The Desaer ATL-100 (ATL being Portuguese for "light transport aircraft") is a twin-turboprop, high-wing, utility aircraft under development by Desaer in Brazil.
Desaer, a Brazilian aviation firm, launched the ATL 100 project in October 2018. It was registered in Brazil as a Strategic Defense Product. In 2020, Desaer announced a joint venture with CEIIA in Portugal to manufacture the turboprop. By 25 September 2020, a joint-venture between Brazilian Desaer and Portuguese engineering centre CEiiA was expected to create 1,200 jobs at a new integrated factory in Evora. The ATL-100 was to be developed over three years. The partnership with CEIIA was dissolved in 2021, with a clause forbidding CEIIA from launching a similar product until 2025.
By 2022, Desaer planned to start flying its ATL-100 prototype in 2023. In 2022, Desaer tapped MagniX to provide engines for its ATL-100H aircraft, a planned hybrid-electric version of its ATL-100 aircraft.
In early 2025, the ATL 100 was still under development, with an expected range of 1,600 km powered by two Pratt & Whitney PT-6 engines. In February 2025, Desaer accused EA Aircraft and Maintenance of appropriating technical information from the ATL 100 model for its LUS 222 aircraft.
The ATL-100 is a non-pressurized, twin-turboprop, high-wing utility aircraft with a fixed tricycle landing gear and an aft cargo ramp. With an MTOW up to , it should be certified under the part 23 commuter category for 19 passengers or three LD3 containers. It could operate on unpaved and short runways, with little or no ground support; it targets robustness and easy maintenance, and low operations costs. Quick-change variants could be offered for air ambulance, emergency evacuation, paratrooper or troop transport; and for patrol, surveillance, intelligence, reconnaissance.
The ATL-100H is a variant of the original that adds two outboard magniX magni350 electric motors to the configuration. Their role is to provide additional thrust, primarily for take-off and climbing. Each 111.5-kg (246-lb) motor offers 350-kW/1,610 Nm (1,188 ft lb) of maximum continuous torque. The company claimed that it would reduce fuel consumption by 25-40% and reduce take-off noise levels.