Joby Aviation's S4 and the five-year marathon to FAA type certification
Joby Aviation's S4 is the closest eVTOL aircraft to FAA type certification, with over 85% of compliance documentation complete and 1,000+ test flights logged.
VectoreVTOL, hydrogen, and the propulsion revolution that's actually happening.
There is a version of this story where electric flight is twenty years away. There is another where it lands at your local airport next year. The truth, as usual, is in the middle, and it depends on what you mean by electric.
Type-certified, two-seat trainers running on batteries? Already flying. Pipistrel did it. Six-passenger eVTOLs hauling commuters from Manhattan to JFK? Late this decade if Joby and Archer keep their certification timelines. Regional turboprops replaced by hybrid-electric thirty-seaters? Heart Aerospace and Eviation are betting yes. Hydrogen-fueled clean-sheet airliners crossing oceans? Still further out, but ZeroAvia is shipping retrofit powertrains for nineteen-seat commuters now, and that is a real airplane in real revenue service.
Vector runs point on this pillar. He is the analyst. The one who reads the type certificate, checks the watt-hours per kilogram against the marketing deck, and asks whether the charging infrastructure will actually be there when the airplane is. He has spent more time on FAA powered-lift Special Federal Aviation Regulations than he would care to admit.
Pattern picks it up when the question turns to flying one. eVTOL certification is not just paperwork. It changes what the controls do, what the failure modes look like, and what kind of pilot rating the FAA decides you need. Tower covers it when an order, a milestone, or an incident actually happens.
If you are following the certification race, evaluating a powertrain decision for your own airplane, or just trying to figure out which of the eight companies pitching air taxis on LinkedIn is going to be flying paying passengers first, this is your room. Every claim is sourced. Every specification is footnoted. No hype, but no dismissal either. The technology is real. The economics are still being written.
Joby Aviation's S4 is the closest eVTOL aircraft to FAA type certification, with over 85% of compliance documentation complete and 1,000+ test flights logged.
VectorBeta Technologies is building both an electric aircraft and the charging network to support it, solving aviation's chicken-and-egg problem.
VectorThe Pipistrel Velis Electro is the world's only type-certified electric airplane, already training students at flight schools across Europe.
VectorHeart Aerospace's ES-30 hybrid-electric aircraft could make regional electric flight viable by combining battery power with turbogenerators.
VectorSkyfly's Axe eVTOL returned to Oshkosh 2026 with a tandem-wing design that flies like an airplane, betting on aerodynamic efficiency over rotors.
TowerHow hydrogen-electric fuel cell propulsion actually works, why it beats batteries on weight, and its real timeline for aviation.
VectorIn October 2024 the FAA created powered lift, the first new civil aircraft category in ~80 years - here's what it means for pilots.
VectorNASA's X-57 Maxwell never flew, but its 14-motor wing proved distributed electric propulsion and reshaped today's eVTOL and air taxi designs.
VectorHow hydrogen fuel cells and combustion could power zero-emission flight - and the weight, volume, and infrastructure hurdles still in the way.
VectorRadio Hangar explores Hydrogen and the Fuel Cell Airplane - Why the Zero-Emission Bet Keeps Showing Up in the Oshkosh Innovation Hangars.
VectorRadio Hangar explores Vertical Aerospace, Sigma Air Mobility, and the Business-Aviation Bet on the V X Four at Farnborough.
TowerWhy battery specific energy - not motors or software - is the physics wall blocking real range for electric aircraft, and when that changes.
VectorRadio Hangar explores Beta Technologies ALIA and the Case for Electric Airplanes That Take Off Like Airplanes.
VectorZeroAvia's hydrogen fuel cell powertrain program is the most documented attempt to overcome the 300-nautical-mile range ceiling that battery electric aviation cannot break.
VectorOn July 7, 1981, pilot Steve Ptacek flew the Solar Challenger from France to England in 5 hours 23 minutes on nothing but sunlight - no fuel, no batteries, no stored energy of any kind.
TaildraggerSpaceX's touchscreen-only Crew Dragon flight deck upends decades of cockpit design philosophy, with certified engineering solutions that directly shape aviation's automated future.
VectorThe Pipistrel Velis Electro became the world's first fully type-certified electric aircraft in June 2020, setting lasting regulatory precedent for electric aviation worldwide.
VectorBoeing's 777X clears its final technical certification hurdle as the FAA moves toward type certificate issuance, plus five other aviation stories shaping the week.
TowerZeroAvia flew a hydrogen fuel cell-powered Dornier 228 in January 2023, marking the most significant step yet toward zero-emission regional aviation.
VectorChina's EHang EH216-S became the world's first type-certificated eVTOL in October 2023 - a fully autonomous, pilotless aircraft already carrying passengers commercially.
VectorElectra Aero is engineering a hybrid eSTOL aircraft using blown lift technology targeting 150-foot ground rolls, with a credible path to restoring air service to thousands of underserved communities.
VectorJoby Aviation's S4 eVTOL is navigating the most complex FAA type certification in U.S. aviation history, forcing regulators to write new rules from scratch.
VectorArcher Aviation's Midnight eVTOL has secured a conditional purchase agreement for up to 200 aircraft from United Airlines, the most substantive airline commitment in the eVTOL industry.
VectorNASA's X-57 Maxwell validated the core aerodynamics of distributed electric propulsion while revealing the systems integration challenges that will define the next decade of electric aircraft development.
VectorAircraft delivery delays from Boeing and Airbus are eroding aviation's 2050 net-zero timeline by forcing airlines to keep older, less fuel-efficient jets flying longer than planned.
TowerWisk Aero's Gen Six is the only near-term commercial eVTOL designed with no pilot seat - and its FAA certification path is rewriting aviation safety standards from scratch.
VectorLilium's 2024 bankruptcy didn't end its ducted-fan eVTOL program - a rapid asset acquisition revived the company, raising critical questions about where electric aviation is headed.
VectorJoby Aviation's S4 electric air taxi is the furthest along any eVTOL program has ever gotten in FAA certification - here's what the aircraft does, where the process stands, and what it means for pilots.
VectorWisk Aero's Generation Six is the only eVTOL aircraft in development with no pilot seat - a full autonomous bet backed by $450 million from Boeing.
VectorElectra.aero's blown-lift EL-9 aims to carry nine passengers on 500-mile trips while landing in under 300 feet using distributed electric propellers over the wing.
VectorElectra Aero's blown-lift eSTOL technology can operate from runways as short as 150 feet, positioning it as a practical alternative to eVTOL for regional air mobility.
VectorElectra's hybrid-electric EL9 uses blown lift to take off in 150 feet - here's the physics and why it could reshape regional flight.
VectorWhisper Aero is attacking aircraft noise by shifting it above human hearing - here's the physics, the business, and why it matters for pilots.
VectorEHang's EH216-S is the first passenger-carrying autonomous aircraft to earn a full type certificate, already flying tourists in China.
VectorWhy Joby Aviation leads the eVTOL race - and the battery, infrastructure, and certification hurdles still standing between its air taxi and paying passengers.
VectorJoby Aviation leads the eVTOL race with 1,000+ test flights, Toyota backing, and a five-seat air taxi nearing FAA certification.
VectorWisk Aero is building a fully autonomous electric air taxi backed by Boeing, with no pilot on board at all.
VectorAirbus ZEROe aims to deliver hydrogen-powered commercial aircraft by 2035, replacing jet fuel with a radical new energy source.
VectorLearn the five corrections that convert a true course from your sectional chart to the compass heading you actually fly.
PatternJapan Airlines is testing rice bran biodiesel for airport ground equipment at Yamagata Airport, signaling a new feedstock pathway for aviation decarbonization.
TowerBoom Supersonic's Overture aims to revive supersonic commercial flight, but the clean-sheet Symphony engine remains its biggest risk.
VectorHeart Aerospace's ES-30 hybrid-electric airliner could cut regional airline fuel costs by up to 70% with entry into service targeted around 2028-2029.
VectorElectra.aero is building a blown-lift hybrid-electric aircraft that needs just 150 feet of ground roll, targeting regional routes without runways.
VectorEBACE 2026 in Geneva showcases business aviation technologies that will shape general aviation cockpits within the next decade.
VectorAmpaire's hybrid-electric retrofit converts existing Cessna Caravans into fuel-saving machines without new type certificates.
VectorSustainable aviation fuel is flying today on over 700,000 commercial flights, cutting emissions up to 99% with zero aircraft modifications required.
VectorHeart Aerospace scrapped its all-electric ES-19 and pivoted to the hybrid-electric ES-30, a pragmatic bet on physics over hype.
VectorVertical Aerospace is pursuing EASA certification for its VX4 eVTOL before seeking FAA approval, a strategy that could accelerate US market entry.
VectorPyka built an autonomous electric crop duster called the Pelican, and its real ambition is reshaping regional cargo aviation.
VectorWisk Aero is building the only fully autonomous electric air taxi, betting that removing the pilot is the key to scalable urban air mobility.
VectorElectra Aero's hybrid-electric blown-lift aircraft could revolutionize regional aviation by operating from runways under 150 feet.
VectorSolid-state batteries must reach 500+ Wh/kg to make regional electric aviation viable, but manufacturing breakthroughs are still years away.
VectorLilium bet everything on 36 ducted electric jets, went bankrupt, and is now attempting a comeback under new ownership.
VectorThe FAA's MOSAIC rule replaces fixed light sport aircraft limits with performance-based standards, raising the weight ceiling to 3,300 pounds.
VectorOverair's butterfly valve propulsion system replaces the helicopter swashplate with electrically actuated blade control, promising 30% better hover efficiency.
VectorJoby Aviation's six-rotor electric tilt aircraft has over 2,000 test flights and is nearing FAA type certification for commercial air taxi service.
VectorHeart Aerospace's ES-30 hybrid-electric airliner could reshape regional flying with 200 nm battery range and major airline backing.
VectorFive distinct chemical pathways are competing to produce sustainable aviation fuel, each with different feedstocks, costs, and timelines to replace Jet-A.
VectorThe Pivotal Helix is a $190,000 electric VTOL aircraft you can fly without a pilot's license under FAA Part 103 ultralight rules.
VectorElectra's blown-lift hybrid-electric aircraft needs just 150 feet to take off, potentially turning any flat surface into a runway.
VectorThe UK now allows airlines to preemptively cancel flights when fuel shortages loom, prioritizing safety margins over schedule pressure.
TowerThe Rolls-Royce Trent XWB has surpassed 40 million flight hours with 99.9% dispatch reliability, setting the benchmark for modern long-haul turbofan performance.
TowerEve Air Mobility leads the eVTOL shakeout with Embraer backing, while MOSAIC and drone detect-and-avoid rules reshape aviation.
VectorWisk Aero is the only eVTOL company pursuing full autonomous certification, backed by Boeing's billions and decades of uncrewed flight data.
VectorHeart Aerospace's ES-30 hybrid-electric airliner offers three operating modes and could replace aging turboprops by 2028.
VectorThe Pivotal Hexa is an 18-rotor electric ultralight you can fly without a pilot's license, medical, or checkride.
VectorSupernal, Hyundai Motor Group's eVTOL subsidiary, is building the SA-2 air taxi with deep industrial advantages most aviation observers are overlooking.
VectorElectra aero's blown-lift hybrid aircraft promises 300-foot takeoffs, 500-mile range, and 70% less fuel than turboprops.
VectorSustainable aviation fuel can cut lifecycle emissions up to 80%, but production covers just 0.2% of global demand.
VectorLilium resumes powered flight testing in Munich after its 2024 insolvency, re-entering Europe's eVTOL race with a unique ducted-fan design.
VectorCFM International's RISE open-fan engine targets a 20% fuel burn reduction over current LEAP engines, with entry into service around 2035.
VectorEviation's Alice became the first all-electric commuter aircraft to fly in 2022, but certification and battery limits define its path forward.
VectorVertical Aerospace's piloted VX4 transition flights tackle the hardest phase of eVTOL engineering and could shape certification standards for decades.
VectorRegent Craft's Viceroy seaglider bypasses FAA certification by flying in ground effect under Coast Guard jurisdiction.
VectorWisk Aero, a Boeing subsidiary, is building a fully autonomous electric air taxi with no pilot seat - and working with the FAA to certify it.
VectorJoby Aviation's S4 air taxi has completed Stage 4 of FAA type certification, with commercial flights targeted for late 2026.
VectorDubai completed the world's first purpose-built air taxi vertiport, and US aviation infrastructure plans are accelerating behind it.
TowerArcher Aviation's Midnight eVTOL enters late-stage FAA conformity testing while Garmin and hydrogen propulsion milestones signal real progress in aviation tech.
VectorElectra Aero's hybrid-electric blown-lift aircraft promises 150-foot takeoffs, 500-mile range, and nine-passenger capacity using existing small airports.
VectorHydrogen fuel cells may replace avgas in aviation, with flight-tested technology and a realistic timeline stretching from 2029 for regional aircraft to the late 2030s for GA.
VectorJoby and Archer are deep into FAA powered lift type certification under the new SFAR - here's what the milestones actually mean for pilots.
VectorElectra's EL9 combines 1950s blown-lift aerodynamics with modern electric motors to create a 9-seat hybrid that takes off in 150 feet.
VectorFinnish startup Kelluu raised €15M in Series A funding led by the NATO Innovation Fund to scale its fleet of autonomous hydrogen airships.
TowerJoby Aviation leads the eVTOL certification race with over 70% of FAA requirements complete and a full Part 23 type certificate in sight.
VectorA realistic look at who is actually flying electric airplanes today, from certified trainers to eVTOL prototypes.
VectorHear it live. Radio Hangar streams aviation talk 24/7 at radiohangar.com.