The manufacturer’s EL-2 Goldfinch, which first flew in May, got its first off-runway action when it lifted off from a grassy area smaller than 300 feet near a company facility in Manassas, Virginia.

The company has multimillion dollar contracts across the military, with the Air Force, Army, and Navy all exploring the use of eSTOL technology. The relatively cheap, runway-independent aircraft are viewed as an attractive alternative to conventional fixed wing aircraft and rotorcraft

Electra said the demonstrator completed several takeoffs and landings, climbing at a steep angle of 32 degrees. The aircraft did not require electric charging infrastructure, as many electric vertical takeoff and landing (eVTOL) air taxis do, because its propulsion unit charges the batteries in flight.

All the while, the Goldfinch produced just 55 decibels of noise, equivalent to the volume of a typical conversation, while flying overhead at 500 feet. Electra says its full-scale design, which will carry nine passengers or up to 2,500 pounds of cargo on trips up to 500 sm (434 nm), will be inaudible from the ground at its typical cruise altitude.

It seeks to certify a full-scale model under FAA Part 23 regulations by 2028.

“eSTOL technologies increase the number of available landing sites by orders of magnitude relative to traditional fixed wing aircraft while providing for higher cruise speeds, lower costs, and lower noise than vertical lift solutions,” said JP Stewart, vice president and general manager of Electra. “These first flights from a field demonstrate the beginnings of this strong capability that we will continue to develop.”

Electra’s eSTOL achieves its incredibly short runway requirement through the use of blown lift propulsion. Airflows are guided over the wing into flaps and ailerons that redirect them toward the ground, adding to thrust from the aircraft’s eight electric motors. This allows the vehicle to take off at what Electra describes as neighborhood driving speeds.

Though the manufacturer has several commercial customers lined up for its flagship design, it also views the eSTOL as ideal for airlift operations and agile combat employment, a U.S. Air Force doctrine that calls for the rapid deployment of assets to dispersed locations.

The military will be its first customer, but Electra in January surpassed 2,000 aircraft preorder sales from private partners including JSX, Bristow Group, and JetSetGo.

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On June 24, the firm’s “first-of-its-kind” hydrogen-electric, vertical takeoff and landing (hVTOL) demonstrator completed a 532 sm (462 nm) flight—about the distance between San Francisco and San Diego—above Marina, California, home to the Joby’s test facility and pilot production line. The aircraft landed with more than 10 percent of its hydrogen fuel remaining, with water the only byproduct of the flight.

Joby believes the test, which included a vertical take off and landing, represented the first forward flight for a liquid hydrogen-powered eVTOL aircraft. The company said hydrogen is a key piece of its future plans.

“We’re excited to now be building a technology stack that could redefine regional travel using hydrogen-electric aircraft,” said JoeBen Bevirt, founder and CEO of Joby. “Imagine being able to fly from San Francisco to San Diego, Boston to Baltimore, or Nashville to New Orleans, without the need to go to an airport and with no emissions except water. That world is closer than ever.”

The development signals a shift in Joby’s stated business philosophy, which before Thursday was centered around flying urban air mobility (UAM) routes within cities.

In a blog post penned by Bevirt and Raffaele Russo, business manager for new technologies at Joby, the company’s top brass said regional air mobility (RAM) is also on the agenda. The firm has alluded to a regional service before, but Thursday’s developments appear to confirm that one is in the works.

“Although the specific energy of batteries is improving, their weight will continue to limit the application of electric aircraft to short-distance travel,” the blog post reads. “To serve regional markets, we plan to use hydrogen to increase the potential range and payload of electric aircraft.”

Joby’s hydrogen-electric program builds on the technology developed by its subsidiary H2FLY, acquired in secret in 2021.

The manufacturer built the hydrogen-electric demonstrator by modifying one of its battery-electric aircraft, which has already flown more than 25,000 miles, with a hydrogen fuel tank capable of storing up to 40 kilograms of liquid, supercooled hydrogen. It includes a smaller battery cell, which provides extra power during takeoff and landing.

The design employs the same airframe and overall architecture as its battery-electric counterpart. It will use the same takeoff and landing sites and operations team, as well as ElevateOS—a proprietary, Uber-like software suite unveiled in June.

ElevateOS comprises a pilot app, rider app, operations suite, and matching system that connects riders with aircraft based on departure time, arrival time, and location. It includes an integration with the Uber app, allowing Uber customers to book Joby flights and vice versa.

The hydrogen-powered model also includes the H2F-175 hydrogen fuel cell, built by H2FLY, which produces electricity and heat with water as the sole byproduct. The fuel cell powers the aircraft’s six electric motors, which feed into tilting propellers that assist in both hover and forward flight, and charges the batteries while they are deactivated in cruise mode.

The technology was deployed about one year ago during a milestone H2FLY flight, which Joby claims was the first crewed flight of a hydrogen-electric aircraft with a runway takeoff.

According to Joby’s estimate, the hydrogen-electric model will have a greater payload than a battery-electric design or an aircraft using an equivalent amount of jet fuel.

Bevirt is also bullish on hydrogen production, pointing to the U.S. Department of Energy’s $7 billion investment in clean “hydrogen hubs.” He noted that hydrogen can be produced using a variety of low- or zero-emission sources such as wind or water power, which could help the aviation industry meet commitments to eliminate emissions by 2050.

“We recognize that broadly commercializing hydrogen will require doing the hard miles on regulation and infrastructure, along with fuel storage and distribution, but we have demonstrated that regional hydrogen-electric flight is possible today,” Bevirt and Russo wrote in Thursday’s blog post.

Bevirt said the bulk of the work Joby has done to certify its flagship, battery-electric air taxi will carry over to commercializing a hydrogen-electric variant. The company’s hydrogen-electric activities are supported by Agility Prime, the vertical lift technology division of the U.S. Air Force innovation arm, AFWERX.

“Agility Prime has been very supportive of hydrogen-powered aircraft development and testing as it aligns with the program’s goals to advance transformative vertical lift technologies and broader Department of Defense operational energy goals of energy substitution and diversification, and energy demand reduction,” said Jacob Wilson, acting branch chief of Agility Prime.

Joby is also collaborating with AFWERX’s Autonomy Prime division, which, as the name implies, develops self-flying aircraft.

The company in June acquired autonomous flight company Xwing for an undisclosed fee and intends to build a self-flying version of its flagship air taxi in the future, using Xwing’s Superpilot software. U.S. competitor Wisk Aero and Chinese eVTOL manufacturer EHang are among the handful of firms looking to fly autonomous air taxis at launch.

Joby aims to launch commercial operations with its flagship battery-electric air taxi in 2025, in partnership with Delta Air Lines. New York and Los Angeles are slated as the company’s first U.S. markets.

The aircraft is designed for a pilot to fly as many as four passengers on trips up to 100 sm (87 nm), cruising at 200 mph (174 knots). In the U.S., Joby will operate the model itself.

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Boom Supersonic’s XB-1 jet demonstrator did not reach supersonic speeds during the test flight. But the inaugural flight of the aircraft—a precursor to Boom’s supersonic, sustainable aviation fuel-powered Overture—marks a key milestone nonetheless.

“When I last flew Concorde in 2003, I knew that this day would come,” said Captain Mike Bannister, former chief Concorde pilot for British Airways. “The first flight of the XB-1 supersonic demonstrator is a significant achievement toward making sustainable supersonic flight a reality.”

The XB-1, which Boom says is the world’s first independently developed civil supersonic jet, combines carbon fiber composites, advanced avionics, digitally optimized aerodynamics, and an advanced supersonic propulsion system. These technologies will also be present on Overture, which is being developed to carry 64-80 at twice the speed of subsonic airliners.

The demonstrator is 62.6 feet long with a 21-foot wingspan. Its three GE J85-15 engines produce a combined max thrust of 12,300 pounds of force. Boom chief test pilot Bill “Doc” Shoemaker took it off the runway at Mojave Air & Space Port, flying in the same airspace that has hosted many historic first flights.

“I’ve been looking forward to this flight since founding Boom in 2014, and it marks the most significant milestone yet on our path to bring supersonic travel to passengers worldwide,” said Blake Scholl, founder and CEO of Boom Supersonic.

A T-38 chase aircraft monitored the XB-1 in the air, verifying factors such as altitude, airspeed, and airworthiness during flight. The company performed an initial assessment of the XB-1’s handling qualities, including airspeed checks with the chase aircraft, and assessed its stability in the landing attitude at a high angle of attack.

According to Boom, the aircraft met all of its test objectives. These included achieving an altitude of 7,120 feet and speeds up to 238 knots (273 mph).

The test flight is meant to validate the XB-1’s key technologies, such as an augmented reality vision system comprising two nose-mounted cameras that feed a high-resolution pilot display.

Another crucial component tested was the engine, which converts kinetic energy to pressure energy with supersonic intakes that slow supersonic air to subsonic speeds. Boom says this will allow conventional jet engines to power Overture from takeoff through supersonic flight.

The next step for the engineering team will be expanding the flight envelope for the XB-1. That will allow it to validate its performance and handling qualities through and beyond Mach 1, speeds Overture is expected to reach.

Boom intends for Overture to fly at Mach 1.7, or just over 1,300 mph. For comparison, Concorde flew at Mach 2. But unlike Concorde, Overture is designed to run on 100 percent SAF.

Leonardo is the engineering lead for the Overture’s fuselage structural components integration and will manufacture the aircraft’s composite structure. Other parts that will come from suppliers include wings designed by Aernnova, nacelles manufactured by Collins Aerospace, and Honeywell’s Anthem flight deck.

Scholl previously told The New York Times that the company’s goal is to fly passengers anywhere in the world within four hours—for only $100. That’s inexpensive compared to most one-way commercial flights, let alone Concorde, which cost passengers thousands of dollars.

However, don’t worry about supersonic booms over your backyard. Overture will only fly supersonic on overwater routes, since the FAA has banned it over the continental U.S.

Boom’s order backlog for Overture includes 130 orders and preorders, including 15 aircraft for American Airlines and 20 apiece for United Airlines and Japan Airlines.

The manufacturer’s $60 million U.S. Air Force contract should help speed development of the aircraft, giving it a potential customer as well. Boom is also partnered with Northrop Grumman to design a special mission variant of Overture for potential U.S. military operations, disaster response, and high-speed surveillance.

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Aircraft manufacturer Electra.aero’s EL-2 Goldfinch demonstrator pays homage to its namesake’s golden hue. Unlike a bird, however, the hybrid-electric ultra-short takeoff and landing (eSTOL) aircraft took off from the runway like a conventional plane once on Nov. 11 and again on Sunday, marking its inaugural flights.

The former was an all-electric test. But Electra said the latter was the eSTOL design’s first in hybrid configuration. Both flights were piloted by Cody Allee, chief technology officer of ABSI Aerospace & Defense and a former U.S. Marine Corps pilot, at Manassas Regional Airport (KHEF) in Virginia.

“The first hybrid flight lasted 23 minutes, reached an altitude of 3,200 feet, and covered a distance of approximately 30 miles,” said JP Stewart, vice president and general manager of Electra. “We’re looking forward to further expanding the envelope of this aircraft and demonstrating the full capability of Electra’s technology.”

Electra said its two-seat Goldfinch demonstrator is the first blown-lift aircraft that uses distributed electric propulsion and a hybrid-electric propulsion system. Blown lift directs slipstream flows back over the wing into large flaps and ailerons. This directs flows downward to “multiply” lift, allowing the eSTOL to take off and land at “neighborhood driving speeds.” By the company’s estimate, the demonstrator needs just 300 feet of runway.

Unlike the tiltrotor design common to electric vertical takeoff and landing (eVTOL) models, Electra’s eSTOL has no hover or transition phase because it relies on fixed wings and rigid propellers. In addition to removing complexity from the design, the fixed-wing architecture gives Goldfinch a path to be certified as a multiengine, Level 3, low-speed airplane under FAR Part 23 and be operated with a standard pilot’s certificate in the airplane category.

The aircraft’s eight electric motors run on a small turbogenerator that uses hybrid-electric power to recharge its batteries. Electra says this reduces emissions (by 30 percent) and noise (75 dBA at 300 feet, equivalent to a vacuum cleaner) below those of traditional airplane or rotorcraft. There’s also the benefit of added range and payload, stemming from Goldfinch’s lack of reliance on ground-based electric chargers and the reduced energy requirements of blown lift.

The Goldfinch demonstrator that flew this month is a predecessor to Electra’s flagship, nine-passenger model for commercial and government customers. That full-scale design is expected to cruise at 175 knots for up to 500 sm (434 nm), while carrying twice the payload (up to 2,500 pounds) of eVTOL designs with the same energy requirements.

Its runway requirement is projected to be even shorter—just 150 feet, half the length of a football field. And all of this comes with the promise of 70 percent lower operating costs than “vertical alternatives.”

“The aim of Electra is to fill a gap in air travel between 50 and 500 miles, where most trips today are made by automobile,” said Electra founder and CEO John Langford. “The key to saving time is to operate close in, which means getting in and out of small spaces quietly and safely, while still being fast enough to cover long distances. Electra will be able to take you from downtown Manhattan not only to Kennedy Airport [KJFK], but to Washington, D.C. It will bring air service to thousands of communities where air travel today is not a practical or affordable option. It also opens vast new opportunities for middle-mile cargo logistics.”

The company so far has a backlog of more than 1,700 preorders of its flagship model from more than 30 customers, which it values at about $6 billion. Customers include Houston-based helicopter provider Bristow Group, airline Ravn Alaska, and Latin American on-demand private aviation platform Flapper. It also has plans to fly in Asia, Australia, and the Middle East.

In addition, Electra is developing a Goldfinch prototype for the U.S. Air Force under a contract with AFWERX, the department’s innovation arm. The agreement, worth up to $85 million, will see Air Force pilots take the aircraft out for testing and validation of operational use cases.

The Air Force has been a valuable partner for Electra, which as of August had six active Small Business Innovation Research (SBIR) and Small Business Technology Transfer (SBTT) Phase II and III contracts. Those agreements have allowed it to mature Goldfinch’s blown-lift aerodynamics, hybrid-electric powertrains, flight controls, and other features.

In addition to passenger transport, on-demand urban air mobility services, and defense applications, Electra expects Goldfinch to handle cargo logistics, executive transport, humanitarian aid, disaster response, and a variety of other use cases.

While the full-scale Goldfinch’s FAA certification isn’t expected until 2028, Sunday’s test flight was a promising development for Electra as it seeks to establish a new mode of regional transportation.

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That truism holds whether you’re approaching the grand event at Aéroport Paris-Le Bourget in France as a spectator, a member of the trade, or an exhibitor proposing a new product, service, or technology for the future.

For us, we took the metro, then the train, then walked the 2 miles to the entrance gate, 1 hour, 15 minutes each way. There were buses—but we walked faster than they could move through the traffic. For those who had houses rented nearby, the time en route fluctuated horribly—and was no better, stuck in the congestion. I honestly considered electric vertical takeoff and landing craft in a different light—but could we all be buzzing around? Would it just transfer the congestion from the streets to the skies?

But for those exhibiting, the road to #PAS2023 clearly began years—even a decade or more—ago, as the maturity of solutions like those very eVTOLs shone brightly as a force field against the pressures to decarbonize. And they joined sustainable aviation fuel, hydrogen-powered aircraft, and new ways to make lift in concert to assuage the skepticism that we could collectively achieve the net-zero emission goals the industry has promised by 2050.

So, How Did it Feel?

Normally rotating years with the similar aerospace trade show of record in Farnborough, UK, “Le Bourget” last commenced in July 2019, a victim in 2021 of the extended seizures of the pandemic. 

I’ve spent the bulk of my career in general aviation—with a short foray at a Boeing subsidiary, but still in aviation training—so the while Paris the city wasn’t new to me, the Paris Air Show was. So, in late June, we formed a vacation around PAS, to visit friends in Paris and see for myself what the spectacle would hold. 

How would it feel to walk around a static display not just hosting the latest from Gulfstream and Dassault and Daher, but also Boeing, Airbus, and Embraer’s commercial transport category jets and bristling military hardware? As it turns out, imposing to stand next to, but also thrilling. And I once again had that feeling I’d been a fighter pilot in another life when I sat in the Super Tocano at Embraer. No, they didn’t allow selfies…

Dassault celebrated its 60th anniversary with Mirage and Rafale displays across the aisle from its trijet Falcon 8X, 2000LXS, the nearly-certificated 6X and the 10X mockup. We watched the airshow for a bit after lunch with former Dassault test pilots from the deck of the media chalet—a completely different airshow performance than the ones I know so well from EAA AirVenture and Sun ’n Fun and the Reno Air Races.

In fact, I had a chance to sit in on one of the pilot briefings for the airshow on Thursday morning and climbed the stairs in the rain to the control-tower-like command center from which the air boss and his deputies would coordinate the whole affair. A common thread? After briefing the weather, boxes, and run of show, everyone save the pilots were dismissed for the debrief on the previous days’ events. The debrief stays sacred and reserved to just those flying—to preserve its integrity and allow for the free flow of information and safety recommendations. More on that in a follow on story for FLYING.

But Wait, What About the Big Guys?

We took a brief tour of the Boeing 777X-9, all kitted out inside for flight test—just like the flight test articles of the much smaller jets. I think of being on board the Cessna Citation Mustang conforming prototype in 2006. So the 777X is just… a lot bigger. 

While on board, we talked with Brad Surak, who heads up Boeing Digital Services now, with Jeppesen, ForeFlight, and now Cloud Ahoy under his oversight—probably one of the few GA spaces left within the Big B. The good news? It sure sounds like they are allowing the teams they’ve acquired to keep focused in their respective lanes. More on that, too, in a later story.

Technology on Display

And what of the halls filled with delegations from countries around the globe, presenting their research, and workforce, and production skill sets as solutions? Mockups, prototypes in various states of compliance, and an endless stream full of great ideas.

My personal favorite—and yes, the subject of upcoming coverage in the magazine—was the EcoPulse technology demonstrator, which is a joint project between Daher, Safran, and Airbus. It appeals to me not only because of its TBM DNA, but because it is so completely and purposefully not-even-close to a commercial product. And it was on display in its full reveal. 

We know that aerospace manufacturers experiment all the time to drive forward—and as aviation journalists we relish the chase, trying to figure out what the next move will be from a favorite OEM. There are so many questions to answer—and it was with clear delight that the program’s manager for Daher, Christophe Robin, walked us around F-WECO, essentially telling us everything that was working as well as a bunch of things that never would. And they were so glad to find out. Though I’m sure there’s more they’re not quite ready to share yet…

Another great example of future-forward application of new sources of power for flight? The Elfly project underway in Norway. Taking a tried and true airframe style based somewhat on the amphibious Grumman Albatross, the Noemi (for “no emissions”) plans to utilize quiet electric motors to access a string of seaplane ports along Norway’s fjordic coast. They hope to be operational commercially in 2029.

And the Elephant in the Room?

So, you may be asking, did we see protests like the ones popping up across France—and throughout Europe—all summer, spiteful towards private aviation? 

Security was like an unseen hand, most of the time, and it wrapped itself around Le Bourget as though wearing a velvet glove. We passed a few minutes every morning in the media entrance line having bags and bodies searched, as you might expect—and the maze to get in the general entrance gate was really interesting—made purposefully difficult to run straight through.

But we spent more than an hour each day walking from the train station to the airport gates, with no signs of strife. There were, however, more police vans assembled along the perimeter roads than I have seen in after several years of living in the western EU. Most of the gendarmerie appeared to be playing Sudoku on their phones.

And within Paris itself, we were fortunate too—aside from getting a dose of eau de Metro during rush hour a few times, we escaped unscathed and fully provisioned with wine, paté, and great stories for the months ahead to pursue.

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Electra.aero unveiled the eSTOL (electric short takeoff and landing) demonstrator at a special ceremony at 5 p.m. EDT Monday to present the concept and answer questions about both the technology and vision for its future use. According to the company, the aircraft represents the first use of blown lift using distributed electrical propulsion, allowing the airplane to to take off and land in short distances.

The two-seat airplane utilizes eight motors and an internal hybrid-electric power generator to recharge its battery system. The company plans to put the aircraft into a full flight test program this summer as it works towards a nine-seat production model. The production version is expected to begin testing in 2025. In all, the company anticipates the final version to carry 2.5 times the payload and exhibit a 10-times-longer range with 70 percent lower operating costs than vertical takeoff alternatives. Electra.aero claims this will transpire “with much less certification risk, proving that climate-friendly technology can also be cost-effective.”

• READ MORE: Electra eSTOL Developer Acquires Airflow

“In the three years since we founded Electra, we’ve designed our eSTOL aircraft, validated our blown-lift technology with a subscale demonstrator, and run a fully integrated test of our 150-kilowatt, hybrid-electric generator at full scale,’’ said John Langford, founder and CEO of Electra.aero. “Now we’re ready to test the entire system with this technology demonstrator aircraft. We can’t wait to fly this plane and show the world what our eSTOL aircraft can do.”  

Electra expects a 1,900-pound passenger and cargo load capacity, and it’s shooting for a 434 nm (500 sm) range.

Certification and Investor Backing

The idea is to give operators the best of both worlds—airplane and rotorcraft—with the capability to use similar spaces to land and take off. Entry into service is hoped for 2028, with the company seeking FAA Part 23 type certification by that time. Electra’s financial backing comes from a recent $30 million funding award from the U.S. Air Force as part of a total of $85 million it can draw from. The company also holds letters of intent from more than 30 potential customers, with a valuation of $4 billion if fully realized.

“Electra was founded to build electric aircraft that make sense,” said J.P. Stewart, vice president and general manager for Electra. “We are meeting market demand for cleaner, cost-effective aircraft that can fly people and cargo closer to where they want to go, and this technology demonstrator aircraft will prove that our eSTOL technology makes that possible.” 

Launch partners Bristol and Southern Airways were on hand for the rollout, along with representatives from the Air Force’s Agility Prime program. Ground tests will continue this month, with first flight anticipated later this summer.

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