THE THEORETICAL CHARACTERISTICS OF ONE-LOBED PARAWINGS IN COMBINED PITCH AND SIDESLIP.
Abstract
On the basis of slender-body theory, an analysis is presented for predicting the shape and aerodynamic characteristics of one-lobed delta parawings at combined angles of attack and sideslip. These characteristics in nondimensional form depend only on the tension parameter and the ratio of the sideslip angle to semiapex angle. An extensive set of calculations has been made as a function of these parameters, and the results are presented in tabular form for design purposes. The results agree with previously calculated results for zero sideslip and with delta wing results for large tension parameters. It has been found that for a given wing there is a range of angle of attack and sideslip in which the wing can operate without inducing luffing of the windward leading edge. It appears desirable to operate the wing in this range not only to avoid luffing, but to obtain the advantage of the low induced drag. The one-lobed parawing shows a stable dihedral effect in that the rolling moment due to positive sideslip is negative above the main luffing-boundary. There is negative sideforce at positive angles of attack and sideslip. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1966
- Accession Number
- AD0486081
Entities
People
- Frederick K. Goodwin
- Jack N. Nielsen
- Larry L. Lynes