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The Analysis Of Wind Tunnel Tests Made On A Model Helicopter Rotor Blade Incorporating A Swept Tip
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Book Synopsis The Analysis of Wind Tunnel Tests Made on a Model Helicopter Rotor Blade Incorporating a Swept Tip by : R.H. Markiewicz
Download or read book The Analysis of Wind Tunnel Tests Made on a Model Helicopter Rotor Blade Incorporating a Swept Tip written by R.H. Markiewicz and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wind Tunnel Evaluation of a Model Helicopter Main-Rotor Blade With Slotted Airfoils at the Tip by :
Download or read book Wind Tunnel Evaluation of a Model Helicopter Main-Rotor Blade With Slotted Airfoils at the Tip written by and published by . This book was released on 2001 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Data for rotors using unconventional airfoils are of interest to permit an evaluation of this technology's capability to meet the U.S. Army's need for increased helicopter mission effectiveness and improved safety and survivability. Thus, an experimental investigation was conducted in the Langley Transonic Dynamics Tunnel (TDT) to evaluate the effect of using slotted airfoils in the rotor blade tip region (85 to 100 percent radius) on rotor aerodynamic performance and loads. Four rotor configurations were tested in forward flight at advance ratios from 0.15 to 0.45 and in hover in-ground effect. The hover tip Mach number was 0.627, which is representative of a design point of 4000-ft geometric altitude and a temperature of 95 degrees F. The baseline rotor configuration had a conventional single element airfoil in the tip region. A second rotor configuration had a forward-slotted airfoil with a -6 degrees slat, a third configuration had a forward-slotted airfoil with a -10 degrees slat, and a fourth configuration had an aft-slotted airfoil with a 3 degrees flap (trailing edge down). The results of this investigation indicate that the -6 degrees slat configuration offers some performance and loads benefits over the other three configurations.
Book Synopsis Aeroelastic Considerations for Torsionally Soft Rotors by : Wayne R. Mantay
Download or read book Aeroelastic Considerations for Torsionally Soft Rotors written by Wayne R. Mantay and published by . This book was released on 1986 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: A research study was initiated to systematically determine the impact of selected blade tip geometric parameters on conformable rotor performance and loads characteristics. The model articulated rotors included baseline and torsionally soft blades with interchangeable tips. Seven blade tip designs were evaluated on the baseline rotor and six tip designs were tested on the torsionally soft blades. The designs incorporated a systemmatic variation in geometric parameters including sweep, taper, and anhedral. The rotors were evaluated in the NASA Langley Transonic Dynamics Tunnel at several advance ratios, lift and propulsive force values, and tip Mach numbers. A track sensitivity study was also conducted at several advance ratios for both rotors. Based on the test results, tip parameter variations generated significant rotor performance and loads differences for both baseline and torsionally soft blades. Azimuthal variation of elastic twist generated by variations in the tip parameters strongly correlated with rotor performance and loads, but the magnitude of advancing blade elastic twist did not. In addition, fixed system vibratory loads and rotor track for potential conformable rotor candidates appears very sensitive to parametric rotor changes. (Author).
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Full Scale Wind-tunnel Tests of Blowing Boundary-layer Control Applied to a Helicopter Rotor by : John L. McCloud
Download or read book Full Scale Wind-tunnel Tests of Blowing Boundary-layer Control Applied to a Helicopter Rotor written by John L. McCloud and published by . This book was released on 1960 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781721101931 Total Pages :132 pages Book Rating :4.1/5 (19 download)
Book Synopsis Wind Tunnel Evaluation of a Model Helicopter Main-Rotor Blade with Slotted Airfoils at the Tip by : National Aeronautics and Space Administration (NASA)
Download or read book Wind Tunnel Evaluation of a Model Helicopter Main-Rotor Blade with Slotted Airfoils at the Tip written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-15 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Data for rotors using unconventional airfoils are of interest to permit an evaluation of this technology's capability to meet the U.S. Army's need for increased helicopter mission effectiveness and improved safety and survivability. Thus, an experimental investigation was conducted in the Langley Transonic Dynamics Tunnel (TDT) to evaluate the effect of using slotted airfoils in the rotor blade tip region (85 to 100 percent radius) on rotor aerodynamic performance and loads. Four rotor configurations were tested in forward flight at advance ratios from 0.15 to 0.45 and in hover in-ground effect. The hover tip Mach number was 0.627, which is representative of a design point of 4000-ft geometric altitude and a temperature of 95 F. The baseline rotor configuration had a conventional single-element airfoil in the tip region. A second rotor configuration had a forward-slotted airfoil with a -6 deg slat, a third configuration had a forward-slotted airfoil with a -10 slat, and a fourth configuration had an aft-slotted airfoil with a 3 deg flap (trailing edge down). The results of this investigation indicate that the -6 deg slat configuration offers some performance and loads benefits over the other three configurations. Noonan, Kevin W. and Yeager, William T., Jr. and Singleton, Jeffrey D. and Wilbur, Matthew L. and Mirick, Paul H. Langley Research Center RTOP 581-10-11-01
Book Synopsis Wind Tunnel Evaluation of a Model Helicopter Main-rotor Blade with Slotted Airfoils at the Tip by : United States. National Aeronautics and Space Administration
Download or read book Wind Tunnel Evaluation of a Model Helicopter Main-rotor Blade with Slotted Airfoils at the Tip written by United States. National Aeronautics and Space Administration and published by . This book was released on 2001 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: Data for rotors using unconventional airfoils are of interest to permit an evaluation of this technology's capability to meet the U.S. Army's need for increased helicopter mission effectiveness and improved safety and survivability. Thus, an experimental investigation was conducted in the Langley Transonic Dynamics Tunnel (TDT) to evaluate the effect of using slotted airfoils in the rotor blade tip region (85 to 100 percent radius) on rotor aerodynamic performance and loads. Four rotor configurations were tested in forward flight at advance ratios from 0.15 to 0.45 and in hover in-ground effect. The hover tip Mach number was 0.627, which is representative of a design point of 4000-ft geometric altitude and a temperature of 95 F. The baseline rotor configuration had a conventional single-element airfoil in the tip region.
Book Synopsis Acoustical Effects of Blade Tip Shape Changes on a Full Scale Helicopter Rotor in a Wind Tunnel by :
Download or read book Acoustical Effects of Blade Tip Shape Changes on a Full Scale Helicopter Rotor in a Wind Tunnel written by and published by . This book was released on 1978 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Vertica written by and published by . This book was released on 1988 with total page 984 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wind-Tunnel Investigation of the Effects of Blade Tip Geometry on the Interaction of Torsional Loads and Performance for an Articulated Helicopter Rotor by :
Download or read book Wind-Tunnel Investigation of the Effects of Blade Tip Geometry on the Interaction of Torsional Loads and Performance for an Articulated Helicopter Rotor written by and published by . This book was released on 1981 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation was conducted in the Langley Transonic Dynamics Tunnel to determine the effects of rotor blade tip geometry on the interaction between torsional loads and performance for an articulated helicopter rotor. Tests were conducted using four tip geometries at advance ratios of 0.20, 0.30, and 0.35. Geometric variations between tips consisted to taper, sweep, and anhedral. (Author).
Book Synopsis Performance Data from a Wind-tunnel Test of Two Main-rotor Blade Designs for a Utility-class Helicopter by : Jeffrey D. Singleton
Download or read book Performance Data from a Wind-tunnel Test of Two Main-rotor Blade Designs for a Utility-class Helicopter written by Jeffrey D. Singleton and published by DIANE Publishing. This book was released on 1990 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rotorcraft Dynamics 1984 written by and published by . This book was released on 1985 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wind-tunnel Evaluation of an Advanced Main-rotor Blade Design for a Utility-class Helicopter by : William T. Yeager (Jr.)
Download or read book Wind-tunnel Evaluation of an Advanced Main-rotor Blade Design for a Utility-class Helicopter written by William T. Yeager (Jr.) and published by . This book was released on 1987 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation was conducted in the Langley Transonic Dynamics Tunnel to evaluate differences between an existing utility-class main-rotor blade and an advanced-design main-rotor blade. The two rotor-blade designs were compared with regard to rotor performance, oscillatory pitch-link loads, and 4-per-rev vertical fixed-system loads. Tests were conducted in hover and over a range of simulated full-scale gross weights and density altitude conditions at advance ratios from 0.15 to 0.40. Results indicate that the advanced-blade design offers performance improvements over the baseline blade in both hover and forward flight. Pitch-link oscillatory loads for the baseline rotor were more sensitive to the test condition than those of the advanced blade was larger than that produced by the baseline blade at all test conditions.
Book Synopsis An Experimental Investigation of the Effect of Wind Tunnel Walls on the Aerodynamic Performance of a Helicopter Rotor by : Victor M. Ganzer
Download or read book An Experimental Investigation of the Effect of Wind Tunnel Walls on the Aerodynamic Performance of a Helicopter Rotor written by Victor M. Ganzer and published by . This book was released on 1960 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Morphing Wing Technologies by : Sergio Ricci
Download or read book Morphing Wing Technologies written by Sergio Ricci and published by Butterworth-Heinemann. This book was released on 2017-10-27 with total page 970 pages. Available in PDF, EPUB and Kindle. Book excerpt: Morphing Wings Technologies: Large Commercial Aircraft and Civil Helicopters offers a fresh look at current research on morphing aircraft, including industry design, real manufactured prototypes and certification. This is an invaluable reference for students in the aeronautics and aerospace fields who need an introduction to the morphing discipline, as well as senior professionals seeking exposure to morphing potentialities. Practical applications of morphing devices are presented—from the challenge of conceptual design incorporating both structural and aerodynamic studies, to the most promising and potentially flyable solutions aimed at improving the performance of commercial aircraft and UAVs. Morphing aircraft are multi-role aircraft that change their external shape substantially to adapt to a changing mission environment during flight. The book consists of eight sections as well as an appendix which contains both updates on main systems evolution (skin, structure, actuator, sensor, and control systems) and a survey on the most significant achievements of integrated systems for large commercial aircraft. Provides current worldwide status of morphing technologies, the industrial development expectations, and what is already available in terms of flying systems Offers new perspectives on wing structure design and a new approach to general structural design Discusses hot topics such as multifunctional materials and auxetic materials Presents practical applications of morphing devices
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1976 with total page 968 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dynamic Model Wind Tunnel Tests of a Variable-Diameter, Telescoping- Blade Rotor System (TRAC Rotor). by : Evan A. Fradenburgh
Download or read book Dynamic Model Wind Tunnel Tests of a Variable-Diameter, Telescoping- Blade Rotor System (TRAC Rotor). written by Evan A. Fradenburgh and published by . This book was released on 1973 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analytical and experimental program was conducted to establish feasibility and determine characteristics of the Sikorsky TRAC rotor system, which is a unique variable-diameter, telescoping-blade concept for advanced rotary-wing aircraft. The program included a preliminary design study of a full-scale blade, wind tunnel tests of a dynamically scaled rotor model in various flight modes, and correlation of experimental results with theory. Feasibility was established for the TRAC rotor operating both as a high-speed compound helicopter and as a stopped/stowed rotor configuration. The basic blade structural design and the retraction system were verified with the model, which was scaled for operation at full tip speeds and forward speeds.
