September 2018, a electric motor with a propeller had been tested on a Cessna iron bird. The Caravan was expected to fly by the fall of 2019 and by 2022 MagniX estimates electric aircraft will have ranges of by 2024. The motor ran on a test dynamometer for 1,000 hours. The iron bird is a Caravan forward fuselage used as a test bed, with the original Pratt & Whitney Canada PT6 turboprop engine replaced by an electric motor, inverter and a liquid-cooling system, including radiators, driving a Cessna 206 propeller. The production motor will produce at 1,900 rpm, down from the test motor's 2,500 rpm, allowing the installation without a reduction gearbox. On 28 May 2020, the MagniX electric-powered nine-passenger Cessna 208B eCaravan flew on electric power, towards commercial operation certification. A 560-kW (750-hp) MagniX electric motor was installed in a de Havilland Canada DHC-2 Beaver seaplane. Harbour Air, based in British Columbia, was hoping to introduce the aircraft in commercial service in 2021, for trips under 30 minutes initially, until range increases as better batteries are introduced. On December 10, 2019, it made its first flight of four minutes duration from the Fraser River near Vancouver. The normally-fitted Pratt & Whitney R-985 Wasp Junior piston engine of the six-passenger Beaver was replaced by a 135 kg (297 lb) magni500, with swappable batteries, allowing 30 minute flights with a 30-minute reserve. By April 2022, flight testing of a certifiable version through a STC was delayed until late 2023, to carry four passengers and a pilot on 30 minute flights with a 30 minute reserve. Magnix is seeking FAA certification for its 640 kW (850shp) Magni650 aircraft engine, while battery provider H55 (a spin-off from Solar Impulse) is pursuing EASA approval. A demonstrator for the German Scylax E10 10-seater should fly in 2022. It should be used by FLN Frisia Luftverkehr to connect East Frisian islands with its range and 300 m (980 ft) short takeoff and landing distance. On 23 September 2020, Gothenburg-based Heart Aerospace presented its ES-19 design, a 19-seat all-electric commercial aircraft planned to fly by mid-2026. With a conventional aluminium airframe and wing, its planned range is 400 km (222 nmi) and expects to operate from runways as short as 800 m (2,640 ft). Initially targeting airlines operating in the Nordic countries, Heart has received "expressions of interest" for 147 ES-19 aircraft worth about €1.1 billion or