Spoorthi Singh, Aravind Karthik Muralidharan, Jayakrishnan Radhakrishnan, Mohammad Zuber, Adi Azriff Basri, Norkhairunnisa Mazlan, Mohd Nizar Hamidon and Kamarul Arifin Ahmad 2023. Study of X-Pattern Crank-Activated 4-Bar Fast Return Mechanism for Flapping Actuation in Robo Drones. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences. 105, 2 (Jun. 2023), 115–128. DOI:https://doi.org/10.37934/arfmts.105.2.115128.