A Correlation Between Flight-Determined Derivatives and Wind-Tunnel Data for the X-24B Research Aircraft

Sim, Alex G. (1997) A Correlation Between Flight-Determined Derivatives and Wind-Tunnel Data for the X-24B Research Aircraft. Technical Report NASA TM-113084, Research Engineering, NASA Dryden Flight Research Center.

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Abstract

Longitudinal and lateral-directional estimates of the aerodynamic derivatives of the X-24B research aircraft were obtained from flight data by using a modified maximum likelihood estimation method. Data were obtained over a Mach number range from 0.35 to 1.72 and over an angle of attack range from 3.5 deg to 15.7 deg. Data are presented for a subsonic and transonic configuration. The flight derivatives were generally consistent and documented the aircraft well. The correlation between the flight data and wind-tunnel predictions is presented and discussed.

EPrint Type:	NASA Technical Memorandum
Keywords:	Aerodynamic derivatives, Flight-determined X-24B derivatives, Parameter identification, X-24B research aircraft
Subjects:	Aircraft/Project: X-24B (01 - 09) Aeronautics: (08) Aircraft Stability And Control
ID Code:	140
Deposited On:	08 June 2004
Additional Information:	67 pages. Previously published as NASA Service Technical Memorandum SX-3371, March 1976 with the same title.