Hyperloop

Source: Wikipedia, the free encyclopedia.

Concept art of Hyperloop inner workings

A hyperloop is a proposed high-speed transportation system for both public and goods transport.[1] The term was popularized by Elon Musk to describe a modern project based on the vactrain concept (first appearance 1799).[2] Hyperloop designs employ three essential components: tubes, pods, and terminals.[1] The tube is a large sealed, low-pressure system (usually a long tunnel). The pod is a coach pressurized at atmospheric pressure that runs substantially free of air resistance or friction inside this tube,[3] using magnetic propulsion (in some cases augmented by a ducted fan). The terminal handles pod arrivals and departures.[1] The Hyperloop, in the initial form proposed by Musk, differs from vactrains by relying on residual air pressure inside the tube to provide lift by aerofoils and propulsion by fans.[4]

The hyperloop has its roots in a concept by George Medhurst in 1799 and subsequently developed under the names pneumatic railway, atmospheric railway or vactrain.[5] Elon Musk renewed interest in hyperloop after mentioning it in a 2012 speaking event.[6] Musk further promoted the concept by publishing a white paper in August 2013, which conceived of a hyperloop route running from the Los Angeles region to the San Francisco Bay Area, roughly following the Interstate 5 corridor.[4] His initial concept incorporated reduced-pressure tubes in which pressurized capsules ride on air bearings driven by linear induction motors and axial compressors.[7] Transportation analysts challenged the cost estimates included in the white paper, with some predicting that a realized hyperloop would be several billion dollars over budget.[8][9][10]

The hyperloop concept has been promoted by Musk and SpaceX, and other companies or organizations have been encouraged to collaborate and develop the technology.[11] Technical University of Munich Hyperloop set the hyperloop speed record of 463 km/h (288 mph) in July 2019[12][13] at the pod design competition hosted by SpaceX in Hawthorne, California.[14] Virgin Hyperloop conducted the first human trial in November 2020 at its test site in Las Vegas, reaching a top speed of 172 km/h (107 mph).[15]

History

After being conceived in 1799, the vactrain was invented in 1904 by Robert H. Goddard, a freshman at Worcester Polytechnic Institute.[16]

Musk first mentioned that he was thinking about a concept for a "fifth mode of transport", calling it the Hyperloop, in July 2012 at a PandoDaily event in Santa Monica, California. This hypothetical high-speed mode of transportation would have the following characteristics: immunity to weather, collision free, twice the speed of a plane, low power consumption, and energy storage for 24-hour operations.[17] The name Hyperloop was chosen because it would go in a loop. Musk envisions the more advanced versions will be able to go at hypersonic speed.[18] In May 2013, Musk likened his Hyperloop to a "cross between a Concorde and a railgun and an air hockey table".[19]

From late 2012 until August 2013, a group of engineers from both Tesla and SpaceX worked on the conceptual modeling of Musk's Hyperloop.[20] An early system conceptual model was published in the Tesla and SpaceX blogs[4][21] which describes one potential design, function, pathway, and cost of a hyperloop system.[4] According to the alpha design, pods would accelerate to cruising speeds gradually using linear electric motors and glide above their track on air bearings through tubes above ground on columns or below ground in tunnels to avoid the dangers of grade crossings. An ideal hyperloop system will be more energy-efficient,[22][23] quiet, and autonomous than existing modes of mass transit. Musk has also invited feedback to "see if the people can find ways to improve it". The Hyperloop Alpha was released as an open source design.[24] The trademark "HYPERLOOP", applicable to "high-speed transportation of goods in tubes" was issued to SpaceX on 4 April 2017.[25][26]

In June 2015, SpaceX announced that it would build a 1-mile-long (1.6 km) test track to be located next to SpaceX's Hawthorne facility. The track was completed and used to test pod designs supplied by third parties in the competition.[27][28]

By November 2015, with several commercial companies and dozens of student teams pursuing the development of Hyperloop technologies, the Wall Street Journal asserted that "The Hyperloop Movement", as some of its unaffiliated members refer to themselves, is officially bigger than the man who started it."[29]

The Massachusetts Institute of Technology (MIT) hyperloop team developed the first hyperloop pod prototype, which they unveiled at the MIT Museum on 13 May 2016. Their design uses electrodynamic suspension for levitating and eddy current braking.[30]

On 29 January 2017, approximately one year after phase one of the hyperloop pod competition,[31] the MIT Hyperloop pod demonstrated the first ever low-pressure hyperloop run in the world.[32] Within this first competition the Delft University team from the Netherlands achieved the highest overall competition score, winning the prize for "best overall design".[33][34] The award for the "fastest pod" was won by the Technical University of Munich (TUM), Germany, team WARR Hyperloop.[35] The MIT team placed third overall in the competition, judged by SpaceX engineers.[36]

The second hyperloop pod competition took place from 25 to 27 August 2017. The only judging criterion was top speed, provided it was followed by successful deceleration. The TUM WARR Hyperloop won the competition by reaching a top speed of 324 km/h (201 mph), breaking the previous record of 310 km/h (190 mph) for hyperloop prototypes set by Hyperloop One on their own test track.[37][38][39]

A third hyperloop pod competition took place in July 2018. The defending champions, the TUM WARR hyperloop team, beat their own record with a top speed of 457 km/h (284 mph) during their run.[40]

The fourth competition in August 2019 saw the TUM team, now known as TUM Hyperloop (by NEXT Prototypes e.V.),[41] again winning the competition and beating their own record with a top speed of 463 km/h (288 mph).[34]

The first passenger test of hyperloop technology was successfully conducted by Virgin Hyperloop with two employees of the company in November 2020, where the unit reached a maximum speed of 172 km/h (107 mph).[42]

Theory and operation

An artist's rendition of a Hyperloop capsule: Axial compressor on the front, passenger compartment in the middle, battery compartment at the back, and air caster skis at the bottom
A 3D sketch of potential Hyperloop infrastructure. The steel tubes are rendered transparent in this image.

The vactrain concept resembles a high-speed rail system without substantial air resistance by employing magnetically levitating trains in evacuated (airless) or partly evacuated tubes. However, the difficulty of maintaining a vacuum over large distances has prevented this type of system from ever being built. The hyperloop is similar to a vactrain system but operates at approximately one millibar (100 Pa) of pressure.[43]

Initial design concept

The hyperloop concept operates by sending specially designed "capsules" or "pods" through a steel tube maintained at a partial vacuum. In Musk's original concept, each capsule would float on a 0.02–0.05 in (0.5–1.3 mm) layer of air provided under pressure to air-caster "skis", similar to how pucks are levitated above an air hockey table, while still allowing higher speeds than wheels can sustain. With rolling resistance eliminated and air resistance greatly reduced, the capsules can glide for the bulk of the journey. In the alpha design concept, an electrically driven inlet fan and axial compressor would be placed at the nose of the capsule to "actively transfer high-pressure air from the front to the rear of the vessel", resolving the problem of air pressure building in front of the vehicle, slowing it down. A fraction of the air was to be shunted to the skis for additional pressure, augmenting that gain passively from lift due to their shape.[4]

In the alpha-level concept, passenger-only pods were to be 7 ft 4 in (2.23 m) in diameter and were projected to reach a top speed of 760 mph (1,220 km/h) to maintain aerodynamic efficiency.[4] (Section 4.4) The design proposed passengers experience a maximum inertial acceleration of 0.5 g, about 2 or 3 times that of a commercial airliner on takeoff and landing.[citation needed]

Proposed routes

Interstate 5

A number of routes have been proposed for hyperloop systems that meet the approximate distance conditions for which a hyperloop is hypothesized to provide improved transport times (distances of under approximately 1,500 kilometres (930 miles)).[44] Route proposals range from speculation described in company releases to business cases to signed agreements.

United States

The route suggested in the 2013 alpha-level design document was from the Greater Los Angeles Area to the San Francisco Bay Area. That conceptual system would begin around Sylmar, just south of the Tejon Pass, follow Interstate 5 to the north, and arrive near Hayward on the east side of San Francisco Bay. Several proposed branches were also shown in the design document, including Sacramento, Anaheim, San Diego, and Las Vegas.[4]

No work has been done on the route proposed in Musk's alpha-design; one cited reason is that it would terminate on the fringes of the two major metropolitan areas (Los Angeles and San Francisco), resulting in significant cost savings in construction, but requiring that passengers traveling to and from Downtown Los Angeles and San Francisco, and any other community beyond Sylmar and Hayward, to transfer to another transportation mode in order to reach their final destination. This would significantly lengthen the total travel time to those destinations.[45]

A similar problem already affects present-day air travel, where on short routes (like LAX–SFO) the flight time is only a rather small part of door to door travel time. Critics have argued that this would significantly reduce the proposed cost and/or time savings of hyperloop as compared to the California High-Speed Rail project that will serve downtown stations in both San Francisco and Los Angeles.[46][47][48] Passengers traveling from financial center to financial center are estimated to save about two hours by taking the Hyperloop instead of driving the whole distance.[49]

Others questioned the cost projections for the suggested California route. Some transportation engineers argued in 2013 that they found the alpha-level design cost estimates unrealistically low given the scale of construction and reliance on unproven technology. The technological and economic feasibility of the idea is unproven and a subject of significant debate.[8][9][10][45]

In November 2017, Arrivo announced a concept for a maglev automobile transport system from Aurora, Colorado to Denver International Airport, the first leg of a system from downtown Denver.[50] Its contract described potential completion of a first leg in 2021. In February 2018, Hyperloop Transportation Technologies announced a similar plan for a loop connecting Chicago and Cleveland and a loop connecting Washington and New York City.[51]

In 2018 the Missouri Hyperloop Coalition was formed between Virgin Hyperloop One, the University of Missouri, and engineering firm Black & Veatch to study a proposed route connecting St. Louis, Columbia, and Kansas City.[52][53]

On 19 December 2018, Elon Musk unveiled a 2-mile (3 km) tunnel below Los Angeles. In the presentation, a Tesla Model X drove in a tunnel on the predefined track (rather than in a low-pressure tube). According to Musk the costs for the system are US$10 million.[54] Musk said: "The Loop is a stepping stone toward hyperloop. The Loop is for transport within a city. Hyperloop is for transport between cities, and that would go much faster than 150 mph."[55]

The Northeast Ohio Areawide Coordinating Agency, or NOACA, partnered with Hyperloop Transportation Technologies[when?] to conduct a $1.3 million feasibility study for developing a hyperloop corridor route from Chicago to Cleveland and Pittsburgh for America's first multistate hyperloop system in the Great Lakes Megaregion. Hundreds of thousands of dollars already have been committed to the project. NOACA's Board of Directors has awarded a $550,029 contract to Transportation Economics & Management Systems, Inc. (TEMS) for the Great Lakes Hyperloop Feasibility Study to evaluate the feasibility of an ultra-high-speed hyperloop passenger and freight transport system initially linking Cleveland and Chicago.[56][full citation needed]

India

Hyperloop Transportation Technologies were considering in 2016 with the Indian Government for a proposed route between Chennai and Bengaluru, with a conceptual travel time for 345 km (214 mi) of 30 minutes.[57] HTT also signed an agreement with Andhra Pradesh government to build India's first hyperloop project connecting Amaravathi to Vijayawada in a 6-minute ride.[58]

On 22 February 2018, Hyperloop One entered into a memorandum of understanding with the Government of Maharashtra to build a hyperloop transportation system between Mumbai and Pune that would cut the travel time from the current 180 minutes to 20 minutes.[59][60]

Indore-based Dinclix GroundWorks' DGWHyperloop advocates a hyperloop corridor between Mumbai and Delhi, via Indore, Kota, and Jaipur.[61]

The Ministry of Railways will collaborate with IIT Madras for the development of an "indigenous" Hyperloop system and will help set-up a Centre of Excellence for Hyperloop Technologies at IIT.[62]

Saudi Arabia

On 6 February 2020, the Ministry of Transport in the Kingdom of Saudi Arabia announced a contract agreement with Virgin Hyperloop One (VHO) to conduct a ground-breaking pre-feasibility study on the use of hyperloop technology for the transport of passengers and cargo.[63] The study will serve as a blueprint for future hyperloop projects and build on the developers long-standing relationship with the kingdom, which has peaked when His Royal Highness Prince Mohammed bin Salman Abdulaziz Al Saud, Crown Prince of Saudi Arabia, viewed VHO's passenger pod during a visit to the United States.[63]

Italy

On 29 December 2021, the Veneto Regional Council approved a memorandum of understanding with MIMS and CAV for the testing of hyper transfer technology.[64] By mid 2023, the feasibility study by a company selected by CAV will have to be completed and the development of a first prototype completed in 2026. 4 million euro have been allocated for this phase.

Elsewhere in the world

Many of the active Hyperloop routes that have been considered are outside of the US. In 2016, Hyperloop One published the world's first detailed business case for a 300-mile (500 km) route between Helsinki and Stockholm, which would tunnel under the Baltic Sea to connect the two capitals in under 30 minutes.[65] Hyperloop One undertook a feasibility study with DP World to move containers from its Port of Jebel Ali in Dubai.[66] In late 2016, Hyperloop One announced a feasibility study with Dubai's Roads and Transport Authority for passenger and freight routes connecting Dubai with the greater United Arab Emirates. Hyperloop One was also considering passenger routes in Moscow during 2016,[67] and a cargo hyperloop to connect Hunchun in north-eastern China to the Port of Zarubino, near Vladivostok and the North Korean border on Russia's Far East.[68] In May 2016, Hyperloop One kicked off their Global Challenge with a call for comprehensive proposals of hyperloop networks around the world.[69] In September 2017, Hyperloop One selected 10 routes from 35 of the strongest proposals: TorontoMontreal, CheyenneDenverPueblo, MiamiOrlando, DallasLaredoHouston, ChicagoColumbusPittsburgh, Mexico CityGuadalajara, EdinburghLondon, GlasgowLiverpool, BengaluruChennai, and MumbaiChennai.[70][71]

Others have put forward European routes, including a route beginning at Amsterdam or Schiphol to Frankfurt.[72][73][74] In 2016, a Warsaw University of Technology team began evaluating potential routes from Cracow to Gdańsk across Poland proposed by Hyper Poland.[75]

TransPod explored the possibility of hyperloop routes which would connect Toronto and Montreal,[76][77] Toronto to Windsor,[78] and Calgary to Edmonton.[79] Toronto and Montreal, the largest cities in Canada, are currently connected by Ontario Highway 401, the busiest highway in North America.[80] In March 2019, Transport Canada commissioned the study of hyperloops, so it can be "better informed on the technical, operational, economic, safety, and regulatory aspects of the hyperloop and understand its construction requirements and commercial feasibility."[81]

Hyperloop Transportation Technologies (HTT) reportedly signed an agreement with the government of Slovakia in March 2016 to perform impact studies, with potential links between Bratislava, Vienna, and Budapest, but there have been no further developments.[82] In January 2017, HTT signed an agreement to explore the route BratislavaBrnoPrague in Central Europe.[83]

In 2017, SINTEF, the largest independent research organization in Scandinavia, announced they were considering building a test lab for hyperloop in Norway.[84]

An agreement was signed in June 2017 to co-develop a hyperloop line between Seoul and Busan in South Korea.[85][86]

Mars

According to Musk, hyperloop would be useful on Mars as no tubes would be needed because Mars' atmosphere is about 1% the density of the Earth's at sea level.[87][18][88][89] For the hyperloop concept to work on Earth, low-pressure tubes are required to reduce air resistance. However, if they were to be built on Mars, the lower air resistance would allow a hyperloop to be created with no tube, only a track, and so would be just a magnetically levitating train.[90]

Open-source design evolution

In September 2013, Ansys Corporation ran computational fluid dynamics simulations to model the aerodynamics of the capsule and shear stress forces that the capsule would be subjected to. The simulation showed that the capsule design would need to be significantly reshaped to avoid creating supersonic airflow, and that the gap between the tube wall and capsule would need to be larger. Ansys employee Sandeep Sovani said the simulation showed that hyperloop has challenges but that he is convinced it is feasible.[91][92]

In October 2013, the development team of the OpenMDAO software framework released an unfinished, conceptual open-source model of parts of the hyperloop's propulsion system. The team asserted that the model demonstrated the concept's feasibility, although the tube would need to be 13 feet (4 m) in diameter,[93] significantly larger than originally projected. However, the team's model is not a true working model of the propulsion system, as it did not account for a wide range of technical factors required to physically construct a hyperloop based on Musk's concept, and in particular had no significant estimations of component weight.[94]

In November 2013, MathWorks analyzed the proposal's suggested route and concluded that the route was mainly feasible. The analysis focused on the acceleration experienced by passengers and the necessary deviations from public roads in order to keep the accelerations reasonable; it did highlight that maintaining a trajectory along I-580 east of San Francisco at the planned speeds was not possible without significant deviation into heavily populated areas.[95]

In January 2015, a paper based on the NASA OpenMDAO open-source model reiterated the need for a larger diameter tube and a reduced cruise speed closer to Mach 0.85. It recommended removing on-board heat exchangers based on thermal models of the interactions between the compressor cycle, tube, and ambient environment. The compression cycle would only contribute 5% of the heat added to the tube, with 95% of the heat attributed to radiation and convection into the tube. The weight and volume penalty of on-board heat exchangers would not be worth the minor benefit, and regardless the steady-state temperature in the tube would only reach 30–40 °F (17–22 °C) above ambient temperature.[96]

According to Musk, various aspects of the hyperloop have technology applications to other Musk interests, including surface transportation on Mars and electric jet propulsion.[97][98]

Researchers associated with MIT's department of Aeronautics and Astronautics published research in June 2017 that verified the challenge of aerodynamic design near the Kantrowitz limit that had been theorized in the original SpaceX Alpha-design concept released in 2013.[99]

In 2017, Dr. Richard Geddes and others formed the Hyperloop Advanced Research Partnership to act as a clearinghouse of Hyperloop public domain reports and data.[100]

In February 2020, Hardt Hyperloop, Hyper Poland, TransPod and Zeleros formed a consortium to drive standardisation efforts, as part of a joint technical committee (JTC20) set up by European standards bodies CEN and CENELEC to develop common standards aimed at ensuring the safety and interoperability of infrastructure, rolling stock, signalling and other systems.[101]

Hyperloop research programs

TUM Hyperloop (previously WARR Hyperloop)

TUM Hyperloop is a research program that emerged in 2019 from the team of hyperloop pod competition from the Technical University of Munich. The TUM Hyperloop team had won all four competitions in a row, achieving the world record of 463 km/h (288 mph), which is still valid today.[12][13] The research program has the goals to investigate the technical feasibility by means of a demonstrator, as well as by simulation the economic and technical feasibility of the hyperloop system. The planned 24m demonstrator will consist of a tube and the full-size pod.[102] The next steps after completion of the first project phase are the extension to 400m to investigate higher speeds. This is planned in the Munich area, in Taufkirchen, Ottobrunn or at the Oberpfaffenhofen airfield.[103]

Eurotube

EuroTube is a non-profit research organization for the development of vacuum transport technology.[104] EuroTube is currently developing a 3.1 km (1.9 mi) test tube in Collombey-Muraz, Switzerland. The organization was founded in 2017 at ETH Zurich as a Swiss association and became a Swiss foundation in 2019.[105] The test tube is planned on a 2:1 scale with a diameter of 2.2 m and designed for 900 km/h (560 mph).

Hyperloop pod competition

Hyperloop pod competition

A number of student and non-student teams were participating in a hyperloop pod competition in 2015–16, and at least 22 of them built hardware to compete on a sponsored hyperloop test track in mid-2016.[106]

In June 2015, SpaceX announced that they would sponsor a hyperloop pod design competition, and would build a 1-mile-long (1.6 km) subscale test track near SpaceX's headquarters in Hawthorne, California, for the competitive event in 2016.[107][108] SpaceX stated in their announcement, "Neither SpaceX nor Elon Musk is affiliated with any Hyperloop companies. While we are not developing a commercial Hyperloop ourselves, we are interested in helping to accelerate development of a functional Hyperloop prototype."[109]

More than 700 teams had submitted preliminary applications by July,[110] and detailed competition rules were released in August.[111] Intent to Compete submissions were due in September 2015 with more detailed tube and technical specification released by SpaceX in October. A preliminary design briefing was held in November 2015, where more than 120 student engineering teams were selected to submit Final Design Packages due by 13 January 2016.[112]

A Design Weekend was held at Texas A&M University 29–30 January 2016, for all invited entrants.[113] Engineers from the Massachusetts Institute of Technology were named the winners of the competition. While the University of Washington team won the Safety Subsystem Award, Delft University won the Pod Innovation Award[114] as well as the second place, followed by the University of Wisconsin–Madison, Virginia Tech, and the University of California, Irvine.[106][115] In the Design Category, the winner team was Hyperloop UPV from Universitat Politecnica de Valencia, Spain.[116] On 29 January 2017, Delft Hyperloop (Delft University of Technology) won the prize for the "best overall design" at the final stage of the SpaceX hyperloop competition,[117] while WARR Hyperloop of the Technical University of Munich won the prize for "fastest pod".[34] The Massachusetts Institute of Technology placed third.[118]

The second hyperloop pod competition took place from 25 to 27 August 2017. The only judging criteria being top speed provided it is followed by successful deceleration. WARR Hyperloop from the Technical University of Munich won the competition by reaching a top speed of 324 km/h (201 mph).[37][38][39]

A third hyperloop pod competition took place in July 2018. The defending champions, the WARR Hyperloop team from the Technical University of Munich, beat their own record with a top speed of 457 km/h (284 mph) during their run.[40] The fourth competition in August 2019 saw the team from the Technical University of Munich, now known as TUM Hyperloop (by NEXT Prototypes e.V.),[41] again winning the competition and beating their own record with a top speed of 463 km/h (288 mph).[34]

Criticism and human factor considerations

Some critics of hyperloop focus on the experience—possibly unpleasant and frightening—of riding in a narrow, sealed, windowless capsule inside a sealed steel tunnel, that is subjected to significant acceleration forces; high noise levels due to air being compressed and ducted around the capsule at near-sonic speeds; and the vibration and jostling.[119] Even if the tube is initially smooth, ground may shift with seismic activity. At high speeds, even minor deviations from a straight path may add considerable buffeting.[120] This is in addition to practical and logistical questions regarding how to best deal with safety issues such as equipment malfunction, accidents, and emergency evacuations.

Other maglev trains are already in use, which avoid much of the added costs of hyperloop. The SCMaglev[121] in Japan has demonstrated 603 km/h (375 mph) without a vacuum tube, by using an extremely aerodynamic train design. It also avoids the cost and time required to pressurize and depressurize the exit and entry points of a hyperloop tube.

There is also the criticism of design technicalities in the tube system. John Hansman, professor of aeronautics and astronautics at MIT, has stated problems, such as how a slight misalignment in the tube would be compensated for and the potential interplay between the air cushion and the low-pressure air. He has also questioned what would happen if the power were to go out when the pod was miles away from a city. UC Berkeley physics professor Richard Muller has also expressed concern regarding "[the Hyperloop's] novelty and the vulnerability of its tubes, [which] would be a tempting target for terrorists", and that the system could be disrupted by everyday dirt and grime.[122]

Political and economic considerations

The alpha proposal projected that cost savings compared with conventional rail would come from a combination of several factors. The small profile and elevated nature of the alpha route would enable hyperloop to be constructed primarily in the median of Interstate 5. However, whether this would be truly feasible is a matter of debate. The low profile would reduce tunnel boring requirements and the light weight of the capsules is projected to reduce construction costs over conventional passenger rail. It was asserted that there would be less right-of-way opposition and environmental impact as well due to its small, sealed, elevated profile versus that of a rail easement;[4] however, other commentators contend that a smaller footprint does not guarantee less opposition.[45] In criticizing this assumption, mass transportation writer Alon Levy said, "In reality, an all-elevated system (which is what Musk proposes with the Hyperloop) is a bug rather than a feature. Central Valley land is cheap; pylons are expensive, as can be readily seen by the costs of elevated highways and trains all over the world".[123][124] Michael Anderson, a professor of agricultural and resource economics at UC Berkeley, predicted that costs would amount to around US$100 billion.[9]

No total ticket price was suggested in the alpha design in Elon Musk's initial whitepaper.[4] Projected low ticket prices by hyperloop developers have been questioned by Dan Sperling, director of the Institute of Transportation Studies at UC Davis, who stated that "there's no way the economics on that would ever work out."[9] Some critics have argued that, since hyperloops are designed to carry fewer passengers than typical public train systems, it could make it difficult to price tickets to cover the costs of construction and running.[125]

The early cost estimates of the hyperloop are a subject of debate. A number of economists and transportation experts have expressed the belief that the US$6 billion price tag dramatically understates the cost of designing, developing, constructing, and testing an all-new form of transportation.[8][9][45][124] The Economist said that the estimates are unlikely to "be immune to the hypertrophication of cost that every other grand infrastructure project seems doomed to suffer."[16]

Political impediments to the construction of such a project in California will be very large. There is a great deal of "political and reputation capital" invested in the existing mega-project of California High-Speed Rail.[16] Replacing that with a different design would not be straightforward given California's political economy. Texas has been suggested as an alternate for its more amenable political and economic environment.[16]

Building a successful hyperloop sub-scale demonstration project could reduce the political impediments and improve cost estimates. Musk has suggested that he may be personally involved in building a demonstration prototype of the hyperloop concept, including funding the development effort.[20][16]

The solar panels Musk plans to install along the length of the hyperloop system have been criticized by engineering professor Roger Goodall of Loughborough University, as not being feasible enough to return enough energy to power the hyperloop system, arguing that the air pumps and propulsion would require much more power than the solar panels could generate.[122]

Hyperloop companies

Company Name Country Est. Fate Notes
Virgin Hyperloop U.S. 2014 Active Ended development of passenger travel in February 2022 to focus on freight[126]
Hyperloop Transportation Technologies U.S. 2013 Active
Transpod Canada, France 2015 Active
DGWHyperloop India 2015 Active
Arrivo U.S. 2016 Defunct[127] Ended hyperloop development in November 2017 in favor of maglev
Hardt Global Mobility Netherlands 2016 Active
Zeleros Spain 2016 Active
Nemovo Poland 2017 Active Named Hyper Poland until November 2020[128]

Related projects

Historical

The concept of transportation of passengers in pneumatic tubes is not new. The first patent to transport goods in tubes was created in 1799 by the British mechanical engineer and inventor George Medhurst. In 1812, Medhurst wrote a book detailing his idea of transporting passengers and goods through air-tight tubes using air propulsion.[129]

In the early 1800s, there were other similar systems proposed or experimented with and were generally known as atmospheric railway projects, though this term is now also used for systems where the propulsion is provided by a separate pneumatic tube to the train tunnel itself.

One of the earliest constructions was the Dalkey Atmospheric Railway which operated near Dublin between 1844 and 1854.

The Crystal Palace pneumatic railway operated in London around 1864 and used large fans, some 22 ft (6.7 m) in diameter, that were powered by a steam engine. The tunnels are now lost but the line operated successfully for over a year.

Operated from 1870 to 1873, the Beach Pneumatic Transit was a one-block-long prototype of an underground tube transport public transit system in New York City. The system worked at near-atmospheric pressure, and the passenger car moved by means of higher pressure air applied to the back of the car while comparatively lower pressure air was maintained on the front of the car.[130]

In the 1910s, vacuum trains were first described by American rocket pioneer Robert Goddard.[16] While the hyperloop has significant innovations over early proposals for reduced pressure or vacuum-tube transportation apparatus, the work of Goddard "appears to have the greatest overlap with the Hyperloop".[7]

In 1981 Princeton physicist Gerard K. O'Neill wrote about transcontinental trains using magnetic propulsion in his book 2081: A Hopeful View of the Human Future. Though being a work of fiction, this book was an attempt to predict future technologies in everyday life. In his prediction, he envisioned these trains which used magnetic levitation running in tunnels which had much of the air evacuated to increase speed and significantly reduce friction. He also demonstrated a scale prototype device that accelerated an object using magnetic propulsion to high speeds. It was called a mass driver and was a central theme in his non-fiction book on space colonization "The High Frontier".

Swissmetro was a proposal to run a maglev train in a low-pressure environment. Concessions were granted to Swissmetro in the early 2000s to connect the Swiss cities of St. Gallen, Zurich, Basel, and Geneva. Studies of commercial feasibility reached differing conclusions and the vactrain was never built.[131]

The ET3 Global Alliance (ET3) was founded by Daryl Oster in 1997 with the goal of establishing a global transportation system using passenger capsules in frictionless maglev full-vacuum tubes. Oster and his team met with Elon Musk on 18 September 2013, to discuss the technology,[132] resulting in Musk promising an investment in a 3-mile (5 km) prototype of ET3's proposed design.[133][needs update]

From 2003 Franco Cotana led the development of Pipenet which had a small bore evacuated tube for moving freight at up to 2,000 km/h (1,200 mph) using linear synchronous motors and magnetic levitation. A prototype system - 100 m (110 yd) long and 1.25 m (1.37 yd) in diameter - was constructed in Italy in 2005. However development stopped after funding ceased.[134]

China was reported to be building a vacuum based 600 mph (1,000 km/h) maglev train in August 2010 according to a laboratory at Southwest Jiaotong University. It was expected to cost CN¥10–20 million (US$2.95 million at the August 2010 exchange rate) more per kilometer than regular high-speed rail.[135] In 2018 a 45 m (49 yd) loop test track was completed to test some of the technology.[136]

In 2018, the new concept of creating and using intermodal hyperloop capsules was presented. After detaching the drive elements, capsules could be used in a way similar to traditional containers for fast transport of goods or individuals. It has been proposed that specialized airplanes, dedicated high-speed trains, road tractors or watercrafts perform "last mile" transport for solving the problem of fast transportation to centers where hyperloop terminals are locally unavailable or infeasible to be constructed.[137]

In May 2021, it was reported that a low-vacuum sealed tube test system capable of reaching speeds around 1,000 km/h (620 mph) had begun construction in Datong, Shanxi Province. An initial 2 km (1.2 mi) section is to be completed by July 2022 and a 15 km (9.3 mi) test line within two years. The line will be built by the North University of China and the Third Research Institute of China Aerospace Science and Industry Corporation.

See also

References

  1. ^ a b c Motwani, Sachin; Gupta, Anubha (July 2021). "Experiencing Hyperloops: The Transit of the Future". Computer. 54 (7): 37–45. doi:10.1109/MC.2021.3074006. ISSN 0018-9162. S2CID 235761756.
  2. ^ "The Hyperloop Is Hyper Old". IEEE Spectrum. 26 November 2021. Retrieved 28 November 2021.
  3. ^ Opgenoord, Max M. J. "How does the aerodynamic design implement in hyperloop concept?". Mechanical Engineering. MIT - Massachusetts Institute of Technology. Retrieved 16 September 2019.
  4. ^ a b c d e f g h i Musk, Elon (12 August 2013). "Hyperloop Alpha" (PDF). Retrieved 13 August 2013.
  5. ^ Buchanan, R.A. (May 1992). "The Atmospheric Railway of I.K. Brunel". Social Studies of Science. 22 (2): 231–243. doi:10.1177/030631292022002003. S2CID 146426568.
  6. ^ "Pando Monthly presents a fireside chat with Elon Musk". pando.com. PandoDaily. 13 July 2012. Retrieved 15 July 2017.
  7. ^ a b "Beyond the hype of Hyperloop: An analysis of Elon Musk's proposed transit system". Gizmag.com. 22 August 2013. Retrieved 23 August 2013.
  8. ^ a b c Bilton, Nick. "Could the Hyperloop Really Cost $6 Billion? Critics Say No". The New York Times. Retrieved 18 August 2013.
  9. ^ a b c d e Brownstein, Joseph (14 August 2013). "Economists don't believe the Hyperloop". Al Jazeera America.
  10. ^ a b Melendez, Eleazar David (14 August 2013). "Hyperloop Would Have 'Astronomical' Pricing, Unrealistic Construction Costs, Experts Say". The Huffington Post.
  11. ^ Hawkins, Andrew J. (18 June 2016). "Here are the Hyperloop pods competing in Elon Musk's big race later this year". The Verge. Retrieved 19 October 2016.
  12. ^ a b "TU München heimst vierten Hyperloop-Sieg in Folge ein". BR24 (in German). 22 July 2019. Retrieved 21 May 2021.
  13. ^ a b Porter, Jon (22 July 2019). "Elon Musk promises new Hyperloop tunnel after speed record broken". The Verge. Retrieved 21 May 2021.
  14. ^ Etherington, Darrell (2 September 2016). "Here's a first look at the SpaceX Hyperloop test track". TechCrunch.
  15. ^ "First passengers travel in Virgin's levitating hyperloop pod system". The Guardian. 9 November 2020. Retrieved 10 November 2020.
  16. ^ a b c d e f "The Future of Transport: No loopy idea". The Economist. Vol. Print edition. 17 August 2013. Retrieved 16 August 2013.
  17. ^ Pensky, Nathan; Lacy, Sarah; Musk, Elon (12 July 2012). PandoMonthly Presents: A Fireside Chat with Elon Musk. PandoDaily/YouTube.com. Event occurs at 43:13. Retrieved 13 September 2012.
  18. ^ a b Elon Musk speaks at the Hyperloop Pod Award Ceremony. YouTube.com. 30 January 2016. Retrieved 2 February 2016.
  19. ^ Gannes, Liz (30 May 2013). "Tesla CEO and SpaceX Founder Elon Musk: The Full D11 Interview (Video)". All Things Digital. Retrieved 31 May 2013.
  20. ^ a b "Musk announces plans to build Hyperloop demonstrator". Gizmag.com. 13 August 2013. Retrieved 14 August 2013.
  21. ^ Musk, Elon (12 August 2013). "Hyperloop". Tesla. Retrieved 13 August 2013.
  22. ^ Flankl, Michael; Wellerdieck, Tobias; Tüysüz, Arda; Kolar, Johann W. (November 2017). "Scaling laws for electrodynamic suspension in high-speed transportation" (PDF). IET Electric Power Applications. 12 (3): 357–364. doi:10.1049/iet-epa.2017.0480. Archived from the original (PDF) on 26 January 2018. Retrieved 2 February 2018.
  23. ^ Energy Efficiency of an Electrodynamically Levitated Hyperloop Pod. Energy Science Center. 29 November 2017. Retrieved 2 February 2018.
  24. ^ Mendoza, Martha (12 August 2013). "Elon Musk to reveal mysterious 'Hyperloop' high-speed travel designs Monday". The Globe and Mail. Archived from the original on 13 August 2013. Retrieved 12 August 2013.
  25. ^ "Word Mark HYPERLOOP". U.S. Patent and Trademark Office. Retrieved 10 September 2017.
  26. ^ Muoio, Danielle (17 August 2017). "Everything we know about Elon Musk's ambitious Hyperloop plan". Business Insider. Retrieved 10 September 2017.
  27. ^ Wattles, Jackie (15 June 2015). "SpaceX to hold Hyperloop competition". CNN Money. CNN.
  28. ^ Baker, David R. (15 June 2015). "Build your own hyperloop! SpaceX announces pod competition". San Francisco Chronicle.
  29. ^ Chee, Alexander (30 November 2015). "The Race to Create Elon Musk's Hyperloop Heats Up". Wall Street Journal. Retrieved 21 January 2016.
  30. ^ Lee, Dave (14 May 2016). "Magnetic Hyperloop pod unveiled at MIT". BBC. Retrieved 1 February 2017.
  31. ^ Zimmerman, Leda (1 February 2016). "MIT students win first round of SpaceX Hyperloop contest". Retrieved 1 February 2017.
  32. ^ Hyperloop, MIT (30 January 2017). "MIT Hyperloop Flight Jan 29th 2017 - First Ever Low Pressure Hyperloop Run". Youtube. Retrieved 1 February 2017.
  33. ^ Pieters, Janene (30 January 2017). "Delft students win Elon Musk's hyperloop competition". NL Times. The Netherlands. Retrieved 17 April 2018.
  34. ^ a b c d "Hyperloop". SpaceX. 8 June 2015. Archived from the original on 31 August 2018. Retrieved 4 December 2019.
  35. ^ "Students from Munich in the final round of SpaceX Hyperloop Competition" (PDF) (Press release). 5 February 2016. Retrieved 16 November 2019.
  36. ^ "Here are the big winners of Elon Musk's Hyperloop pod competition". Business Insider Deutschland (in German). Retrieved 16 April 2018.
  37. ^ a b "Student group from Technical University of Munich sets new Hyperloop speed record and wins second SpaceX Pod Competition" (PDF) (Press release). 28 August 2017. Retrieved 16 November 2019.
  38. ^ a b "Hyperloop One Goes Farther and Faster Achieving Historic Speeds". Hyperloop One. Retrieved 16 April 2018.
  39. ^ a b "Here are the big winners from Elon Musk's Hyperloop competition". Business Insider. Retrieved 16 April 2018.
  40. ^ a b Hawkins, Andrew J. (22 July 2018). "WARR Hyperloop pod hits 284 mph to win SpaceX competition". The Verge. Retrieved 4 December 2019.
  41. ^ a b "TUM Hyperloop by NEXT Prototypes e.V." Retrieved 4 December 2019.
  42. ^ Taub, Eric A. (9 November 2020). "A Step Forward in the Promise of Ultrafast 'Hyperloops'". The New York Times. ISSN 0362-4331. Retrieved 5 April 2021.
  43. ^ De Chant, Tim (13 August 2013). "Promise and Perils of Hyperloop and Other High-Speed Trains". PBS.org. Nova Next. Retrieved 24 September 2013.
  44. ^ Ranger, Steve. "What is Hyperloop? Everything you need to know about the race for super-fast travel". ZDNet. Retrieved 18 April 2020.
  45. ^ a b c d Johnson, Matt (14 August 2013). "Musk's Hyperloop math doesn't add up". Greater Greater Washington.
  46. ^ Levy, Alon (13 August 2013). "Loopy Ideas Are Fine, If You're an Entrepreneur". Pedestrian Observations. Retrieved 2 February 2016.
  47. ^ Sinclair, James (12 August 2013). "Hyperloop proposal: Bad joke or attempt to sabotage California HSR project?". Stop and Move. Retrieved 2 February 2016.
  48. ^ Johnson, Matt (14 August 2013). "Musk's Hyperloop math doesn't add up". Greater Greater Washington. Retrieved 2 February 2016.
  49. ^ Humphreys, Pat (23 March 2016). "Pipedreams". Transport and Travel. Retrieved 24 March 2016.
  50. ^ Jenkins, Aric (14 November 2017). "A Guy Named Brogan BamBrogan Wants to Bring a 200 mph Hyperloop to Denver. Here's His Plan". Fortune. Retrieved 16 November 2017.
  51. ^ Bauer, Meredith Rutland (23 February 2018). "Who's Ready to Hyperloop to Cleveland?". CityLab. Retrieved 26 February 2018.
  52. ^ "Missouri Is One Step Closer to a Hyperloop with In-Depth Feasibility Study". hyperloop-one.com. Virgin Hyperloop One. 30 January 2018. Retrieved 28 March 2019.
  53. ^ Knapp, Alex (30 January 2018). "Plans Are Moving Forward To Bring A Hyperloop Route To Missouri". forbes.com. Retrieved 28 March 2019.
  54. ^ WELT (19 December 2018). ""Loop"-Projekt: Mit nur 80 km/h durch Elons Musks Turbo-Tunnel". DIE WELT. Retrieved 19 December 2018.
  55. ^ Walker, Alissa (18 December 2018). "Here's what it's like to ride in Elon Musk's tunnel". Curbed LA. Retrieved 18 April 2020.
  56. ^ "Hyperloop could bring new options".
  57. ^ technology, BENGALURU (7 December 2016). "India in talks to build Hyperloop; two Indian companies involved in the project". ET online. Retrieved 7 December 2016.
  58. ^ Reporter, B. S. (7 May 2018). "Hyperloop Technologies proposes 700-800 km project for AP in three phases". Business Standard India. Retrieved 14 January 2022.
  59. ^ "Mumbai-Pune 25-minute Hyperloop ride by 2024 could be a pipe dream". Moneycontrol.
  60. ^ "Brinkwire". en.brinkwire.com. Archived from the original on 25 February 2018. Retrieved 25 February 2018.
  61. ^ "DGWHyperloop - Overview" (PDF). 29 October 2016. Archived from the original (PDF) on 4 November 2016. Retrieved 14 January 2017.
  62. ^ "India to have its own Hyperloop system! Indian Railways to collaborate with IIT Madras". The Financial Express. India. 23 May 2022. Retrieved 1 June 2022.
  63. ^ a b "Saudi Arabia leads with world's first national hyperloop study". Saudigazette. 8 February 2020. Retrieved 15 June 2022.
  64. ^ ItalianPostNews (16 March 2022). "A Letexpo signed a protocol for the creation of Hyper Transfer". Italian Post. Retrieved 15 June 2022.
  65. ^ "Hyperloop One, FS Links And KPMG Publish World's First Study Of Full Scale Hyperloop System". PR Newswire. 5 July 2016.
  66. ^ "Hyperloop One gets $50 million in funding led by Dubai's DP World Group, one of the world's largest ports operators". LA Times. 12 October 2016. Retrieved 26 November 2016.
  67. ^ "Russland plant Hyperloop-Strecke zwischen Moskau und Sankt Petersburg". Deutsche Wirtschafts Nachrichten. 2 June 2016. Retrieved 3 June 2016.
  68. ^ "Hyperloop One Can Open Up Russia's Far East to China Trade | Hyperloop One". Hyperloop One. Retrieved 26 November 2016.
  69. ^ "Hyperloop One Global Challenge". Hyperloop One. Retrieved 11 October 2017.
  70. ^ Todd, Jeff (14 September 2017). "Hyperloop Becomes Closer To Reality In Colorado". CBS4. Retrieved 15 September 2017.
  71. ^ "Hyperloop One Global Challenge Winners". Hyperloop One. Retrieved 11 October 2017.
  72. ^ Eldering, Paul (17 April 2019). "Hyperloop krijgt vleugels: Schiphol - Frankfurt in halfuur" [Hyperloop develops wings: Schiphol - Frankfurt in half an hour]. De Telegraaf (in Dutch). The Netherlands. Retrieved 16 November 2019.
  73. ^ van Miltenburg, Olaf (23 January 2016). "TU Delft onthult Hyperloop-ontwerp - Vervoermiddel van de toekomst" [TU Delft unveils Hyperloop design - Means of transport of the future]. Tweakers.net (in Dutch). Retrieved 26 January 2016.
  74. ^ "Delft Hyperloop - Revealing the Future of Transportation". YouTube.com. 22 January 2016. Retrieved 26 January 2016.
  75. ^ Wedziuk, Emilia (17 February 2016). "Hyperloop made in Poland gets more and more realistic". ITkey Media (in Polish). Retrieved 24 February 2016.
  76. ^ Bambury, Brent (16 September 2016). "Toronto to Montreal in less than 30 minutes? How a Canadian company plans to make it happen". CBC Radio. Canada. Retrieved 7 November 2016.
  77. ^ "Rapid Transit". CBC. CBC. 18 September 2017. Retrieved 4 October 2017.
  78. ^ Aboelsaud, Yasmin (26 July 2017). "Toronto tech company proposes Toronto-Windsor hyperloop connection". Daily Hive. Retrieved 4 October 2017.
  79. ^ "Calgary to Edmonton in 30 minutes? Hyperloop could be the future of transportation in Alberta". CBC. CBC. 7 April 2017. Retrieved 4 October 2017.
  80. ^ "The Busiest Highway in North America". Opposite Lock. US. 6 April 2014. Archived from the original on 12 November 2019. Retrieved 7 November 2016.
  81. ^ Aboelsaud, Yasmin (4 April 2019). "Virgin Hyperloop One: New transit technology could be here in years not decades". Daily Hive. Retrieved 8 April 2019.
  82. ^ Guerrini, Federico (10 March 2016). "Crowdsourced Hyperloop Venture Inks A Deal With... Bratislava?". Forbes. Retrieved 12 March 2016.
  83. ^ Buhr, Sarah (18 January 2017). "Hyperloop Transportation Technologies plans to connect all of Europe, starting with the Czech Republic". TechCrunch. US. Retrieved 23 January 2017.
  84. ^ "Sintef vil teste hyperloop for laks" [Sintef will test the hyperloop for salmon]. Dagens Næringsliv AS (in Norwegian). Norway. 18 December 2017. Retrieved 23 January 2018.
  85. ^ Madslien, Jørn (19 July 2017). "Investment in hyperloop routes speeds up". UK: Institute of Mechanical Engineers. Retrieved 11 August 2017.
  86. ^ Davies, Alex (20 June 2017). "South Korea Is Building a Hyperloop". Wired. US. Retrieved 16 March 2019.
  87. ^ Williams, Matt (3 July 2017). "Mars Compared to Earth". Universe Today. Retrieved 27 September 2017.
  88. ^ Vanstone, Leon (13 July 2015). "Elon Musk's high-speed Hyperloop train makes more sense for Mars than California". The Conversation. Retrieved 2 February 2016.
  89. ^ Muoio, Danielle (6 February 2016). "Elon Musk talks Hyperloop on Mars". Tech Insider. Retrieved 4 March 2016.
  90. ^ Williams, Matt (12 February 2016). "Musk Says Hyperloop Could Work On Mars... Maybe Even Better!". Universe Today. Retrieved 26 February 2016.
  91. ^ Danigelis, Alyssa (20 September 2013). "Hyperloop Simulation Shows It Could Work". Discovery News. Retrieved 21 September 2013.
  92. ^ Statt, Nick (19 September 2013). "Simulation verdict: Elon Musk's Hyperloop needs tweaking". CNET News. Retrieved 21 September 2013.
  93. ^ "Hyperloop in OpenMDAO". OpenMDAO. 9 October 2013. Retrieved 9 October 2013.
  94. ^ "Future Modeling Road Map". OpenMDAO. 9 October 2013. Retrieved 4 January 2014.
  95. ^ "Hyperloop: Not So Fast". MathWorks. 22 November 2013. Retrieved 5 December 2013.
  96. ^ Chin, Jeffrey C.; Gray, Justin S.; Jones, Scott M.; Berton, Jeffrey J. (January 2015). Open-Source Conceptual Sizing Models for the Hyperloop Passenger Pod (PDF). 56th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. 5–9 January 2015. Kissimmee, Florida. doi:10.2514/6.2015-1587. hdl:2060/20150000699. Archived from the original (PDF) on 2 April 2015.
  97. ^ Morris, David Z. (31 January 2016). "MIT Wins Hyperloop Competition, And Elon Musk Drops In". Fortune. Retrieved 1 February 2016.
  98. ^ Musk, Elon (30 January 2016). Elon Musk speaks at the Hyperloop Pod Award Ceremony. YouTube.com. Retrieved 3 June 2016.
  99. ^ Opgenoord, Max M. J.; Caplan, Philip C. (5 June 2017). On the Aerodynamic Design of the Hyperloop Concept (PDF). 35th AIAA Applied Aerodynamics Conference. US: AIAA. doi:10.2514/6.2017-3740.
  100. ^ Egli, Dane (31 July 2017). "Hyperloop will improve transportation and national security". Baltimore Sun. Retrieved 26 August 2017.
  101. ^ D'Silva, Krishtina (13 February 2020). "European countries to set up JTC20 to regulate hyperloop travel systems". Urban Transport News.
  102. ^ "TUM launches hyperloop research program". www.tum.de. Retrieved 21 May 2021.
  103. ^ "Bavaria boosts the Hyperloop vision". www.tum.de. Retrieved 21 May 2021.
  104. ^ Stadler, Helmut (13 December 2018). "Hyperloop kommt ins Unterwallis". Neue Zuercher Zeitung. Retrieved 21 May 2021.
  105. ^ AG, DV Bern. "EuroTube Foundation". Commercial register of Bas-Valais. Retrieved 21 May 2021.
  106. ^ a b Hawkins, Andrew J. (30 January 2016). "MIT wins SpaceX's Hyperloop competition, and Elon Musk made a cameo". The Verge. Retrieved 31 January 2016.
  107. ^ Boyle, Alan (15 June 2015). "Elon Musk's SpaceX Plans Hyperloop Pod Races at California HQ in 2016". NBC. Retrieved 15 June 2015.
  108. ^ "Spacex Hyperloop Pod Competition" (PDF). SpaceX. June 2015. Retrieved 16 June 2015.
  109. ^ "Hyperloop". SpaceX. Space Exploration Technologies. 9 June 2015. Retrieved 15 June 2015.
  110. ^ Thompson, Cadie (23 June 2015). "More than 700 people have signed up to help Elon Musk build a Hyperloop prototype". Business Insider. Retrieved 28 June 2015.
  111. ^ "Hyperloop Competition Rules, v2.0" (PDF). SpaceX. 20 October 2015. Retrieved 1 November 2015.
  112. ^ Boyle, Alan (15 December 2015). "More than 120 teams picked for SpaceX founder Elon Musk's Hyperloop contest". Geekwire.com. Retrieved 16 December 2015.
  113. ^ "SpaceX Design Weekend at Texas A&M University". Dwight Look College of Engineering, Texax A&M. Texas A&M University. Archived from the original on 12 September 2015. Retrieved 1 November 2015.
  114. ^ Kleinman, Jacob (1 February 2016). "Hyperloop competition winners announced, see the top design". TechnoBuffalo. Retrieved 19 February 2016.
  115. ^ "Hyperloop: MIT students win contest to design Elon Musk's 700mph travel pods". The Guardian. Associated Press. 30 January 2016. Retrieved 19 February 2016.
  116. ^ "Awards". Texas A & M University College of Engineering. 2017. Retrieved 10 September 2017.
  117. ^ "TU Delft students win Hyperloop Pod Competition". The Netherlands: Delft University of Technology. 30 January 2017. Retrieved 3 June 2017.
  118. ^ Murphy, Meg (14 February 2017). "Safe at any speed". MIT News. Cambridge, MA, USA. Retrieved 29 August 2017.
  119. ^ Blodget, Henry (20 August 2013). "Transport Blogger Ridicules The Hyperloop – Says It Will Cost A Fortune And Be A Terrifying 'Barf Ride'". Business Insider.
  120. ^ Brandom, Russell (16 August 2013). "Speed bumps and vomit are the Hyperloop's biggest challenges". The Verge.
  121. ^ McCurry, Justin (21 April 2015). "Japan's maglev train breaks world speed record with 600km/h test run". The Guardian.
  122. ^ a b Wolverton, Troy (13 August 2013). "Wolverton: Elon Musk's Hyperloop hype ignores practical problems". The Mercury News. Retrieved 15 September 2016.
  123. ^ Salam, Reihan (9 August 2011). "Alon Levy on Politicals vs. Technicals". National Review. Retrieved 29 September 2013.
  124. ^ a b Plumer, Brad (13 August 2013). "There is no redeeming feature of the Hyperloop". The Washington Post.
  125. ^ Matt McFarland. "Hyperloop wants to change the world. Not everyone's convinced". CNN. Retrieved 22 November 2020.
  126. ^ Han, Yoonji (22 February 2022). "Virgin Hyperloop lays off half of its employees as it pivots away from passenger travel". Business Insider. US. Retrieved 6 May 2022.
  127. ^ O'Kane, Sean (14 December 2018). "Hyperloop startup Arrivo is shutting down as workers are laid off". The Verge.{{cite web}}: CS1 maint: url-status (link)
  128. ^ Wedziuk, Emilia (17 February 2016). "Hyperloop made in Poland gets more and more realistic". ITKeyMedia. Retrieved 23 October 2021.
  129. ^ Anderson, Chris C. (15 July 2013). "If Elon Musk's Hyperloop Sounds Like Something Out Of Science Fiction, That's Because It Is". Business Insider. Retrieved 14 August 2013.
  130. ^ Beach, Alfred Ely (5 March 1870). "The Pneumatic Tunnel Under Broadway, N.Y.". Scientific American. 22 (10): 154–156. doi:10.1038/scientificamerican03051870-154.
  131. ^ "History". Swissmetro.ch. Archived from the original on 18 August 2013. Retrieved 14 August 2013.
  132. ^ Frey, Thomas (30 October 2013). "Competing for the World's Largest Infrastructure Project: Over 100 Million Jobs at Stake". Futurist Speaker. Archived from the original on 6 October 2014. Retrieved 28 September 2014.
  133. ^ Svaldi, Aldo (9 August 2013). "Longmont entrepreneur has tubular vision on future of transportation". The Denver Post.
  134. ^ "The Hyperloop that never was". Sifted. Archived from the original on 5 May 2021. Retrieved 26 August 2021.
  135. ^ Murph, Darren (4 August 2010). "China's maglev trains to hit 1,000km/h in three years". Engadget.
  136. ^ "China testing super-maglev train that runs at 1,000 km/h". People's Daily Online. 11 March 2018. Retrieved 26 August 2021.
  137. ^ Rudowski, Michał (March 2018). "Intermodalny transport kapsuł Hyperloop – koncepcja, wymagania, korzyści" [Intermodal transport of Hyperloop capsules – concept, requirements, benefits] (PDF). Railway Reports (in Polish) (178). Retrieved 4 October 2021.

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