Magnetic levitation (maglev) technology unlocks the potential for frictionless, highly efficient innovations that sound like they’re straight out of science fiction. Below are some of the most imaginative applications engineers and designers have envisioned for this game-changing technology.
1. Floating Cities
Our planet is increasingly crowded, polluted, and chaotic—but a bold design concept suggests we could literally rise above these challenges by relocating to magnetically levitated sky islands, complete with lush forests, mountainous landscapes, and bustling urban hubs.
Dubbed “Heaven and Earth,” this concept was created by Chinese architect Wei Zhao and earned an honorable mention in eVolo’s 2012 Skyscraper Competition. Zhao proposed that the massive donut-shaped platform would feature magnets on its underside, which would repel Earth’s magnetic field to keep the island airborne. The floating structure would rotate to generate energy, theoretically powering a fully sustainable society.
Unfortunately, like most utopian visions, this idea is likely to remain nothing more than a distant dream.
2. Super-High-Speed Rail
Traditional high-speed trains can reach speeds of up to 180 miles per hour, but they generate massive friction and heat as they race along the tracks—leading to mechanical wear and significant energy loss. In contrast, maglev trains hover a few inches above the rail and exceed 300 miles per hour. By eliminating friction, they use less energy and could drastically cut costs.
James Powell, director of Maglev 2000 and co-inventor of superconducting maglev trains, notes that while conventional high-speed rail passengers pay roughly $1 per mile traveled, maglev fares could drop to as little as 5 cents per mile.
A handful of maglev trains already operate in Asia and Europe, with several new projects in development. Japan’s MLX01 set a maglev speed record of 361 mph in 2003, but China is reportedly developing a train that could double that speed. What’s more, maglev trains operating in airless tubes could potentially reach speeds of several thousand miles per hour—making commutes effortless, assuming acceleration and deceleration forces don’t crush passengers first.
3. Space Launch System
For years, NASA has explored using maglev transportation’s high speeds to launch spacecraft into low Earth orbit. “It would truly open up space to human exploration and commercialization,” Powell says. “Right now, we can’t do that because it’s too expensive.”
Powell and his colleagues have proposed two generations of maglev space launch technology. The first is a cargo-only launch track built into a mountainside, reaching an altitude of 20,000 feet. Magnets would propel a spacecraft along the track to speeds of around 18,000 miles per hour—fast enough to reach space. Of course, constructing such a track would cost a staggering $20 billion. While that’s a massive upfront investment, Powell argues it could save money in the long run: currently, launching one kilogram of payload into low Earth orbit costs $10,000, but his StarTram system could do it for less than $50 per kilogram.
The second generation? A passenger-carrying launch track costing $60 billion, stretching 1,000 miles long and 12 miles high. It would use magnetic levitation both to support the track and propel the train to speeds of 5.6 miles per second. While companies like Virgin Galactic charge $200,000 per person for a space flight, StarTram could potentially lower that cost to just $50,000.
4. Flying Cars
It’s not exactly the flying car of The Jetsons fame, but SkyTran pods aim to bring maglev transportation to the skies. Each private pod, suspended from an elevated guideway, can carry three passengers and uses maglev technology to reach speeds of up to 150 mph.
Theoretically, SkyTran could transport passengers directly to their destinations along the guideway route without unnecessary stops for other riders. The system could be built using existing technology and claims to eliminate traffic congestion while reducing carbon dioxide emissions and dependence on foreign oil.
NASA has shown interest in the technology: in 2009, it partnered with Unimodal (SkyTran’s creator) to evaluate advanced transportation software for the system.
5. 3D Cell Cultures
Cells grown in flat petri dishes are often poor models for the three-dimensional human body. That’s why a team of medical researchers from the University of Texas and Rice University turned to magnetic levitation to allow cell cultures to develop in 3D space.
The experiment was surprisingly simple: researchers injected cancer cells with magnetic iron oxide and gold nanoparticles, added the cells to a standard petri dish, then placed a coin-sized magnet on top of the dish and let the cells grow.
The magnet lifted the cells off the bottom of the dish, and the cells developed while suspended in the liquid. Compared to cells grown in traditional petri dishes, the maglev-grown cancer cells had a structure and protein production more similar to tumors in living animals. These tumor models could help researchers develop more effective cancer treatments. The team also notes that magnetic levitation-enabled 3D development might one day be used to grow more realistic lab-grown organs.
6. Efficient Wind Power
Standard wind turbines convert only 1% of wind energy into usable power, with much of this inefficiency stemming from energy loss due to friction as the turbine spins. Researchers at the Guangzhou Energy Research Institute estimate that maglev wind turbines could boost energy generation by up to 20% compared to traditional models.
The researchers proposed a massive vertical-blade turbine, with the blades suspended above the base using neodymium magnets. Since the moving parts wouldn’t touch, the turbines would be virtually frictionless and could capture energy from winds as slow as 1.5 meters (5 feet) per second. Maglev turbines could lower the cost of wind energy to less than 5 cents per kilowatt-hour—on par with coal-generated electricity and roughly half the typical cost of conventional wind power.
A 1-gigawatt maglev turbine would cost $53 million to build and require 100 acres of land, yet it could power 750,000 homes. By comparison, a traditional wind farm of the same capacity would cost hundreds of millions of dollars and need 64,000 acres to house 1,000 turbines.
7. Studying Weightlessness
Weightlessness poses serious health risks for astronauts: for every month in zero gravity, an astronaut loses 1–2% of their bone density (compared to 1–2% per year for people on Earth). Muscles weaken, fluids shift throughout the body, and the immune system becomes compromised. Using magnetic levitation to simulate weightlessness on Earth allows scientists to better understand these changes and their impacts.
For years, NASA scientists have used superconducting magnets to levitate insects, frogs, and mice. Cells are mostly water, which is weakly diamagnetic—meaning its electrons rearrange to oppose a strong magnetic field. When living organisms are exposed to superconducting magnets, this molecular effect causes them to levitate.
Recently, floating fruit flies helped scientists discover that weightlessness alters the expression of over 200 fly genes—primarily those responsible for metabolism, immune function, and cell signaling. Humans may undergo similar genetic changes in zero gravity. Understanding how the body responds to weightlessness could eventually make long-duration spaceflights (such as a mission to Mars) safer for humans.
8. Magnetic Bearings
Magnetic levitation isn’t just for futuristic technologies—it’s already being used in practical, down-to-earth applications. Industrial equipment like pumps, generators, motors, and compressors use maglev to support moving parts without physical contact. The same magnetic bearings used in maglev trains are employed in electric power generation, petroleum refining, machine-tool operation, and natural gas pipelines.
These bearings also eliminate the need for lubrication—a critical advantage in machines where lubricants could cause contamination or in evacuated tubes where lubrication would fail. Magnetic bearings tend to be complex and custom-built for each machine, driving up costs by as much as $45,000 per bearing. But if prices come down, these low-friction components could play an increasingly vital role in industrial settings.
