Unable to log in or get member pricing? Having trouble changing your password?

Please review our Frequently Asked Questions for complete information on these and other common situations.

Abstract
A numerical study was conducted to characterize the influence on vehicle performance and controlability due to partially overlapped rotors. Partially overlapping rotors on a quad-rotor configuration is as an approach to mitgate the influence of geometric constraints on the vehicle design. A comprehensive analysis model of a pair of 3 bladed overlapped rotors with 0.66D shaft separation was assessed using a free vortex wake and the results were compared to published experimental data. A full quad-rotor vehicle analysis model was constructed to trim the vehicle and characterize the flight performance and controlability in steady forward flight, coordinated turns, pedal turns, sideward flight, and to determine sensitivity to variation in center of gravity during coordinated turns. The finite state interference model used for vehicle trim was con?gured based upon the results from the comprehensive analysis assessment. In the steady flight maneuvers assessed, the rotors behaved similarly in pairs of with the upper rotors carrying up to 12% more load in forward ?ight than the lower pair of rotors. Small magnitude reductions in power consumption were realized for turns and center of gravity shifts dependent upon turn direction. Increasing the vehicle gross weight exacerbates the separation in rotor speeds between the upper and lower pairs during manuevers. Aerodynamic rotor-on-rotor interference introduces a coupling of opposite spinning rotors, but the reduction lateral rotor separation had a greater impact on controlability.

Recently Viewed Items

• 

  Performance and Controlability Assessment of an Overlapping Quad-Rotor Concept

  Member Price :

  $15.00

  Your Price :

  $30.00

Popular Products