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January 25, 2016

In It To Win It

CMU Team Floats Airtight Design In Hyperloop Pod Competition

By Kelly Saavedra /


When Elon Musk first made public his idea for the Hyperloop — an ultra-high speed ground transportation system that would rocket passengers hundreds of miles through a tube — some thought he’d gone off the rails.

But Anshuman Kumar, who was in India preparing to embark on a Carnegie Mellon education, leaped at the opportunity to do something groundbreaking during his time as a student.  

Musk, the CEO of SpaceX and Tesla Motors, called on universities around the world to compete to design and build the best Hyperloop pod. One month before Kumar even arrived in Pittsburgh, he’d already recruited half a dozen team members eager to accept the challenge.

“The real motivation is the impact this will have on people, cities and society,” Kumar said of the Hyperloop, which has the potential to turn a six-hour road trip into a 30-minute commute. “Right now it’s a ‘vacation’ when a mother and father in Pittsburgh want to visit their daughter at college in New York. With the Hyperloop, it becomes as simple as ‘dinner in the city tonight.’ This is really about relationships and bringing people closer together.”

Musk envisions the system to be a cross between the Concorde jet, a railgun and an air hockey table. Extremely low air pressure inside a network of tubes spanning hundreds of miles would allow pods filled with people to zoom through them at transonic speeds.

The pod designed by CMU’s Hyperloop team, which has grown to about 75 engineering, design and business students at Carnegie Mellon, made it to the semifinal round of the Official SpaceX Hyperloop Pod Competition based on a document they submitted detailing aspects of their pod’s levitation, propulsion, structures, navigation, communication and safety. SpaceX deemed it as a “solid and impressive” design briefing.

In late January the team advanced in the SpaceX Hyperloop Pod Competition at Texas A&M, where CMU was selected among the top 22 teams out of the 120 teams attending. The remaining teams, whittled down from 1,000 initial competitors, will test their pods this summer at the Hyperloop test track in Hawthorne, Calif.

“In our efforts to design a truly scalable Hyperloop pod, we find ourselves dealing with questions that even industry experts have trouble answering,” said Karthik Chandrashekaraiah, the structure lead engineer. “The most pressing issue is that of the air bearings we intend to use. Even the most promising alternative for our levitation system — an air caster style bearing — has never been tested at the extreme conditions that have been proposed for the final event.”

A crowdfunding campaign helped the team raise the money they needed for prototyping and testing.

“We need to simulate the conditions for levitation of the assembly. We need to put together a test rig that will allow us to generate quantitative proof to substantiate our designs before we can move to the final round and actually build our pod,” said Shishir Gupta, the team’s air bearing expert.

Once the team determines the pod can float, they’ll need to slow it down. That will require the use of magnets, since the pod is not actually touching anything in the tube.

So far, the team has been primarily sponsored by CMU’s Mechanical Engineering Department, which has provided space for them to work. Integrated Product Design Professor Julian Lion Boxenbaum has been guiding the team with design strategy and administration from the start. Assistant Teaching Professor of Mechanical Engineering Satbir Singh is the team’s official SpaceX adviser, helping out with technical issues.

The competition is being held at half scale, primarily to reduce the cost and complexity of the designs. However, a full-scale pod would hold around 20-30 people.

Kumar will graduate from Carnegie Mellon in 2016 with a master’s degree in Integrated Innovation for Products and Services.

Follow the team on Facebook.