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AINonline • Charles Alcock

H2Fly targets hydrogen fuel-cell aviation with 2 kW/kg power-density threshold

H2Fly, the hydrogen propulsion unit owned by Joby Aviation, says aviation competitiveness hinges on reaching at least 2 kW/kg in hydrogen fuel-cell systems. The company is pushing a new hydrogen powertrain iteration aimed at boosting power density beyond earlier designs.

2026-05-14T09:27:39.655287-07:00

FlightGlobal

Rolls-Royce spotlights hydrogen ambition after Stennis ground tests on modified Pearl business-jet engine

2026-05-12T08:27:50.584480-07:00

Vertical Mag

Unither Bioélectronique completes piloted hydrogen-electric helicopter circuit flight in Quebec

2026-05-07T21:42:55.615634-07:00

Aviation Business News

Rolls-Royce and easyJet complete 100% hydrogen ground test of modified Pearl 15 at full takeoff power

2026-04-29T10:56:05.746494-07:00

News Timeline

Vertical Mag

Unither Bioelectronics advances Project Proticity hydrogen fuel-cell flight demonstrator for R44 rotorcraft Unither Bioelectronics expanded the flight envelope of its Project Proticity hydrogen fuel-cell-powered Robinson R44 technology demonstrator, building on earlier rotary-wing integration work. The step signals continued progress from proof-of-concept toward operationally relevant performance limits for hydrogen-electric rotorcraft.

2026-05-15T03:35:28.996506-07:00

Unither Bioelectronics advances Project Proticity hydrogen fuel-cell flight demonstrator for R44 rotorcraft

AINonline

H2Fly targets hydrogen fuel-cell aviation with 2 kW/kg power-density threshold H2Fly, the hydrogen propulsion unit owned by Joby Aviation, says aviation competitiveness hinges on reaching at least 2 kW/kg in hydrogen fuel-cell systems. The company is pushing a new hydrogen powertrain iteration aimed at boosting power density beyond earlier designs.

2026-05-14T09:27:39.655287-07:00

H2Fly targets hydrogen fuel-cell aviation with 2 kW/kg power-density threshold

FlightGlobal

Rolls-Royce spotlights hydrogen ambition after Stennis ground tests on modified Pearl business-jet engine Rolls-Royce is touting combustion ground-test progress at NASA’s Stennis Space Center, using a modified Pearl business-jet engine to validate performance for future hydrogen pathways. The company framed the Stennis results as “polished” performance momentum while it continues positioning hydrogen as a credible low-emissions option for aviation propulsion.

2026-05-12T08:27:50.584480-07:00

Rolls-Royce spotlights hydrogen ambition after Stennis ground tests on modified Pearl business-jet engine

Vertical Mag

Unither Bioélectronique completes piloted hydrogen-electric helicopter circuit flight in Quebec Unither Bioélectronique says it has completed the world’s first piloted hydrogen-electric helicopter circuit flight in Quebec, marking a major step in validating hydrogen-electric propulsion for rotorcraft operations. The CAAM update frames the sortie as a proof point for sustainable aviation progress, moving beyond ground tests toward operational flight.

2026-05-07T21:42:55.615634-07:00

Unither Bioélectronique completes piloted hydrogen-electric helicopter circuit flight in Quebec

AINonline

GKN Aerospace-backed start-up emerges from University of Nottingham JV to tackle cryogenic power distribution The GKN Aerospace-backed Start-up, developed via the H2Gear program and a joint venture with the University of Nottingham, is focused on cryogenic power distribution. The effort reflects a targeted push to translate hydrogen-related propulsion and power concepts into deployable distribution systems, building on ongoing H2Gear-linked R&D.

2026-05-06T07:33:30.620309-07:00

GKN Aerospace-backed start-up emerges from University of Nottingham JV to tackle cryogenic power distribution

SpaceNews.com

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Interlune wins $6.9M NASA SBIR Phase III contract for lunar regolith payload to extract helium-3 and hydrogen Seattle-based Interlune received a $6.9 million NASA SBIR Phase III contract to develop and test a payload suite designed to extract and measure helium-3 and hydrogen in lunar regolith. The 18-month Earth testing window feeds a 2028 mission on a commercial robotic lander.

2026-05-04T08:03:40.645846-07:00

Interlune wins $6.9M NASA SBIR Phase III contract for lunar regolith payload to extract helium-3 and hydrogen

FlightGlobal

H2Fly (Joby) advances hydrogen fuel-cell powertrain with weight/volume reductions and performance step-up H2Fly, the hydrogen propulsion specialist owned by Joby Aviation, says its latest hydrogen fuel-cell powertrain iteration has cut weight and volume. The developer is nearing disclosure of a fuel-cell design it expects to deliver materially improved performance versus earlier versions as development accelerates.

2026-04-29T15:09:01.832742-07:00

H2Fly (Joby) advances hydrogen fuel-cell powertrain with weight/volume reductions and performance step-up

Aviation Business News

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Rolls-Royce and easyJet complete 100% hydrogen ground test of modified Pearl 15 at full takeoff power Rolls-Royce and easyJet have completed a major hydrogen fuel milestone, running a modified Rolls-Royce Pearl 15 aircraft engine on 100% hydrogen at full takeoff power during a ground test at NASA’s Stennis Space Center in Mississippi. The result advances research into lower-emission aviation fuel pathways.

2026-04-29T10:56:05.746494-07:00

Rolls-Royce and easyJet complete 100% hydrogen ground test of modified Pearl 15 at full takeoff power

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Hydrogen News

H2Fly targets hydrogen fuel-cell aviation with 2 kW/kg power-density threshold

Rolls-Royce spotlights hydrogen ambition after Stennis ground tests on modified Pearl business-jet engine

Unither Bioélectronique completes piloted hydrogen-electric helicopter circuit flight in Quebec

Rolls-Royce and easyJet complete 100% hydrogen ground test of modified Pearl 15 at full takeoff power

News Timeline