The Lilium Jet and the Bankruptcy That Couldn't Kill It - How the eVTOL Industry's Most Unconventional Bet Collapsed and Why Someone Bought It Back

In October 2024, Lilium GmbH filed for insolvency after the German government declined a €50 million bridge loan, putting 900 employees out of work and shuttering the Munich-area facility in Weßling. Within weeks, an investment group acquired the assets and restarted the company under new ownership. The Lilium Jet’s unconventional design - and the nine years of engineering data behind it - proved too valuable to abandon.

What Made the Lilium Jet Different From Every Other eVTOL

Most electric vertical takeoff and landing aircraft use exposed rotors, either in a fixed multicopter arrangement or tilting from vertical to horizontal for cruise. Lilium rejected that approach entirely.

The Lilium Jet used 36 ducted fans - small, shrouded fan units embedded directly into the wings and canard surfaces, functioning like miniaturized jet engines. Those fans vector their thrust downward for takeoff and landing, then rotate to provide forward propulsion during cruise. Critically, the aircraft has real aerodynamic wings that generate lift as it accelerates - not just structural stubs.

At cruise speed, the Lilium Jet flew more like a fixed-wing aircraft than a helicopter. The wings carried the load; the fans provided thrust. That arrangement is fundamentally more efficient at speed than any design that sustains flight purely through powered lift throughout the entire mission.

The Performance Numbers That Set It Apart

Lilium’s target specifications for the Lilium Jet Seven were significantly beyond what competitors were promising. The claimed cruise speed was approximately 186 mph, with a range of up to 186 miles on a single charge.

Most eVTOL competitors were designing for 60 to 100 miles at lower cruise speeds - enough for urban shuttles between a downtown vertiport and an airport. Lilium was targeting a different market entirely: short-haul regional routes that commercial airlines don’t serve well but ground transportation handles too slowly. Munich to Frankfurt. Los Angeles to Bakersfield. New York to Providence.

That framing matters. An aircraft that can connect city centers across 150 to 200 miles at nearly 200 mph doesn’t compete with an airport shuttle - it competes with the short-haul turboprop.

Why Lilium Ran Out of Money

Three factors converged to push Lilium into insolvency, and each one has industry-wide implications.

The first was the energy density problem. Hovering on ducted fans is energetically expensive - fans must work at high power to hold an aircraft in stable vertical flight, and the efficiency gains at cruise don’t offset the energy cost at hover without sufficiently dense batteries. Jet-A fuel carries roughly 40 to 45 times the energy per kilogram of a state-of-the-art lithium-ion pack. Lilium’s business plan required battery technology to improve on a schedule that electrochemistry did not meet.

The second was certification timing. The European Union Aviation Safety Agency (EASA) and the Federal Aviation Administration (FAA) are both writing regulatory frameworks for powered-lift aircraft in real time. Every company in this space has discovered that certification takes longer and costs more than initial projections assumed. Each schedule slip consumed capital that Lilium couldn’t replace.

The third was the collapse of the funding environment. Lilium raised over €1 billion across multiple rounds and a 2021 SPAC listing, but their stock price fell sharply alongside the broader electric vehicle and electric aviation sector in 2022 and 2023. Equity markets effectively closed to them. They needed a bridge loan to reach the next certification milestone - €50 million from the German government - and the government declined. The insolvency filing followed.

Why the Assets Survived the Bankruptcy

The legal entity failed. The engineering work didn’t.

Nine years of aerodynamic testing, propulsion validation, systems integration data, software development, and certification groundwork represented real and irreplaceable value. An investment group moved quickly after the insolvency filing to acquire those assets and establish a new legal entity. The restructured Lilium started with a foundation no new startup could replicate.

This pattern has precedent. Cirrus Aircraft filed for Chapter 11 bankruptcy in the early 2000s and emerged under new ownership to build the Vision Jet, which became the most popular single-engine jet in general aviation history. The airframe concept and the accumulated engineering knowledge survived the financial collapse.

What the Restructured Lilium Still Has to Solve

New Lilium inherited the same technical challenges the original company couldn’t solve before running out of money.

The battery dependency remains. No restructuring changes the energy density of available lithium cells, and hitting the performance targets Lilium has staked its market position on requires either better batteries or a redefined mission profile. That dependency on the broader battery industry is not something the engineering team can engineer away.

The infrastructure gap is underappreciated. The Lilium Jet requires vertiports - dedicated facilities with high-power charging capable of fast aircraft turnarounds. These facilities don’t exist at scale anywhere. Building them requires real estate, permitting, grid connections, and community acceptance. That construction program has to run in parallel with certification, and it requires capital and coordination that isn’t the aircraft manufacturer’s to control.

The competitive landscape shifted while Lilium was restructuring. Joby Aviation advanced its FAA certification program and conducted crewed flight tests with representative payloads. Archer Aviation had its type certification basis established. Wisk Aero, backed by Boeing, made progress on its autonomous sixth-generation aircraft. The market window Lilium originally targeted was more occupied by the time they re-entered it.

Where the Broader eVTOL Industry Actually Stands

The past three years have been a reckoning. Overair, which was developing an electric tiltrotor called the Butterfly, shut down entirely in early 2023. Volocopter went through its own insolvency proceedings. Several companies that carried billion-dollar valuations discovered that the distance between a demonstration aircraft and a certificated commercial product is longer and more expensive than any initial business plan acknowledged.

The skeptical case: fundamental physical constraints on battery energy density don’t move on business schedules. Companies that built financial projections around aggressive improvement curves are finding the curves move slower than required. Novel aircraft certification in a new regulatory framework takes time because taking time is the appropriate approach when passengers are aboard.

The optimistic case: these aircraft fly. Multiple companies are conducting crewed tests. Battery technology is improving, slower than the most aggressive forecasts but measurably. The infrastructure challenge is a deployment problem, not a physics problem. And the underlying physics of short-range electric aviation work with today’s energy density when the aircraft and mission are appropriately sized.

Both positions are partially correct. The honest assessment varies significantly by company, by design approach, and by target market.

What Pilots Should Be Watching

The FAA’s powered-lift certification framework is still being refined, and the outcome will directly affect pilot careers in this sector. Whether a powered-lift rating sits on an existing commercial certificate, whether each aircraft requires a separate type rating, and how instrument and weather minima will be structured for these operations are all open questions. Pilots interested in this sector should be tracking the agency’s notices of proposed rulemaking and the powered-lift advisory circular materials as they develop.

The airline investment angle is also meaningful. Delta Air Lines holds a partnership with Joby. United Airlines has invested in Archer. Major carriers see electric air taxis as potential feeder networks extending their hubs into underserved communities. If that commercial model proves out, careers flying these aircraft may structurally resemble regional airline careers more than general aviation careers.

Lilium’s particular bet - that range and speed are the right variables to optimize - has not yet been validated by a certificated aircraft in revenue service. But if battery technology closes the gap, an aircraft capable of the 200-mile mission at nearly 200 mph addresses a market that is measurably larger and less contested than the urban shuttle.

Key Takeaways

Lilium filed for insolvency in October 2024 after the German government declined a €50 million bridge loan; the assets were rapidly acquired and the company restarted under new ownership.
The Lilium Jet’s 36 ducted fans embedded in aerodynamic surfaces gave it fundamentally different performance characteristics than rotor-based eVTOL competitors - targeting 186 mph cruise and 186-mile range versus the industry norm of 60-100 miles.
Lilium’s collapse resulted from three converging factors: insufficient battery energy density, certification delays consuming capital, and a closed equity market after the 2022-2023 sector downturn.
The restructured company inherited nine years of engineering data and certification groundwork - a significant head start - but the underlying battery and infrastructure challenges remain unsolved.
The FAA’s powered-lift regulatory framework is still being written; pilots interested in this sector should monitor rulemaking activity, as it will define rating structures and career pathways in electric aviation.