SerpApi.Org
The experimental Saab 340B aircraft surpassed 9,144 meters in altitude with a hybrid-electric propulsion system. GE Aerospace, NASA, BETA Technologies, and Boeing thus announce a demonstration at the usual altitude of commercial airliners.
The tested system combines a turboprop engine with high-power electrical equipment. On the right side of the Saab 340B, the engine, generators, power electronics, and propeller were modified. The conventional engine on the other side remained in place.
This hybrid architecture does not mean the aircraft operates solely on batteries. It uses an electrical source to assist propulsion and better manage certain flight phases. The goal of the tests is to evaluate the performance of a megawatt-class power system in real conditions.
The demonstrator comes from NASA's Electrified Powertrain Flight Demonstration program. The teams notably studied high-voltage operation, cooling, current conversions, and the integration of the system into a nacelle. These elements are as important as the engine itself.
These tests confirm flight capability, but are not yet sufficient to define precise gains for transport aircraft.
Consumption reduction will depend on many parameters, including equipment weight, batteries, the mission performed, and aircraft size. Safety, certification, and maintenance constraints will also need to be resolved before any commercial operation.
The collected data must now guide the design of electric propulsion systems. They could notably feed work on future engines for medium-range aircraft. For now, the Saab 340B remains a flying laboratory intended to test a still-developing technology.
