The skies over the Hawaiian Islands are hosting an historic test of a hybrid electric aircraft along an actual airline route. Ampaire, an electric aviation firm, is flying its Electric EEL aircraft from Kahului to Hana and back again, the 20-minute journey over the island of Maui powered by a single electric charge.

First flown on Nov. 22, the Electric EEL is now making the trip regularly in a month-long demonstration program with Mokulule Airlines, one of 15 airlines worldwide with which Ampaire is working.

The flight trials are the first for hybrid electric aircraft under the Experimental Market Survey category of Federal Aviation Administration (FAA) regulations. The category allows Ampaire to fly with their crew and essential personnel for crew training and other exploratory market activity.

The project is supported by Elemental Excelerator, a global climate-tech accelerator.

“We’re following the successful path of hybrid-electric automobiles in transforming ground transportation by taking that model to the sky,” said Ampaire CEO Kevin Noertker. “By upgrading current aircraft with hybrid-electric propulsion we can enter the market quickly and take advantage of existing infrastructure for fixed-wing aviation.”

Noertker explained that the flight trials serve two purposes: demonstrating electric aviation’s potential to reduce harmful emissions, and evaluating the robustness of Ampaire technology.

“We can take lessons from this series of flights and apply them to subsequent, larger aircraft designs already in the works,” he saiod.

Ampaire founder and CEO Kevin Noertker. Photo courtesy of Ampaire.

The Electric EEL technology demonstrator used in the Mokulele trials is an upgrade of the popular six-seat Cessna 337 twin-engine piston aircraft. The aircraft has a 300-horsepower piston engine in the rear and 160 kW-capable electric power unit in front, plus a battery pack carried in an under-fuselage aero-optimized shell. Due to the contribution of the electric power unit, fuel consumption and CO2 emissions are reduced approximately 40-50 percent. 

For the flight trials, the only change to ground equipment was the requirement to wire a Mokulele hangar with a 208-volt 3-phase outlet. Ampaire has been working with the Hawaii Department of Transportation and the Hawaiian Electric Company to explore longer-term infrastructure solutions to support a fleet of hybrid- or fully-electric aircraft.

Justin Gillen
Ampaire test pilot Justin Gillen “fueling” the Electric EEL aircraft with electrons. Photo courtesy of Ampaire.

“The future for regional airlines is electric,” said Stan Little, CEO of Southern Airways which operates one of the largest commuter airlines in the U.S. and owns Mokulele Airlines. “We expect to put hybrid- and all-electric designs into service as soon as possible, and we know other regionals are watching us with great interest.”

“We’re excited to partner with Ampaire to pave a path to electric aviation that unlocks more accessibility to rural and island communities and increases green jobs while invigorating the aviation industry,” says Danielle J. Harris, director of mobility innovation at Elemental Excelerator. “Building a climate-positive aviation industry is about much more than just a plane. It requires rethinking everything from airport infrastructure to pilot behavior, and that’s what this project is really proving.”

“The market for electric aircraft will expand as airlines perceive that electric aviation is not only environmentally desirable, but economically advantageous,” said Noertker. “Electricity cost is an order of magnitude less expensive in comparison to fuel, which is the largest cost item for airlines.”

“Ampaire is focused on the regional market where we can provide viable range for typical routes,” he said. “The average regional airline route in the U.S. is less than 500 miles. Upgrading today’s aircraft for electric power is a relatively low-cost, low-risk path to aircraft certification. Then we expect to move on to increasingly efficient and capable clean-sheet designs.”

UBS, the Swiss investment bank, forecasts a $178 billion market for hybrid-electric aircraft.

This article was embargoed until 2:00 a.m. EST on Wednesday, December 9, 2020.

About Ampaire 

Ampaire is leading the charge in aircraft electrification. The Los Angeles-based company’s mission is to be the world’s most trusted developer of practical and compelling electric aircraft. Ampaire flew the largest hybrid electric aircraft at the time in May 2019 and is exploring larger aircraft conversions with support from NASA and the US Department of Energy’s ARPA-E research arm.  Ampaire’s vision is to make flights more accessible to more people from more airports by providing electric aircraft that are clean, quiet, and affordable. Ampaire is a portfolio company of Elemental Excelerator, the Los Angeles Cleantech Incubator, and Techstars, with additional support from Starburst Accelerator and others. For more Information, visit ampaire.com.

About Elemental Excelerator

Elemental Excelerator advances solutions to climate change and deploys them in the communities that need them the most. Each year, it finds 15-20 companies that best fit its mission and funds each company up to $1 million to improve systems in energy, mobility, water, and agriculture that impact people’s lives. To date, it has awarded over $40 million to 117 companies, and 70 demonstration projects.  For more information, please visit elementalexcelerator.com.

About Southern Airways and Mokulele Airlines

Founded in 2013, Southern Airways is now one of the largest commuter airlines in the United States.  Operating a fleet of Cessna Caravans and Grand Caravans, Southern, along with its Hawaiian subsidiary, Mokulele Airlines, serves 37 cities with more than 220 peak-day departures from hubs at Baltimore, Dallas/Ft. Worth, Honolulu, Kahului, Los Angeles, Memphis, Nantucket, Palm Beach, and Pittsburgh.  In Hawai‘i, Mokulele serves more airports with more flights than any other airline.  For further information, go to www.iFlySouthern.com, or visit us on all major social media sites.

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