Radia

About Radia

Radia is a Boulder, Colorado aerospace and energy company developing WindRunner, which it describes as the world's largest aircraft. Founded in 2016 by MIT-trained aerospace engineer and Rhodes Scholar Mark Lundstrom, the company worked in stealth for about seven years before launching publicly in March 2024.

WindRunner is a fixed-wing cargo aircraft designed to fly wind turbine blades longer than 100 meters directly to wind farm sites, landing on short, semi-prepared airstrips. According to Radia, it will have about 12 times the cargo volume of a Boeing 747. Road and rail limits cap onshore blades at about 70 meters. Radia argues that air delivery would allow offshore-scale "GigaWind" turbines on land, lowering energy costs and expanding the land viable for wind farms. Radia also plans to develop wind projects with partners. It is also positioning the aircraft for other outsize cargo, including military airlift, and the project is referenced in the US National Defense Authorization Act.

Radia says it has raised more than $150M from investors including LS Power, ConocoPhillips, Good Growth Capital, Capital Factory and Caruso Ventures. This includes a $65M Series B in 2022 at a reported $1B valuation and a $35M Series C in March 2024. In March 2024 the company said it was raising up to $300M, a round trade press later described as a Series C; as of mid-2026 it was still raising capital to move WindRunner into certification and production. It unveiled the aircraft at the 2025 Paris Air Show. Leonardo, Aernnova and AFuzion are partners on design, engineering and certification. Its Italian unit, Radia Italia, plans manufacturing and final assembly in Grottaglie, Italy. First flight is targeted for 2029, with commercial service expected in the early 2030s.