground vibration testing in Amarillo in February 2017, with the aircraft reaching 95 percent completion. [38]

The demonstrator was undergoing ground testing in October 2017. [39] [40] Bell released a video on 18 December showing the first flight with the area around the pivots blurred. [41] In April 2018, it ran for 75 hours on the ground and flew for 19 hours, up to 80 knots (90 mph; 150 km/h), before transiting to airplane flight by the end of the month. [42] By the end of the month, it attained 140 knots (160 mph; 260 km/h) with proprotors 60-deg. forward, and is planned to reach its airplane cruise configuration with horizontal pylons in summer. [43] It reached 190 knots (220 mph; 350 km/h) in cruise mode with horizontal propellers in May 2018. [44]

After 155 hours of rotor turn time and 70 flight hours, by October 2018 it had reached 250 knots (290 mph; 460 km/h) at 80% proprotor cruise speed. It was flown to a 45° bank angle at up to 200 knots (230 mph; 370 km/h), achieved a 4,500 ft/min (23 m/s) climb rate at 160 kn (180 mph; 300 km/h), exceeded 200 knots (230 mph; 370 km/h) with less than 50% torque, and recorded a peak load factor of 1.9 g. Its longest flight covered 370 mi (320 nmi; 600 km) as it performed a ferry flight to Arlington, Texas to continue testing closer to the US Army. [45]

After one year of flight tests, it reached its 280 knots (320 mph; 520 km/h) target by January 2019, as it will continue to expand its flight envelope: low-speed agility, bank angles, and autonomous operations. [46] In December 2020, the V-280 reached 305 knots (350 mph; 560 km/h) as it was flown for over 200 hours. [47] [48]

Design

A V-280 in flight with rotors tilted to hover configuration. Bell V-280 Valor takeoff demo, 2019 Alliance Air Show, Fort Worth, TX.jpg
A V-280 in flight with rotors tilted to hover configuration.

The V-280 is designed for a cruising speed of 280 knots (320 mph; 520 km/h), hence the name V-280. It has a top speed of 300 knots (345 mph; 556 km/h), a range of 2,100 nautical miles (2,400 mi; 3,900 km), and an effective combat range of 500 to 800 nmi (580 to 920 mi; 930 to 1,480 km). Expected maximum takeoff weight is around 30,000 pounds (14,000 kg). [49] One major difference from the earlier V-22 Osprey tiltrotor is that the engines remain in place while the rotors and drive shafts tilt. A driveshaft runs through the straight wing, allowing both prop rotors to be driven by a single engine in the event of engine loss. The V-280 will have retractable landing gear, a triple-redundant fly by wire control system, and a V-tail configuration.

The wings are made of a single section of carbon fiber reinforced polymer composite, reducing weight and production costs. The V-280 will have a crew of four and be capable of transporting up to 14 troops. Dual cargo hooks will give it a lift capacity to carry a 10,000 lb (4,500 kg) M777A2 Howitzer while flying at a speed of 150 knots (170 mph; 280 km/h). The fuselage is visually similar to that of the UH-60 Black Hawk medium lift helicopter. When landed, the wing is more than 7 ft (2.1 m) from the ground, allowing soldiers to egress easily out of two 6-foot (1.8 m) wide side doors and door gunners to have wide fields of fire.

Although the initial design is a utility configuration, Bell is also working on an attack configuration. [50] [51] [52] Whether different variants of the V-280 would fill utility and attack roles or a single airframe could interchange payloads for either mission, Bell is confident the Valor tiltrotor platform can fulfill both duties. The U.S. Marine Corps is interested in having one aircraft to replace utility and attack helicopters, but the Army, which leads the program, is not committed to the idea and wants distinct platforms for each mission. Bell and Lockheed claim an AV-280 variant can launch rockets, missiles, and even small unmanned aerial vehicles forward or aft with no rotor interference, even in forward flight and cruise modes with the rotors forward. [35]

The V-280 prototype (air vehicle concept demonstrator, or AVCD) was powered by the General Electric T64. [53] The specific engine for the model performance specification (MPS) was unknown at the time, but has funding from the Army's future affordable turbine engine (FATE) program. [10] The V-tail structure and ruddervators, made by GKN, will provide high levels of maneuverability and control to the airframe. It will be made of a combination of metals and composites. [12] Features in the interior include seats that wirelessly charge troops’ radios, night-vision goggles, and other electronic gear and windows that display three-dimensional mission maps. [54]

Special emphasis has been placed on reducing the weight of the V-280 in comparison to the V-22, which would reduce cost. To do this, composites are used extensively in the wing, fuselage, and tail. Wing skins and ribs are made of a honeycomb-stiffened "sandwich" construction with large-cell carbon cores for fewer, larger, and lighter parts. Skins and ribs are paste-bonded together to eliminate fasteners. With these measures, costs are reduced by over 30 percent compared to a scaled V-22 wing. [53] Bell expects the V-280 to cost around the same as an AH-64E or MH-60M. [55] While the Osprey has a higher disk loading and lower hover efficiency than a helicopter, the V-280 will have a lower disk loading and longer wing for greater hover and cruise efficiency. [16]

In October 2021, Bell and Rolls-Royce jointly announced that the V-280 Valor powerplant would switch from the T64 turboshaft used on the prototype to a derivative of the Rolls-Royce T406/AE 1107C used on the Osprey, which would be named the AE 1107F. At the same time as increasing power from 5,000 to 7,000 horsepower, the AE 1107 is a known element in tiltrotor aircraft with its two decades of prior use, which lowers sustainment costs and decreases risks of the project. [56]

Specifications

Data from bellflight.com, [57] [ better source needed ]

General characteristics

Performance

See also

Related development

Aircraft of comparable role, configuration, and era

Related Research Articles

<span class="mw-page-title-main">Tiltrotor</span> Aircraft type

A tiltrotor is an aircraft that generates lift and propulsion by way of one or more powered rotors mounted on rotating shafts or nacelles usually at the ends of a fixed wing. Almost all tiltrotors use a transverse rotor design, with a few exceptions that use other multirotor layouts.

<span class="mw-page-title-main">Bell Textron</span> Aerospace manufacturer in the United States

Bell Textron Inc. is an American aerospace manufacturer headquartered in Fort Worth, Texas. A subsidiary of Textron, Bell manufactures military rotorcraft at facilities in Fort Worth, and Amarillo, Texas, United States as well as commercial helicopters in Mirabel, Quebec, Canada.

<span class="mw-page-title-main">Bell XV-15</span> American experimental tiltrotor aircraft

The Bell XV-15 is an American tiltrotor VTOL aircraft. It was the second successful experimental tiltrotor aircraft and the first to demonstrate the concept's high speed performance relative to conventional helicopters.

<span class="mw-page-title-main">Leonardo AW609</span> Twin-engine tiltrotor VTOL aircraft

The Leonardo AW609, formerly the AgustaWestland AW609, and originally the Bell-Agusta BA609, is a twin-engined tiltrotor VTOL aircraft with an overall configuration similar to that of the Bell Boeing V-22 Osprey. It is capable of landing vertically like a helicopter while having a range and speed in excess of conventional rotorcraft. The AW609 is aimed at the civil aviation market, in particular VIP customers and offshore oil and gas operators. It has progressed from a concept in the late 1990s, to development and testing, and is working towards certification in the 2020s.

<span class="mw-page-title-main">Piasecki X-49 SpeedHawk</span> Type of aircraft

The Piasecki X-49 "SpeedHawk" is an American four-bladed, twin-engined experimental high-speed compound helicopter developed by Piasecki Aircraft. The X-49A is based on the airframe of a Sikorsky YSH-60F Seahawk, but utilizes Piasecki's proprietary vectored thrust ducted propeller (VTDP) design and includes the addition of lifting wings. The concept of the experimental program was to apply the VTDP technology to a production military helicopter to determine any benefit gained through increases in performance or useful load.

<span class="mw-page-title-main">Lockheed AH-56 Cheyenne</span> Canceled US helicopter program

The Lockheed AH-56 Cheyenne is an attack helicopter developed by Lockheed for the United States Army. It rose from the Army's Advanced Aerial Fire Support System (AAFSS) program to field the service's first dedicated attack helicopter. Lockheed designed the Cheyenne using a four-blade rigid-rotor system and configured the aircraft as a compound helicopter with low-mounted wings and a tail-mounted thrusting propeller driven by a General Electric T64 turboshaft engine. The Cheyenne was to have a high-speed dash capability to provide armed escort for the Army's transport helicopters, such as the Bell UH-1 Iroquois.

<span class="mw-page-title-main">Bell XV-3</span> Experimental tiltrotor aircraft to explore convertiplane technologies

The Bell XV-3 is an American tiltrotor aircraft developed by Bell Helicopter for a joint research program between the United States Air Force and the United States Army in order to explore convertiplane technologies. The XV-3 featured an engine mounted in the fuselage with driveshafts transferring power to two-bladed rotor assemblies mounted on the wingtips. The wingtip rotor assemblies were mounted to tilt 90 degrees from vertical to horizontal, designed to allow the XV-3 to take off and land like a helicopter but fly at faster airspeeds, similar to a conventional fixed-wing aircraft.

<span class="mw-page-title-main">Bell 533</span> Research helicopter built by Bell Helicopter

The Bell 533 was a research helicopter built by Bell Helicopter under contract with the United States Army during the 1960s, to explore the limits and conditions experienced by helicopter rotors at high airspeeds. The helicopter was a YH-40—a preproduction version of the UH-1 Iroquois—modified and tested in several helicopter and compound helicopter configurations. The Bell 533 was referred to as the High Performance Helicopter (HPH) by the Army, and reached a top speed of 274.6 knots in 1969, before being retired.

<span class="mw-page-title-main">Sikorsky X2</span> Experimental high-speed compound helicopter

The Sikorsky X2 is an experimental high-speed compound helicopter with coaxial rotors, developed by Sikorsky Aircraft, that made its first flight in 2008 and was officially retired in 2011.

<span class="mw-page-title-main">Bell Boeing Quad TiltRotor</span> Proposed four-rotor derivative of the V-22 Osprey

The Bell Boeing Quad TiltRotor (QTR) is a proposed four-rotor derivative of the Bell Boeing V-22 Osprey developed jointly by Bell Helicopter and Boeing. The concept is a contender in the U.S. Army's Joint Heavy Lift program. It would have a cargo capacity roughly equivalent to the C-130 Hercules, cruise at 250 knots, and land at unimproved sites vertically like a helicopter.

<span class="mw-page-title-main">Eurocopter X³</span> Type of aircraft

The Eurocopter X³(X-Cubed) is a retired experimental high-speed compound helicopter developed by Airbus Helicopters. A technology demonstration platform for "high-speed, long-range hybrid helicopter" or H³ concept, the X³ achieved 255 knots in level flight on 7 June 2013, setting an unofficial helicopter speed record. In June 2014, it was placed in a French air museum in the village of Saint-Victoret.

<span class="mw-page-title-main">Sikorsky S-97 Raider</span> American high-speed scout and attack compound helicopter

The Sikorsky S-97 Raider is a high-speed scout and attack compound helicopter based on the Advancing Blade Concept (ABC) with a coaxial rotor system under development by Sikorsky Aircraft. Sikorsky planned to offer it for the United States Army's Armed Aerial Scout program, along with other possible uses. The S-97 made its maiden flight on 22 May 2015.

<span class="mw-page-title-main">Future Vertical Lift</span> Planned family of US military helicopters

Future Vertical Lift (FVL) is a plan to develop a family of military helicopters for the United States Armed Forces. Five different sizes of aircraft are to be developed, sharing common hardware such as sensors, avionics, engines, and countermeasures. The U.S. Army has been considering the program since 2004. FVL is meant to develop replacements for the Army's UH-60 Black Hawk, AH-64 Apache, CH-47 Chinook, and OH-58 Kiowa helicopters. The precursor for FVL is the Joint Multi-Role (JMR) helicopter program.

<span class="mw-page-title-main">VTOL X-Plane</span> American experimental aircraft

The Vertical Take-Off and Landing Experimental Aircraft program was an American research project sponsored by the Defense Advanced Research Projects Agency (DARPA). The goal of the program was to demonstrate a VTOL aircraft design that can take off vertically and efficiently hover, while flying faster than conventional rotorcraft. There have been many previous attempts, most of them unsuccessful as of 2015.

<span class="mw-page-title-main">Sikorsky–Boeing SB-1 Defiant</span> Entry for the United States Armys Future Vertical Lift program

The Sikorsky–Boeing SB-1 Defiant was the Sikorsky Aircraft and Boeing entry for the United States Army's Future Long-Range Assault Aircraft program to replace the Sikorsky UH-60 Black Hawk. It is a compound helicopter with rigid coaxial rotors, powered by two Honeywell T55 turboshaft engines; it first flew on 21 March 2019.

<span class="mw-page-title-main">Bell V-247 Vigilant</span> Unmanned military tiltrotor concept

The Bell V-247 Vigilant is a concept by Bell Helicopter to develop a large tiltrotor unmanned aerial vehicle.

The Bell 360 Invictus was a proposed helicopter design intended to meet the United States Army requirement for a Future Attack Reconnaissance Aircraft (FARA). It is based on technology from the Bell 525 Relentless.

The Future Attack Reconnaissance Aircraft (FARA) program was initiated by the United States Army in 2018 to develop a successor to the Bell OH-58 Kiowa scout helicopter as part of the Future Vertical Lift program. The OH-58 was retired in 2017; three prior programs for a successor were cancelled prior to reaching production: Light Helicopter Experimental, Armed Reconnaissance Helicopter, and Armed Aerial Scout. Several billions of dollars were spent without delivering any new helicopters to service, due to this cycle of development and cancellation. During this time the armed scout role was filled primarily by the Vietnam-era OH-58, which was finally retired in the late 2010s, leaving the Army to use attack helicopters to fill in this role.

The Future Long-Range Assault Aircraft (FLRAA) program was initiated by the United States Army in 2019 to develop a successor to the Sikorsky UH-60 Black Hawk utility helicopter as part of the Future Vertical Lift program. The UH-60, developed in the early 1970s, has been in service since June 1979. Like the UH-60, FLRAA variants would also serve United States Special Operations Command and the United States Marine Corps. Under the existing Joint Multi-Role Technology Demonstrator (JMR-TD) program, the Army has been gathering data from flying prototype designs that could fill the FLRAA role.

The Sikorsky Raider X is a compound helicopter concept with two coaxial rotors and a single pusher propeller, designed by the Sikorsky Aircraft division of Lockheed Martin for the United States Army Future Attack Reconnaissance Aircraft (FARA) program. The Raider X concept was announced in October 2019. In March 2020, the Army selected the Raider X and the Bell 360 Invictus from a field of five design concept candidates. The Raider X and 360 Invictus concepts were to be built as flying prototypes for a competition scheduled for 2023. The FARA program was cancelled in 2024.

References

  1. ↑ Judson, Jen (20 December 2017). "V-280 Valor flies for the first time". Defense News. Archived from the original on 21 December 2017.
  2. 1 2 "Bell Helicopter and Lockheed Martin Team on V-280 Valor". Textron. 9 September 2013. Archived from the original on 18 September 2023.
  3. ↑ "Bell V-280 Valor Achieves First Flight". Bell Flight. 18 December 2017. Archived from the original on 29 March 2023.
  4. ↑ Capaccio, Anthony; Tiron, Roxana (5 December 2022). "US Army Taps Bell Textron for Helicopter of the Future". Bloomberg.com. Archived from the original on 3 March 2023. Retrieved 5 December 2022.
  5. 1 2 Weisgerber, Marcus (5 December 2022). "Army Chooses Bell V-280 to Replace Its Black Hawk Helicopters". Defense One. Archived from the original on 3 October 2023. Retrieved 5 December 2022.
  6. ↑ Judson, Jen (2024-04-25). "US Army to field long-range combat aircraft to first unit in FY31". Defense News. Retrieved 2024-06-09.
  7. ↑ Drwiega, Andrew. "The Generation Game" Air International January 2014, p. 106. Accessed: 17 June 2014.
  8. ↑ "Bell V-280 Valor™ Selected for Army's JMR-TD Program". Textron. 5 June 2013. Archived from the original on 19 September 2023. Retrieved 10 January 2024.
  9. ↑ "Moog to Design, Manufacture Flight Control System for Bell V-280 Valor™". Textron. 9 October 2013. Archived from the original on 18 September 2023.
  10. 1 2 Hemmerdinger, Jon (16 October 2013). "Bell switches engine supplier for next tiltrotor, chooses GE". FlightGlobal. Archived from the original on 22 September 2020.
  11. ↑ Weisgerber, Marcus (7 October 2021). "Bell Picks Rolls-Royce Engine for V-280 Valor in Army Black Hawk Replacement Contest". Defense One. Archived from the original on 7 October 2021.
  12. 1 2 "GKN Aerospace to develop V-Tail for Bell V-280 Valor". GKN Aerospace. 17 October 2013. Archived from the original on 7 March 2016.
  13. ↑ Hemmerdinger, Jon (21 October 2013). "Spirit AeroSystems to build V-280 fuselage". FlightGlobal. Archived from the original on 9 August 2020.
  14. ↑ "Bell Helicopter, Eaton Announce Cooperative Agreement". Textron. 5 May 2014. Archived from the original on 14 September 2023.
  15. ↑ "Bell Helicopter, Astronics Announce Cooperative Agreement". Textron. 5 May 2014. Archived from the original on 14 September 2023.
  16. 1 2 Carey, Bill (15 October 2014). "Industry Teams Tout Rotorcraft Designs for U.S. Army Demo | AIN". Aviation International News. Archived from the original on 11 October 2023. Retrieved 10 January 2024.
  17. ↑ "Army Awards JMR-TD Program Technology Investment Agreement with Bell Helicopter for Next-Generation Tiltrotor Demonstrator". Textron. 8 October 2013. Archived from the original on 18 September 2023. Retrieved 10 January 2024.
  18. ↑ Warwick, Graham (2 October 2013). "Karem Unveils Variable-Speed Tiltrotor For U.S. Army JMR Demo". Aviation Week. Archived from the original on 5 October 2013.
  19. ↑ Rosenberg, Zach (3 October 2013). "Army selects four companies for advanced rotorcraft concepts" . FlightGlobal. Archived from the original on 14 June 2020.
  20. ↑ "Doubts Swirl around Army's Next Generation Helicopter Fleet". military.com. 25 October 2013. Archived from the original on 4 August 2020. Retrieved 10 January 2024.
  21. ↑ Hemmerdinger, Jon (21 October 2013). "Bell unveils V-280 Valor mock-up". FlightGlobal. Archived from the original on 30 October 2020.
  22. ↑ McGarry, Brendan (12 August 2014). "Army Picks Firms to Build Future Helicopter". DoDBuzz. Archived from the original on 22 October 2017.
  23. ↑ Majumdar, Dave (3 October 2014). "U.S. Army Selects Bell and Sikorsky/Boeing to Build Prototypes for Next Generation Helicopter Program". U.S. Naval Institute. Archived from the original on 25 March 2023.
  24. ↑ "Bell Touts New Tilt-Rotor High-Speed Helicopter". military.com. 14 October 2014. Archived from the original on 4 August 2020.
  25. ↑ Black, Thomas (18 September 2015). "Plane or Copter? Tilt-Rotor May Mix Both in Civil Use". Bloomberg. Archived from the original on 20 July 2016.
  26. ↑ Jaggi, Rohit (20 October 2014). "Helicopter market eyes civilian tilt-rotor models". Financial Times. Archived from the original on October 24, 2014. We're talking 2–4,000 aircraft
  27. ↑ Drew, James (29 February 2016). "HELI-EXPO: Bell rules out future conventional military helicopter developments". FlightGlobal. Archived from the original on 8 November 2020. Retrieved 17 September 2023.
  28. ↑ Judson, Jen (28 December 2022). "Sikorsky challenges US Army's helicopter award". Defense News. Archived from the original on 10 January 2024. Retrieved 7 April 2023.
  29. ↑ Judson, Jen (6 April 2023). "Lockheed unit loses protest of Army tiltrotor award to Textron's Bell". Defense News. Archived from the original on 10 January 2024. Retrieved 7 April 2023.
  30. ↑ Roque, Ashley (14 April 2023). "Sikorsky-Boeing's FLRAA bid was much cheaper, but couldn't offset 'unacceptable' design metric: GAO". Breaking Defense. Archived from the original on 16 May 2023.
  31. ↑ Judson, Jen (2 May 2023). "US Army says open system requirements clear for next-gen helicopter". Defense News. Archived from the original on 10 January 2024.
  32. ↑ Whittle, Richard (19 June 2015). "V-280 Valor: Bell Starts Building Joint Multi-Role Prototype". Breaking Defense. Archived from the original on 11 November 2022.
  33. ↑ Siebenmark, Jerry (23 September 2015). "Spirit delivers first V-280 tiltrotor aircraft fuselage to Bell (+ video)". kansas. Archived from the original on 23 September 2015.
  34. ↑ "Spirit AeroSystems used HyperSizer software for V-280 Valor program". Composites World. 21 December 2015. Archived from the original on 30 December 2018.
  35. 1 2 Drew, James (2 July 2015). "Bell sees V-280 Valor as common attack-utility platform". FlightGlobal. Archived from the original on 6 June 2020.
  36. ↑ Drew, James (20 January 2016). "Bell preparing to affix V-280 wing as 'Valor' takes shape". FlightGlobal. Archived from the original on 29 May 2022.
  37. ↑ Trimble, Stephen (4 May 2016). "Bell Helicopter mates fuselage and wings of first V-280". FlightGlobal. Archived from the original on 10 January 2024.
  38. ↑ Johnson, Oliver (16 February 2017). "V-280 Valor begins ground vibration testing". Vertical Mag. Archived from the original on 22 March 2017.
  39. ↑ "Photo of Experimental (piston-single) (N280BH)". Flight Aware. 18 October 2017. Archived from the original on 24 October 2017. Retrieved 17 September 2023.
  40. ↑ James, Drew (3 October 2017). "Bell V-280 Ready For First Flight" . Aviation Week & Space Technology. Archived from the original on 8 January 2023.
  41. ↑ "Bell V-280 Valor achieves first flight". Vertical Mag. 18 December 2017. Archived from the original on 8 January 2023. Retrieved 17 September 2023.
  42. ↑ DiMascio, Jen (9 April 2018). "Bell's V-280 To Fly Like Aircraft" . Aviation Week Network. Archived from the original on 8 January 2023.
  43. ↑ Drew, James (26 April 2018). "Bell V-280 Passes 140 Kt. On Way To 'Cruise Mode'" . Aviation Week Network. Archived from the original on 27 February 2021.
  44. ↑ Reim, Garrett (16 May 2018). "Bell Helicopter V-280 tilts rotors to cruise mode 16 MAY, 2018". FlightGlobal. Archived from the original on 17 October 2021.
  45. ↑ "Bell V-280 Valor – First Year of Flight". Bell Press Release. 18 December 2018. Archived from the original on 1 October 2023.
  46. ↑ Perry, Dominic (25 January 2019). "Bell V-280 hits 280kt speed goal". FlightGlobal. Archived from the original on 19 September 2020.
  47. ↑ Freedberg Jr, Sydney J. (25 January 2021). "Defiant-X: Sikorsky, Boeing Unveil FLRAA Design". Breaking Defense. Archived from the original on 8 January 2023.
  48. ↑ "Bell V-280 Tilt Rotor Aircraft Flies Demonstration". YouTube. The Dallas Morning News. 26 October 2018. Retrieved 29 January 2020.
  49. ↑ Huber, Mark (3 August 2014). "Bell Applying 525 Technology to V-280". Aviation International News. Archived from the original on 11 October 2023. Retrieved 4 August 2014.
  50. ↑ Majumdar, Dave (10 April 2014). "PICTURES: Bell unveils V-280 Valor". FlightGlobal. Archived from the original on 25 February 2020.
  51. ↑ Quick, Darren (18 April 2013). "Bell unveils V-280 Valor tiltrotor concept for U.S. Army program". Aerospace Blog. Archived from the original on 8 January 2023.
  52. ↑ Gourley, Scott R. (23 May 2013). "Bell V-280 Valor Spotlighted at SOFIC". Defense Media Network. Archived from the original on 8 January 2023.
  53. 1 2 Warwick, Graham (25 August 2014). "Affordability Challenge In Pursuit Of Army JMR/FVL" . Aviation Week. Archived from the original on 9 May 2021. Retrieved 26 August 2014.
  54. ↑ "Army May Pick Future Helo Designs This Summer". military.com. 5 May 2014. Archived from the original on 4 August 2020.
  55. ↑ Trimble, Stephen (23 September 2015). "V-280 fuselage delivery highlights focus on cost". FlightGlobal. Archived from the original on 6 January 2020.
  56. ↑ Weisgerber, Marcus (7 October 2021). "Bell Picks Rolls-Royce Engine for V-280 Valor in Army Black Hawk Replacement Contest". Defense One. Archived from the original on 23 September 2023.
  57. ↑ "Bell V280 Valor". Bell Flight. Archived from the original on 3 October 2023. Retrieved 18 April 2018.
  58. ↑ "Proven Power for the FLRAA". Rolls Royce. Archived from the original on 3 July 2023. Retrieved 6 December 2022.
  59. ↑ "JMR Bell-Vertiflite" (PDF). vtol.org. Archived (PDF) from the original on 12 January 2023.
External images
Searchtool.svg Bell V-280 image gallery
Searchtool.svg Mock-up photos by American Helicopter Society
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.