Extraction of Longitudinal Aerodynamic Coefficients from Forward-flight Conditions of a Tilt Wing V/STOL Airplane PDF Download
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Author: James L. Williams
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 36
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Book Description
A parameter-estimation algorithm was used to extract the longitudinal aerodynamic derivatives from flight data for the XC-142A airplane in a cruise condition. The flight data were the response to a tail-plane doublet input. Results of this study showed that a set of derivatives were determined which yielded a calculated aircraft response in close agreement with the measured response. This calculated response was in much closer agreement with the flight data than the response obtained by using derivatives which were calculated from empirical methods. There were large differences between some of the important derivatives extracted from flight data and those calculated from empirical methods. The reasons for these differences were not identified.
Author: James L. Williams
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 36
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Book Description
A parameter-estimation algorithm was used to extract the longitudinal aerodynamic derivatives from flight data for the XC-142A airplane in a cruise condition. The flight data were the response to a tail-plane doublet input. Results of this study showed that a set of derivatives were determined which yielded a calculated aircraft response in close agreement with the measured response. This calculated response was in much closer agreement with the flight data than the response obtained by using derivatives which were calculated from empirical methods. There were large differences between some of the important derivatives extracted from flight data and those calculated from empirical methods. The reasons for these differences were not identified.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 936
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Author: James LaVern Williams
Publisher:
ISBN:
Category : Aerodynamics, Transonic
Languages : en
Pages : 28
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Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1388
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Author: United States. Superintendent of Documents
Publisher:
ISBN:
Category : United States
Languages : en
Pages : 1466
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Author: James L. Williams
Publisher:
ISBN:
Category :
Languages : en
Pages : 50
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Book Description
Author: James LaVern Williams
Publisher:
ISBN:
Category : Aerodynamics, Transonic
Languages : en
Pages : 44
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Book Description
A parameter-extraction algorithm was used to determine the lateral aerodynamic derivatives from flight data for the F-8 aircraft with supercritical wing. The flight data used were the recorded responses to aileron or rudder pulses for Mach numbers of 0.80, 0.90, and 0.98. Results of this study showed that a set of derivatives were determined which yielded a calculated aircraft response almost identical with the response measured in flight. Derivatives extracted from motion resulting from rudder inputs were somewhat different from those resulting from aileron inputs. It was found that the derivatives obtained from the rudder-input data were highly correlated in some instances. Those from the aileron input had very low correlations and appeared to be the more reliable.
Author:
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 404
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Book Description
Author: United States. Superintendent of Documents
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1282
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Book Description
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index
Author: William Tull Suit
Publisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 52
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Book Description
