Supersonic Electric Airplane Next from Elon Musk?
Musk says he has a design in mind for a supersonic electric jet that takes off and lands vertically. Continue reading →
When Elon Musk isn't mulling over self-driving cars or rocket launches, he has another thing on his mind: electric airplanes.
In a recent interview with Marketplace, the Tesla Motors and SpaceX founder said he believed the future of transportation - including everything from cars to airplanes and ships - will be fully electric-based.
Musk is particularly keen on the idea of electric airplanes. In the Marketplace interview, he said he has a design in mind for a "pretty cool supersonic, vertical take-off and landing electric jet" that would be "really fun."
He also likes the idea of an airline company based solely on electric power. See the video here.
This isn't the first time Musk has expressed interest in electric planes. During MIT's Aeronautics and Astronautics Centennial Symposium last fall, Musk briefly mentioned building an electric supersonic aircraft but said that as much as he would like to do it, he thinks "his mind might explode." See video below.
If Musk's vision eventually does turn into a reality, it could help improve the air transportation industry, which, according to the Natural Resources Defense Council (NRDC), emits far more pollution than any other method of transportation. By their measure, every ton of cargo moved by plane adds over 4.5 times more particulate matter and nearly 25 times more nitrous oxides to the environment than if it were transported by ship.
Musk has obviously been thinking electric for quite some time now, having devoted his time, energy and investments to Tesla Motors' electric vehicles, such as the new sedan Model S and the first fully efficient SUV, the Model X.
At Tesla, he's also working on the PowerWall, a home battery that uses electricity generated from solar panels for charging, powers homes in the evening and provides a backup electricity supply. Then there's Tesla's $5 billion lithium-ion-battery-producing Gigafactory in Nevada that's currently under construction.
Although Musk has a lot of interest in electric-powered transportation and homes, the rockets he's developing for SpaceX are not driven by electricity. Even though rocket launches are rare, they're harmful to the environment when they do blast off, with the reactive gases emitted causing ozone molecules to break apart.
Elon Musk speaks at SolarCity’s Inside Energy Summit in Manhattan.
Technology moves faster every day. But commercial air travel hasn't changed as quickly as some industries in recent years. Experts project big changes in the next few decades, though, especially as aviation companies deploy significant innovations in design, material sciences and alternative energy sources. Here we take a look at some of changes on the horizon for commercial, cargo and experimental aircraft.
The N3-X concept aircraft, from Boeing and NASA, is based on a blended wing body (BWB) design intended to improve aerodynamics, fuel efficiency and noise emissions. The ultra-wide fuselage would greatly expand carrying capacity for commercial flights.
Developed by a research team from the Massachusetts Institute of Technology (MIT), the D8 "Double Bubble" aircraft would be used for domestic flights and is designed to fly at Mach 0.74 carrying 180 passengers in a coach cabin roomier than that of a Boeing 737-800. The D8 could enter service as soon as 2030, NASA says.
From Lockheed Martin, this concept design for a future supersonic aircraft is focused on reducing emissions and creating a quieter boom. A quieter craft would allow supersonic flights over land, where they are currently prohibited.
Meanwhile, over on the cargo plane tarmac, the GIGAbay concept envisions a ginormous aircraft powered by four hybrid fuel/electric engines, with supplemental energy provided by hydrogen fuel cells, wind generators and solar panels. The cargo area of the GIGAbay design is so large it could carry other jumbo aircraft, or even mobile field hospitals.
Powered by two superconducting electric motors, the concept plane known as the VoltAir (get it?) is a proposed all-electric airliner out of Europe. The engines would draw from next-generation lithium ion batteries -- really big ones -- that would be simply swapped out between flights.
Some cutting-edge technologies on the horizon are actually modifications of existing designs that have been around for more than a century. To wit, the illustration above imagines the closed-wing "PrandtlPlane" design applied to commercial passenger aircraft. Closed-wing planes have smaller wingspans than traditional aircraft, relative to fuselage size, allowing larger planes to operate out of smaller airports.
Another sort of hybrid, the E-Thrust design -- from Rolls-Royce and several European partners -- uses a combination of gas-turbine engines and battery-powered fans. The jet engines would only kick in when needed, similar to gas/electric hybrid cars. The fans would also be used, on descent, as built-in windmills to recharge the onboard batteries.
And from the ultralight division, we have the Solar Impulse 2, the latest iteration of the world's most advanced solar-powered, single-seat aircraft. The Swiss team behind the project plans to circumnavigate the planet in 2015, using a team of pilots flying in shifts over the course of about five months.
Finally, from the designer who brought us the GIGAbay cargo plane, the mighty Sky Whale also subscribes to the concept that bigger equals better -- and greener. The Sky Whale is a largely theoretical vision for a passenger plane that could seat 755 passengers on three floors, using a combination of alternative power sources. The upshot? More passengers per flight means fewer flights, and fewer emissions.