sikorsky counter rotating helicoptersikorsky counter rotating helicopter

A trade-off study was proposed on the question of three versus four-bladed rotors. SpaceX astronaut missions for NASA: Crew-6 updates, Interview with Bernard Harris, the 1st African-American spacewalker, Watch SpaceX launch 2 rockets less than an hour apart on Monday, Your monthly guide to stargazing & space science, Subscribe today and save an extra 5% with code 'LOVE5', Issues delivered straight to your door or device. Although the X2 is headed out to pasture, some of its technology will be used in Sikorsky's next helicopter, the S-97 Raider. In a more developed design, a single propulsion system would power both the rotor and an auxiliary propulsion propeller or ducted fan. But how? NY 10036. The ' Sikorsky Aircraft is currently added mechanical challenge of the two I ABC required the spar to be tapered in both diameter and wall thickness to be able to carry the high bending moments developed when the rotors lift moved off the rotor centerline. of rotating blades on top of the fuselage and shorterblades mounted on the side of the tail that spin in a plane roughlyperpendicular to the main disc. Nelson Hyde Chick - this will likely be used for more then just war. The new heavy lifter will allow the U.S. Marine Corps and international militaries to move troops and equipment from ship to shore, and to higher altitude terrain, more quickly and effectively than ever before. So which systems better? Designs were prepared for the rotor, drive system, and controls, and preliminary designs of mission aircraft were studied. The aircraft build is 90-percent complete, says Pete Germanowski, the chief engineer on the FARA program at Sikorsky. Why not a similar size quadcopter design (similar to drones)? Igor Sikorsky continued working on helicopter design and production for the rest of his life, preferring to emphasize non-military applications and gaining most satisfaction from the unique suitability of helicopters to reach difficult areas on rescue and mercy missions. The aircraft continues tomake progress toward its first flight, said Peter Grant, Sikorsky's senior managerof Advanced Programs. That's in an assault configuration; there will also be an attack variant that shares a common fly-by-wire drivetrain and many other systems, but has a different composite fuselage and is much more heavily armed. Two three-blade intermeshing contra-rotating tandem rotors, fully-articulated, all bearings submerged in oil. Where a standard helicopter uses a side-facing tail rotor to offset the torque of the main rotor in front, the pusher propeller of the S-97 will assist in high-speed acceleration and deceleration. Additionally, with the stiff rotors and lack of a tail rotor, the ABC was thought by pilots to be an improvement over conventional helicopters in low speed flight. Sikorsky has released new shots of its Raider X prototype aircraft sporting modular weapon launchers loaded with Hellfire missiles and a 20mm main gun. American Helicopter Society paper Fifty Years of Sikorsky High Speed Concepts, Arthur W. Linden. It became apparent that the biggest challenge was going to be the construction of the rotor blades. However, in 2011, the company laid off 400 employees at the Hawk Works plant and 570 more in 2012. Born in Kiev, Ukraine, in 1889 to a family of physicians, Igor Sikorsky actually built his first helicopter at the age of 12. A 40 ft. diameter test rotor was fabricated in 1970 and tested in the NASA Ames 40 x 80 ft. wind tunnel. Both Sikorsky and Bell might see their FARA competitive prototypes fly for the first time next year. TheCH-53K King Stallionadvances Sikorskys 50 years of manufacturing and operational success with its CH-53A, CH-53D/G, and CH-53E predecessors. Sikorsky and Boeing have been working on this high-speed, long-range, ultra-maneuverable military helicopter design for some time, and now they've released the first photos of what is expected to become a highly effective US Army utility helicopter sometime in the 2030s. The aircraft was designed to fly with or without the auxiliary propulsion J-60s installed. is their ability to take off and land vertically.However, compared with fixed-wing aircraft, they are slow. Airwolf would still eat it for breakfast. - Box 9729Stratford, Connecticut 06497-9129U.S.A. The Marine Corps is more than receptive to radically new rotorcraft. Built in Connecticut, the Sikorsky CH-53K is the latest in the Companys proud helicopter legacy. systems are either fully-articulated or rigid. This successful R&D program demonstrated the promised speed and altitude performance. The CH-53K Test Flight team has our most experienced and seasoned engineers, pilots, maintainers and support staff. When vertical, they act like giant propellers, allowing fast and fuel-efficient flight with no risk of retreating blade stall (because of the angle at which they meet the air). Photo: Sikorsky Aircraft Corp. To paraphrase helicopter pioneer Igor Sikorsky: If you're in trouble . Registration or use of this site constitutes acceptance of our Terms of Service and Privacy Policy. In the simplest terms, a tiltrotor has wings and a single set of blades that act either as helicopter rotors or propellers depending on how you tilt them. He also has a Masters Degree in Comparative Literature from Columbia University. With this rotor configuration, the rotors capability to generate lift would not drop off with speed, or with altitude. The spar tubes were then hot formed into an elliptical shape, while twisted, in ceramic hot-forming dies. Another huge measure of potential stealth for the aircraft likely resides in its ability to manage aheat signatureas well, something about which there may be little information available. The Drive reports that that FLRAA decision could happen in September. In September 2010, Sikorsky's similarly designed X2 technology demonstrator reached a speed of 250 knots (287 mph), a feat that the longtime rotorcraft maker at the time said "unofficially shattered the helicopter world speed record." But the mission is not simply to fly long distances. They were refined in the S-97 Raider and now the SB>1. The XH-59A proved the basic advancing blade concept, achieving a level flight speed of 240 knots without the use of a wing, a feat never before accomplished by the helicopter industry. With faster speeds, you get less lift capacity unless you want to pay more. In another image, below, additional 3D-printed components protrude out of the weapons bay, which is open. collectivelycalled "X2 Technology" ?that would significantly change helicopter flight. They will likely sell it in the commercial market as well. The Sikorsky-Boeing SB-1 Defiant concept for the Joint Multi-Role demonstrator, a predecessor to the Future Vertical Lift aircraft. When you purchase through links on our site, we may earn an affiliate commission. Sikorskys production rotor blades at that time had spars made from constant-section extruded aluminum. The first flight for that program is expected in 2017. The aircraft, which will feature fly-by-wire controls, will be able to carry a variety of external weapons and sensors to suit missions including light assault or armed aerial scout. It's also a more complex beast than a traditional single-rotor configuration. Take a look at the concept video below, or click through for a larger look at the photos released today. The hubs spin in opposite directions, whicheliminates the torque effect. Second, to provide the raw forward thrust for fast flight, the back of the aircraft mounts a pusher propeller. This design delivers that, plus incredible speed. It also negates the need for a regular tail rotor, as yaw can be managed using just the top rotors. Counter rotating props certainly aren't new. Also at that time higher harmonic control was receiving a lot of attention throughout the industry, and the thought was that the ABC might benefit from that technology. The Sikorsky-Boeing tech demonstrator SB-1 Defiant first took flight in March 2019 and leverages Sikorskys X2 technology with a rigid compound rotor and pusher prop. A helicopter can be designed to have blades that rotate clockwise or counterclockwise. And ABC promised improved maneuverability over conventional helicopters. They will be coming soon I'd imagine fb. Up to twice as fast as a regular helicopter. The CH-53K helicopter has been designed and built to the exacting standards of the U.S. Marine Corps (USMC) and will serve as its critical land and sea based logistics connector. Sikorsky stated working on the concept in 1964. He has appeared as a guest military expert on Fox News, MSNBC, The Military Channel, and The History Channel. Whats visible is a simulated version of a system called the modular effects launcher, which someday could carry missiles, rockets, or other kinetic objects, like drones or other sensors. Topics: acquisition, AH-64 Apache, Army, army future, AUSA 2017, Bell Helicopter, Boeing, Chris Gehler, Chris Van Buiten, compound helicopter, fixed wing, future vertical lift, FVL, helicopters, Lockheed Martin, marine future, marines, research and development, retreating blade stall, Richard Aboulafia, SB-1 Defiant, Sikorsky, tiltrotor, UH-60 Black Hawk, V-280, V-280 Valor. Our Multi-Domain Operations/Joint All-Domain Operations solutions provide a complete picture of the battlespace and empowers warfighters to quickly make decisions that drive action. S.Harding "U.S.Army Aircraft since 1947", 1990. We have invested in developing and demonstrating hypersonic technology for over 30 years. Been watching the x2 program progress for the last few years. "Weare diligently pursuing this as a research project. The V22 tilt-rotor uses counter-rotating proprotors in order to cancel out torque. First flight occurred in June, 1973. The testing of the full-scale ABC rotor system in the NASA Ames wind tunnel in 1970 was very successful, and the Army and the company decided that a high-speed research aircraft, evaluating the ABCs speed potential, was more productive. Sikorsky Aircraft Corporation: Counter-rotating rotor system with stationary standpipe US20150139799A1 (en) * 2013-11-15: 2015-05-21: Sikorsky Aircraft Corporation . The entire flight envelope was flown without any artificial stabilization equipment. The test envelope was expanded to level flight at 156 knots, dive speeds to 186 knots, and altitudes to 14,000 feet. People will be able to flyback and forth from visits, dates, and meetings twice as fast each way as itnow takes by helicopter," said Jackson. Aircraft #1 was rebuilt for wind tunnel testing, but was not returned to flight status. Bell V-280 Vs. Sikorsky-Boeing SB>1: Who Will Win Future Vertical Lift? Two P&WA PT-6 engines were used to power the rotors. A composite rotor system, with flexbeams replacing the pitch bearings, would replace the heavy titanium blades on the A version. With the counter-rotating rotors, no tail rotor was required to react rotor torque. The cockpit will seat two pilots side-by-side, and the cabin behind them will fit six combat-equipped soldiers. in the industry,? The V-280, by contrast looks purely like a Marine design, Aboulafia said. Two companies are competing against one another in a program called FARA (Future Attack Reconnaissance Aircraft) to create the whirlybird that will fill that role. While it did not crash, it did tip over as it sat idling on the heliport atop the Pan Am Building (now the MetLife . Sikorsky planned to offer it for the United States Army 's Armed Aerial Scout program, along with other possible uses. here for reprint permission. The idea was to eliminate the problem of retreating blade stall at high speed by using two counter-rotating rotors so that there were advancing blades on both sides of the aircraft. One of the unique features of the XH-59A gearbox was an ability to create differential rotor speed, which would provide yawing moments which did not reverse in autorotation. The SB>1 Defiant is a joint multi-role medium-class Future Vertical Lift technology demonstrator built around Sikorsky's X2 platform, which uses two counter-rotating rigid blades on the top of the aircraft to eliminate the retreating blade stall problem that puts a ~150 mph (~240 kmh) speed limit on helicopters with a single top rotor. The body shape of the aircraft does appear to blend somewhat gradually up to the rotor blades, as if to decrease sharp angles and engineer a gradual incline or slope from the front end of the aircraft up through the body to the rotor blades. "The entire rest of the flight program will take about a year to complete.". For example, the12-passenger S-76 helicopter flies at 178 mph, but an 11-seat BeechcraftKingAir 350 turboprop flies at 350 mph, nearly twice as fast. Groundtesting of the X2 Technology Demonstrator is still underway and Sikorsky hasn'tyet scheduled a date for the aircraft's first flight, said company spokesmanPaul Jackson. Design studies showed that four-bladed rotors would dramatically reduce the rotors vibratory characteristics. That required changing how the rotors flap, improving materials, and, above all, increasing the size of the rotors relative to the aircraft. But Sikorsky also created an alternative to the compound helicopter the Advancing Blade Concept, or ABC. Oct 26, 1972 : Igor Sikorsky dies due a heart attack at the age of 83. Thursday, December 29, 2022, The Front Page Podcast: Pumping the Brakes, NEW: Its not polite to pretend boys can be girls, SCOTUS takes on Bidens student debt agenda, Click It was a small toy powered by rubber bands, but it would turn out to be his life's work. k k k First Flights 35. positions. Rotating and counter-rotating charges antigravity demonostrated in Russia with an un-identified (update: now it's identified . The aircraft is the first S-100 Helicopter. This had the integrated propulsion system with twin General Electric T700-GE-700 engines driving both the rotor system and a ducted pusher propeller. here for reprint permission. [Edit #1] My initial answer wasn't very clear so here are some expanded details: A rigid rotor design. This proved to be successful, although it was a complex and expensive process which would have been prohibitive if the ABC were to be competitive for a production design. This type of configuration does not need a tail rotor because the main rotors are counter rotating. If you want to go faster and further, you need a fundamentally different design. The X2 demonstrator will feature a coaxial design (two rotors on . : The Future Vertical Lift program aims to create revolutionary replacements for todays military helicopters. There are several vendors now competing as part of an intense Army competition to ultimately choose and deploy a new fleet of aircraft with a much greater combat radius, fuel efficiency, speed, weapons, sensors and computer systems. If FARA is about finding a next-gen armed scout helicopter, then FLRAA is all about choosing a larger, Black-Hawk-type helicopter. On top of the helicopter is another component thats 3D-printed, as a stand-in for what will be the hubs for the top rotors and the gearbox. The just-announced challenge comes a month after the Army picked Bells V-280 Valor tiltrotor over the Defiant X, a helicopter built in a partnership by Sikorsky and Boeing. Unlike most helicopters, Sikorsky's bid uses two counter-rotating coaxial main rotors and a pusher propeller that the company says will allow for quicker acceleration and deceleration. This became the XH-59A, the subject of another chapter in this Sikorsky Product History section. The empennage was an inverted V to keep it under the rotor and minimize aircraft size. Kris Osborn is Defense Editor for theNational Interest. Although thetop speed of helicopters has not increased much since the 1960s, improvementsin computers, materials, navigation systems, and other aspects of aircraftduring the past two generations have been unprecedented. Answer: The Sikorsky S-97 Raider in the question photo might not be able to because of its rigid rotors. Kamov has been making dual contrarotating rotor helicopters since the 1940-s. | The SB>1 Defiant uses a pusher prop at the rear, along with active rudders and elevators. Helicopter main rotor vibration analysis with varying rotating speed. Contact the author here. 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Korea, Iran for more weapons ahead of spring offensive, NATO head warns, Sovereignty a vexing problem for Australian defense, Eye on exports, Lockheed Australia targets all domain AIR 6500, US State Department clears $500 million in anti-radiation missiles for Australia, Unmanned drones take too many humans to operate, says top Army aviator, Biggest-ever Avalon Air Show draws a dozen key US officials. in large part because of the two counter-rotating rotors. requirements and appeal to the traveling public. Boeing said it supports the protest filed by its partner. Published Jun 30, 2022 3:03 PM EDT. | That feat has since been eclipsed -- by a slim margin -- by the Eurocopter X3. It should be no surprise, either, that when I asked Sikorsky to respond to Bells critique, they got a senior executive on the phone in less than 24 hours. Updated 4:55 pm to clarify Richard Aboulafias remarks on Army preferences. Flight testing with the second aircraft resumed in November, 1974. He could be considered the most important person in the helicopter design. The design team had never dealt with a rotor system as stiff as this before. It never went beyond the concept stage. June 6, 2005 Sikorsky Aircraft today announced plans to build and test a demonstrator for a new class of coaxial X2 Technology helicopters that maintain or improve on all the vertical flight capabilities of rotorcraft and whose high speed configuration will cruise at 250 knots. In this work, different modelling aspects of helicopter dynamics are discussed. Visit our corporate site (opens in new tab). Terms of Use / Privacy Policy / Manage Newsletters, - Raider X is one of two candidates in the Army's Future Attack Reconnaissance Aircraft competition. This human and technical feat has given rise to a family of aircraft that have been entered into the history of aviation. Tail Rotors. Sikorsky's helicopters featured a sophisticated design which outperformed other manufacturers. Sikorsky was experimenting with a compound helicopter, the S-61F/NH-3, using an S-61/H-3 airframe. My team strives to advance aircraft engine capability through prioritization, definition, and execution of technology maturation programs. Sikorsky's technology puts two main rotors on top of each other, rotating in opposite directions, which balances out the lift profile on either side and allows the craft to fly much faster - up. The critical importance of the FLRAA mission to the Army and our nation requires the most capable, affordable and lowest-risk solution.. All rights reserved. Sikorsky and Boeing are protesting the Armys decision to award a lucrative defense contract to replace the services Black Hawk helicopters with a tiltrotor aircraft manufactured by Bell Textron. Someday, the Army could welcome a new scout helicopter into its fleet. ?Weinitiated X2 Technology convinced that the most productive and flexiblehelicopter is a helicopter which is capable of a significant increase in speed,?said Stephen Finger, then-president of Sikorsky Aircraft. At higher speeds, the rear prop provides extra drive and the rudders and elevators help with high speed maneuvering. The advancing blade concept had been shown in a textbook in the 1930s, but the structural requirements for the blades were well beyond the technology of the day. More importantly, the technology was not felt to be mature enough at the time of the UTTAS proposal. In 1967 Sikorsky investigated new light-weight dual-hardness aircraft armor. This flight marks a key milestone for the Sikorsky-Boeing team, and is the culmination of significant design, simulation and test activity to further demonstrate the capability of the X2 Technology. Sikorsky Aircraft and Boeing have developed their next-generation compound helicopter, and flight testing is underway to determine if the aircraft is capable of entering the U.S. military fleet. About the develemental phase when you already have a proven concept, insane. The same design approach was also considered for a larger AAPC, Aerial Armored Personnel Carrier, carrying twelve troops within the armored fuselage. Here's What You Need To Remember:The new aircraft will employ several measures designed to make it quieter, including, most notably, a counter-rotating rotor that muffles the sound of the first. Counter-rotating: Hub Type: Main Rotor . The Containerized Flight Training Device (CFTD) is a full-mission flight simulator that will allow flight crews to train on the full scope of Marine Corps heavy lift missions, including external lift operations, and executing degraded visual environment take-offs and landings. Army funding came from the Army Materials and Mechanics Research Center in Watertown, Mass, which was responsible for much of the development of the dual-hardness armor. As a result, the control system was designed with a very low gain to prevent the controls from being too sensitive. Similar to the X2 prototype, the Sikorsky S-97 Raider helicopter will have twin coaxial counter-rotating main rotors and a pusher propeller for cruise at 220 knots. A regular tail rotor was required to react rotor torque X2 technology ''? that would significantly helicopter... Armored fuselage you purchase through links on our site, we may earn an affiliate commission counter-rotating rotor and. To because of its rigid rotors likely sell it in the S-97 Raider in the question of three four-bladed! Directions, whicheliminates the torque effect Operations/Joint All-Domain Operations solutions provide a complete picture of the and!, but was not returned to flight status a fundamentally different design Aboulafia said Stallionadvances! Technology maturation Programs and support staff and demonstrating hypersonic technology for over 30 years the technology was not to! Prototypes fly for the rotor, as yaw can be designed to fly with or without the propulsion! Corporation: counter-rotating rotor system as stiff as this before wind tunnel generate would. Helicopter legacy for todays military helicopters with or without the auxiliary propulsion J-60s.... Site ( opens in new tab ) diligently pursuing this as a tail! To power the rotors capability to generate Lift would not drop off with speed, or with altitude purchase! The rotors not felt to be the construction of the battlespace and empowers warfighters quickly! Entire flight envelope was flown without any artificial stabilization equipment seat two pilots side-by-side, and execution of technology Programs... Counter-Rotating proprotors in order to cancel out torque ( update: now it & # x27 ; s.. Decision could happen in September off 400 employees at the concept video below, additional 3D-printed components out! Design studies showed that four-bladed rotors more then just war a research.. Sb-1 Defiant concept for the last few years, no tail rotor, drive,! Another image, below, additional 3D-printed components protrude out of the aircraft mounts pusher... Wind tunnel testing, but was not felt to be mature enough at the age of.. Light-Weight dual-hardness aircraft armor to advance aircraft engine capability through prioritization, definition, and of. Guest military expert on Fox News, MSNBC, the Army could welcome a new scout helicopter the! Clarify Richard Aboulafias remarks on Army preferences driving both the rotor system twin. Its Raider X prototype aircraft sporting modular weapon launchers loaded with Hellfire and... Or ABC was experimenting with a rotor system and a ducted pusher.! Rotor vibration analysis with varying rotating speed rotor because the main rotors are rotating! That have been entered into the History of aviation loaded with Hellfire missiles and a pusher. Be coming soon I 'd imagine fb ceramic hot-forming dies click through a... Raider and now the SB > 1 a single propulsion system with stationary standpipe US20150139799A1 ( en *. Formed into an elliptical shape, while twisted, in 2011, the company laid off employees... Speeds to 186 knots, and the cabin behind them will fit six combat-equipped soldiers attack the! The chief engineer on the a version time had spars made from constant-section extruded aluminum effect! Testing, but was not felt to be mature enough at the time of the bay! American helicopter Society paper Fifty years of manufacturing and operational success with CH-53A! Three versus four-bladed rotors X2 program progress for the first flight, the rear prop extra. Dealt with a compound helicopter the Advancing Blade concept, insane King Stallionadvances Sikorskys 50 of. The control system was designed to fly long distances continues tomake progress its. Visit our corporate site ( opens in new tab ) question photo might not be able because. In ceramic hot-forming dies thrust for fast flight, said Peter Grant, Sikorsky 's senior managerof Advanced.. The Future Vertical Lift photo might not be able to because of its Raider X aircraft! Bell might see their FARA competitive prototypes fly for the Joint Multi-Role demonstrator, a single system... Rotors vibratory characteristics 80 ft. wind tunnel this site constitutes acceptance of our Terms of Service and Privacy Policy forward. Complete. `` build is 90-percent complete, says Pete Germanowski, the rear prop extra... Choosing a larger AAPC, Aerial Armored Personnel Carrier, carrying twelve troops within the fuselage. Of its rigid rotors Sikorsky 's senior managerof Advanced Programs a Marine design, a to... A Masters Degree in Comparative Literature from Columbia University success with its CH-53A, CH-53D/G, and rudders. For the last few years to level flight at 156 knots, and execution of technology Programs! Rotor vibration analysis with varying rotating speed Army preferences take a look at the photos released.... Of this site constitutes acceptance of our Terms of Service and Privacy Policy he appeared... Ceramic hot-forming dies Operations/Joint All-Domain Operations solutions provide a complete picture of the battlespace and empowers to! System would power both the rotor, drive system, with flexbeams replacing the pitch bearings, replace... Construction of the two counter-rotating rotors demonostrated in Russia with an un-identified ( update: now &..., or click through for a regular tail rotor because the main rotors are counter rotating the rotors to. It in the commercial market as well the hubs spin in opposite directions whicheliminates. Cockpit will seat two pilots side-by-side, and execution of technology maturation Programs paraphrase helicopter pioneer Igor:... System would power both the rotor system as stiff as this before CH-53K test flight team has our experienced. Drop off with speed, or click through for a regular tail rotor because the main rotors are rotating. He could be considered the most important person in the helicopter design tab ) or the... Dynamics are discussed you already have a proven concept, or ABC Hellfire missiles and ducted! Power the rotors vibratory characteristics registration or use of this site constitutes acceptance of our Terms Service... And seasoned engineers, pilots, maintainers and support staff the design had... Speed and altitude performance an S-61/H-3 airframe over 30 years be designed to have blades rotate... Tab ) biggest challenge was going to be mature enough at the concept video below, or click through a... Versus four-bladed rotors would dramatically reduce the rotors capability to generate Lift would not drop off with speed, with. Alternative to the Future Vertical Lift aircraft warfighters to quickly make decisions that drive.... Fabricated in 1970 and tested in the S-97 Raider and now the SB >:. Flexbeams replacing the pitch bearings, would replace the heavy titanium blades on the version. Paraphrase helicopter pioneer Igor Sikorsky: if you want to pay more power both the rotor and minimize aircraft.. Faster speeds, you need a fundamentally different design we may earn an affiliate commission or.. Of this site constitutes acceptance of our Terms of Service and Privacy Policy pay more re in trouble,. Aircraft that have been entered into the History of aviation has our most experienced and seasoned engineers, pilots maintainers! That four-bladed rotors would dramatically reduce the rotors launchers loaded with Hellfire missiles and a ducted pusher propeller is simply! Helicopter main rotor vibration analysis with varying rotating speed with the counter-rotating rotors more then just.. Aboulafia said enough at the concept video below, or with altitude of chapter... Fundamentally different design 50 years of manufacturing and operational success with its CH-53A, CH-53D/G, and preliminary of! Made from constant-section extruded aluminum. `` complete picture sikorsky counter rotating helicopter the aircraft was designed with a very gain. Flight for that program is expected in 2017, MSNBC, the rear prop provides extra drive and the and... Twelve troops within the Armored fuselage update: now it & # x27 ; helicopters... 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Quadcopter design ( similar to drones ), different modelling aspects of helicopter dynamics are discussed as fast as regular! Boeing said it supports the protest filed by its partner answer: the Future Vertical Lift aims. Question photo might not be able to because of its Raider X prototype aircraft sporting weapon. More importantly, the company laid off 400 employees at the time of flight. Next-Gen armed scout helicopter, then FLRAA is all about choosing sikorsky counter rotating helicopter larger, Black-Hawk-type helicopter was inverted. Antigravity demonostrated in Russia with an un-identified ( update: now it #. Not felt to be mature enough at the time of the battlespace and warfighters... 2013-11-15: 2015-05-21: Sikorsky aircraft Corporation an auxiliary propulsion J-60s installed Operations/Joint All-Domain solutions! React rotor torque extra drive and the History Channel propeller or ducted.... Regular tail rotor because the main rotors are counter rotating that feat has been! An inverted V to keep it under the rotor and an auxiliary propulsion propeller or ducted fan entire envelope. Two rotors on ; s helicopters featured a sophisticated design which outperformed other.... Twice as fast as a research project a version sikorsky counter rotating helicopter will fit six combat-equipped soldiers Columbia. The two counter-rotating rotors stationary standpipe US20150139799A1 ( en ) * 2013-11-15: 2015-05-21: Sikorsky aircraft.... It & # x27 ; s identified flight status develemental phase when you already have a proven concept, ABC!

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