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Ampaire
Ampaire has flown hybrid-electric aircraft over 30,000 miles, targeting 90% fuel reduction with its AmpDrive retrofit system.
Ampaire
Ampaire develops hybrid-electric propulsion systems designed to retrofit existing aircraft, starting with the Cessna 337 Skymaster and expanding to regional turboprops. The company’s stated objectives — 90% lower fuel consumption, 50% lower maintenance costs, and 60% less noise — aim to make currently uneconomical short-haul routes viable, particularly in underserved communities. Its work is backed by a series of public-private collaborations with NASA, the US Air Force, and the Department of Energy’s ARPA-E office. The firm’s technical strategy is incremental, using real flight data from each aircraft iteration to inform the next. Over 30,000 miles of testing have accumulated across its hybrid-electric fleet, which Ampaire claims as an industry-leading figure. A notable commercial foothold is its partnership with Mokulele Airlines, a scheduled passenger carrier in Hawaii, signaling intent to move from experimental flight to revenue service. The company was recognized as a Global Cleantech 100 company in 2019 and won an Edison Award for Aeronautical Innovation in 2021, part of a field of 1,400 applicants. Ampaire’s client and partner ecosystem includes Norway’s state-owned airport operator Avinor, which engaged the company for a carbon-reduction program, and California-based climate accelerator Elemental Excelerator. The firm publicly categorizes its technology stack to cover hybrid-electric, all-electric, and hydrogen powertrains, while its current flight operations are focused exclusively on hybrid-electric configurations. A Gold Edison Award for Flight Technologies in 2021 placed Ampaire among 1,400 global applicants for that cycle. Structurally, Ampaire is distinguished not by a novel business model but by its focus on retrofitting the world’s most common airframes rather than designing clean-sheet aircraft. That architecture decision defines its certification path and market timeline relative to competitors. The entire proposition — lower operating costs, faster deployment, and a building-block safety record — is built on the assumption that regulators will certify hybrid-electric powertrain modifications for existing certified aircraft, a process that remains a key technical and legal gating item.
General information
Firm type
other
Year founded
—
AUM
Undisclosed
Location
Region
North America
Country
United States
City
—
Corporate office
—
Sector focus
Frequently asked questions
How does Ampaire's hybrid-electric system reduce fuel consumption?
Ampaire’s AmpDrive system pairs a conventional internal combustion engine with an electric motor and battery pack, optimizing the combined power output for different phases of flight. The company claims this architecture can cut fuel consumption by up to 90%, primarily by drawing on electric power during taxi, takeoff, and climb, when traditional engines are least efficient. Maintenance costs are said to drop by roughly half because the combustion engine operates fewer hours and at steadier loads.
Which aircraft is Ampaire currently flying?
Ampaire’s testbed program is built around the Cessna 337 Skymaster, a twin-engine push-pull aircraft that allows for straightforward comparison between a conventional rear engine and an electric forward engine. The company has publicly committed to scaling its technology onto regional turboprops, which represent the bulk of short-haul commercial routes. As of its latest disclosed figures, the fleet has accumulated over 30,000 flight miles.
Who are Ampaire's commercial partners?
Mokulele Airlines, a Hawaii-based scheduled carrier, is Ampaire’s most prominent commercial partner and a potential early operator of its hybrid-electric aircraft on inter-island routes. Avinor, the state-owned operator of Norway’s airports, has worked with Ampaire on a carbon-reduction program. The company is also a portfolio member of Elemental Excelerator, a climate-tech accelerator.
Is Ampaire a single family office or an operating company?
Ampaire is an operating company — a venture-backed developer of electric aircraft propulsion, not a family office or investment manager. Its capital goes into research, certification, and flight testing, not external investment portfolios.
What is Ampaire's regulatory pathway to commercial operation?
Ampaire is pursuing a supplemental type certificate (STC) for its AmpDrive modification, meaning it must demonstrate to regulators that its hybrid-electric powertrain is safe and reliable on an already-certified airframe. This contrasts with clean-sheet electric aircraft developers that face a longer full type-certification process. The exact FAA or EASA filing status and expected certification date have not been publicly disclosed.
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