An Analysis of Fixed Wing-proprotor Interference for Folding Proprotor Aircraft

An Analysis of Fixed Wing-proprotor Interference for Folding Proprotor Aircraft

Author: Carl G. Matthys

Publisher:

Published: 1974

Total Pages: 322

ISBN-13:

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The report describes the development and implementation of an analysis of the mutual aerodynamic interference of the wing and the proprotor on a folding proprotor aircraft. The analysis was developed to complement and expand the capabilities of an existing AFFDL stability and control prediction method for helicopters and stoppable rotor aircraft. The wing-rotor interference section was added to the AFFDL program as an option to the user. This report is divided into four parts. The first part describes the formulation of a math model and its capabilities. The flight mode response of a typical folding proprotor aircraft during rotor feathering is discussed. The second part explains usage of a computer program implementing the math mode. Sample cases are presented as well as a description of the input and output formats. The third part contains a cross reference index of FORTRAN variables and subroutine names. The fourth part is a complete FORTRAN listing of the AFFDL program modified to include the interference subroutine.


Scientific and Technical Aerospace Reports

Scientific and Technical Aerospace Reports

Author:

Publisher:

Published: 1975

Total Pages: 970

ISBN-13:

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Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.


Helicopter Theory

Helicopter Theory

Author: Wayne Johnson

Publisher: Courier Corporation

Published: 1994-01-01

Total Pages: 1126

ISBN-13: 9780486682303

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The history of the helicopter may be traced back to the Chinese flying top (c. 400 BC) and to the work of Leonardo da Vinci, who sketched designs for a vertical flight machine utilizing a screw-type propeller. In the late 19th-century, Thomas Edison experimented with helicopter models, realizing that no such machine would be able to fly until the development of a sufficiently lightweight engine. When the internal combustion gasoline engine came on the scene around 1900, the stage was set for the real development of helicopter technology. While this text provides a concise history of helicopter development, its true purpose is to provide the engineering analysis required to design a highly successful rotorcraft. Toward that end the book offers thorough, comprehensive coverage of the theory of helicopter flight: the elements of vertical flight, forward flight, performance, design, mathematics of rotating systems, rotary wing dynamics and aerodynamics, aeroelasticity, stability and control, stall, noise and more. Wayne Johnson has worked for the U.S. Army and NASA at the Ames Research Center in California. Through his company Johnson Aeronautics, he is engaged in the development of software that is used throughout the world for the analysis of rotorcraft. In this book, Dr. Johnson has compiled a monumental resource that is essential reading for any student or aeronautical engineer interested in the design and development of vertical-flight aircraft.


Aeronautical Engineering

Aeronautical Engineering

Author:

Publisher:

Published: 1974

Total Pages: 548

ISBN-13:

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A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA).