The Clean Sky GRA programs ESICAPIA (Experimental Subsonic Investigation of a Complete Aircraft Propulsion system Installation and Architecture power plant optimisation) and LOSITA (LOw Subsonic Investigation of a large complete Turboprop Aircraft) projects aim to optimise the configuration, performance and alternative propulsion systems on two different experimental regional aircraft. RUAG Aviation is a member of two international consortia led by IBK Innovation of Germany, which were commissioned to develop models of the two GRA configurations and investigate their performance in tests at the RUAG Large Wind Tunnel in Emmen (LWTE). One model was equipped with propellers while the other featured a simulation of a modern turbofan system. Both systems were developed in-house by the RUAG Aviation department of aerodynamics.
“Simulations using propellers are standard for testing in the large wind tunnel,” says Andreas Hauser, Manager Department of Aerodynamics, RUAG Aviation. “However, the turbofan simulators developed for the ESICAPIA model were a first in our facility. The challenges this presented were an opportunity for the aerodynamics team to demonstrate their expertise and their reputation for finding innovative solutions.”
The RUAG engineers developed the power simulation systems building on existing RUAG hydraulic engine technology and know-how, and integrated them into the Green Regional Aircraft wind tunnel models. During subsequent wind tunnel testing, the propulsors performed sound. The Green Regional Aircraft model tests proved a complete success and generated a valuable aerodynamic database, including power effects and acoustic data. The experience gained from developing the turbofan simulator for ESICAPIA is already supporting the development of a new, smaller and higher performance turbofan simulator. Also, the RUAG wind tunnel testing portfolio has been expanded, adding new capabilities to the benefit of customers.
“Ultimately, this type of research brings benefits to everyone – in the form of a cleaner environment and a sustainable future for aviation,” says Andreas Hauser.
These projects have received funding from the European Union's Horizon 2020 research and innovation program under grant agreement No 325954 and 620108
RUAG Aviation is a leading supplier, support provider and integrator of systems and components for civil and military aviation worldwide.
Servicing aircraft and helicopters throughout their entire life cycle, the company’s core competencies include maintenance, repair and overhaul services, upgrades, and the development, manufacturing and integration of subsystems.
RUAG is an authorised service centre for OEMs of renown, such as Airbus Helicopters, Bell, Bombardier, Cirrus, Cessna, Diamond, Dassault Aviation, Embraer, Leonardo, Piaggio, Sikorsky, Piper, and Mooney, as well as a service centre for 328 Support Services, Hawker Beechcraft, Viking und MD Helicopters. RUAG Aviation is also a partner to the Swiss Armed Forces and other international air forces.
The company is also the manufacturer (OEM) of the Dornier 228, a versatile aircraft for challenging special missions and passenger and cargo operations.
RUAG Aviation is an approved Part 21/J EASA Design Organisation, Part 21/G EASA Production Organisation, and Part 145 EASA Maintenance Organisation.