Analysis of Helicopter Maneuver-loads and Rotor-loads Flight-test Data
Analysis of Helicopter Maneuver-loads and Rotor-loads Flight-test Data

Author: Edward A. Beno

Publisher:

Published: 1973

Total Pages: 100

ISBN-13:

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A study was conducted in which available airload and blade response data for the NH-3A and CH-53A rotors were analyzed in an attempt to provide greater insight into the sources of rotor vibratory loads in both level and maneuvering flight. Primary emphasis in the study was placed on examining and understanding causes of high-frequency rotor control loads. Secondary objectives were: (1) to examine the effect of number of rotor blades on hub vibratory shear forces and (2) to assess which of the many terms appearing in the hub vibratory shear force expression were of most significance.

Rotary-Wing Aerodynamics
Rotary-Wing Aerodynamics

Author: W. Z. Stepniewski

Publisher: Courier Corporation

Published: 2013-04-22

Total Pages: 640

ISBN-13: 0486318516

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DIVClear, concise text covers aerodynamic phenomena of the rotor and offers guidelines for helicopter performance evaluation. Originally prepared for NASA. Prefaces. New Indexes. 10 black-and-white photos. 537 figures. /div

Putting the Aero Back Into Aeroelasticity
Putting the Aero Back Into Aeroelasticity

Author:

Publisher:

Published: 2000

Total Pages: 26

ISBN-13:

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The lack of progress in understanding the physics of rotorcraft loads and vibration over the last 30 years is addressed in this paper. As befits this extraordinarily difficult problem, the reasons for the lack of progress are complicated and difficult to ascertain. It is proposed here that the difficulty lies within at least three areas: 1) a loss of perspective as to what are the key factors in rotor loads and vibration, 2) the overlooking of serious unsolved problems in the field, and 3) cultural barriers that impede progress. Some criteria are suggested for future research to provide a more concentrated focus on the problem.