Piasecki plans to use HyPoint's air-cooled hydrogen fuel cells for the PA-860 compound helicopter it aims to bring to market by 2025. Under a new partnership, the two companies will also offer the technology to developers of eVTOL aircraft.

Ampaire is using a converted Cessna 337 Skymaster as a flight testbed for the electric propulsion system it intends to employ to convert existing aircraft such as the Twin Otter and the Islander, promising operating cost savings of around 30 percent. The California-based company is conducting flight trials in the UK with airport and airline partners.

RED Aircraft's A03 piston engine is being used for new programs such as Hybrid Air Vehicles' Airlander 10 airship and Otto Aviation's Celera 500L aircraft, for which it promises a compelling combination of power and fuel efficiency. The German company, which has already supplied high-performance engines to many leading carmakers, says that the technology is well-suited to hybrid-electric powertrains and is also a retrofit option for existing aircraft and rotorcraft.

Archer and parking garage group Reef are working to identify rooftop sites for urban air taxi services across America. They say that underused locations will provide cost-effective ground infrastructure while requiring only "light retrofitting."

Vertiport Chicago is a privately developed facility that is conveniently located to many of the most popular business districts of the midwest U.S. city. It is open around the clock and has space to take eight helicopters simultaneously, with room to accommodate new operations, including eVTOL air taxi services. What's more, local politicians fully support further expansion of activity on the downtown site.

Embraer subsidiary Eve Urban Air Mobility says it will "deploy" at least 100 of its four-passenger eVTOL aircraft to unspecified operators in the Asia Pacific region, with flights to be marketed via Ascent's rideshare platform. The company says that beginning in 2026 when the EVA model is due to enter commercial service, it will guarantee at least 100,000 flight hours for trips out of cities including Singapore; Tokyo; Bangkok, Thailand; Manila, Philippines; and Melbourne, Australia.

Electra's hybrid-electric eSTOL aircraft will be operated by a single pilot and carry up to seven passengers on flights of up to around 500 miles when it enters service in 2026. The company has begun early engagement with the FAA over the type certification process under Part 23 rules, having recruited an experienced director of certification who has previously held senior roles with several other aircraft developers, including supersonic pioneer Aerion.

The Modular Approach to Hybrid-Electric Propulsion Architecture (MAHEPA) is a European collaborative project to advance new propulsion technology for aviation. Following successful trials in 2020, this year partners have been focusing their efforts on flying two hybrid-electric demonstrator aircraft called the Panthera and the Hy4. In this short video, Henry Emrhardt from the German Aerospace Center (DLR) explains how the work is being conducted by his organization, along with several leading universities and companies including Pipistrel, hydrogen specialists H2Fly, and Compact Dynamics. MEHAPA has received funding from the European Union’s Horizon 2020 research and innovation program.

Jaunt Air Mobility is aiming to get its family of eVTOL aircraft, featuring both a main rotor and wing-mounted propellers, certified under existing FAA Part 29 rules for helicopters by the end of 2025.