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There are a total of 30 record(s) matching your query.
Sorted by: Date Added To NTRS in Descending order
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An improved CAMRAD model for aeroelastic stability analysis of the XV-15 with advanced technology blades
Author(s): Acree, C. W., Jr.
Abstract: In pursuit of higher performance, the XV-15 Tiltrotor Research Aircraft was modified by the installation of new composite rotor blades. Initial flights with the Advanced Technology Blades (ATB's) revealed excessive rotor ...
NASA Center: Ames Research Center
Publication Year: 1993
Added to NTRS: 2005-08-25
Accession Number: 93N22486; Document ID: 19930013297; Report Number: A-92022, NAS 1.15:4448, NASA-TM-4448
Determining XV-15 aeroelastic modes from flight data with frequency-domain methods
Author(s): Acree, C. W., Jr.; Tischler, Mark B.
Abstract: The XV-15 tilt-rotor wing has six major aeroelastic modes that are close in frequency. To precisely excite individual modes during flight test, dual flaperon exciters with automatic frequency-sweep controls were installed. ...
NASA Center: Ames Research Center
Publication Year: 1993
Added to NTRS: 2005-08-25
Accession Number: 94N10935; Document ID: 19940006463; Report Number: A-91002, NAS 1.60:3330, NASA-TP-3330, USAATCOM-TR-93-A-004
Using frequency-domain methods to identify XV-15 aeroelastic modes
Author(s): Acree, C. W., Jr.; Tischler, Mark B.
Abstract: The XV-15 Tilt-Rotor wing has six major aeroelastic modes that are close in frequency. To precisely excite individual modes during flight test, dual flaperon exciters with automatic frequency-sweep controls were installed. ...
NASA Center: Ames Research Center
Publication Year: 1987
Added to NTRS: 2005-08-25
Accession Number: 88N17646; Document ID: 19880008262; Report Number: A-87364, AD-A194156, NAS 1.15:100033, NASA-TM-100033, USAAVSCOM-TR-87-A-17
Whirl Flutter Studies for a SSTOL Transport Demonstrator
Author(s): Acree, C. W., Jr.; Hoffman, Krishna
Abstract: A proposed new class of aircraft - the Advanced Theater Transport (ATT) will combine strategic range and high payload with 'Super-STOL' (short take-off and landing) capability. It is also proposed to modify a YC-15 into a ...
NASA Center: Ames Research Center
Publication Year: 2004
Added to NTRS: 2005-01-11
Document ID: 20050009924
Comparison of Full-Scale XV-15 Wind Tunnel and In-Flight Blade-Vortex Interaction Noise
Author(s): Kitaplioglu, Cahit; McCluer, M.; Acree, C. W., Jr.
Abstract: An isolated full-scale XV-15 rotor was tested in helicopter mode in the NASA Ames 80 by 120-Foot Wind Tunnel. Extensive acoustic data were obtained to define the rotor operating condition for maximum blade-vortex interaction ...
NASA Center: Ames Research Center
Publication Year: 1997
Added to NTRS: 2004-11-03
Document ID: 20020040964
Identification of 15-15 Aeroelastic Modes using Frequency-Domain Methods
Author(s): Acree, C. W., Jr.; Tischler, Mark B.
Abstract: The XV-15 Tilt-Rotor wing has six major aeroelastic modes that are close in frequency. To precisely excite individual modes during flight test, dual flaperon exciters with automatic frequency-sweep controls were installed. ...
NASA Center: Ames Research Center
Publication Year: 1988
Added to NTRS: 2004-11-03
Document ID: 19990027613
Preliminary report on in-flight measurement of rotor hub drag and lift using the RSRA
Author(s): Acree, C. W., Jr.
Abstract: The Rotor Systems Research Aircraft (RSRA) is a compound helicopter that was test flown as a fixed wing aircraft, with the main rotor blades removed and the rotor hub installed. An onboard rotor load measurement system ...
NASA Center: Ames Research Center
Publication Year: 1985
Added to NTRS: 2004-11-03
Accession Number: 86N13319; Document ID: 19860003851; Report Number: NAS 1.15:86764, NASA-TM-86764, REPT-85288
Performance of the Rotor Systems Research Aircraft calibrated rotor loads measurement system
Author(s): Acree, C. W., Jr.
Abstract: The compound Rotor Systems Research Aircraft (RSRA) is designed to make high accuracy, simultaneous measurements of all rotor forces and moments in flight. Physical calibration of the rotor force- and moment-measurement ...
NASA Center: Ames Research Center
Publication Year: 1982
Added to NTRS: 2004-11-03
Accession Number: 82A40549; Document ID: 19820057014
Effects of Rotor Design Variations on Tiltrotor Whirl-Mode Stability
Author(s): Acree, C. W., Jr.
Abstract: Ultimate tiltrotor performance is constrained by coupled wing/rotor whirl-mode aeroelastic instability. A multifaceted research effort to alleviate those constraints is currently underway at NASA Ames Research Center. Design ...
NASA Center: Ames Research Center
Publication Year: 2001
Added to NTRS: 2004-11-03
Document ID: 20010114155
In-flight measurement of rotor hub drag using the RSRA - A feasibility demonstration
Author(s): Acree, C. W., Jr.; Kufeld, Robert M.
Abstract: The Rotor Systems Research Aircraft (RSRA) is a compound helicopter that was test flown as a fixed-wing aircraft, with the main rotor blades removed and the rotor hub installed. An onboard rotor load-measurement system ...
NASA Center: Ames Research Center
Publication Year: 1985
Added to NTRS: 2004-11-03
Accession Number: 87A48967; Document ID: 19870061693
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