UK commuter plane manufacturer Britten-Norman and hydrogen propulsion developer Cranfield Aerospace Solutions (CAeS) have announced their intention to merge their businesses, initially to create a fully-integrated zero-emission aircraft for entry into service by 2026. Britten-Norman makes the iconic Islander aircraft, a popular nine-seat commuter plane, while CAeS is pioneering hydrogen-electric fuel cell technology. The two have signed a Heads of Terms Agreement to merge by mid-year, in response, they say, to increasing demand from airlines and other operators wanting to switch to zero-emission aircraft that are backed by an OEM. Their announcement coincides with the rapid expansion of hydrogen powertrain retrofit programmes by ZeroAvia and Universal Hydrogen, and further progress elsewhere in electric and hybrid-electric aircraft development.

Britten-Norman and CAeS have been working together for more than two years on Project Fresson, through which they have been developing technologies needed to enable a hydrogen propulsion system for Islander aircraft. The project has been supported by funding from the UK government through the UK Aerospace Technology Institute, as well as more than £14 million ($17.5m) in private investment funds.

“By combining CAeS’s pioneering development of a hydrogen-electric fuel cell propulsion system with the existing and proven Britten-Norman aircraft technology, a clear and unambiguous route to market has been created with certification for passenger-carrying service planned for 2026,” said the companies on the planned merger.

The new, yet-to-be-named company will bring together investors from both businesses to progress the new integrated aircraft programme, which they intend to evolve from the initial commuter plane to an all-new zero-emission 100-seat aircraft.   

Once the merger is finalised, three CAeS investors, HydrogenOne Capital Growth, Safran Corporate Ventures and UAE-based investment company Strategic Development Fund will invest up to £10 million in the new business. Up to half will come from HydrogenOne, which is leading this funding round. As well, CAeS backers Cranfield University and US-based technology investor Motus Ventures will have shares in the new entity. They will be joined by Britten-Norman’s owners, including lead investor Alawi Zawawi. Further funding is also being raised to support the new company’s growth.

Cranfield Aerospace CEO Paul Hutton said the merger would accelerate his company’s plans to introduce an all-new zero emissions aircraft. “As other sectors decarbonise quickly, it is imperative that the aviation industry accelerates its own transition to new, clean aircraft,” he said. “Looking to the future, we will use the combined experience of Cranfield Aerospace and Britten-Norman to produce an entirely new aircraft design, optimised around hydrogen fuel cell technology.”

Britten-Norman specialises in twin-engine piston and turboprop short take-off and landing (STOL) aircraft, and has exported 97% of the 1,300 aircraft it has manufactured. “The merging of Britten-Norman and Cranfield Aerospace Solutions will create a new market leader in green aircraft manufacturing, bringing together joint strengths in aerospace manufacturing, certification and innovation,” said Britten-Norman’s CEO, William Hynett.

The companies said their merger would also produce the first OEM sub-regional aircraft powered by hydrogen, providing significant employment in low-or-zero emission aircraft manufacturing in the UK and boosting the country’s aerospace exports. The combined entity will incorporate seven sites in London, Cranfield, Gosport, Isle of Wight and Southampton in the UK and in Malta and Miami, with around 220 people employed.

The Britten-Norman merger with CAeS coincides with accelerated testing of two retrofit hydrogen powertrain systems for larger turboprop aircraft, one by joint US-UK company ZeroAvia, the other involving US-based Universal Hydrogen. ZeroAvia is currently testing a hydrogen powertrain prototype on a 19-seat Dornier 228 testbed aircraft and has just take delivery of a Q400 aircraft decommissioned by Alaska Airlines, to be converted to a testbed for a hydrogen propulsion system to power 40-80 seat planes (see article). Universal Hydrogen has also started test flights of a Q300 aircraft, retrofitted with portable hydrogen capsules. Universal’s system enables the transfer of containerised hydrogen pods directly to the aircraft they will power, without the need for separate airport infrastructure.

The shift towards all-electric or hybrid-electric commuter planes is gathering pace, with UK-based lessor Monte Aircraft Leasing the latest customer for the nine-seat Eviation Alice, signing a letter of intent to acquire up to 30 of the twin-engined, all-electric aircraft, which offers a 250 nautical mile (463 kilometre) range and a maximum speed of 480 kph. Monte is a specialist provider of low-or-no emission regional aircraft and supporting infrastructure. The order is the second this year for Eviation, which recently secured another 30-plane deal from Mexican regional operator Aerus.

Another US-based start-up, Odys Aviation, has just secured funding from Abu Dhabi-based aviation advisory group Knighthood Global, whose Chairman, former Etihad CEO James Hogan, and one of Knighthood’s partners, former KLM CEO Camiel Eurlings, will also serve on the Odys advisory board. They join the US Air Force as an investor in this Californian company, which is also competing in the nine-seat commuter aircraft market, but with a high-speed, long-range, hybrid-electric vertical take-off or landing (VTOL) plane. Although it has similar capacity to the Eviation Alice and the hydrogen-electric Britten-Norman Islander, the Odys craft will have vertical take-off and landing capacity, using flap-based thrust vectoring rather than swivelling engines to achieve lift, and enabling it to use airports, heliports or vertiports.

Its hybrid-electric powertrain will also enable it fly up to 320 kilometres on electric power, or just over 1,200 kilometres using a mix of electric and conventional gas turbines, which can be powered by sustainable aviation fuel. It is also designed to fly at up to 30,000 feet and speeds of up to 555 kph, powered by 16 propeller motors attached to a box-wing.

“Our plans are revolutionary, bridging the gap between existing technology and fully electric aviation,” said James Dorris, co-founder and CEO of Odys Aviation. “By collaborating with Knighthood, we will expand our depth of industry experience and market reach to travellers, operators and investors around the world.”

Knighthood Chairman James Hogan said his company’s investment provided an exciting opportunity to participate in development of more sustainable air travel. “Air taxis miss the mark,” he said. “Odys is developing sustainable VTOL aircraft to cut the travel time in half on busy travel corridors and create a new era of aviation untethered from runways and large airports.”

South Korean Advanced Air Mobility service provider MintAir recently signed a letter of intent to acquire 30 of the aircraft.

Image: Britten-Norman/CAeS

MONTE Aircraft Leasing, a UK-based lessor specialising in zero-emission regional fleets, has announced two new deals which could deliver up to 90 hybrid-electric or hydrogen-electric commuter planes for use by short-haul operators seeking to decarbonise. Through a partnership with US company Ampaire, MONTE will acquire up to 50 Eco Caravans, hybrid-electric upgrades of the Cessna Grand Caravan, which operates as both a passenger plane and a parcel freighter. The lessor has also signed a letter of intent with the UK’s Cranfield Aerospace Solutions to buy 40 modification kits to convert Britten-Norman Islander aircraft from fossil-fuelled piston engines to hydrogen-electric propulsion systems. The Ampaire and Cranfield announcements coincided with the maiden flight of Ampaire’s Eco Caravan prototype. They also extend MONTE’s growing portfolio of suppliers in the zero-emission aerospace sector and agreements with multiple operators to investigate green fleet or propulsion options for short-range flights.

The Ampaire agreement consists of 25 firm orders for Eco Caravans and options to acquire another 25, and is underpinned by a mutual preferred partner agreement, through which Ampaire will provide Eco Caravans to MONTE, and the lessor will become Ampaire’s financing partner for the type.

Compared to the conventionally-powered Cessna Grand Caravan, Ampaire says the Eco Caravan can cut fuel and emissions by up to 70% on shorter journeys and 50% on longer trips, and is “effectively carbon neutral” when also flown with sustainable aviation fuel. The Eco Caravan is also designed to deliver greater range without compromising payload and can recharge its batteries in flight, enabling it to serve any airport to which Caravans now fly, irrespective of ground charging infrastructure.

“MONTE is looking to build a fleet of low-emission and zero-emission aircraft to lease or finance for regional aircraft operators worldwide,” said Timothy Eyre, the company’s Investment Director.  “Ampaire has emerged as the leading hybrid-electric technology provider and its Eco Caravan will be very attractive for a segment of our operators. We are excited to have signed another key technology partnership and are looking forward to working with the Ampaire team to finance the Eco Caravan.”

The lessor has recently signed agreements to explore zero emission options and financing for customers including Cessna Caravan operators such as Costa Rica Green Airways.

Ampaire’s testbed Eco Caravan has just completed its first flight, powered by a fully-integrated hybrid-electric propulsion system. The nine-seat aircraft departed Camarillo Airport, north of Los Angeles, climbed at full power to 3,500 feet, and flew for 33 minutes using a combination of power from its combustion and electric engines.  

“The Eco Caravan is our starting point for a revolution in air travel,” said Ampaire CEO Kevin Noertker. “It brings cost per available seat mile down to the range of driving, benefiting operators and their passengers. It dramatically shrinks the aircraft’s carbon footprint. The propulsion technology is scalable and we intend to quickly move toward larger regional aircraft and even the single-aisle jet market over time.”

This month, MONTE signed an agreement with Indian regional flybig to provide financing and leasing solutions for the conversion of the airline’s fleet of DHC-6-400 and ATR aircraft to zero emission propulsion technologies. The lessor will also lease two DHC-6-400 aircraft to flybig. Announcing the airline’s #GoGreen initiative, Managing Director Sanjay Mandavia said: “This initiative will not only revolutionise air travel in India, but also reduce the cost of flying with flybig.”

MONTE has also signed a letter of intent with Cranfield Aerospace Solutions to buy 40 modification kits to retrofit twin-engine Britten-Norman Islander (BN2) aircraft to hydrogen-electric propulsion systems.

Through its ‘Project Fresson’ initiative, Cranfield is converting a nine-seat BN2 from fossil fuel to gaseous hydrogen, using a fuel cell and electric motor. The company’s initial aim is to achieve certification of the type for passenger service by 2026, and to offer the aircraft as a zero-emission option for short haul flights, with longer term plans to develop new-build 19-seat and 75-seat aircraft. 

MONTE will become Cranfield’s recommended financing partner for the converted BN2 aircraft, while Cranfield will become MONTE’s exclusive provider of the planes.

“We are excited to announce our partnership with Cranfield Aerospace Solutions which allows us to offer converted electric-hydrogen Britten-Norman Islander aircraft to regional turboprop operators,” said MONTE’s Eyre. “This partnership represents another important milestone on our journey to becoming carbon neutral by 2027.” 

Cranfield’s CEO, Paul Hutton, said: “We are delighted to be able to sign this deal with MONTE Aircraft Leasing, a company that we believe shares the same ambitions and values as us. It’s an extremely exciting time for Cranfield Aerospace Solutions as we continue to gain sales momentum in the market.”

The latest deals extend MONTE’s growing list of partnerships with suppliers including the hydrogen propulsion developer ZeroAvia and electric and hydrogen powertrain company Dovetail Electric Aviation. The lessor has ordered 100 ZA600 powertrains from ZeroAvia to convert conventionally-powered regional aircraft including the Cessna Caravan, Dornier 228 and DHC-6 Twin Otter, and another 50 conversion kits from newly-former Euro-Australian company Dovetail Electric Aviation to convert Cessna Caravans to hybrid-electric propulsion and Beech King Air aircraft to hydrogen-electric power.

Photo: MONTE is to explore the conversion of Costa Rica Green Airways’ fleet of Cessna 208B Grand Caravan EX aircraft to zero-emission propulsion

Regional and business aircraft maker Embraer has released details and images of four concept aircraft as starting points for all-new sustainably-powered passenger planes, reports Tony Harrington. Simultaneously, a new partnership has been formed in the UK to progress the conversion of existing Britten-Norman commuter planes from fossil fuels to zero-emission hydrogen propulsion. Embraer said its new Energia aircraft family would range from nine to 50 seats, fly between 200 and 500 nautical miles, or 370-926 kilometres, and be powered by four different, rear-mounted propulsion systems. The intention is to offer them progressively between 2030 and 2040, as technology becomes available. In contrast, Project Fresson, a collaboration between Britten-Norman and Cranfield Aerospace Solutions to retrofit existing regional aircraft with hydrogen fuel cell technology, has been broadened through a new partnership with Isles of Scilly Steamship Group, which owns UK regional airline Skybus, and wants to transition to zero-emission flights. Meanwhile, hydrogen-electric aviation pioneer ZeroAvia has announced a slew of new collaborations, including with Alaska Air Group.

“With 50 years’ experience in developing, certifying and supporting regional aircraft, Embraer is in a unique position to make viable the introduction of new, disruptive green technologies,” said Arjan Meijer, CEO of Embraer Commercial Aviation.

Luis Carlos Affonso, Embraer’s SVP Technology and Corporate Strategy, reported the Energia family of aircraft would provide an important platform for defining future low or no emission models. “We see our role as a developer of novel technologies to help the industry achieve its sustainability targets,” he said. “There’s no easy or single solution in getting to net zero. New technologies and their supporting infrastructure will come online over time. We’re working right now to refine the first airplane concepts, the ones that can start reducing emissions sooner rather than later. Small aircraft are ideal on which to test and prove new propulsion technologies so that they can be scaled up to larger aircraft.”

The first of the new concept craft, the nine-seat Energia Hybrid (E9-HE), would be offered from 2030. Embraer said this hybrid-electric aircraft, powered by two rear-mounted engines with front propellers, would emit 50% less CO2 when used with Jet A1 fuel, and 90% less when operated with sustainable aviation fuel. It would also produce 60% less external noise and have a flight range of 500nm, or 925km, and provide a sustainable option for short haul, low-capacity scheduled flights, corporate or charter operations, emergency services such as medivac, or parcel freight. 

Next, from 2035, would be the nine-seat Energia Electric (E9-FE), a fully-electric powered aircraft for short range flights of up to 200 nm, or 370 km. This model, the only high-wing aircraft of the Energia family, would produce no emissions and 80% less noise from its single, tail mounted engine, featuring dual contra-rotating propellers.

Also from 2035 would be Embraer’s 19-seat, hydrogen-electric Energia H2 Fuel Cell aircraft (E19-H2FC), designed to operate with hydrogen fuel cells as a single power source, or as a hybrid-powered plane with batteries or gas turbines.  Again, this aircraft, with two rear-mounted electric engines and front propellers, would have a range of 200nm/370 km, suitable for higher capacity short range flights. It would produce no carbon emissions, and 70% less external noise.

The fourth, final and largest model in the Energia family would be the zero emission Energia H2 gas turbine, dual-fuel airliner (E50-H2GT), powered by either hydrogen or sustainable aviation fuel, and with 2040 “technology readiness”. It would seat 35-50 passengers, have a range of 350-500nm, or 650-925km, and be 60% quieter than similar-size conventional aircraft.

Embraer is already well-advanced in its sustainability programmes, having tested drop-in sustainable aviation fuels including sugarcane and camelina plant-derived sources on the E-Jet family of regional airliners, and is aiming to make all of its new aircraft compatible with SAF by 2030. It has also test-flown an electric demonstrator aircraft, a single-engine EMB-203 Ipanema, 100% powered by electricity, and is planning to introduce a hydrogen fuel cell demonstrator by 2025. As well, the company is progressing an all-new turboprop aircraft, which would be both 100% SAF-compatible and designed to accommodate the integration of future hydrogen propulsion technologies. It is also developing a fully-electric vertical take-off or landing vehicle, or ‘air taxi’, to enter service in 2026.

The Energia family would be competing with all-new aircraft programmes, including the yet-to-fly 19-seat ES-19 of Swedish start-up Heart Aerospace. The ES-19 has attracted customers ranging from New Zealand regional airline Sounds Air to United Airlines, which, with regional partner Mesa, has announced plans to acquire up to 200 units. Last year, Airbus revealed its own family of concept aircraft through its ZEROe hydrogen power programme. Additionally, the Energia aircraft would be competing with a growing number of electric and hydrogen retrofit programmes for existing types, such as Britten-Norman aircraft.

Britten-Norman and Cranfield Aerospace Solutions are already collaborating on Project Fresson, a programme to integrate hydrogen fuel cell technology into an eight-seat Britten-Norman Islander aircraft, with a view to reinventing the type as a zero-emission commuter plane with higher passenger payload, lower maintenance costs and a faster path to market than an all-new aircraft. The two organisations have now entered a partnership with Isles of Scilly Steamship Group to progress the introduction of zero-emission flights, possibly by 2025, to the Isles, a popular UK tourist destination.

The Group’s fleet includes the eight-aircraft local airline, Skybus, which operates both eight-seat Britten-Norman Islander and 17-seat DH6 Twin Otters on three short-range routes. Chief Executive Stuart Reid said the company had signed a letter of intent for hydrogen-powered aircraft as part of a dual commitment to support both the destination’s environment and the UK government’s plans to decarbonise air transport.

William Hynett, Chief Executive of Britten-Norman, said: “We wish to bring hydrogen-electric aircraft to the market at the earliest possible opportunity so that we can help drive our customers’ success in the new age of air transport. In striving for a zero-carbon future, it is essential that solutions are practical, affordable and sustainable, and we believe that we are well-placed to help achieve these vital goals in a way that will resonate with our global customers, many of whom seek to protect the outstandingly beautiful places in which they operate.”

Last month, ZeroAvia and Alaska Air Group announced they were to collaborate on developing a hydrogen powertrain for a 76-seat, zero-emission regional aircraft. The partner’s engineers will work together to scale ZeroAvia’s existing powertrain platform to produce the ZA2000, an engine family capable of producing between 2,000 and 5,000 kilowatts of power with a 500-mile range. Initially, the technology will be deployed into a full-size De Havilland Q400 aircraft, previously operated by Alaska subsidiary Horizon Air Industries.

UK and US based ZeroAvia will also set up a location in the Seattle area to support the initiative and Alaska has secured options for up to 50 kits to begin converting its regional aircraft to hydrogen-electric power, starting with the Q400. Alaska has joined Seattle-based Amazon Climate Pledge Fund and Bill Gates’s Breakthrough Energy Ventures as investors in ZeroAvia.

US asset investment platform Rose Cay has also announced its support for the ZeroAvia technology and intends to fund the acquisition of existing aircraft, convert them using ZeroAvia’s hydrogen-electric powertrain system and then lease them to operators worldwide. The deal includes a conditional purchase order for up to 250 engines with deliveries beginning as early as 2024. The two partners said they also intend to develop airport infrastructure projects, with committed offtake agreements, to ensure hydrogen availability.

Earlier this month, ZeroAvia entered into a collaboration with Indian state-owned aerospace and defence company Hindustan Aeronautics (HAL) to develop a Supplemental Type Certificate (STC) to incorporate a 600kW hydrogen-electric powertrain system, the ZA600, into a 19-seat Dornier 228 aircraft. Around 270 Dornier 228 aircraft have been manufactured globally, with 242 currently in service, and the STC would allow retrofit of existing airframes for both Indian military and worldwide operators. HAL also intends to build new aircraft with additional FAA approval, designated Hindustan-228, creating the opportunity to incorporate ZA600 zero-emission engines.

A Dornier 228 based at ZeroAvia’s facility at Cotswold Airport in the UK is being used as the dedicated development platform for the HyFlyer II project, which is progressing the R&D required for the ZA600 powertrain for 19-seat aircraft. The company said it had recently successfully ground-tested the powertrain and reported flight testing using the Dornier 228 would begin “in the coming months to achieve certification and entry into commercial service in 2024”.

ZeroAvia recently held its two-day 2021 Hydrogen Aviation Summit, which can be viewed here.

Top image: Embraer’s Energia family of four concept aircraft

Bottom image: The Project Fresson Britten-Norman Islander aircraft