______________________________________________________________________ Now available: C.A. Lyon, A.P. Broeren, P. Giguere, A. Gopalarathnam, and M.S. Selig, "Summary of Low-Speed Airfoil Data, Volume 3," ISBN 0-9646747-3-4 ($35 + shipping) To order contact: herkstok@aol.com ______________________________________________________________________ Summary of Low-Speed Airfoil Data - Volume 3 The latest volume of Summary of Low-Speed Airfoil Data documents the wind-tunnel test results of 37 airfoils, including A18 LRN1007 SD7032 Avistar PT-40 SD7037 BW-3 RG14 SD7062 CG Ultimate RG15 SD7080 Clark-Y S6063 SG6040 DH4009 S7012 SG6041 E231 S7075 SG6042 E374 S8036 SG6043 E387 S8037 Trainer 60 E472 S8052 Ultra-Sport 1000 ESA SA7035 USNPS-4 Falcon 56 MK II SA7036 Goe 417a SA7038 For the R/C soaring airfoils, several were tested with various trailing-edge flap settings as suggested by R/C soaring enthusiasts. In particular, large flap settings of 15-25 degs to were tested to give insight into possible performance improvements during launch, and smaller flap settings of 2.5 degs were tested to represent typical control deflections during thermal soaring. Supplementing this data are leading-edge flap settings of -3 deg and 2.5 deg tested on the popular SD7037. Also, as variations of the popular SD7037, three new airfoils, the SA7035, SA7036, and SA7038, were designed and wind-tunnel tested. The second group of airfoils used on powered R/C aircraft were tested. With a majority of the attention from airfoil designers focused on the design of new R/C soaring airfoils, a large disparity in performance has resulted between sailplane and powered airfoils. With this volume, the UIUC LSATs team has attempted to lay the foundation for reducing this disparity. To be more specific, several airfoils used on popular powered R/C aircraft were tested to provide a benchmark against which new designs can be compared. Serving as an indicator of the possible performance improvements, three new airfoils, the S8036, S8037, and S8052, were designed and tested. Airfoils for use on small wind turbines comprise the third group of airfoils tested. Among these are four new airfoils (SG6040 - SG6043) specifically designed for variable-speed wind turbines. The reader will note that several of the airfoils listed here were designed specifically for use on aircraft (A18, SD7032, and SD7062). These airfoils, together with three others grouped under the "Sailplane" and "Powered Aircraft" headings (Clark-Y, S7012, and SD7037), were tested with leading-edge roughness to establish their potential for use on small wind turbines. Also, this volume contains a rather extensive study of the effect boundary-layer trips have on airfoil performance. Experience, however, has proven such a study to be impractical for every airfoil. Therefore, two candidate airfoils were selected which are representative of a majority of the airfoils used on R/C model aircraft. These were the SD7037 and the E374. Each was tested with various trip configurations (single, multiple), geometries (2-D, 3-D), locations, and heights. "Summary of Low-Speed Airfoil Data - Vol 3" is 418 pages of narrative and data much like the previous works "Summary of Low-Speed Airfoil Data - Vols 1 and 2" (1995, 1996) and "Airfoils at Low Speeds" (SoarTech #8 - 1989). This book is similar in content and organization to Volumes 1 and 2. We've set the price at $35 + shipping: Book price Shipping and Packaging Qua Cost Total $35 Anywhere in the US $6 = ___ x $41 = ____ $35 International surface mail $8 = ___ x $43 = ____ $35 Airmail to Europe $20 = ___ x $55 = ____ $35 Airmail to Asia/Africa $25 = ___ x $60 = ____ $35 Airmail to Pacific Rim $27 = ___ x $62 = ____ All of the actual tabulated data and airfoil coordinates (but none of the narrative or illustrations) in the book are available on-disk in ascii text files. There is no program for use of these files included on the disk. These are provided for those who wish to use the data in their own programs. By formatting the data properly, their use can make manual re-entry of the data unnecessary. The price for the disk data in the USA is $20 including postage. For disk orders from outside of the USA add one dollar to it's price. A significant portion of the price received from all book and disk sales will be returned to UIUC Low-Speed Airfoil Tests (LSATs) program to provide part of the continuing support for the ongoing test program. Other books and data in the series are priced as follows: Qty Totals ___ @ $20 = $ ____ Airfoils at Low Speeds, SoarTech 8, 1989 M.S. Selig, J.F. Donovan, & D.B. Fraser ___ @ $15 = $ ____ Data Disk SoarTech 8 ___ @ $25 = $ ____ Summary of Low-Speed Airfoil Data - Vol. 1, June 1995 M.S. Selig, C.A. Lyon, P. Giguere, C.N. Ninham, & J.J. Guglielmo ___ @ $15 = $ ____ Data Disk Vol 1 ___ @ $25 = $ ____ Summary of Low-Speed Airfoil Data - Vol. 2, May 1996 M.S. Selig, J.J. Guglielmo, A.P. Broeren, & P. Giguere ___ @ $15 = $ ____ Data Disk Vol 2 $ ____ Subtotal $ ____ Virginia residents add 4-1/2% sales tax $ ____ Shipping for SoarTech 8 - Airmail to Canada and Mexico add $2 per book - Surface mail to other countries add $5 per book - Airmail to other countries add $15 per book $ ____ Shipping for Vols 1 and 2 - Vols 1 and 2 prices include postage for shipping within the US - International surface mail outside the USA add $4 per book - Airmail to the Western Hemisphere add $6 per book - Airmail to Europe add $13 per book - Airmail to other parts of the world add $17 per book $ ____ Shipping for data disks - Prices above include postage for shipping within the USA - For orders outside the USA add $1 per disk TOTAL $ ____ Provide a check or money order in US Dollars that can be paid at a US bank. US cash is also accepted. The SoarTech operation is not big enough to handle credit card orders. A significant portion of the price received from all book and disk sales will be returned to UIUC to provide part of the continuing support for the ongoing test program. Send book and data disk orders to: SoarTech Publications Herk Stokely 1504 N. Horseshoe Circle Virginia Beach, VA 23451 USA e-mail: herkstok@aol.com When ordering, PLEASE provide a check or money order in US Dollars which can be paid at a US bank. U.S. cash is also accepted. Residents of Virginia should add the state 4-1/2 percent sales tax to the above rates.