Downwash airflow distribution pattern of hexa-copter unmanned aerial vehicles. - Yallappa, Dengeru; Kavitha, Ramasamy; Surendrakumar, Allimuthu; Balaji, Kannan; Suthakar, Balakrishnan; Mohan Kumar, Ayyasamy Paramasivam; Ravi, Yathendranaik; Ashoka, Narayananaik; Kavan, Kumar (International Journal of Agricultural & Biological Engineering, 2024)