Use of Two-Dimensional Data in Estimating Loads on a 45 deg Sweptback Wing With Slats and Partial-Span Flaps
Abstract
A study has been made of the application of two-dimensional data and span-loading theory for estimating the local loading characteristics on a swept wing with flaps. Estimated results, including local pressure distributions, span loadings, and the nonlinear local lift characteristics, are compared with similar results measured at large scale on a 45 deg sweptback wing of aspect ratio 6 having a 0.4-pan double-slotted flap both with and without a full-span slat. Two-dimensional pressure distributions when corrected for sweep were found to agree closely with the wing pressures for most local sections either on or off the flap. This agreement continued to the higher lift coefficients and even improved near maximum lift where the flap-induced effects became minimized. The Weissinger 7Xl method was found to provide reasonably accurate span loadings for this swept-wing configuration which had a relatively highly loaded type of flap. Two-dimensional lift data, together with span-loading theory, afforded quite accurate estimates of the local nonlinear lift characteristics, including maximum lift of sections outboard of the flap but were inadequate for inboard sections of the wing where the three-dimensional boundary-layer control exercises a dominant effect.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1953
- Accession Number
- ADA377479
Entities
People
- Harry A. James
- Lynn W. Hunton
Organizations
- National Aeronautics and Space Administration