Publications

Version: 1.0 Approved

LDO-ID 2022PUB00064

Title NGCTR-TD Tilt-Rotor Autorotation Numerical Investigation

Abstract

Within the Clean Sky 2 Fast Rotorcraft platform, a Next Generation Civil Tilt-Rotor Technology Demonstrator (NGCTR-TD) is under development. The design phase has been successfully completed and first flight phase is planned within 2023. As part of design verification, typical safe procedures are investigated, with dedicated analysis planned in order to improve the transport category performance requirements, as verified for Legacy tilt-rotor platform. Such procedure consists in 4 different steps when starting from AP mode, and the analysis are focused on VTOL steady autorotation phase, being the one where tilt-rotor configuration shows higher peculiarity with respect to helicopter configuration, due to the presence of lifting surfaces. As first, preliminary considerations from helicopter theory are cited, and tilt-rotor peculiarities listed. Then, adopting the developed FlightLab numerical model, different solutions are investigated, starting from characterization in airspeed for a baseline configuration. Different sensitivity analyses are conducted to map the major effect for the specific topic, and best trade-off autorotation configuration/control strategy is obtained for NGCTR-TD. Such solution is investigated in the complete Weight/CG envelope to ensure control strategy robustness

Authors Giuliani, Valentina; Ragazzi, Andrea; Riccardi, Fabio; Prando, Giuliano; Del Grande, Federico; Pecoraro, Matteo

Type Paper for Seminar/Symposium/Conference

Media Vertical Flight Society - Annual Forum & Technology Display (10-12 May 2022, Fort Worth, TX, USA)

Web site

https://vtol.org/annual-forum/forum-78-proceedings?paperSort=techSession#Handling%20Qualities%20II

Anno 2022