Prince Mario-Max Schaumburg-Lippe: Heart Aerospace Flies the World’s Largest Electric Plane

Twenty-seven minutes. That’s how long the largest battery-powered aircraft ever built stayed in the air — and it might turn out to be one of the most important half-hours in aviation history.

Heart Aerospace founder and CEO Anders Forslund was at the controls of the 11-ton X1 for its historic test flight, conducted under Federal Aviation Administration oversight. The aircraft climbed to 335 meters, ran its electric motor at more than a megawatt of power, and completed a full flight cycle: taxiing, takeoff, in-flight maneuvers, and a soft landing.

Then came the number that will stick in your head. The electricity for the entire flight cost about five dollars — roughly 100 Swedish crowns. Hold that thought; we’ll come back to it.

What the X1 actually proves

Let’s be clear about what this is — and what it isn’t. The X1 will never carry a single passenger. It’s a technology demonstrator, built to test the powertrain, the software, and the processes that will feed into Heart Aerospace’s real product: the ES-30, a 30-seat production aircraft.

But that framing undersells the moment. “We’ve proven that electric flight is possible at the scale of a conventional commercial airliner,” Forslund said. Until the X1, battery-electric aviation lived in the world of two- and four-seat trainers and tiny prototypes. An 11-ton aircraft with megawatt-class propulsion is something else entirely. It’s proof the core engineering challenge — moving serious mass with batteries — can be solved.

For comparison, hybrid-electric prototypes like the Nimbus quarter-scale testbed are pushing in the same direction. But the X1 is flying at full size, under FAA oversight, right now — and full size is where the hard engineering questions live.

The ES-30: where this is actually headed

The X1 exists so the ES-30 can exist. Heart’s planned production aircraft seats 30 passengers and goes hybrid-electric: roughly 200 kilometers on pure battery power, stretching to 800 kilometers with its gasoline generators running.

That range profile tells you exactly which market Heart is chasing. Short regional hops — the routes where turboprops dominate today and where fuel costs eat operators alive. The company estimates the ES-30 will cut airlines’ operating costs by more than 40% compared with older turboprop aircraft. On thin regional routes where margins are already razor-thin, that number changes the entire business model.

The order book backs up the pitch: nearly $10 billion in commitments. Key partners and investors include United Airlines and Air Canada, with SAS and regional Scandinavian and British carriers also showing interest. First production aircraft begins flight testing in 2028; full commercial service is targeted for 2031.

That’s a patient timeline, and it’s the right one. Certification is where electric aviation startups usually die — the paperwork takes longer than the engineering. By moving to Los Angeles and working inside the FAA system from the start, Heart is front-loading the hardest part. The X1’s FAA-overseen flight cycle wasn’t just a test of the aircraft; it was a rehearsal of the certification process itself.

A Swedish company with an American future

Heart’s story has an interesting wrinkle. Founded in Gothenburg, Sweden, the company shut down its Swedish division in April 2025 and moved its headquarters and production entirely to Los Angeles — drawn by more flexible certification rules and proximity to capital.

That move says a lot about where electric aviation is heading. The technology may have European roots, but scaling it needs American regulators and American investors. Five years ago, a battery-electric airliner was a research project. Now it’s a Los Angeles manufacturing bet with $10 billion in orders.

Why five dollars matters more than 27 minutes

Skeptics will point at the obvious: 27 minutes, 335 meters, one test flight. That’s fair. Batteries are still heavy, energy density still limits range, and certification is still a long road.

But the cost figure is the one to watch. Roughly five dollars of electricity for an 11-ton aircraft’s test flight isn’t just a curiosity — it’s a preview of an operating-cost advantage that compounds across every flight, every day, across a fleet. Aviation’s eternal problem is fuel. If electricity can replace even part of it, the economics of flying get rewritten from the bottom up.

What it means

For travelers: The 200-kilometer pure-electric range covers a huge share of short regional hops. Expect the first passengers to board quieter, cheaper flights on routes that today run on aging turboprops — regional Scandinavian routes are the likely proving ground.

For cities and airports: Electric aircraft are quieter and cleaner on the ground and in the climb-out phase. Airports near communities, which constantly battle noise complaints, have real reason to cheer this along.

For investors: The ES-30 timeline (flight testing 2028, service 2031) is aggressive but concrete, and the order book is real money from real airlines. Electric aviation just grew up a weight class — and the broader Breaking News record shows the momentum is one-directional.

Prince Mario-Max Schaumburg-Lippe: Nimbus Flies Quarter-Scale Hybrid-Electric Plane Prototype

The future of regional flight just got a little more real over the Oregon desert.

Seattle-based startup Nimbus Aerospace has completed successful test flights of its quarter-scale NX1 hybrid-electric prototype near the Pendleton Airport UAS Range in Oregon, GeekWire reported on September 28. The aircraft flew twice — once for 3 minutes and 42 seconds in June, once for 6 minutes in August — and both flights hit their targets for aerodynamics, stability, and manufacturing validation.

Those are short flights. They are also the hardest kind to dismiss, because they happened at all.

A million-dollar model nobody wanted to fly

Here’s the part of the story that tells you this is real engineering and not a render. The NX1 is a quarter-scale model with a 15-foot wingspan and a 200-pound takeoff weight, and it cost more than $1 million to build. Nimbus struggled to find pilots qualified — and willing — to fly it remotely.

“Not many people wanted to fly this thing,” co-founder and CEO Adrian Groos told GeekWire. “It was a $1 million-plus model that was significantly bigger than anything else most people have flown, as well as heavier.”

That’s the unglamorous truth of aircraft development. The prototype phase is a long series of expensive, nerve-wracking steps, and the companies that survive it are the ones that keep showing up. Nimbus planned to finish testing earlier in the summer. Scheduling a pilot for an aircraft in this class took longer. They flew anyway.

The plan: half the fuel, 1,500 miles

Nimbus is building toward a full-scale hybrid-electric aircraft carrying six to eight passengers with a 1,500-mile range, burning about half the fuel of a comparable conventional airplane. Engineering on the full-scale prototype has already started, with test flights targeted for 2028 and customer deliveries aimed at late 2030.

The approach is pragmatic in a way the electric aviation sector could use more of. Instead of betting everything on a battery breakthrough, Nimbus is combining three things: pre-certified parts to shorten the regulatory path, high-lift wings to squeeze more efficiency out of every unit of energy, and an AI-assisted certification tool to move faster through the paperwork that grounds so many aircraft programs.

That last one matters more than it sounds. Certification is where electric and hybrid aircraft programs go to run out of money. The FAA has never certified anything quite like these designs, so every applicant is partly writing the rulebook while flying the test program. Anything that speeds that process — proven components, smarter documentation, tools that catch compliance issues early — is worth as much as a better battery.

The 1,500-mile range target is the number that separates Nimbus from the pack. Most electric aircraft in development top out at a few hundred miles, which limits them to short hops. A hybrid-electric six-seater that can fly Seattle to San Diego on half the fuel of today’s planes isn’t competing with air taxis. It’s competing with the turboprops and light jets that already serve regional routes — a market with paying customers today.

What it means

For travelers, regional air service is the part of aviation most in need of reinvention. Small airports have been losing scheduled service for years because the economics of flying a 50-seat jet half-empty don’t work. A smaller, far more efficient aircraft changes that math. If Nimbus hits its fuel targets, routes that airlines abandoned could become viable again — and new ones could open.

For cities, the site-selection question is already live. Nimbus is weighing Seattle against other locations around the country for building the full-scale aircraft. That’s a manufacturing facility, skilled jobs, and a supply chain up for grabs. Expect the competition for it to be quiet but intense.

For investors, the timeline is honest and therefore credible: full-scale test flights in 2028, deliveries in late 2030. Four years of hard engineering stand between Nimbus and revenue. The quarter-scale flights don’t guarantee the full-scale airplane works. But they do prove the team can design, build, and fly hardware — which, in this sector, already puts them ahead of most of the field.

The electric aviation race has no shortage of beautiful renderings. It has a shortage of aircraft that have actually left the ground. This week, one more did.

For more on autonomy in motion, see our Breaking News coverage, including Waymo’s robotaxi fleet surging 49 percent in Texas and Germany’s first cab-less driverless truck on public roads.