Theoretical Aerodynamics of Flexible Wings at Low Speeds V - Engineering-Method for Estimating Parawing Performance

摘要

This report which is Part V of a general parawing study is for the purpose of presenting engineering methods for predicting low-speed, lift and drag characteristics of parawings. Most existing parawing information, other than that generated.under this contract for delta parawings, is for large values of canopy slackness and for a planform having leading edges and root chord of equal length (here-in called NASA planform). Theory developed under this contract was I found to furnish a satisfactory basis for an engineering prediction method-for the lift and drag characteristics of triangular parawings. For NASA parawings, it was found necessary to place more emphasis on correlation techniques and empirical results in developing a satis¬factory engineering prediction method. Calculative examples for both /types of parawings are included. The desirability of further drag measurements with special emphasis on measuring support interference effects is pointed out.