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Wind Tunnel Investigation Of A Lifting Rotor Operating At Tip Speed Ratios From 065 To 145
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Book Synopsis Wind-tunnel Investigation of a Lifting Rotor Operating at Tip-speed Ratios from 0.65 to 1.45 by : Julian L. Jenkins (Jr.)
Download or read book Wind-tunnel Investigation of a Lifting Rotor Operating at Tip-speed Ratios from 0.65 to 1.45 written by Julian L. Jenkins (Jr.) and published by . This book was released on 1965 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wind-tunnel Investigation of a Lifting Rotor Operating at Tip-speed Ratios from 0.65 to 1.45 by : Julian L. Jenkins
Download or read book Wind-tunnel Investigation of a Lifting Rotor Operating at Tip-speed Ratios from 0.65 to 1.45 written by Julian L. Jenkins and published by . This book was released on 1965 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Large-scale Wind-tunnel Investigation of a V/STOL Transport Model with Wing-mounted Lift Fans and Fuselage-mounted Life-cruise Engines for Propulsion by : Jerry V. Kirk
Download or read book Large-scale Wind-tunnel Investigation of a V/STOL Transport Model with Wing-mounted Lift Fans and Fuselage-mounted Life-cruise Engines for Propulsion written by Jerry V. Kirk and published by . This book was released on 1967 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Investigation of Periodic Forces and Moments Transmitted to the Hub of the Four Lifting Rotor Configurations by : Milton A. Silveira
Download or read book An Investigation of Periodic Forces and Moments Transmitted to the Hub of the Four Lifting Rotor Configurations written by Milton A. Silveira and published by . This book was released on 1962 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wind Tunnel Investigation of Rotor Lift and Propulsive Force at High Speed by : Frank McHugh
Download or read book Wind Tunnel Investigation of Rotor Lift and Propulsive Force at High Speed written by Frank McHugh and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Experimental Investigation of a Free-tip Rotor Configuration in a Forward Flight Wind-tunnel Test by :
Download or read book An Experimental Investigation of a Free-tip Rotor Configuration in a Forward Flight Wind-tunnel Test written by and published by . This book was released on 1983 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analysis of the Free-tip Rotor Wind-tunnel Test Results by :
Download or read book Analysis of the Free-tip Rotor Wind-tunnel Test Results written by and published by . This book was released on 1985 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Results of a Wind Tunnel Investigation of a Model Rotor with a Free Tip by :
Download or read book The Results of a Wind Tunnel Investigation of a Model Rotor with a Free Tip written by and published by . This book was released on 1985 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wind-tunnel Investigation to Determine the Critical Advance Ratio of the 8/31-scale Mcdonnell Model 82 Convertiplane Rotor by : HANS K. DOETSCH
Download or read book Wind-tunnel Investigation to Determine the Critical Advance Ratio of the 8/31-scale Mcdonnell Model 82 Convertiplane Rotor written by HANS K. DOETSCH and published by . This book was released on 1953 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents test results on the 8/3l-scale McDonnell Model 82 Convertiplane in the Massie Memorial Wind Tunnel, Wright Air Development Center. The purpose of these tests was to determine the high-speed potential of the McDonnell rotor at a zero rotor angle of attack and in an approximately zero rotor lift condition. The main results are as follows: The critical advance ratio, a defined by the development of unstable blade flapping of the model rotor, decreases from approximately 1.6 at 400 rpm to approximately 1.3 at 800O rpm. The Wright Field result at 400 rpm agrees with previous tests with the same rotor and at the same rotor speed. The considerable effect of rotor speed on the critical advance ratio was unexpected and no definite explanation can be given for it either from these tests or from the available theoretical treatments of the rotor blade motion. The theoretical investigations on rigid rotor blades indicate stable blade motion up to much higher advance ratios than measured during these tests. However, these theoretical) investigations were made under simplifying assumptions which do not represent the true conditions on the rotor blades. Some of the discrepancies between these assumptions and the true blade conditions are discussed in this report. The discussion of the test results and their comparison with the results of References 3 and 4 show that the knowledge about the nature of the observed blade instability is still insufficient and that more experimental and theoretical work is required to clarify the problem.
Book Synopsis Jet-boundary Corrections for Lifting Rotors Centered in Rectangular Wind Tunnels by : Harry H. Heyson
Download or read book Jet-boundary Corrections for Lifting Rotors Centered in Rectangular Wind Tunnels written by Harry H. Heyson and published by . This book was released on 1960 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wind Tunnel Investigation of a Circulation Controlled Airfoil Rotor Concept by : W. H. Gallaher
Download or read book Wind Tunnel Investigation of a Circulation Controlled Airfoil Rotor Concept written by W. H. Gallaher and published by . This book was released on 1968 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: A 6 foot diameter rigid rotor, employing circulation controlled blades, was tested in an 8 x 12 foot low speed wind tunnel. Circulation control was generated by injecting gas tangentially from slots in the two circular cylinder blades. The tip jet driven model was tested as a propeller and in the normal helicopter mode. Tip speeds up to 440 fps were attained for the model operating in the propeller mode, while advance ratios up to 0.8 were attained in the helicopter mode. A computer simulation of the rotor model was used to analyze the wind tunnel results. Comparison between selected wind tunnel results and the computer simulation are presented. Agreement between selected propeller mode results and the computer simulation was obtained by using peak inflow velocities measured by a high resolution pitotstatic probe. The correlation between the helicopter mode tests and the computer simulation is commensurate with the large model to tunnel ratio and the present model support system. (Author).
Book Synopsis A Wind-tunnel and Analytical Study of the Conversion from Wing Lift to Rotor Lift on a Composite-lift VTOL Aircraft by : Robert J. Huston
Download or read book A Wind-tunnel and Analytical Study of the Conversion from Wing Lift to Rotor Lift on a Composite-lift VTOL Aircraft written by Robert J. Huston and published by . This book was released on 1969 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Trim Requirements and Static-stability Derivates from a Wind-tunnel Investigation of a Lifting Rotor in Transition by : Julian L. Jenkins
Download or read book Trim Requirements and Static-stability Derivates from a Wind-tunnel Investigation of a Lifting Rotor in Transition written by Julian L. Jenkins and published by . This book was released on 1965 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wind Tunnel Investigation of Semirigid Full-scale Rotors Operating at High Advance Ratios by : Bruce D. Charles
Download or read book Wind Tunnel Investigation of Semirigid Full-scale Rotors Operating at High Advance Ratios written by Bruce D. Charles and published by . This book was released on 1969 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wind Tunnel Investigation at Supersonic Speeds of the Lift, Drag, Static-Stability and Control Characteristics of a 0.03-Scale Model of an Interim Development Version of the B-70 Airplane by : James C. Daugherty
Download or read book Wind Tunnel Investigation at Supersonic Speeds of the Lift, Drag, Static-Stability and Control Characteristics of a 0.03-Scale Model of an Interim Development Version of the B-70 Airplane written by James C. Daugherty and published by . This book was released on 1961 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Tables and Charts for Estimating Stall Effects on Lifting-rotor Characteristics by : Alfred Gessow
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:
Book Synopsis Full-scale S-76 Rotor Performance and Loads at Low Speeds in the NASA Ames 80- by 120-Foot Wind Tunnel by : Patrick M. Shinoda
Download or read book Full-scale S-76 Rotor Performance and Loads at Low Speeds in the NASA Ames 80- by 120-Foot Wind Tunnel written by Patrick M. Shinoda and published by . This book was released on 1996 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: A full-scale helicopter rotor test was conducted in the NASA Ames 80- by 120-Foot Wind Tunnel with a four-bladed S-76 rotor system. Rotor performance and loads data were obtained over a wide range of rotor shaft angles-of-attack and thrust conditions at tunnel speeds ranging from 0 to 100 kt. The primary objectives of this test were (1) to acquire forward flight rotor performance and loads data for comparison with analytical results; (2) to acquire S-76 forward flight rotor performance data in the 80- by 120-Foot Wind Tunnel to compare with existing full-scale 40- by 80-Foot Wind Tunnel test data that were acquired in 1977; (3) to evaluate the acoustic capability of the 80- by 120- Foot Wind Tunnel for acquiring blade vortex interaction (BVI) noise in the low speed range and compare BVI noise with in-flight test data; and (4) to evaluate the capability of the 80- by 120-Foot Wind Tunnel test section as a hover facility. The secondary objectives were (1) to evaluate rotor inflow and wake effects (variations in tunnel speed, shaft angle, and thrust condition) on wind tunnel test section wall and floor pressures; (2) to establish the criteria for the definition of flow breakdown (condition where wall corrections are no longer valid) for this size rotor and wind tunnel cross-sectional area; and (3) to evaluate the wide-field shadowgraph technique for visualizing full-scale rotor wakes. This data base of rotor performance and loads can be used for analytical and experimental comparison studies for full-scale, four-bladed, fully articulated rotor systems. Rotor performance and structural loads data are presented in this report.
