A study has been conducted to understand the interactional aerodynamics problems occurring during the UTTAS development. Powered wind tunnel model data were organized and analyzed in the following categories of interactions: Rotor/ground; Rotor/fuselage; Rotor/fuselage/ground; Rotor/empennage; and Rotor/empennage/ground. The following related problem areas are considered: Severe lateral trim changes during transition close to the ground; The occurrence of high vibratory aerodynamic loads on the airframe surfaces; Turbulent flow on the airframe near the ground; Excessive low-frequency unsteady loads on the empennage in forward flight due to the hub/rotor wake; and Poor efficiency in tail rotor installations due to adverse fin loading.
Interactional Aerodynamics of the Single-Rotor Helicopter Configuration. Volume I
1978
304 pages
Report
No indication
English
Aircraft , Aerodynamics , Helicopter rotors , Aerodynamic loading , Aerodynamic configurations , Helicopters , Interactions , Transport aircraft , Tactical aircraft , Utility aircraft , Wind tunnel tests , Ground effect , Vortices , Downwash , Wake , Hubs , Airframes , Fuselages , Tails(Aircraft) , H-61 aircraft , YUH-61A aircraft
Scaling and Configuration Effects on Helicopter Rotor Hub Interactional Aerodynamics
Online Contents | 2017
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