Vehicles with coaxial, contra-rotating rotor systems (CACR) are being considered for a
range of applications. Design parameters are identified that effect the fundamental …

This study is conducted to investigate the aerodynamic characteristics of a coaxial rotor in
low-speed forward flight using a high-fidelity computational fluid dynamics (CFD) solver …

Coaxial rotor helicopters are a candidate for the next generation of rotorcraft due to their
ability to achieve high speeds without compromising hover performance. Coaxial rotors are …

The blade crossing event of a coaxial counter-rotating rotor is a potential source of noise
and impulsive blade loads. Blade crossings occur many times during each rotor revolution …

Vr/R= velocity at r/R spanwise location (m/s) Vtip= rotor blade rotational speed at tip (m/s)
V∞= forward flight velocity (m/s) α= airfoil angle-of-attack (deg), positive pitch up Γ= vortex …