“Summary of Low Speed Airfoil Data”
Volume 2
In this volume, the wind-tunnel test results of over 30 airfoils (shown below) are presented. Although a wide selection of airfoils was tested, considerable attention was focused in three particular areas.
First, in radio control soaring competition, the use of camber-changing flaps in competition has become essential. Unfortunately, until now, there has been little flap data available, and consequently it has been difficult to identify the favorable characteristics of airfoils designed for use with flaps. Thus, several airfoils were tested with flaps. These results, combined with flight-test reports, have helped to identify some of the desirable qualities of flapped airfoils for R/C soaring.
Second, a new approach to making optimal use of boundary-layer trips on low Reynolds number airfoils was initiated. More work in this area is planned, but the preliminary results are encouraging. Third, interest in the potential use of Gurney flaps, which are small downward-deflected
"Summary .. Volume 2" is 251 pages of narrative and data much like Michael's previous works "Summary of Low-Speed Airfoil Data” Volumes 1 (1995) and 3 (1997), and "Airfoils at Low Speeds" (1989). This book is similar in content and organization to Volume 1, and Is similar also to the material in "Airfoils at Low Speeds".
Airfoil test results included in Volume 2.
