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Author : Robert J. Tapscott
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (834 download)
Download or read book 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 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Alfred Gessow
Publisher :
ISBN 13 :
Total Pages : 33 pages
Book Rating : 4.:/5 (248 download)
Download or read book Charts for Estimating Performance of High-performance Helicopters written by Alfred Gessow and published by . This book was released on 1956 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: The charts may be used to study the effects of design changes on rotor performance and to indicate optimum performance conditions, as well as to estimate quickly rotor performance in forward flight. They are also useful in obtaining inflow-ratio and pitch-angle values for use in calculating flapping coefficients and spanwise loadings. The method of applying the charts t o performance estimation is illustrated through sample calculation of a typical rotor-performance problem.
Author : Robert J. Tapscott
Publisher :
ISBN 13 :
Total Pages : 31 pages
Book Rating : 4.:/5 (68 download)
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.
Author : Robert J. Tapscott
Publisher :
ISBN 13 :
Total Pages : 692 pages
Book Rating : 4.F/5 ( download)
Download or read book Charts for Estimating Rotor-blade Flapping Motion of High-performance Helicopters written by Robert J. Tapscott and published by . This book was released on 1956 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt: Theoretically derived charts showing steady-state and first- and second-harmonic flapping coefficients are presented for helicopter rotors having hinged rectangular blades with a linear twist of 0, -8, and -16 degrees. The charts, showing the rotor flapping coefficients for combinations of inflow ratio and blade pitch angle, are presented for tip-speed ratios ranging from 0.05 to 0.50.
Author : Alfred Gessow
Publisher :
ISBN 13 :
Total Pages : 18 pages
Book Rating : 4.:/5 (31 download)
Download or read book A Note on the Calculation of Helicopter Performance at High Tip-speed Ratios written by Alfred Gessow and published by . This book was released on 1959 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Herbert W. Talkin
Publisher :
ISBN 13 :
Total Pages : 50 pages
Book Rating : 4.:/5 (254 download)
Download or read book NACA Wartime Reports. Series L. written by Herbert W. Talkin and published by . This book was released on 1945 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Charts are presented relating helicopter aerodynamic design variables to performance in steady powered flight. The flight conditions covered are hovering, climb, and horizontal flight. Helicopter speed and lifting rotor power can be found from the charts for known values of fuselage drag coefficient and an average effective blade-element drag coefficient. An abbreviated method for estimating the drag coefficient from the airfoil polar is explained. Although the main emphasis of the report is on relating the design variables to performance, brief consideration is given to the effects of a number of secondary variables, among which are the number of blades, the rotational-energy loss, and the blade shape. An approximate method for estimating the conditions for blade stall is also explained.
Author : Watson H. Tanner
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (11 download)
Download or read book Charts for Estimating Rotary Wing Performance in Hover and at High Forward Speeds written by Watson H. Tanner and published by . This book was released on 1964 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. National Advisory Committee for Aeronautics
Publisher :
ISBN 13 :
Total Pages : 42 pages
Book Rating : 4.F/5 ( download)
Download or read book Report written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1956 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Watson H. Tanner
Publisher :
ISBN 13 :
Total Pages : 162 pages
Book Rating : 4.:/5 (31 download)
Download or read book Charts for Estimating Rotary Wing Performance in Hover and at High Forward Speeds written by Watson H. Tanner and published by . This book was released on 1964 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 60 pages
Book Rating : 4.:/5 (317 download)
Download or read book Methodology for Estimating Helicopter Performance and Weights Using Limited Data written by and published by . This book was released on 1991 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. National Advisory Committee for Aeronautics
Publisher :
ISBN 13 :
Total Pages : 386 pages
Book Rating : 4.3/5 (243 download)
Download or read book Technical Note - National Advisory Committee for Aeronautics written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1956 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Herbert W. Talkin
Publisher :
ISBN 13 :
Total Pages : 29 pages
Book Rating : 4.:/5 (249 download)
Download or read book Charts Showing Relations Among Primary Aerodynamic Variables for Helicopter-performance Estimation written by Herbert W. Talkin and published by . This book was released on 1947 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to facilitate solutions of the general problems of helicopter selection, the aerodynamic performance of rotors is presented in the form of charts showing relations between primary design and perfomrance variables. By the use of conventional helicopter theory, certain variables are plotted and other variables are considered fixed. Charts consructed in such a manner show typical results, trends, and limits of helicopter performance. Performance conditions considered include hovering, horizontal flight, climb, and ceiling. Special problems discussed include vertical climb and the use of rotor-speed-reduction gears for hovering.
Author : Robert A. Makofski
Publisher :
ISBN 13 :
Total Pages : 15 pages
Book Rating : 4.:/5 (249 download)
Download or read book Charts for Estimating the Hovering Endurance of a Helicopter written by Robert A. Makofski and published by . This book was released on 1956 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: As a means of comparing the performance capabilities of various helicopter propulsion systems, charts have been presented for estimating the hovering endurance of a helicopter in the form of a hovering-endurance parameter as a function of the ratio of total fuel load to helicopter initial weight for a range of initial thrust coefficients from 0.002 to 0.012 and for values of rotor mean lift coefficient from 0.24 to .072. The charts were presented for a helicopter having rotor blades with ideal twist. However, corrections may be applied to the hovering endurance to account for other combinations of twist and taper. The effects of stall and compressibility have been neglected.
Author : F. O'Hara
Publisher :
ISBN 13 :
Total Pages : 12 pages
Book Rating : 4.:/5 (31 download)
Download or read book A Method of Performance Reduction for Helicopters written by F. O'Hara and published by . This book was released on 1952 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The equations for helicopter performance are derived in a form suitable for the development of performance reduction methods, and the equations obtained provide also a simple method of performance estimation. Formulae are determined for reducing observed performance data to standard temperature conditions and for estimating the effect of weight changes on performance. Charts of the relationships are given for typical values of helicopter and engine characteristics."--Author's summary
Author : Wayne Johnson
Publisher : Cambridge University Press
ISBN 13 : 1107355281
Total Pages : 949 pages
Book Rating : 4.1/5 (73 download)
Download or read book Rotorcraft Aeromechanics written by Wayne Johnson and published by Cambridge University Press. This book was released on 2013-04-29 with total page 949 pages. Available in PDF, EPUB and Kindle. Book excerpt: A rotorcraft is a class of aircraft that uses large-diameter rotating wings to accomplish efficient vertical take-off and landing. The class encompasses helicopters of numerous configurations (single main rotor and tail rotor, tandem rotors, coaxial rotors), tilting proprotor aircraft, compound helicopters, and many other innovative configuration concepts. Aeromechanics covers much of what the rotorcraft engineer needs: performance, loads, vibration, stability, flight dynamics, and noise. These topics include many of the key performance attributes and the often-encountered problems in rotorcraft designs. This comprehensive book presents, in depth, what engineers need to know about modelling rotorcraft aeromechanics. The focus is on analysis, and calculated results are presented to illustrate analysis characteristics and rotor behaviour. The first third of the book is an introduction to rotorcraft aerodynamics, blade motion, and performance. The remainder of the book covers advanced topics in rotary wing aerodynamics and dynamics.
Author : Alfred Gessow
Publisher :
ISBN 13 :
Total Pages : 50 pages
Book Rating : 4.:/5 (31 download)
Download or read book Tables and Charts for Estimating Stall Effects on Lifting-rotor Characteristics written by Alfred Gessow and published by . This book was released on 1960 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 910 pages
Book Rating : 4.3/5 (91 download)
Download or read book NASA Technical Note written by and published by . This book was released on 1976 with total page 910 pages. Available in PDF, EPUB and Kindle. Book excerpt:
