Download or read book Supplementary Charts for Estimating Performance of High-performance Helicopters written by Robert J. Tapscott and published by . This book was released on 1955 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: Charts published in NACA TN 3323 for estimating the performance of high-performance helicopters were applicable to rotors having hinged rectangular blades with a linear twist of -8 degrees. Supplementary charts are presented herein covering twists of 0 degrees and -16 degrees.