Sign In or Create an Account.

By continuing, you agree to the Terms of Service and acknowledge our Privacy Policy

Podcast

Why a Climate Startup Is Building the World’s Biggest Airplane

Inside episode nine of Shift Key.

A Radia Windrunner.
Heatmap Illustration/Radia

Radia is a $1 billion climate tech startup with an unusual pitch: It is trying to build the world’s largest airplane. Its proposed aircraft, the Radia Wind Runner, would be as long as a football field, nearly as wide as a New York city block, and capable of carrying 12 times the volume of a Boeing 747. Such a plane could ferry massive wind-turbine blades, unlocking what the company calls “gigawind” — the ability to build offshore-sized wind turbines on land.

Why is that important? Because the larger the wind turbine, the more electricity that it generates — and the less wind it needs to work with. Radia says that its “gigawind” farms could profitably go into places with slower wind speeds, such as the Northeast or Mississippi Delta. They could also be built in the existing Wind Belt, potentially doubling current output.

In this week’s episode, Rob and Jesse talk to Radia’s chief executive officer, Mark Lundstrom. (Jesse’s consulting firm did some research for Radia while it was in stealth mode, in 2020 and 2023.) We discuss why the world needs a bigger plane, how such a new aircraft gets licensed, and why massive wind turbines could be such a big deal for renewable electricity. Shift Key is hosted by Robinson Meyer, executive editor of Heatmap, and Jesse Jenkins, a Princeton professor of energy systems engineering.

Subscribe to “Shift Key” and find this episode on Apple Podcasts, Spotify, Amazon, or wherever you get your podcasts.

You can also add the show’s RSS feed to your podcast app to follow us directly.

Here is an excerpt from our conversation:

Jesse Jenkins: I’m here in the mechanical and aerospace engineering department at Princeton, so we’ve got a lot of students excited about new aerospace applications. I have a six-year-old kid, as well, and he’s also excited about anything that goes fast and is big, so I’m sure he’ll get excited about the eventual Lego kit for the WindRunner that we’ll have to get out in the world. But talk through the size of this aircraft compared to, say, something we’re used to, like a 737 or more conventional aircraft.

Mark Lundstrom: Sure. So before understanding the size, one has to understand the fundamental mission requirements. And so the goal, Radia’s goal is to be able to move up to a 105 meter long object that could weigh up to 75 tons. Now we can also move multiple smaller blades, so two 95s, or three 85s, or four 75s. So the vehicle is quite versatile.

In terms of sheer size, it’s about 12 times the volume of a 747. So it’s very, very large compared to the 747. It’s about nine times the volume of the Antonovs. And yet what's very different about it —

Jenkins: And the Antonov, that’s the largest plane built to date, right?

Lundstrom: Yes, the largest volumetric plane right now. There’s about 14 or 15 of them left in the world, usually Russian or Ukrainian operated.

Robinson Meyer: I was going to say, I remember the biggest plane in the world being destroyed right at the beginning of the Ukraine War and was wondering how that compared to the to the WindRunner vehicle.

Lundstrom: So the Antonov 225, there was one of them. WindRunner is six times bigger in volume than that airplane was, and it’s nine times bigger in volume than the remaining Antonov 124s that are still out there. And so, and what’s additionally unusual about it, in addition to the size, is its ability to land on dirt.

Meyer: Wow.

Lundstrom: Things like Antonovs, 747s, etc., they need to land on about 9,000 feet of steel reinforced concrete, typically. And we designed the WindRunners so we could land on relatively short dirt strips, so just over a mile of a semi-prepared field. And that allows us to bring the payload into a wind farm, and be able to get a very large aircraft out of the wind farm. It’s probably the first time that an aircraft has been designed to optimize around volume, as opposed to mass.

Usually when an aircraft design team starts off, they’ll start off thinking about how much mass has to be moved. We really started off thinking about how much volume has to be moved. So there are aircraft that move larger mass than the WindRunner. There’s absolutely no aircraft that comes close to moving larger volumes and being able to land that volume on a relatively short dirt strip.

This episode of Shift Key is sponsored by…

Advanced Energy United educates, engages, and advocates for policies that allow our member companies to compete to power our economy with 100% clean energy, working with decision makers and energy market regulators to achieve this goal. Together, we are united in our mission to accelerate the transition to 100% clean energy in America. Learn more at advancedenergyunited.org/heatmap

KORE Power provides the commercial, industrial, and utility markets with functional solutions that advance the clean energy transition worldwide. KORE Power's technology and manufacturing capabilities provide direct access to next generation battery cells, energy storage systems that scale to grid+, EV power & infrastructure, and intuitive asset management to unlock energy strategies across a myriad of applications. Explore more at korepower.com.

Music for Shift Key is by Adam Kromelow.

Yellow
🔒

You’ve reached your free article limit

Subscribe to Heatmap News for unlimited access to daily energy and climate coverage.
To continue reading
Create a free account or sign in to unlock more free articles.
or
Please enter an email address
By continuing, you agree to the Terms of Service and acknowledge our Privacy Policy
AM Briefing

PoorWeave

On X-energy’s next plant, Italian power, and Chinese solar exports

A data center interior.
Heatmap Illustration/Getty Images

Current conditions: A new nor’easter is washing the ocean over North Carolina’s Highway 12 right as crews complete reconstruction on the Outer Banks thoroughfare following last month’s storm • After whipping Mexico’s Pacific Coast with heavy rains, Hurricane Trudy has weakened to a Category 1 storm • Super Typhoon Champi knocked out power for more than half of Guam before barreling toward the Philippines as a potential Category 5 storm.


THE TOP FIVE

1. Wall Street’s AI rout ends for chipmakers, but not for indebted cloud computing giants

Last week was the worst week for the tech-heavy Nasdaq 100 Index since President Donald Trump’s tariffs roiled the market in April 2025. The reason? Hotter than expected federal data on inflation fueled fears of an interest rate hike that could prove devastating to the buildout of artificial intelligence infrastructure. Investors were already worrying the physical investments would cost more than giants such as ChatGPT-maker OpenAI or Claude-creator Anthropic are set to earn. But on Monday, semiconductor makers such as Oracle, Intel, and Micron Technology rallied as the AI rout came to an end. Yet CoreWeave, the cloud-computing heavyweight that led the selloff last week, closed slightly lower. The issue, investors told CNBC, is the company’s debt load. “The market tends to get worried about companies that have refinance risk when rates are higher, and CoreWeave was a little bit of the poster child,” John Lloyd, global head of multi-sector and corporate credit at Janus Henderson, whose firm owns CoreWeave bonds due in 2031, told the broadcaster. “They need the debt markets in order to grow, in some form or fashion.” That CoreWeave came close to bouncing back at all comes down at least in part to Ark Investment Management chief Cathie Wood opting to buy about $12 million of shares in the company amid the market plunge last week, a play for which The Street notes she’s known. Notably, Oracle, which was previously dubbed the “canary in the coal mine” for concern over AI debt, closed just 1% higher before plunging in after-market trading.

Keep reading...Show less
Yellow
Climate Tech

Exclusive: Veckta Raises $11 Million to Help Businesses Buy Onsite Solar and Storage

The company simplifies the process of getting consistent, apples-to-apples bids.

Solar panels.
Heatmap Illustration/Getty Images

With commercial electricity prices steadily climbing, many businesses and real estate owners are increasingly eager to generate and store their own power onsite, cutting their bills and making costs more predictable. But figuring out whether solar and storage can actually pencil out — and under what conditions — can be a nightmare. Ask a handful of developers for a quote and you might get a rooftop solar array from one, a ground-mounted solar and battery system from another, and a gas turbine from a third, each with its own size, price, and financing terms.

That leaves buyers comparing apples to oranges. And for businesses evaluating a portfolio of potential projects, the process gets even messier. “These are very local-centric systems. Different interconnection requirements, different permits, different suppliers,” Gareth Evans, CEO of the onsite energy planning and procurement startup Veckta, told me. “There are hundreds of solar developers in every state.” The hard part, he added, is “knowing what supplier to go with, how to ask them the right questions in the right language, in the right format, so that you’re getting consistent bids back that you can compare and contrast.”

Keep reading...Show less
Yellow
Daily Briefing

China’s Thriving New Energy Exports

The Iran war has been a gift to the country’s vehicle, solar, and battery business.

Xi Jinping.
Heatmap Illustration/Getty Images

This is Heatmap Daily, a weekday evening digest written by our executive editor.

Happy Monday and welcome back. For months now, we’ve been talking about how the U.S. and Israel’s war in Iran has been a boon for electric vehicles, clean energy, and (unfortunately) coal.

Keep reading...Show less