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Concept art of Hyperloop inner workings

A hyperloop is a proposed mode of passenger and/or freight transportation, first used to describe an open-source vactrain design released by a joint team from Tesla and SpaceX.[1] Drawing heavily from Robert Goddard's vactrain, a hyperloop comprises a sealed tube or system of tubes through which a pod may travel free of air resistance or friction conveying people or objects at optimal[clarification needed] speed and acceleration.

Elon Musk's version of the concept, first publicly mentioned in 2012,[2] incorporates reduced-pressure tubes in which pressurized capsules ride on air bearings driven by linear induction motors and air compressors.[3]

The Hyperloop Alpha concept was first published in August 2013, proposing and examining a route running from the Los Angeles region to the San Francisco Bay Area roughly following the Interstate 5 corridor. The paper conceived of a hyperloop system that would propel passengers along the 350-mile (560 km) route at an average speed of around 600 mph (970 km/h), with a top speed of 760 mph (1,200 km/h), allowing for a travel time of 35 minutes, which is considerably faster than current rail or air travel times. Preliminary cost estimates for this LA–SF suggested route were included in the white paper—US$6 billion for a passenger-only version, and US$7.5 billion for a somewhat larger-diameter version transporting passengers and vehicles[1] — although transportation analysts had doubts that the system could be constructed on that budget; some analysts claimed that the Hyperloop would be several billion dollars overbudget, taking into consideration construction, development and operation costs.[4][5][6]

The Hyperloop concept has been explicitly "open-sourced" by Musk and SpaceX, and others have been encouraged to take the ideas and further develop them.

To that end, a few companies have been formed, and several interdisciplinary student-led teams are working to advance the technology.[7] SpaceX is building an approximately 1-mile-long (1.6 km) subscale track for its pod design competition at its headquarters in Hawthorne, California.[8]

Some experts are skeptical, saying that the proposals ignore the expenses and risks of developing the technology and that the idea is "completely impractical".[9] Claims have also been made that the Hyperloop is too susceptible to disruption from a power outage or terror attacks to be considered safe.[9]

Contents

HistoryEdit

The general idea of trains or other transportation traveling through evacuated tubes dates back more than a century, although the atmospheric railway was never a commercial success.

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.[10] 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.[11] In May 2013, Musk likened the Hyperloop to a "cross between a Concorde and a railgun and an air hockey table".[12]

From late 2012 until August 2013, a group of engineers from both Tesla and SpaceX worked on the conceptual modeling of Hyperloop.[13] An early system design was published in the Tesla and SpaceX blogs[1][14] which describes one potential design, function, pathway, and cost of a hyperloop system.[1] According to the alpha design, pods would accelerate to cruising speed gradually using a linear electric motor 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, 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.[15] The word mark "HYPERLOOP", applicable to "high-speed transportation of goods in tubes" was issued to SpaceX on April 4, 2017.[16][17]

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 would be used to test pod designs supplied by third parties in the competition.[18][19]

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."[20]

The MIT Hyperloop team developed the first Hyperloop pod prototype, which they unveiled at the MIT Museum on May 13, 2016. Their design was based on electrodynamic suspension for levitating and used eddy current braking.[21]

On January 29, 2017, approximately one year after winning phase one of the Hyperloop pod competition,[22] the MIT Hyperloop pod demonstrated the first ever low-pressure Hyperloop run in the world.[23]

Theory and operationEdit

 
Artist's impression of a Hyperloop capsule: Air 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 the Hyperloop infrastructure. The steel tubes are rendered transparent in this image.

Developments in high-speed rail have historically been impeded by the difficulties in managing friction and air resistance, both of which become substantial when vehicles approach high speeds. The vactrain concept theoretically eliminates these obstacles by employing magnetically levitating trains in evacuated (airless) or partly evacuated tubes, allowing for speeds of thousands of miles per hour. However, the high cost of maglev and the difficulty of maintaining a vacuum over large distances has prevented this type of system from ever being built. The Hyperloop resembles a vactrain system but operates at approximately one millibar (100 Pa) of pressure.[24]

Initial design conceptEdit

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 floats 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 suspended in an air hockey table, while still allowing for speeds that wheels cannot sustain. Hyperloop One's technology uses passive maglev for the same purpose. Linear induction motors located along the tube would accelerate and decelerate the capsule to the appropriate speed for each section of the tube route. With rolling resistance eliminated and air resistance greatly reduced, the capsules can glide for the bulk of the journey. In Musk's original Hyperloop concept, an electrically driven inlet fan and air 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.[1] A fraction of the air is shunted to the skis for additional pressure, augmenting that gain passively from lift due to their shape. Hyperloop One's system does away with the compressor.

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

Proposed routesEdit

 
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.

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.[1]

Many of the active Hyperloop routes being planned currently are outside of the U.S. 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.[25] Hyperloop One is also well underway on a feasibility study with DP World to move containers from its Port of Jebel Ali in Dubai.[26] Hyperloop One on November 8, 2016 announced a new feasibility study with Dubai's Roads and Transport Authority for passenger and freight routes connecting Dubai with the greater United Arab Emirates. Hyperloop One is also working on passenger routes in Moscow[27][28] 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.[29] In May 2016, Hyperloop One kicked off their Global Challenge with a call for comprehensive proposals of hyperloop networks around the world.[30] In September 2017, Hyperloop One selected 10 routes from 35 of the strongest proposals: Toronto-Montreal, Cheyenne-Denver-Pueblo, Miami-Orlando, Dallas-Laredo-Houston, Chicago-Columbus-Pittsburgh, Mexico City-Guadalajara, Edinburgh-London, Glasgow-Liverpool, Bengaluru-Chennai and Mumbai-Chennai.[31][32]

Others have put forward European routes, including a Paris to Amsterdam route proposed by Delft Hyperloop.[33][34] A Warsaw University of Technology team is evaluating potential routes from Cracow to Gdańsk across Poland proposed by Hyper Poland.[35]

TransPod is exploring the possibility of Hyperloop routes which would connect Toronto and Montreal,[36][37] Toronto to Windsor,[38] and Calgary to Edmonton.[39] Toronto and Montreal, the largest cities in Canada, are currently connected by the Highway 401, the busiest highway in North America.[40]

No work has been done on the route proposed in Musk's alpha-design, with one cited reason being 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.[41]

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.[42][43][44] Passengers travelling financial centre to financial centre are estimated to save about two hours by taking the Hyperloop instead of driving the whole distance.[45]

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.[4][5][6][41]

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 developments on that since.[46] In January 2017, HTT signed an agreement to explore the route BratislavaBrnoPrague in Central Europe.[47]

HTT are also in process to sign a Letter of Intent with the Indian Government for a proposed route between Chennai and Bengaluru. If things go as planned, the distance of 345 km could be covered in 30 minutes.[48] Indore-based Dinclix GroundWorks' DGWHyperloop advocates a Hyperloop corridor between Mumbai and Delhi, passing via Indore, Kota and Jaipur.[49] HTT also signed an agreement with Andhra Pradesh government to build India's first Hyperloop project connecting Amaravathi to Vijayawada in a 6 min ride.

Open-source design evolutionEdit

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.[50][51]

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,[52] 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 technological factors required to physically construct a Hyperloop based on Musk's concept, and in particular had no significant estimations of component weight.[53]

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.[54]

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.[55]

According to Musk, various aspects of the Hyperloop have technology applications to other Musk interests, including surface transportation on Mars and electric jet propulsion.[56][57]

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.[58]

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.[59]

MarsEdit

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.[60][11][61][62] 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.[63]

Hyperloop companiesEdit

Virgin Hyperloop OneEdit

Hyperloop One, formerly Hyperloop Technologies,[64] was incorporated in 2014 and has built a team of 280+, including engineers, technicians, welders and machinists. It has raised more than US$160 million in capital from investors including DP World, Sherpa Capital, Formation 8, 137 Ventures, Caspian Venture Capital, Fast Digital, GE Ventures, and SNCF.

Hyperloop One was founded by Shervin Pishevar and Brogan BamBrogan.[65] BamBrogan left the company in July 2016,[66] along with three of the other founding members of Arrivo.[67] Hyperloop One then selected Josh Giegel, a former SpaceX engineer, to be a co-founder.[68]

Hyperloop One has a 75,000-square foot Innovation Campus in downtown LA and a 100,000-square foot machine and tooling shop in North Las Vegas. It has currently completed a 500m Development Loop (DevLoop) in North Las Vegas, Nevada.[69]

On May 11, 2016, Hyperloop One conducted the first live trial of Hyperloop technology, demonstrating that its custom linear electric motor could propel a sled from 0 to 110 miles an hour in just over one second.[70] The acceleration exerted approximately 2.5 g on the sled. The sled was stopped at the end of the test by hitting a pile of sand at the end of the track, because the test was not intended to test braking components.[71]

In July 2016, Hyperloop One released a preliminary study that suggested a Hyperloop connection between Helsinki and Stockholm would be feasible, reducing the travel time between the cities to half an hour. The construction costs were estimated by Hyperloop One to be around €19 billion (US$21 billion at 2016 exchange rates).[72]

In August 2016, Hyperloop One announced a deal with the world's third largest ports operator, DP World, to develop a cargo offloader system at DP World's flagship port of Jebel Ali in Dubai.[73] Hyperloop One also broke ground on DevLoop, its full-scale Hyperloop test track.

In November 2016, Hyperloop One disclosed that it has established a high-level working group relationship with the governments of Finland and the Netherlands to study the viability of building Hyperloop proof of operations centers in those countries. Hyperloop One also has a feasibility study underway with Dubai's Roads and Transport Authority for passenger systems in the UAE.[74] Other feasibility studies are underway in Russia, Los Angeles and the Netherlands.

In May 12, 2017, Hyperloop One performed its first full-scale Hyperloop test, becoming the first company in the world to test a full-scale Hyperloop.[75] The system-wide test integrated Hyperloop components including vacuum, propulsion, levitation, sled, control systems, tube, and structures.

On July 12, 2017, the company revealed images of its first generation pod prototype, which will be used at the DevLoop test site in Nevada to test aerodynamics.[76]

On October 12, 2017, the company received a "significant investment" from the Virgin Group founder Richard Branson, leading to a rebrand of the name.[77]

Hyperloop Transportation TechnologiesEdit

Hyperloop Transportation Technologies (HTT) is a group of more than 800 engineers and professionals located around the world. Some collaborate part-time; others are full-time employees and contributors. Some members are full-time paid employees; others work in exchange for salary and stock options.

HTT announced in May 2015 that a deal had been finalized with landowners to build a 5-mile (8 km) test track along a stretch of road near Interstate 5 between Los Angeles and San Francisco.[78] In December 2016, Hyperloop Transportation Technologies and the government of Abu Dhabi announced plans to conduct a feasibility study on a Hyperloop link between the UAE capital and Al Ain, reducing travel time between Abu Dhabi and Al Ain to just under 10-minutes.[79] In September 2017 HTT announced and signed an agreement with the Andhra Pradesh government to build a track from Amaravathi to Vijayawada,and it will be a 6 min ride.[citation needed]

TransPodEdit

TransPod Inc. is a Canadian company designing and manufacturing ultra-high-speed tube transportation technology and vehicles.[80] In November 2016 TransPod raised a $15 million USD seed round from Angelo Investments, an Italian high-tech holding group, specializing in advanced technologies for the railway, space, and aviation industries.[81]

In September 2017, TransPod released a scientific peer-reviewed publication in the journal Procedia Engineering.[82] The paper was premiered at the EASD EURODYN 2017 conference,[83] and presents the physics of the TransPod system.[84]

TransPod vehicles are being designed to travel at over 1000 km/h between cities using fully electric propulsion and zero need for fossil fuels.[84] The TransPod tube system is distinct from the hyperloop concept proposed by Elon Musk’s Hyperloop Alpha white paper. The TransPod system uses moving electromagnetic fields to propel the vehicles with stable levitation off the bottom surface, rather than compressed air.[84] TransPod is stated to contain further developments beyond hyperloop.[85][86] To achieve fossil-fuel-free propulsion, TransPod “pods” take advantage of electrically-driven linear induction motor technology, with active real-time control[84] and sense-space systems.[87] The cargo transport TransPod pods will be able to carry payloads of 10-15 tons and have compatibility with wooden pallets, as well as various unit load devices such as LD3 containers, and AAA containers.[88]

At the InnoTrans Rail Show 2016 in Berlin, TransPod premiered their vehicle concept, alongside implementation of Coelux technology - an artificial skylight to emulate natural sunlight within the passenger pods.[89][90]

TransPod has partnered with investor Angelo Investments' member companies MERMEC, SITAEL and Blackshape Aircraft. With international staff of over 1,000 employees, 650 of whom are engineers, they will collaborate with the development and testing of the TransPod tube system[91][92][81] It has since expanded from its Toronto, Canada headquarters at MaRS Discovery District[93][94] to open offices in Toulouse, France and Bari, Italy.[95][96] TransPod is additionally partnered with university researchers, engineering firm IKOS,[97] REC Architecture and Liebherr-Aerospace.[98][99][100]

TransPod is developing routes worldwide and in Canada such as Toronto-Montreal,[101][37][102] Toronto-Windsor,[38] and Calgary-Edmonton.[39] TransPod is preparing to build a test track for the pod vehicles in Canada.[103] This track will be extendable as part of a full route pending a combination of private and public funding to construct the line.[39]

In July 2017, TransPod released an initial cost study[104] which outlines the viability of building a hyperloop line in Southwestern Ontario between the cities of Windsor and Toronto.[105] The study indicates a TransPod tube system would cost half the projected cost of a high-speed rail line along the same route, while operating at more than four times the top speed of high speed rail.[104]

DGWHyperloopEdit

Established in 2015, DGWHyperloop is a subsidiary of Dinclix GroundWorks, an engineering company based in Indore, India.[106] DGWHyperloop's initial proposals include a Hyperloop-based corridor between Delhi and Mumbai called the Delhi Mumbai Hyperloop Corridor (DMHC).[107][108] The company has partnered with many government agencies, private companies and institutions for its research on Hyperloop.[109] DGWHyperloop is the only Indian company working on implementing the Hyperloop system across the nation.[110][111][112]

ArrivoEdit

Arrivo is a technology architecture and engineering company founded in Los Angeles in 2016.[113] With an early focus on "making hyperloops cheap to use and profitable to operate",[114] Arrivo aims to shift the transportation industry into a mode of arrival.[115] In November 2017, it announced the move away from the vacuum tubes essential to hyperloop technology, and disclosed a plan to build a 200 mph link for automobiles to Denver International Airport using maglev train technology by 2021.[116]

Hardt Global MobilityEdit

Hardt Global Mobility[117] was founded in 2016 in Delft, emerging from the TU Delft Hyperloop team who won at the SpaceX Pod Competition.[118]

The Dutch team is setting up a full-scale testing center for hyperloop technology in Delft. Hardt has received over €600,000 in funding for the initial rounds of testing, with plans to raise more to build a high-speed test line by 2019.[119] At the unveiling of the test track, Dutch Minister of Infrastructure and Environment Schultz van Haegen said a Hyperloop system could help cement the Netherlands' position as a gateway to Europe by transporting freight arriving at Rotterdam's sprawling port.[120]

In October 9, 2017 a report was released with information from Hardt Global Mobility and Hyperloop One. The report has been sent to the Dutch House of Representatives and judges the added value of a hyperloop test track facility. The report reccomends building a test track of 5 km in Flevoland.[121]

Hyper ChariotEdit

Hyper Chariot is a startup company based in Santa Monica, United States, that began promoting itself in June 2017. The company has an ambitious plan.[122] On July 27, 2017 it announced a partnership with AML Superconductivity and Magnetics for the development of the vehicle and related propulsion system.[123]

Hyperloop pod competitionEdit

 
Hyperloop pod competition

A number of student and non-student teams are participating in a Hyperloop pod competition in 2015–16, and at least 22 of them will build hardware to compete on a sponsored hyperloop test track in mid-2016.[124]

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.[125][126] 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."[127]

More than 700 teams had submitted preliminary applications by July,[128] and detailed competition rules were released in August.[129] 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 January 13, 2016.[130]

A Design Weekend was held at Texas A&M University January 29–30, 2016, for all invited entrants.[131] Engineers from the Massachusetts Institute of Technology were named the winners of the competition. Finishing second was Delft University of Technology from the Netherlands, followed by the University of Wisconsin–Madison, Virginia Tech, and the University of California, Irvine.[124][132] While the MIT team took best overall, Delft University won the Pod Innovation Award.[133] In the Design Category, the winner team was Hyperloop UPV from Universitat Politecnica de Valencia, Spain.[134] On January 29, 2017, Delft Hyperloop (Delft University of Technology) won the final stage of the SpaceX Hyperloop competition,[135] ahead of the Technical University of Munich and Massachusetts Institute of Technology.[136]

Criticism and human factor considerationsEdit

Some critics of Hyperloop focus on the experience—possibly unpleasant and frightening—of riding in a narrow, sealed, and 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.[137] 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.[138] 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.

There is also the criticism of design technicalities in the tube system. Prof. John Hansman 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. Prof. 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.[9]

Political and economic considerationsEdit

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;[1] however, other commentators contend that a smaller footprint does not guarantee less opposition.[41] In criticizing this assumption, mass transportation writer Alon Levy said,[139] "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".[140] Michael Anderson, a professor of agricultural and resource economics at UC Berkeley, predicted that costs would amount to around US$100 billion.[5]

The Hyperloop white paper suggests that US$20 of each one-way passenger ticket between Los Angeles and San Francisco would be sufficient to cover initial capital costs, based on amortizing the cost of Hyperloop over 20 years with ridership projections of 7.4 million per year in each direction and does not include operating costs (although the proposal asserts that electric costs would be covered by solar panels). No total ticket price was suggested in the alpha design.[1] The projected ticket price has 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."[5]

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.[4][5][41][140] 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."[141]

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.[141] 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.[141]

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.[13][141]

The solar panels Musk plans to install along the length of the Hyperloop system have been criticized by Prof. Roger Goodall, 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.[9]

Related projectsEdit

HistoricalEdit

The concept of transportation of passengers in pneumatic tubes is not new. The first patent to transport goods in tubes was taken out 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.[142]

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

One of the earliest 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 somewhat lower pressure was maintained on the front of the car.[143]

In the 1910s, vacuum trains were first described by American rocket pioneer Robert Goddard.[141] 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".[3]

Princeton Physicist Gerard K. O'Neill wrote about transcontinental trains using magnetic propulsion in his book "2081: A Hopeful View of the Human Future". While 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 underground tunnels which had much of the air evacuated to increase speed and reduce friction. He also demonstrated a scale prototype device that accelerated a mass 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.[144]

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 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.[145] As of May 2017, it has not been built.

CurrentEdit

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 September 18, 2013, to discuss the technology,[146] resulting in Musk promising an investment in a 3-mile (5 km) prototype of ET3's proposed design.[147][needs update]

In popular cultureEdit

There are multiple examples of depressurized tubes in literature and media going back to the nineteenth century. Harry Harrison's 1972 book Tunnel Through the Deeps is an early steampunk book that gives explicit details about how such a system would work both on land and at sea - including the use of underwater bridges to float the tubes across the depths beyond the continental shelf. Gene Roddenberry's follow-on to Star Trek, Genesis II, used a very similar concept – called a "subshuttle" in the program – to move characters from place to place quickly.

See alsoEdit

ReferencesEdit

  1. ^ a b c d e f g h i j Musk, Elon (August 12, 2013). "Hyperloop Alpha" (PDF). SpaceX. Retrieved August 13, 2013. 
  2. ^ "Pando Monthly presents a fireside chat with Elon Musk". pando.com. PandoDaily. Retrieved July 15, 2017. 
  3. ^ a b "Beyond the hype of Hyperloop: An analysis of Elon Musk's proposed transit system". Gizmag.com. August 22, 2013. Retrieved August 23, 2013. 
  4. ^ a b c Bilton, Nick. "Could the Hyperloop Really Cost $6 Billion? Critics Say No". The New York Times. Retrieved August 18, 2013. 
  5. ^ a b c d e Brownstein, Joseph (August 14, 2013). "Economists don't believe the Hyperloop". Al Jazeera America. 
  6. ^ a b Melendez, Eleazar David (August 14, 2013). "Hyperloop Would Have 'Astronomical' Pricing, Unrealistic Construction Costs, Experts Say". The Huffington Post. 
  7. ^ Hawkins, Andrew J. (June 18, 2016). "Here are the Hyperloop pods competing in Elon Musk's big race later this year". The Verge. Retrieved October 19, 2016. 
  8. ^ Etherington, Darrell (September 2, 2016). "Here's a first look at the SpaceX Hyperloop test track". TechCrunch. 
  9. ^ a b c d Wolverton, Troy (August 13, 2013). "Wolverton: Elon Musk's Hyperloop hype ignores practical problems". The Mercury News. Retrieved September 15, 2016. 
  10. ^ Pensky, Nathan; Lacy, Sarah; Musk, Elon (July 12, 2012). PandoMonthly Presents: A Fireside Chat with Elon Musk. PandoDaily/YouTube.com. Event occurs at 43:13. Retrieved September 13, 2012. 
  11. ^ a b Elon Musk speaks at the Hyperloop Pod Award Ceremony. YouTube.com. January 30, 2016. Retrieved February 2, 2016. 
  12. ^ Gannes, Liz (May 30, 2013). "Tesla CEO and SpaceX Founder Elon Musk: The Full D11 Interview (Video)". All Things Digital. Retrieved May 31, 2013. 
  13. ^ a b "Musk announces plans to build Hyperloop demonstrator". Gizmag.com. August 13, 2013. Retrieved August 14, 2013. 
  14. ^ Musk, Elon (August 12, 2013). "Hyperloop". Tesla. Retrieved August 13, 2013. 
  15. ^ Mendoza, Martha (August 12, 2013). "Elon Musk to reveal mysterious 'Hyperloop' high-speed travel designs Monday". The Globe and Mail. Archived from the original on August 13, 2013. Retrieved August 12, 2013. 
  16. ^ "Word Mark HYPERLOOP". U.S. Patent and Trademark Office. Retrieved September 10, 2017. 
  17. ^ Muoio, Danielle (August 17, 2017). "Everything we know about Elon Musk's ambitious Hyperloop plan". Business Insider. Retrieved September 10, 2017. 
  18. ^ Wattles, Jackie (June 15, 2015). "SpaceX to hold Hyperloop competition". CNN Money. CNN. 
  19. ^ Baker, David R. (June 15, 2015). "Build your own hyperloop! SpaceX announces pod competition". San Francisco Chronicle. 
  20. ^ Chee, Alexander (November 30, 2015). "The Race to Create Elon Musk's Hyperloop Heats Up". Wall Street Journal. Retrieved January 21, 2016. 
  21. ^ Lee, Dave (May 14, 2016). "Magnetic Hyperloop pod unveiled at MIT". BBC. Retrieved February 1, 2017. 
  22. ^ Zimmerman, Leda (February 1, 2016). "MIT students win first round of SpaceX Hyperloop contest". Retrieved February 1, 2017. 
  23. ^ Hyperloop, MIT (January 30, 2017). "MIT Hyperloop Flight Jan 29th 2017 - First Ever Low Pressure Hyperloop Run". Youtube. Retrieved February 1, 2017. 
  24. ^ De Chant, Tim (August 13, 2013). "Promise and Perils of Hyperloop and Other High-Speed Trains". PBS.org. Nova Next. Retrieved September 24, 2013. 
  25. ^ "Hyperloop One, FS Links And KPMG Publish World's First Study Of Full Scale Hyperloop System". PR Newswire. July 5, 2016. 
  26. ^ "Hyperloop One gets $50 million in funding led by Dubai's DP World Group, one of the world's largest ports operators". LA Times. October 12, 2016. Retrieved November 26, 2016. 
  27. ^ "0 to 400mph in 2 seconds? Russian Railways eyes supersonic Hyperloop technology". RT. May 19, 2016. Retrieved June 3, 2016. 
  28. ^ "Russland plant Hyperloop-Strecke zwischen Moskau und Sankt Petersburg". Deutsche Wirtschafts Nachrichten. June 2, 2016. Retrieved June 3, 2016. 
  29. ^ "Hyperloop One Can Open Up Russia's Far East to China Trade | Hyperloop One". Hyperloop One. Retrieved November 26, 2016. 
  30. ^ "Hyperloop One Global Challenge". Hyperloop One. Retrieved October 11, 2017. 
  31. ^ Todd, Jeff (September 14, 2017). "Hyperloop Becomes Closer To Reality In Colorado". CBS4. Retrieved September 15, 2017. 
  32. ^ "Hyperloop One Global Challenge Winners". Hyperloop One. Retrieved October 11, 2017. 
  33. ^ van Miltenburg, Olaf (January 23, 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 January 26, 2016. 
  34. ^ "Delft Hyperloop - Revealing the Future of Transportation". YouTube.com. January 22, 2016. Retrieved January 26, 2016. 
  35. ^ Wedziuk, Emilia (February 17, 2016). "Hyperloop made in Poland gets more and more realistic". ITkey Media (in Polish). Retrieved February 24, 2016. 
  36. ^ Bambury, Brent (September 16, 2016). "Toronto to Montreal in less than 30 minutes? How a Canadian company plans to make it happen". CBC Radio. Canada. Retrieved November 7, 2016. 
  37. ^ a b "Rapid Transit". CBC. CBC. September 18, 2017. Retrieved October 4, 2017. 
  38. ^ a b Aboelsaud, Yasmin (July 26, 2017). "Toronto tech company proposes Toronto-Windsor hyperloop connection". Daily Hive. Retrieved October 4, 2017. 
  39. ^ a b c "Calgary to Edmonton in 30 minutes? Hyperloop could be the future of transportation in Alberta". CBC. CBC. April 7, 2017. Retrieved October 4, 2017. 
  40. ^ "The Busiest Highway in North America". Opposite Lock. US. April 6, 2014. Retrieved November 7, 2016. 
  41. ^ a b c d Johnson, Matt (August 14, 2013). "Musk's Hyperloop math doesn't add up". Greater Greater Washington. 
  42. ^ Levy, Alon (August 13, 2013). "Loopy Ideas Are Fine, If You're an Entrepreneur". Pedestrian Observations. Retrieved February 2, 2016. 
  43. ^ Sinclair, James (August 12, 2013). "Hyperloop proposal: Bad joke or attempt to sabotage California HSR project?". Stop and Move. Retrieved February 2, 2016. 
  44. ^ Johnson, Matt (August 14, 2013). "Musk's Hyperloop math doesn't add up". Greater Greater Washington. Retrieved February 2, 2016. 
  45. ^ Humphreys, Pat (March 23, 2016). "Pipedreams". Transport and Travel. Retrieved March 24, 2016. 
  46. ^ Guerrini, Federico (March 10, 2016). "Crowdsourced Hyperloop Venture Inks A Deal With... Bratislava?". Forbes. Retrieved March 12, 2016. 
  47. ^ Buhr, Sarah (January 18, 2017). "Hyperloop Transportation Technologies plans to connect all of Europe, starting with the Czech Republic". TechCrunch. US. Retrieved January 23, 2017. 
  48. ^ technology, BENGALURU (December 7, 2016). "India in talks to build Hyperloop; two Indian companies involved in the project". ET online. Retrieved December 7, 2016. 
  49. ^ "DGWHyperloop - Overview" (PDF). October 29, 2016. Archived from the original (PDF) on November 4, 2016. Retrieved January 14, 2017. 
  50. ^ Danigelis, Alyssa (September 20, 2013). "Hyperloop Simulation Shows It Could Work". Discovery News. Retrieved September 21, 2013. 
  51. ^ Statt, Nick (September 19, 2013). "Simulation verdict: Elon Musk's Hyperloop needs tweaking". CNET News. Retrieved September 21, 2013. 
  52. ^ "Hyperloop in OpenMDAO". OpenMDAO. October 9, 2013. Retrieved October 9, 2013. 
  53. ^ "Future Modeling Road Map". OpenMDAO. October 9, 2013. Retrieved January 4, 2014. 
  54. ^ "Hyperloop: Not So Fast". MathWorks. November 22, 2013. Retrieved December 5, 2013. 
  55. ^ 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. January 5–9, 2015. Kissimmee, Florida. doi:10.2514/6.2015-1587. 
  56. ^ Morris, David Z. (January 31, 2016). "MIT Wins Hyperloop Competition, And Elon Musk Drops In". Fortune. Retrieved February 1, 2016. 
  57. ^ Musk, Elon (January 30, 2016). Elon Musk speaks at the Hyperloop Pod Award Ceremony. YouTube.com. Retrieved June 3, 2016. 
  58. ^ Opgenoord, Max M. J.; Caplan, Philip C. (June 5, 2017). On the Aerodynamic Design of the Hyperloop Concept (PDF). 35th AIAA Applied Aerodynamics Conference. US: AIAA. doi:10.2514/6.2017-3740. 
  59. ^ Egli, Dane (July 31, 2017). "Hyperloop will improve transportation and national security". Baltimore Sun. Retrieved August 26, 2017. 
  60. ^ Williams, Matt (July 3, 2017). "Mars Compared to Earth". Universe Today. Retrieved September 27, 2017. 
  61. ^ Vanstone, Leon (July 13, 2015). "Elon Musk's high-speed Hyperloop train makes more sense for Mars than California". The Conversation. Retrieved February 2, 2016. 
  62. ^ Muoio, Danielle (February 6, 2016). "Elon Musk talks Hyperloop on Mars". Tech Insider. Retrieved March 4, 2016. 
  63. ^ Williams, Matt (February 12, 2016). "Musk Says Hyperloop Could Work On Mars... Maybe Even Better!". Universe Today. Retrieved February 26, 2016. 
  64. ^ Fitzpatrick, Alex (May 10, 2016). "The Race to Build the Hyperloop Just Got Real". Time Magazine. United States. Retrieved July 15, 2017. 
  65. ^ "Hyperloop Is Real: Meet The Startups Selling Supersonic Travel". forbes.com. Forbes. Retrieved July 18, 2017. 
  66. ^ "Ousted Hyperloop One co-founder Brogan BamBrogan is suing Shervin Pishevar, claims harrassment [sic]". Techcrunch. Techcrunch. Retrieved July 15, 2017. 
  67. ^ "Arrivo arrives as a new Hyperloop venture from a Hyperloop One co-founder". Techcrunch. Techcrunch. Retrieved July 15, 2017. 
  68. ^ "Hyperloop One Replaces Co-Founder Brogan BamBrogan with Senior Vice President of Engineering Josh Giegel". wsj.com. Wall Street Journal. Retrieved July 15, 2017. 
  69. ^ "Photos: Hyperloop One Shows Off 'DevLoop' Test Tube in Nevada". Inverse. March 7, 2017. 
  70. ^ Fallon, Dan (May 11, 2016). "Watch The First Real-World Test Of Hyperloop Technology". Digg. US. Retrieved May 12, 2016. 
  71. ^ Zolfagharifard, Ellie; Gray, Richard (May 12, 2016). "Elon Musk's Hyperloop is successfully demonstrated in Las Vegas". Daily Mail. Australia. Retrieved December 30, 2016. 
  72. ^ Hawkins, Andrew J. (July 5, 2016). "Hyperloop One says it can connect Helsinki to Stockholm in under 30 minutes". The Verge. US. Retrieved July 6, 2016. 
  73. ^ "Hyperloop One, DP World Sign Agreement To Pursue A Hyperloop Route In Dubai". 
  74. ^ Kharpal, Arjun (November 10, 2016). "Hyperloop One explores setting up high-speed transport system in Finland, Netherlands, Dubai". CNBC. Retrieved November 11, 2016. 
  75. ^ "Hyperloop's first real test is a whooshing success". Wired. July 12, 2017. 
  76. ^ Walker, Alissa (July 12, 2017). "Hyperloop One reveals full-size prototype of its shiny new pod design". Curbed. 
  77. ^ Branson, Richard (October 12, 2017). "Introducing Virgin Hyperloop One – the world's most revolutionary train service". Virgin. Retrieved October 12, 2017. 
  78. ^ Roberts, Daniel (May 20, 2015). "Elon Musk's craziest project is coming closer to reality". Fortune. Retrieved June 2, 2015. 
  79. ^ "Abu Dhabi explores Hyperloop link with Al Ain, potentially transforming cruise tourism in the city". Cruise Arabia & Africa. December 12, 2016. 
  80. ^ "About TransPod". TransPod. TransPod Inc. Retrieved October 4, 2017. 
  81. ^ a b "TransPod Raises $15 Million Seed Round to Commercialize Hyperloop Travel". TechVibes. November 23, 2016. Retrieved October 4, 2017. 
  82. ^ "TransPod Ultra-High-Speed Tube Transportation: Dynamics of Vehicles and Infrastructure". Science Direct. Retrieved October 4, 2017. 
  83. ^ "Keynote Lectures - Eurodyn". Eurodyn 2017. Retrieved October 4, 2017. 
  84. ^ a b c d Janzen, Ryan (2017). "TransPod Ultra-High-Speed Tube Transportation: Dynamics of Vehicles and Infrastructure" (PDF). Procedia Engineering. 199: 8–17. Retrieved October 4, 2017. 
  85. ^ Janzen, Ryan. "The future of transportation". YouTube. TEDx Toronto. Retrieved October 4, 2017. 
  86. ^ Galang, Jessica. "TransPod raises $20 million seed round to continue hyperloop development". BetaKit. Retrieved October 4, 2017. 
  87. ^ Janzen, R; Mann, S (2016). "The Physical-Fourier-Amplitude Domain, and Application to Sensing Sensors". Proc. IEEE International Symposium on Multimedia. 
  88. ^ "PARIS AIR FORUM - Intervention de Sebastien Gendron - TransPod Hyperloop". YouTube. TVLaTribune. Retrieved October 4, 2017. 
  89. ^ "This Canadian Hyperloop Concept Features a Faux Sunroof". WIRED. WIRED. Retrieved October 4, 2017. 
  90. ^ Wood, Eric. "Toronto startup's hyperloop technology makes a splash at Berlin trade show". itbusiness.ca. itbusiness.ca. 
  91. ^ "MERMEC joins Transpod Inc. in hyperloop system development". MERMEC. Retrieved October 4, 2017. 
  92. ^ "Sitael joins TransPod Inc. in hyperloop system development". SITAEL. Retrieved October 4, 2017. 
  93. ^ "TransPod Inc. - MaRS". MaRS. Retrieved October 4, 2017. 
  94. ^ "TransPod Accelerates Global Growth with Opening of Three Offices in North America and Europe". Mass Transit. Retrieved October 4, 2017. 
  95. ^ "TransPod Accelerates Growth Opening Three Global Offices". Blackshape Aircraft. March 15, 2017. Retrieved October 4, 2017. 
  96. ^ Brown, Mike (March 15, 2017). "TransPod Wants to Develop a Hyperloop for Canada by 2020". Inverse. Retrieved October 4, 2017. 
  97. ^ "TransPod partners with IKOS on design of hyperloop pod". Canadian Green Tech. 
  98. ^ Lewis, Rob. "TransPod Partners with Liebherr-Aerospace to Develop Technology for Hyperloop". Techvibes. Retrieved October 4, 2017. 
  99. ^ Sebastian Sjöberg (March 23, 2016). "Hyperloop Makers interview: Transpod, an infrastructure startup". 10X Labs. Retrieved May 4, 2016. 
  100. ^ Evan Pang (March 15, 2016). "Canadian Tech Company Designing A Pod That Travels 600 KM Per Hour". The Huffington Post Canada. Retrieved May 4, 2016. 
  101. ^ "Hyperloop: The tube that promises to get you from Montreal to Toronto in less than 30 minutes". Toronto Star. March 13, 2016. Retrieved August 2, 2016. 
  102. ^ "Toronto-Montreal Hyperloop plan could see travel time cut to 39 minutes View description Share". The Morning Show. September 18, 2017. Retrieved October 4, 2017. 
  103. ^ Thomas, Brodie. "Hyperloop startup TransPod scouting Alberta for test track options". Metro News. Metro News. Retrieved October 4, 2017. 
  104. ^ a b "INITIAL ORDER OF MAGNITUDE ANALYSIS FOR TRANSPOD HYPERLOOP SYSTEM INFRASTRUCTURE" (PDF). TransPod. TransPod. Retrieved October 4, 2017. 
  105. ^ Kowlton, Thomas (July 13, 2017). "Hype for Hyperloop in Canada: Half the Cost, Quadruple the Speed of Proposed High-Speed Rail Plan". Techvibes. Retrieved October 4, 2017. 
  106. ^ "DGWHyperloop - Overview" (PDF). Dinclix GroundWorks R&D. Retrieved October 10, 2017. [dead link]
  107. ^ "Delhi-Mumbai Hyperloop Corridor". DGWHyperloop. Retrieved October 10, 2017. 
  108. ^ "Proposed Hyperloop Project between Delhi and Mumbai". The Hans India. Retrieved October 10, 2017. 
  109. ^ "Support Us - DGWHyperloop". DGWHyperloop. Retrieved October 10, 2017. 
  110. ^ "Hyperloop Technology Global Market Outlook 2017-2023". Business Insider. Retrieved October 10, 2017. 
  111. ^ "Hyperloop Technology Market to Reach $1.3 Billion by 2022 - Key Players are Hyperloop Transportation Technologies, Hyperloop One, DGWHyperloop, TransPod & AECOM". Yahoo! Finance. Retrieved October 10, 2017. 
  112. ^ "Global Hyperloop Technology Market Analysis, Size, Segmentation and Forecast 2017-2023 by Key Players". Reuters. Retrieved October 10, 2017. 
  113. ^ "Crunchbase - Arrivo". crunchbase.com. Crunchbase. Retrieved July 15, 2017. 
  114. ^ "Brogan BamBrogan lost control of his first hyperloop start-up. Arrivo is his second chance". latimes.com. LA Times. Retrieved July 15, 2017. 
  115. ^ "About Arrivo". arrivo-loop.com. Arrivo. Retrieved July 15, 2017. 
  116. ^ Jenkins, Aric (November 14, 2017). "A Guy Named Brogan BamBrogan Wants to Bring a 200 mph Hyperloop to Denver. Here's His Plan". Fortune. Retrieved 16 November 2017. 
  117. ^ "About Hardt". Retrieved July 15, 2017. 
  118. ^ "Delft students win Elon Musk's hyperloop competition". 
  119. ^ Sterling, Toby (June 1, 2017). "Dutch group sets up hyperloop test center". Reuters. Retrieved October 11, 2017. 
  120. ^ Corder, Mike (June 1, 2017). "Dutch Testing Tube Unveiled for Hyperloop Transport System". Bloomberg. Retrieved October 11, 2017. 
  121. ^ "Rapport 'Hyperloop in The Netherlands'". Rijksoverheid. Retrieved October 11, 2017. 
  122. ^ Bonner, Walt (July 10, 2017). "BLAZING: 'Hyper Chariot' pods can travel 4,000 miles per hour". US: Fox News. Retrieved August 1, 2017. 
  123. ^ "Hyper Chariot". Retrieved October 6, 2017 – via Facebook. 
  124. ^ a b Hawkins, Andrew J. (January 30, 2016). "MIT wins SpaceX's Hyperloop competition, and Elon Musk made a cameo". The Verge. Retrieved January 31, 2016. 
  125. ^ Boyle, Alan (June 15, 2015). "Elon Musk's SpaceX Plans Hyperloop Pod Races at California HQ in 2016". NBC. Retrieved June 15, 2015. 
  126. ^ "Spacex Hyperloop Pod Competition" (PDF). SpaceX. June 2015. Retrieved June 16, 2015. 
  127. ^ "Hyperloop". SpaceX. Space Exploration Technologies. Retrieved June 15, 2015. 
  128. ^ Thompson, Cadie (June 23, 2015). "More than 700 people have signed up to help Elon Musk build a Hyperloop prototype". Business Insider. Retrieved June 28, 2015. 
  129. ^ "Hyperloop Competition Rules, v2.0" (PDF). SpaceX. October 20, 2015. Retrieved November 1, 2015. 
  130. ^ Boyle, Alan (December 15, 2015). "More than 120 teams picked for SpaceX founder Elon Musk's Hyperloop contest". Geekwire.com. Retrieved December 16, 2015. 
  131. ^ "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 September 12, 2015. Retrieved November 1, 2015. 
  132. ^ "Hyperloop: MIT students win contest to design Elon Musk's 700mph travel pods". The Guardian. Associated Press. January 30, 2016. Retrieved February 19, 2016. 
  133. ^ Kleinman, Jacob (February 1, 2016). "Hyperloop competition winners announced, see the top design". TechnoBuffalo. Retrieved February 19, 2016. 
  134. ^ "Awards". Texas A & M University College of Engineering. 2017. Retrieved September 10, 2017. 
  135. ^ "TU Delft students win Hyperloop Pod Competition". The Netherlands: Delft University of Technology. January 30, 2017. Retrieved June 3, 2017. 
  136. ^ Murphy, Meg (February 14, 2017). "Safe at any speed". MIT News. Cambridge, MA, USA. Retrieved August 29, 2017. 
  137. ^ Blodget, Henry (August 20, 2013). "Transport Blogger Ridicules The Hyperloop – Says It Will Cost A Fortune And Be A Terrifying 'Barf Ride'". Business Insider. 
  138. ^ Brandom, Russell (August 16, 2013). "Speed bumps and vomit are the Hyperloop's biggest challenges". The Verge. 
  139. ^ Salam, Reihan (August 9, 2011). "Alon Levy on Politicals vs. Technicals". National Review. Retrieved September 29, 2013. 
  140. ^ a b Plumer, Brad (August 13, 2013). "There is no redeeming feature of the Hyperloop". The Washington Post. 
  141. ^ a b c d e "The Future of Transport: No loopy idea". The Economist. Print edition. August 17, 2013. Retrieved August 16, 2013. 
  142. ^ Anderson, Chris C. (July 15, 2013). "If Elon Musk's Hyperloop Sounds Like Something Out Of Science Fiction, That's Because It Is". Business Insider. Retrieved August 14, 2013. 
  143. ^ Beach, Alfred Ely (March 5, 1870). "The Pneumatic Tunnel Under Broadway, N.Y". Scientific American. 22 (10): 154–156. doi:10.1038/scientificamerican03051870-154. 
  144. ^ "History". Swissmetro.ch. Retrieved August 14, 2013. 
  145. ^ Murph, Darren (August 4, 2010). "China's maglev trains to hit 1,000km/h in three years". Engadget. 
  146. ^ Frey, Thomas (October 30, 2013). "Competing for the World's Largest Infrastructure Project: Over 100 Million Jobs at Stake". Futurist Speaker. 
  147. ^ Svaldi, Aldo (August 9, 2013). "Longmont entrepreneur has tubular vision on future of transportation". The Denver Post. 

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