Accession Number:

ADA106160

Title:

A Method of Estimating Upwash Angle at Noseboom-Mounted Vanes

Descriptive Note:

Final rept.

Corporate Author:

AIR FORCE FLIGHT TEST CENTER EDWARDS AFB CA

Personal Author(s):

Report Date:

1981-06-01

Pagination or Media Count:

117.0

Abstract:

This technical information memorandum documents a theoretically-based method of estimating the upwash angle at noseboom-mounted vanes of an arbitrary aircraft. The method is commonly called the Yaggy-Rogallo technique and has been used successfully for many years at the NASADryden Flight Research Center NASADFRC and the Air Force Flight Test Center AFFTC. The technique divides any aircraft into a collection of bodies of revolution and thin airfoils, makes upwash angle estimates for each component, and combines the individual estimates into a single estimate. Development of the theory for upwash angle estimates of both bodies of revolution and thin airfoils are presented. Recent improvements in solution and use of the Yaggy-Rogallo equations are also presented. Guidelines for using the upwash angle estimates in data reduction and analysis are presented along with comparisons to flight test upwash calibration data showing excellent results. FORTRAN V computer programs were written to simplify and expedite making upwash angle estimates. Listings of the program code, a users guide, and a programmers guide are included in the memorandum.

Subject Categories:

  • Aircraft
  • Computer Programming and Software
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE