An aerodynamic analysis of the autogiro rotor with a comparison between calculated and experimental results

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Description

This report presents an extension of the autogiro theory of Glauert and Lock in which the influence of a pitch varying with the blade radius is evaluated and methods of approximating the effect of blade tip losses and the influence of reversed velocities on the retreating blades are developed. A comparison of calculated and experimental results showed that most of the rotor characteristics could be calculated with reasonable accuracy, and that the type of induced flow assumed has a secondary effect upon the net rotor forces, although the flapping motion is influenced appreciably. An approximate evaluation of the effect of ... continued below

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Wheatley, John B 1934.

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This report is part of the collection entitled: National Advisory Committee for Aeronautics Collection and one other and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 180 times . More information about this report can be viewed below.

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  • Main Title: An aerodynamic analysis of the autogiro rotor with a comparison between calculated and experimental results
  • Series Title: NACA Technical Reports

Description

This report presents an extension of the autogiro theory of Glauert and Lock in which the influence of a pitch varying with the blade radius is evaluated and methods of approximating the effect of blade tip losses and the influence of reversed velocities on the retreating blades are developed. A comparison of calculated and experimental results showed that most of the rotor characteristics could be calculated with reasonable accuracy, and that the type of induced flow assumed has a secondary effect upon the net rotor forces, although the flapping motion is influenced appreciably. An approximate evaluation of the effect of parasite drag on the rotor blades established the importance of including this factor in the analysis.

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  • : 93R20851
  • URL: http://hdl.handle.net/2060/19930091561 External Link
  • Report No.: NACA-TR-487
  • Center for AeroSpace Information Number: 19930091561
  • Archival Resource Key: ark:/67531/metadc66144

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National Advisory Committee for Aeronautics Collection

The National Advisory Committee for Aeronautics (NACA) was a U.S. federal agency founded on March 3, 1915 to undertake, promote, and institutionalize aeronautical research. On October 1, 1958 the agency was dissolved, and its assets and personnel transferred to the newly created National Aeronautics and Space Administration (NASA).

Technical Report Archive and Image Library

This selection of materials from the Technical Report Archive and Image Library (TRAIL) includes hard-to-find reports published by various government agencies. The technical publications contain reports, images, and technical descriptions of research performed for U.S. government agencies. Topics range from mining, desalination, and radiation to broader physics, biology, and chemistry studies. Some reports include maps, foldouts, blueprints, and other oversize materials.

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Creation Date

  • 1934

Added to The UNT Digital Library

  • Nov. 17, 2011, 10:13 p.m.

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  • May 31, 2017, 1:54 p.m.

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Wheatley, John B. An aerodynamic analysis of the autogiro rotor with a comparison between calculated and experimental results, report, 1934; (digital.library.unt.edu/ark:/67531/metadc66144/: accessed June 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.