Zero-emission aviation powertrain developer ZeroAvia (earlier post) and De Havilland Aircraft of Canada Limited have entered into a Memorandum of Understanding (MOU) to develop a line-fit and retrofit program for De Havilland Canada’s aircraft models, using hydrogen-electric propulsion in both new and in-service aircraft.

As part of the MOU, De Havilland Canada will be issued options to purchase 50 ZeroAvia hydrogen-electric engines. These options will be confirmed once a definitive agreement has been completed between De Havilland Canada and ZeroAvia.

The companies intend to work together on a service bulletin for the Dash 8-400 type certificate offering ZeroAvia’s hydrogen-electric engine as a line-fit option for new aircraft, as well as developing an OEM-approved retrofit program for in-service aircraft.

This program will target the use of ZeroAvia’s 2MW+ powertrain (ZA2000) for Dash 8-400 aircraft. The Dash 8-400 is one of the world’s most reliable turboprop aircraft with more than 625 delivered to customers. The global fleet of Dash 8-400 aircraft has logged more than 11 million flight hours and transported more than 550 million passengers.

As part of the program, ZeroAvia will develop a flight demonstrator, with De Havilland Canada’s support, using a Dash 8-400 aircraft to aid certification and showcase the operational and commercial potential of the engine. The intention is to identify a suitable existing route utilising the aircraft and aim for entry into service within the next five years.

ZeroAvia and De Havilland Canada intend to jointly market aircraft powered by the hydrogen-electric engines to operators with power-by-the-hour (PBH) support.

In October, ZeroAvia announced a development collaboration with Alaska Air Group, the parent company of Alaska Airlines, for a hydrogen-electric powertrain capable of flying 76-seat regional aircraft in excess of 500 nautical miles, starting with initial deployment into a full-size Dash 8-400 aircraft.

ZeroAvia expects to fly a 19-seat aircraft using its ZA600 powertrain in the coming weeks in a hybrid configuration (one conventional engine, one hydrogen-electric) before flying the same aircraft using only hydrogen-electric engines in 2022 and building to certification by 2024.

On its ZA2000 program, ZeroAvia aims to have full thrust ground demonstrations of its 1.8MW engine variant by the end of 2022. From there, the company plans certification of its ZA2000 powertrain to support 40-80 seat aircraft with a potential range in excess of 700 nautical miles—about the distance from Toronto to Atlanta—by 2026, and eventually extending into aircraft up to 90 seats by 2027.