Accession Number : AD0486081

Title :   THE THEORETICAL CHARACTERISTICS OF ONE-LOBED PARAWINGS IN COMBINED PITCH AND SIDESLIP.

Descriptive Note : Technical rept.,

Corporate Author : ITEK CORP PALO ALTO CA VIDYA DIV

Personal Author(s) : Nielsen, Jack N. ; Lynes, Larry L. ; Goodwin, Frederick K.

Report Date : MAY 1966

Pagination or Media Count : 145

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)

Descriptors :   (*PARAWINGS, AERODYNAMIC CHARACTERISTICS), DELTA WINGS, PITCH(MOTION), YAW, ROLL, MATHEMATICAL PREDICTION, TABLES(DATA), MOMENTS, SKIDDING, WINGS, SLENDER BODIES, WING BODY CONFIGURATIONS, ANGLE OF ATTACK, LIFT, DRAG.

Subject Categories : Aircraft
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE