EULOSAM II - Design of remotely controlled HTP successfully completed

EULOSAM II (European LOw Speed Aircraft Model II) is an European Clean Sky 2 co-funded research project, the follow-up project of EULOSAM, focusing on the design upgrade and manufacturing completion of a half-aircraft WT model for high-Re tests.

Within this project, IBK just completed the design of the cross-shaped tail plane with actuated HTP trimming. Indeed, the design has been accepted by the industrial partner Dassault Aviation (Topic Manager) on 27th of February 2020.

The design was very challenging as these moved parts need to be sealed to the inside of the model in all positions. The expected load, however, did not allow a circular hinge line, so an elliptical one had to be used. The design had to deal with very high forces (a gear ratio of more than 1:100 was necessary) along with high requirements on the backlash. The model is also equipped with several fallback solutions for a failure of the self-blocking mechanism up to a complete failure of the actuated mechanism.

In March 2020 this tail plane design and production was finished. After model assembly, the manual fallback solutions (remote control by-passed) has been tested with and without simulated aerodynamic loads outside the wind tunnel. The mechanism is fully compliant with the requirements.

After the completion of all the tests on the full remotely controlled HTP mechanism, postponed due to COVID-19 restrictions, the model will then be ready for wind tunnel testing.

Partners in the EULOSAM II project are 3 SME: NHOE (coordinator, clash and FE analysis of wing modified parts, innovative movable by Additive Manufacturing), ILM (model manufacturing, instrumentation and assembly) and IBK-Innovation (design and analysis of the remotely actuated HTP).

This project has received funding from the Clean Sky 2 Joint Undertaking under the European Union’s Horizon 2020 research and innovation programme under grant agreement No 821020.