Download or read book The Effects of Compressibility on the Upwash at the Propeller Planes of a Four-engine Tractor Airplane Configuration Having a Wing with 40 Degrees of Sweepback and an Aspect Ratio of 10 written by Armando E. Lopez and published by . This book was released on 1953 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results indicate that for Mach numbers up to 0.60 the upwash angles can be predicted accurately by the available theoretical methods. At Mach numbers above 0.60 the experimental values were less than those predicted by theory and this difference increased with increasing Mach number.