Comparison of Calculated and Measured Stall Boundaries of a Helicopter Rotor at Advance Ratios from 0.3 to 0.4
Title | Comparison of Calculated and Measured Stall Boundaries of a Helicopter Rotor at Advance Ratios from 0.3 to 0.4 PDF eBook |
Author | John L. McCloud |
Publisher | |
Pages | 32 |
Release | 1959 |
Genre | Torque |
ISBN |
Scientific and Technical Aerospace Reports
Title | Scientific and Technical Aerospace Reports PDF eBook |
Author | |
Publisher | |
Pages | 704 |
Release | 1995 |
Genre | Aeronautics |
ISBN |
Comparison of Calculated and Measured Helicopter Rotor Lateral Flapping Angles
Title | Comparison of Calculated and Measured Helicopter Rotor Lateral Flapping Angles PDF eBook |
Author | |
Publisher | |
Pages | 62 |
Release | 1980 |
Genre | |
ISBN |
Correlation of Airloads on a Two-bladed Helicopter Rotor
Title | Correlation of Airloads on a Two-bladed Helicopter Rotor PDF eBook |
Author | Francisco J. Fernandez |
Publisher | |
Pages | 32 |
Release | 1993 |
Genre | Rotors (Helicopters) |
ISBN |
Index of NASA Technical Publications
Title | Index of NASA Technical Publications PDF eBook |
Author | United States. National Aeronautics and Space Administration |
Publisher | |
Pages | 448 |
Release | 1960 |
Genre | Aeronautics |
ISBN |
A Selected Listing of NASA Scientific and Technical Reports for ...
Title | A Selected Listing of NASA Scientific and Technical Reports for ... PDF eBook |
Author | |
Publisher | |
Pages | 450 |
Release | 1960 |
Genre | Aeronautics |
ISBN |
Comparison of Calculated and Measured Helicopter Rotor Lateral Flapping Angles
Title | Comparison of Calculated and Measured Helicopter Rotor Lateral Flapping Angles PDF eBook |
Author | National Aeronautics and Space Administration (NASA) |
Publisher | Createspace Independent Publishing Platform |
Pages | 26 |
Release | 2018-07-21 |
Genre | |
ISBN | 9781723387166 |
Calculated and measured values of helicopter rotor flapping angles in forward flight are compared for a model rotor in a wind tunnel and an autogiro in gliding flight. The lateral flapping angles can be accurately predicted when a calculation of the nonuniform wake-induced velocity is used. At low advance ratios, it is also necessary to use a free wake geometry calculation. For the cases considered, the tip vortices in the rotor wake remain very close to the tip-path plane, so the calculated values of the flapping motion are sensitive to the fine details of the wake structure, specifically the viscous core radius of the tip vortices. Johnson, W. Ames Research Center NASA-TM-81213, AVRADCOM-TR-80-A-11, A-8239 RTOP 505-42-21