1. Acoustic and Performance Analysis of Counter-Rotating Co-Axial Toroidal Rotors Open Access Author: Robertson, Noah Title: Acoustic and Performance Analysis of Counter-Rotating Co-Axial Toroidal Rotors Area of Honors: Aerospace Engineering Keywords: AeroacousticsPropellersPerformanceToroidal File: Download Toroidal_Blades_Honors_Thesis.pdf Thesis Supervisors: Jose Palacios, Thesis SupervisorKenneth Steven Brentner, Thesis Honors Advisor