The project proposal is aimed in category of Business Aviation/Short Range turboprop engines. The baseline core of ARDIDEN3 will be improved with focus, first of all upon combustion chamber for higher altitude operation, specific turbine and propulsive exhaust and specific control system. This way it will better fit with turboprop application. For this purpose the ARDIDEN3 core will be integrated with an innovative gear box, air inlet and advanced more electric propeller control system. Objective of the project proposal is to research, design, manufacture test and verify a new advanced, more electric propeller control system consisting of Propeller Control Unit, Overspeed Governor and Auxiliary Oil Pump, useful for operational conditions of the improved Turboprop engine developed by Turbomeca. The objective will be achieved by the following steps: 1. Definition of propeller control system design specifications with respect to the increased level of power influences due to the specific characteristic of the improved Turboprop engine. 2. Design of the Propeller Control Unit, Overspeed Governor and Auxiliary Oil Pump. 3. Production of the Propeller Control System equipment. 4. Testing of the Propeller Control Unit, Overspeed Governor and Auxiliary Oil Pump within internal testing procedures, and validation within environmental external testing and verification directly on the Turboprop engine demonstrator, in order to demonstrate the achievements. Based on the dynamic modeling, research and verification the new technical specifications will be established. Based on them a suitable, advanced more electric propeller control system will be designed, produced and tested. JIHOSTROJ is a company experienced and approved for design and production of propeller governors. VZLU is a research and testing establishment with more than 90 years of experience and tradition in aerospace activities.

Riveting is the defacto method for the assembly of aluminium aerostructures, with large commercial aircraft fuselages typically containing 100’000s of rivets. However, riveting is known as a time-consuming, expensive and weight-adding operation. From a design perspective, it also places holes and point loads in a cyclically pressurised structure, subject to long-term fatigue loading and corrosion. Thus is not an ideal solution for these types of structures. With developments in precision laser beam welding (LBW) and friction stir welding (FSW), it is now possible to fabricate “rivetless” aluminium aerostructures using welding processes. These new processes produce a lighter weight, distributed load path with the potential for enhanced strength and structural stiffness, ‘no holes’ and a smoother (more aerodynamic) surface. In addition to being more structurally efficient, the new processes are cheaper and reduce inspection & maintenance requirements. The OASIS project will establish and demonstrate the cost-effectiveness of manufacturing aluminium aircraft structures using the latest developments in LBW and FSW (with appropriate inspection to aerospace standards). The project is led by TWI, who are leaders in both LBW and FSW techniques. Together with 6 other European organisations, we will design, demonstrate and evaluate the suitability of a range of process variants in creating optimised aluminium aircraft structures, including appropriateness for emerging alloys (e.g. 3rd generation Al-Li, 2nd gen Scalmalloy®). ESAB who will offer a commercial route for adoption of suitable processes; as suppliers of both LBW and FSW solutions to the European aerospace supply-chain (and who hold unique FSW IP). The impact of OASIS will ultimately allow improved design and manufacture of lighter-weight aluminium aircraft structures. This will contribute to the flightpath 2050 goals of reduced fuel burn, superior operating efficiencies and reduced emissions.