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Rotors (Helicopters) -- Aerodynamics -- Simulation methods

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• Rotors (Helicopters) -- Aerodynamics
• Simulation methods

• Rotors (Helicopters) -- Aerodynamics -- Computer simulation
• Rotors (Helicopters) -- Aerodynamics -- Mathematical models

• Application of special-purpose digital computers to rotorcraft real-time simulation (National Aeronautics and Space Administration, Scientific and Technical Information Office ;, 1978), by D. Brian Mackie, Seth Michelson, Computer Sciences Corporation, Ames Research Center, and United States. National Aeronautics and Space Administration. Scientific and Technical Information Office (page images at HathiTrust)

• Modal analysis of UH-60A instrumented rotor blades (National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division ;, 1990), by Karen S. Hamade, Robert M. Kufeld, and Ames Research Center (page images at HathiTrust)
• Free wake analysis of hover performance using a new influence coefficent method (National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division ;, 1990), by Todd R. Quackenbush, Ames Research Center, and Inc Continuum Dynamics (page images at HathiTrust)
• Analysis of helicopter rotor blade torsional oscillations due to stall (National Aeronautics and Space Administration ;, 1975), by Peter Crimi, U.S. Army Air Mobility Research and Development Laboratory, Langley Research Center, and Avco Corporation. Systems Division (page images at HathiTrust)
• Investigation of nonlinear inviscid and viscous flow effects in the analysis of dynamic stall (National Aeronautics and Space Administration ;, 1974), by Peter Crimi, Langley Research Center, and Avco Corporation. Systems Division (page images at HathiTrust)
• Development of an analysis for the determination of coupled helicopter rotor/control system dynamic response (National Aeronautics and Space Administration ;, 1975), by Lawrence R. Sutton, Stephen A. Rinehart, Langley Research Center, and Rochester Applied Sciences Associates (page images at HathiTrust)
• The passage of an infinite swept airfoil through an oblique gust (National Aeronautics and Space Administration ;, 1974), by John J. Adamczyk, Langley Research Center, and United Aircraft Corporation. Research Laboratories (page images at HathiTrust)
• The effect of helicopter main rotor blade phasing and spacing on performance, blade loads, and acoustics (National Aeronautics and Space Administration ;, 1976), by Santu T. Gangwani, Systems Research Laboratories. Rasa Division, and United States National Aeronautics and Space Administration (page images at HathiTrust)
• Analysis of stall flutter of a helicopter rotor blade (National Aeronautics and Space Administration ;, 1973), by Peter Crimi, Langley Research Center, and Avco Corporation. Systems Division (page images at HathiTrust)
• Nonlinear transient analysis of multi-mass flexible rotors : theory and applications (National Aeronautics and Space Administration ;, 1973), by R. Gordon Kirk, Edgar J. Gunter, Lewis Research Center, and University of Virginia (page images at HathiTrust)
• Performance of an optimized rotor blade at off-design flight conditions (National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division ;, 1990), by Aditi Chattopadhyay, Langley Research Center, and Inc Analytical Services & Materials (page images at HathiTrust)
• An enhanced integrated aerodynamic load/dynamic optimization procedure for helicopter rotor blades (National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division ;, 1990), by Aditi Chattopadhyay, Y. Danny Chiu, Langley Research Center, Lockheed Engineering & Sciences Company, and Inc Analytical Services & Materials (page images at HathiTrust)

• Main rotor free wake geometry effects on blade air loads and response for helicopters in steady maneuvers (National Aeronautics and Space Administration ;, 1972), by S. Gene Sadler, Langley Research Center, and Rochester Applied Sciences Associates (page images at HathiTrust)
• Application of the ONERA model of dynamic stall (National Aeronautics and Space Administration, Scientific and Technical Information Branch ;, 1984), by Kenneth W. McAlister, D. Petot, O. Lambert, and Aeromechanics Laboratory (page images at HathiTrust)
• The vortex lattice method for the rotor-vortex interaction problem (National Aeronautics and Space Administration ;, 1974), by Raghuveera Padakannaya, Langley Research Center, and Pennsylvania State University (page images at HathiTrust)
• Unsteady subsonic and transonic potential flow over helicopter rotor blades (National Aeronautics and Space Administration ;, 1974), by Morris P. Isom, Ames Research Center, and Polytechnic Institute of New York (page images at HathiTrust)
• Sensitivity analysis of torsional vibration characteristics of helicopter rotor blades (National Aeronautics and Space Administration ;, 1974), by Theodore Bratanow, Akin Ecer, Langley Research Center, and University of Wisconsin--Milwaukee (page images at HathiTrust)
• Numerical simulation and comparison of symmetrical/supercritical airfoils for the near tip region of a helicopter in forward flight (National Aeronautics and Space Administration, Scientific and Technical Information Division ;, 1989), by F. F. Badavi and Langley Research Center (page images at HathiTrust)
• Response of a helicopter rotor to an increase in collective pitch for the case of vertical flight (National Aeronautics and Space Administration, 1961), by Jean Rebont, Jean Soulez-Larivière, and Jacques Valensi (page images at HathiTrust)
• Flapping response characteristics of hingeless rotor blades by a generalized harmonic balance method (National Aeronautics and Space Administration ;, 1975), by D. A. Peters, Robert A. Ormiston, U.S. Army Air Mobility Research and Development Laboratory, and Ames Research Center (page images at HathiTrust)
• An analytical evaluation of airfoil sections for helicopter rotor applications (National Aeronautics and Space Administration ;, 1975), by Gene J. Bingham and Langley Research Center (page images at HathiTrust)

Items below (if any) are from related and broader terms.

• Summary of studies of helicopter rotor icing. (Cornell Aeronautical Laboratory, 1959), by George E. Bartlett (page images at HathiTrust)
• Investigation of helicopter rotor blade flutter and flapwise bending response in hovering (Wright-Patterson Air Force Base, Ohio : Wright Air Development Center, Air Research and Development Command, United States Air Force, 1959., 1959), by Frank A. DuWaldt, R. A. Piziali, C. A. Gates, Wright Air Development Center, Cornell Aeronautical Laboratory, and United States. Air Force. Air Research and Development Command (page images at HathiTrust)
• Aerodynamic characteristics of helicopter rotors; rotor contributions to helicopter stability parameters (Princeton University [Dept. of Aeronautical Engineering], 1963), by Edward Seckel and H. C. Curtiss (page images at HathiTrust)
• Development of a method for predicting the performance and stresses of VTOL-type propellers. (U.S.Army Aviation Materiel Laboratories, 1966), by Andrew Richard Trenka and Cornell Aeronautical Laboratory (page images at HathiTrust)
• A method for predicting the aerodynamic loads and dynamic response of the rotor blades of a tandem-rotor helicopter. (U.S. Army Aviation Materiel Laboratories, 1967), by John C. Balcerak (page images at HathiTrust)
• Theory of the lifting airscrew = Teoriya nesushchego vinta (U.S. National Aeronautics and Space Administration ;, 1976) (page images at HathiTrust)
• Effects of primary rotor parameters on flapping dynamics (National Aeronautics and Space Administration, Scientific and Technical Information Office ;, 1980), by Robert T. N. Chen, Ames Research Center, and United States. National Aeronautics and Space Administration. Scientific and Technical Information Office (page images at HathiTrust)
• Control of helicopter rotorblade aerodynamics (National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Program ;, 1991), by James A. Fabunmi, AEDAR Corporation, and Ames Research Center (page images at HathiTrust)
• Rotorcraft flight-propulsion control integration : an eclectic design concept (National Aeronautics and Space Administration, Scientific and Technical Information Division ;, 1988), by James R. Mihaloew, D. C. G. Ruttledge, Mark G. Ballin, and Lewis Research Center (page images at HathiTrust)
• The effects of structural flap-lag and pitch-lag coupling on soft inplane hingeless rotor stability in hover (National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division ;, 1990), by William G. Bousman, United States. Army Aviation Research and Technology Activity, and Ames Research Center (page images at HathiTrust)
• Wake geometry effects on rotor blade-vortex interaction noise directivity (National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division ;, 1990), by R. M. Martin and Langley Research Center (page images at HathiTrust)
• A Synchronous strobed laser light sheet for rotor flow visualization (National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division ;, 1991), by Bradley D. Leighty and Langley Research Center (page images at HathiTrust)
• Low-speed aerodynamic characteristics of airfoil sections with rounded trailing edges in forward and reverse flow (National Aeronautics and Space Administration ;, 1974), by William D. Beasley, Robert J. McGhee, and Langley Research Center (page images at HathiTrust)
• Development and validation of a combined rotor-fuselage induced flow-field computational method (National Aeronautics and Space Administration, Scientific and Technical Information Office ;, 1980), by Carl E. Freeman, Army Research and Technology Laboratories (U.S.). Structures Laboratory, Langley Research Center, and United States. National Aeronautics and Space Administration. Scientific and Technical Information Office (page images at HathiTrust)
• Thermal analysis of a planetary transmission with spherical roller bearings operating after complete loss of oil (National Aeronautics and Space Administration, Scientific and Technical Information Branch ;, 1984), by Harold H. Coe and United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch (page images at HathiTrust)
• Calculation of three-dimensional unsteady transonic flows past helicopter blades (National Aeronautics and Space Administration, Scientific and Technical Information Branch ;, 1980), by J. J. Chattot, Aeromechanics Laboratory, and United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch (page images at HathiTrust)
• Performance testing of a main rotor system for a utility helicopter at 1/4 scale (National Aeronautics and Space Administration, Scientific and Technical Information Branch ;, 1982), by John D. Berry, Army Research and Technology Laboratories (U.S.). Structures Laboratory, and United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch (page images at HathiTrust)
• Effect of blade planform variation on the forward-flight performance of small-scale rotors (National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Program, 1992), by Kevin W. Noonan and United States. Army. Aeroflightdynamics Directorate (page images at HathiTrust)
• Experimental evaluation of a flat wake theory for predicting rotor inflow-wake velocities (National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Program, 1992), by John C. Wilson and United States. Army. Aeroflightdynamics Directorate (page images at HathiTrust)
• Effect of rotor wake on aerodynamic characteristics of a 1/6-scale model of the rotor systems research aircraft (National Aeronautics and Space Administration ;, 1977), by Raymond E. Mineck and United States National Aeronautics and Space Administration (page images at HathiTrust)
• Tail contribution to the directional aerodynamic characteristics of a 1/6-scale model of the rotor systems research aircraft with a tail rotor (National Aeronautics and Space Administration ;, 1977), by Raymond E. Mineck and United States National Aeronautics and Space Administration (page images at HathiTrust)
• Effect of blade planform variation on a small-scale hovering rotor (National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division ;, 1990), by Susan L. Althoff, Kevin W. Noonan, and United States. Army Aerostructures Directorate (page images at HathiTrust)
• Wind-tunnel tests of wide-chord teetering rotors with and without outboard flapping hinges (National Aeronautics and Space Administration, Scientific and Technical Information Office ;, 1977), by William H. Weller, Bill L. Lee, and United States. National Aeronautics and Space Administration. Scientific and Technical Information Office (page images at HathiTrust)
• Aerodynamic performance of a 0.27-scale model of an AH-64 helicopter with baseline and alternate rotor blade sets (National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division ;, 1990), by Henry L. Kelley and United States. Army Aerostructures Directorate (page images at HathiTrust)
• Wind-tunnel survey of an oscillating flow field for application to model helicopter rotor testing (National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division ;, 1990), by Paul H. Mirick, William T. Yeager, M-Nabil H. Hamouda, United States. Army Aerostructures Directorate, and Langley Research Center (page images at HathiTrust)
• Low-speed wind-tunnel test of an unpowered high-speed stoppable rotor concept in fixed-wing mode (National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division ;, 1991), by Michael B. Lance, Robert H. Stroub, Daniel Y. Sung, and Langley Research Center (page images at HathiTrust)
• Numerical analysis of the first static calibration of the RSRA helicopter active-isolator rotor balance system (National Aeronautics and Space Administration, Scientific and Technical Information Branch ;, 1985), by C. W. Acree and Ames Research Center (page images at HathiTrust)
• Wind-tunnel evaluation of an advanced main-rotor blade design for a utility-class helicopter (National Aeronautics and Space Administration, Scientific and Technical Information Office ;, 1987), by William T. Yeager and United States. Army. Aerostructures Directorate (page images at HathiTrust)
• An analysis of the gust-inducesd overspeed trends of helicopter rotors (National Aeronautics and Space Administration, Scientific and Technical Information Office ;, 1978), by Julian L. Jenkins, William T. Yeager, and United States. National Aeronautics and Space Administration. Scientific and Technical Information Office (page images at HathiTrust)
• Wind-tunnel investigation of the effects of blade tip geometry on the interaction of torsional loads and performance for an articulated helicopter rotor (National Aeronautics and Space Administration, Scientific and Technical Information Branch ;, 1981), by William T. Yeager, Wayne R. Mantay, Langley Research Center, Army Research and Technology Laboratories (U.S.). Structures Laboratory, and United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch (page images at HathiTrust)
• The vibration characteristics of a coupled helicopter rotor-fuselage by a finite element analysis (National Aeronautics and Space Administration, Scientific and Technical Information Branch ;, 1983), by Michael J. Rutkowski and United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch (page images at HathiTrust)
• Aerodynamic characteristics of two rotorcraft airfoils designed for application to the inboard region of a main rotor blade (National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division ;, 1990), by Kevin W. Noonan and United States. Army Aerostructures Directorate (page images at HathiTrust)
• A new methodology for free wake analysis using curved vortex elements (National Aeronautics and Space Administration, Scientific and Technical Information Division, 1987), by Donald B. Bliss, Todd R. Quackenbush, Milton E. Teske, and Ames Research Center (page images at HathiTrust)
• A full potential flow analysis with realistic wake influence for helicopter rotor airload prediction (National Aeronautics and Space Administration, Scientific and Technical Information Branch ;, 1987), by T. Alan Egolf and S. Patrick Sparks (page images at HathiTrust)
• Analytical investigation of the effects of blade flexibility, unsteady aerodynamics, and variable inflow on helicopter rotor stall characteristics (National Aeronautics and Space Administration, 1971), by E. D. Bellnger, United States National Aeronautics and Space Administration, United Aircraft Corporation. Research Laboratories, and Langley Research Center (page images at HathiTrust)
• Estimating rotary wing performance ... (National Aeronautics and Space Administration, 1964), by Watson H. Tanner, United Aircraft Corporation, and United States National Aeronautics and Space Administration (page images at HathiTrust)
• A method for analyzing the aeroelastic stability of a helicopter rotor in forward flight (National Aeronautics and Space Administration ;, 1969), by Peter Crimi, Applied Science Associates, and Langley Research Center (page images at HathiTrust)
• Determination of rotor harmonic blade loads from acoustic measurements (National Aeronautics and Space Administration ;, 1975), by Peter K. Kasper, U.S. Army Air Mobility Research and Development Laboratory, Langley Research Center, and Wyle Laboratories (page images at HathiTrust)
• Aeorelastic analysis for helicopter rotor blades with time-variable, nonlinear structural twist and multiple structural redundancy-mathematical derivation and program user's manual (National Aeronautics and Space Administration ;, 1976), by Richard L. Bielawa, United Technologies Research Center, United States National Aeronautics and Space Administration, Langley Research Center, and U.S. Army Air Mobility Research and Development Laboratory (page images at HathiTrust)
• Wind tunnel simulation of full scale vortices (National Aeronautics and Space Administration ;, 1973), by James B. Rorke, Robert C. Moffitt, Langley Research Center, and United Aircraft Corporation. Sikorsky Aircraft Division (page images at HathiTrust)
• Noise of a model helicopter rotor due to ingestion of turbulence (National Aeronautics and Space Administration, Scientific and Technical Information Branch ;, 1979), by Robert W. Paterson, Roy K. Amiet, Langley Research Center, and United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch (page images at HathiTrust)
• Analysis of helicopter maneuver-loads and rotor-loads flight-test data (National Aeronautics and Space Administration ;, 1973), by Edward A. Beno, Langley Research Center, and United Aircraft Corporation. Sikorsky Aircraft Division (page images at HathiTrust)
• An experimental investigation of vortex stability, tip shapes, compressibility, and noise for hovering model rotors (National Aeronautics and Space Administration ;, 1973), by James L. Tangler, Stan J. Miley, Robert M. Wohlfeld, Langley Research Center, and Bell Helicopter Company (page images at HathiTrust)
• Application of higher harmonic blade feathering on the OH-6A helicopter for vibration reduction (National Aeronautics and Space Administration, Scientific and Technical Information Branch ;, 1986), by F. K. Straub, E. V. Byrns, United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch, Langley Research Center, and McDonnell Douglas Helicopter Company (page images at HathiTrust)
• A momentum analysis of helicopters and autogyros in inclined descent, with comments on operational restrictions (National Aeronautics and Space Administration ;, 1975), by Harry H. Heyson and Langley Research Center (page images at HathiTrust)
• NASA TN D-2462 (National Aeronautics and Space Administration :, 1964), by George E. Sweet, Matthew M. Winston, Julian L. Jenkins, United States National Aeronautics and Space Administration, and Langley Research Center (page images at HathiTrust; US access only)
• Wind-tunnel study of the response in lift of a rotor to an increase in collective pitch in the case of vertical flight near the autorotative regime (National Aeronautics and Space Administration, 1960), by Jean Rebont, Jean Soulez-Larivière, and Jacques Valensi (page images at HathiTrust)
• Response of rotor lift to an increase in collective pitch in the case of descending flight, the regime of the rotor being near autorotation (National Aeronautics and Space Administration, 1960), by Jean Rebont, Jean Soulez-Larivière, and Jacques Valensi (page images at HathiTrust)
• Comparison of three methods for calculation of helicopter rotor blade loading and stresses due to stall (National Aeronautics and Space Administration ;, 1974), by Wayne Johnson, U.S. Army Air Mobility Research and Development Laboratory, and Ames Research Center (page images at HathiTrust)
• Correlation of full-scale helicopter rotor performance in air with model-scale freon data (National Aeronautics and Space Administration ;, 1976), by William T. Yeager, Wayne R. Mantay, and United States National Aeronautics and Space Administration (page images at HathiTrust)
• Airframe, wing, and tail aerodynamic characteristics of a 1/6-scale model of the rotor systems research aircraft with the rotors removed (National Aeronautics and Space Administration ;, 1977), by Raymond E. Mineck, Carl E. Freeman, and United States National Aeronautics and Space Administration (page images at HathiTrust)
• NASA TN D-5410 (National Aeronautics and Space Administration ;, 1969), by John F. Ward, Langley Research Center, and United States National Aeronautics and Space Administration (page images at HathiTrust)
• NASA TN D-5602 (National Aeronautics and Space Administration ; [For sale for Federal Scientific and Technical Information, Springfield, Virginia 22151], 1970), by Julian L. Jenkins, Perry L. Deal, Langley Research Center, and United States National Aeronautics and Space Administration (page images at HathiTrust)
• Further analysis of broadband noise measurements for a rotating blade operating with and without its shed wake blown downstream (National Aeronautics and Space Administration ;, 1974), by James Scheiman and Langley Research Center (page images at HathiTrust)
• Helicopter rotor rotational noise predictions based on measured high-frequency blade loads (National Aeronautics and Space Administration ;, 1974), by Robert N. Hosier, Ramani Ramakrishnan, and Langley Research Center (page images at HathiTrust)
• Load and stability measurements on a soft-inplane rotor system incorparting elsatomeric lead-lag dampers (National Aeronautics and Space Administration ;, 1977), by William H. Weller, U.S. Army Air Mobility Research and Development Laboratory, and United States National Aeronautics and Space Administration (page images at HathiTrust)
• Normal component of induced velocity in the vicinity of a lifting rotor with a nonuniform disk loading (National Advisory Committee for Aeronautics, 1956), by Harry H. Heyson, S. Katzoff, and United States National Advisory Committee for Aeronautics (page images at HathiTrust)
• A study of the torque equilibrium of an autogiro rotor (1938), by F. J. Bailey and Langley Aeronautical Laboratory (page images at HathiTrust)
• Theory of self-excited mechanical oscillations of helicopter rotors with hinged blades (U.S. Government Printing Office, 1958), by Robert F. Coleman, Arnold M. Feingold, and United States National Advisory Committee for Aeronautics (page images at HathiTrust)
• A method for assessing the impact of wake vortices of USAF operations (Wright-Patterson Air Force Base, Ohio : Air Force Flight Dynamics Laboratory, Air Force Wright Aeronautical Laboratories. Air Force Systems Command, United States Air Force, 1979., 1979), by George Kurylowich, Air Force Flight Dynamics Laboratory (U.S.), and United States. Air Force. Systems Command (page images at HathiTrust)
• Study of helicopter rotor-rotor interference effects on hub vibration (Wright-Patterson Air Force Base, Ohio : Flight Dynamics Laboratory, Aeronautical Systems Division, Air Force Systems Command, United States Air Force, 1962., 1962), by Jean Fernand Duvivier and United States. Air Force. Systems Command. Aeronautical Systems Division (page images at HathiTrust)
• Helicopter-type rotor decelerators (Wright-Patterson Air Force Base, Ohio : Aerodynamic Design Branch, Flight Dynamics Division, Directorate of Defense and Transport Systems Engineering, Aeronautical Systems Division, AIr Force Systems Command, United States Air Force, 1963., 1963), by R. R. Tyndall, Air Force Materials Laboratory (U.S.), and United States. Air Force. Systems Command. Aeronautical Systems Division (page images at HathiTrust)
• Investigation of helicopter control loads induced by stall flutter (Fort Eustis, Virginia : U.S. Army Aviation Materiel Laboratories, 1970., 1970), by P. J. Arcidiacono, H. L. Elman, L. M. Casellini, F. O. Carta, U.S. Army Aviation Materiel Laboratories, and United Aircraft Corporation. Sikorsky Aircraft Division (page images at HathiTrust)
• Investigation of the dissipation of the tip vortex of a rotor blade by mass injection (Fort Eustis, Virginia : Eustis Directorate, U.S. Army Air Mobility Research and Development Laboratory, 1972., 1972), by Richard P. White, John C. Balcerak, U.S. Army Air Mobility Research and Development Laboratory. Eustis Directorate, and Rochester Applied Sciences Associates (page images at HathiTrust)
• Prediction of rotor instability at high forward speeds (Fort Eustis, Virginia : U.S. Army Aviation Materiel Laboratories, 1969., 1969), by U.S. Army Aviation Materiel Laboratories and United Aircraft Corporation. Sikorsky Aircraft Division (page images at HathiTrust)

More items available under broader and related terms at left.