# Ampaire hybrid-electric aircraft development > Live situation record from CLSTR: https://clstr.news/situations/ampaire-hybrid-electric-aircraft-development > Updated: 2026-08-19T14:35:51.000Z. Sources: 2. Developments: 2. Ampaire, a California-based aviation startup, is advancing hybrid-electric propulsion technology through flight testing and capital acquisition. In early August 2026, Ampaire and the Utah Department of Transportation conducted demonstration flights using the Ampaire EEL, a hybrid-electric Cessna 337 Skymaster testbed. These flights, part of the Federal Aviation Administration’s eVTOL Integration Pilot Program and Utah’s uFLY initiative, included a 240-mile trip from Salt Lake City to Cedar City on a single battery charge. The data collected is intended to assist the FAA in refining airspace integration procedures. Following these tests, Ampaire secured $19 million in Series B funding, led by DiamondStream Partners with participation from Alaska Airlines and IAGi Ventures. The company plans to use the investment to accelerate the commercial readiness of its AMP-H570 propulsion system. This technology will be used to retrofit Cessna Grand Caravan aircraft into the ‘Eco Caravan,’ which aims to reduce fuel consumption by 50%, and to develop hybrid-electric applications for Auxiliary Power Units (APUs). ## Timeline ### 2026-08-19: Ampaire raises $19M in Series B funding for hybrid-electric aircraft California startup Ampaire has raised $19 million in Series B funding, led by DiamondStream Partners with support from IAG and Alaska Airlines, to advance hybrid-electric aircraft and propulsion systems. 2 sources. https://clstr.news/cluster/ampaire-raises-19m-in-series-b-funding-for-hybrid-electric-aircraft ### 2026-08-06: Ampaire hybrid‑electric aircraft completes test flight in Utah Ampaire and Utah DOT flew a hybrid‑electric aircraft from Salt Lake City to Cedar City, part of the FAA eVTOL pilot program and Utah’s uFLY initiative, to test advanced air‑mobility. 2 sources. https://clstr.news/cluster/ampaire-hybridelectric-aircraft-completes-test-flight-in-utah --- Cite as: Ampaire hybrid-electric aircraft development. CLSTR, https://clstr.news/situations/ampaire-hybrid-electric-aircraft-development