Bell XV-15 TRRA

 

Over twenty years after they began work on the XV-3, Bell received a contract to begin work on their 13,000 lb Research Tilt Rotor aircraft, which was designated XV-15. The 42 ft fuselage housed side-by-side pilot seats. At each tip of the 35 ft span wings, a 1,550 shp Lycoming T53-LTC1K-4K turboshaft engine powered a 25 ft diameter three-bladed rotor. The engines and rotors tilted through 90° and were cross-linked in the event of engine failure. The rotors were semi-rigid stainless steel with a high twist and no flapping hinges. Control at low speeds was by cyclic and collective blade angle adjustments.

The first hover of the joint Army/NASA XV-15 was performed on 3 May 1977. The first aircraft was later tested extensively in the wind tunnel. Aircraft number two made its first hover on 23 April 1979. It made the first conversion to horizontal flight on 24 July 1979. In the next several years, the XV-15 conducted extensive tests, shipboard landings, and achieved a maximum speed (in a dive) of 397 mph. By 1986, it had made 1,500 conversions in 530 flight hours. The aircraft was flight tested aboard the USS Wasp in 1990 to evaluate shipboard compatibility issues of the tilt rotor concept.


Ship 2 is in the Smithsonian National Air and Space Museum (Udvar-Hazy Center).

Source: AHS V/STOL Wheel

 

 

Attribution

Attribution
Overview
Parent type XV-15
Variant *No Variant assigned
Design authority Bell Helicopter Textron, Inc.
Primary manufacturer Bell Helicopter Textron, Inc.
Key Characteristics
Operational status No longer flying
Max gross weight (ground) 6,009 n/a 6,009 n/a
Crew 2
Seating arrangement Side-by-side
Configuration
VTOL type Convertiplane
Compound type N/A
Lift configuration Tilt rotor/prop
Control device type None
Features
Number of engines 2
Number of propulsors 0
Number of lift devices 2
Number of control devices 0
Milestones associated with the Bell XV-15 TRRA
1977 First flight of the NASA/Army/Bell XV-15 TRRA tilt rotor
1990 The Bell XV-15 captures five official FAI records
1990 Bell XV-15 takes a record for speed over a recognized course
1995 First tilt rotor landing at the world's first civil vertiport (Bell XV-15)
2003 Bell XV-15 completes its last research flight

Bell XV-15 TRRA

 

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Bell XV-15 TRRA

 

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Bell XV-15 TRRA

 

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Bell XV-15 TRRA

 

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Bell XV-15 TRRA

 

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Bell XV-15 TRRA

 

Operated By
National Aeronautics and Space Administration Status unknown

Bell XV-15 TRRA

 

Forum Proceedings related to the Bell XV-15 TRRA

A Comparative Analysis of XV-15 Tiltrotor Hover Test Data and WOPWOP Predictions Incorporating the Fountain Effect
Charles K. Rutledge, Lockheed Engineering and Sciences Company; Charles D. Coffen and Albert R. George, Cornell University

 

A Comparative Analysis of XV-15 Tiltrotor Hover Test Data and WOPWOP Predictions Incorporating the Fountain Effect
Charles K. Rutledge, Lockheed Engineering and Sciences Company; Charles D. Coffen and Albert R. George, Cornell University

 

A Comparative Analysis of XV-15 Tiltrotor Hover Test Data and WOPWOP Predictions Incorporating the Fountain Effect
Charles K. Rutledge, Lockheed Engineering and Sciences Company; Charles D. Coffen and Albert R. George, Cornell University

 

A Qualitative Flight Evaluation of a Sidestick Controller in the XV-15 Tiltrotor Research Aircraft
Daniel C. Dugan, NASA Ames; Gary C. Churchill, US Army AMCOM

 

Advanced Technology Blade Testing on the XV-15 Tilt Rotor Research Aircraft
Brent Wellman, NASA Ames Research Center

This paper was not submitted in time to be included in the printed Proceedings.

 

Aerodynamic Design of the XV-15 Advanced Composite Tilt Rotor Blade
M.A. McVeigh & H.J. Rosenstein, Boeing Vertol Company

 

Analysis of Measured and Predicted Acoustics from an XV-15 Flight Test
D. Douglas Boyd, Jr., NASA Langley Research Center; Casey L. Burley, NASA Langley Research Center

 

Blade-Vortex Interaction Noise of an Isolated Full-Scale XV-15 Tilt-Rotor
C. Kitaplioglu, M. Betzina, and W. Johnson, NASA Ames

 

Comparison Of Full-Scale XV-15 Blade-Vortex Interaction Noise Calculations With Wind Tunnel Data
Cahit Kitaplioglu and Wayne Johnson, NASA Ames Research Center

 

Comparison of XV-15 Full-Scale Wind Tunnel and In-Flight Blade-Vortex Interaction Noise
C. Kitaplioglu, M. McCluer, and C. W. Acree, Jr., NASA Ames Research Center

 

Design Aspects of the XV-15 Advanced Technology Blade Program
K.E. Smith, H.R. Alexander, Boeing Vertol Co. and M.D. Maisel, Aeromechanics Laboratory, AVSCOM

 

Far-Field Hover Acoustic Characteristics of the XV-15 Tiltrotor Aircraft with Advanced Technology Blades
David A. Conner, NASA Langley Research Center; Brent Wellman, NASA Ames Research Center

 

Far-Field Hover Acoustic Characteristics of the XV-15 Tiltrotor Aircraft with Advanced Technology Blades
David A. Conner, NASA Langley Research Center; Brent Wellman, NASA Ames Research Center

 

Far-Field Hover Acoustic Characteristics of the XV-15 Tiltrotor Aircraft with Advanced Technology Blades
David A. Conner and Brent Wellman, AVSCOM

 

Flight Control System Development For The XV-15 Tilt Rotor Aircraft
Roger L. Marr; J. Marvin Willis; Gary B. Churchill

 

Full-Scale Demonstration of Higher Harmonic Control for Noise and Vibration Reduction on the XV-15 Rotor
Khanh Nguyen, NASA Ames Research Center; Mark Betzina, NASA Ames Research Center; Cahit Kitaplioglu, NASA Ames Research Center

 

Handling Qualities Evaluation Of XV-15 Noise Abatement Landing Approaches Using A Flight Simulator
William A. Decker, NASA Ames Research Center

 

Handling Qualities Evaluations of the XV-15 Tilt-Rotor Aircraft
R. L. Marr, Bell Helicopter Co., G. Churchill, NASA-Ames, and W. E. B. Roderick, NRC, Canada.

 

Initial Tiltrotor Aeroacoustic Code (TRAC) Predictions For The XV-15 Flight Vehicle And Comparison With Flight Measurements
Devon S. Prichard, Lockheed Martin

 

Mission Potential Derivatives of XV-15 Tilt Rotor VTOL Research Aircraft
R.K. Wernicke & K.G. Wernicke, Bell Helicopter Textron & D.C. Borgman, USA AVRADCOM

 

Operating Flexibility Exhibited in Flight Test of the XV-15 Tilt Rotor Research Aircraft
L.G. Schroers, USA RTL Aeromechanics Lab, R.G. Erhart, Bell Helicopter, D.C. Dugan, NASA Ames & R.L. Marr, Bell Helicopter Textron

 

Performance and Safety Aspects of the XV-15 Tilt Rotor Research Aircraft
K.G. Wernicke

 

Results From An XV-15 Rotor Test In The National Full-Scale Aerodynamics Complex
Jeffrey S. Light, NASA Ames Research Center

 

Results of Structural Dynamic Testing of the XV-15 Tilt Rotor Research Aircraft
J. Bilger, R. Marr & A. Zahedi, Bell Helicopter Textron

 

Rotor Performance of an Isolated Full-Scale XV-15 Tiltrotor in Helicopter Mode
Mark D. Betzina, NASA Ames Research Center

 

Simulations of XV-15 Rotor Flows in Hover Using OVERFLOW
Seokkwan Yoon, Thomas H. Pulliam, and Neal M. Chaderjian, NASA Ames

 

Simulations of XV-15 Rotor Flows in Hover Using OVERFLOW
Seokkwan Yoon, Thomas H. Pulliam, and Neal M. Chaderjian, NASA Ames

 

Status Report on XV-15 Tilt Rotor Test Program, LTC
J.H. Brown, Jr. and H.K. Edenborough

 

The History of the XV-15 Tiltrotor Research Aircraft - From Concept to Flight
Daniel C. Dugan - NASA Ames

 

Tiltrotor Airframe and Landing Gear Development - XV-3, XV-15, 609, and Beyond
Isaac, Mark

 

Using RotCFD to Predict Isolated XV-15 Rotor Performance
Witold J.F. Koning, Cecil W. Acree (NASA Ames Research Center) and R. Ganesh Rajagopalan (Iowa State University)

 

Wake Vortex Measurements Of The XV-15 Tiltrotor Using A Mobile Ground-Based LIDAR System
John J. Schillings, Bell Helicopter Textron, Inc.; Samuel W. Ferguson, Bell Helicopter Textron, Inc.; Albert G. Brand, Bell Helicopter Textron, Inc.; B. Robert Mullins, Bell Helicopter Textron, Inc.; Justin Libby, Massachusetts Institute of Technology

 

Wind Tunnel And Flight Tests Of The XV-15 Tilt Rotor Research Aircraft

J.A. Weiberg, L.G. Schroers, NASA Ames Research Center & R.L. Marr, S Blackman, Bell Helicopter Textron

 

XV-15 Shipboard Evaluation
J.C. Ball, U.S. Naval Air Test Center

 

XV-15 Tiltrotor Low Noise Approach Operations
David A. Conner, Langley Research Center; Michael A. Marcolini, NASA Langley Research Center; William A. Decker, NASA Langley Research Center; John H. Cline, Langley Research Center; Bryan D. Edwards, Bell Helicopter Textron, Inc.; Colby O. Nicks, Bell Helicopter Textron, Inc.; Peter D. Klein, Bell Helicopter Textron, Inc.

 

XV-15 Tiltrotor Low Noise Terminal Area Operations
David A. Conner, U. S. Army; Michael A. Marcolini, NASA Langley Research Center; Bryan D. Edwards and John T. Brieger, Bell Helicopter Textron, Inc.

 

 

Vertiflite articles related to the Bell XV-15

Vertiflite, July/August 1986

Taking New York By Storm - The XV-15 -

 

Vertiflite, March/April 1984

XV-15, Avionics and Deicing Head AVSCOM Studies -

 

Vertiflite, November/December 1984

The 1984 XV-15 Victory Tour -

 

Vertiflite, September/October 1982

XV-15 Program Update -

 

 

Articles from the Journal of the American Helicopter Society related to the Bell XV-15

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Articles from NASA Technical Reports Server related to the Bell XV-15

 

Patent information from the US Patent and Trademark Office related to the Bell XV-15

 

Google Books related to the Bell XV-15

Bell XV-15 TRRA

 

Overview

 

 

Main rotor

 

 

Bell XV-15 TRRA

Aircraft Notes

Ref. Author(s) Title Source Date Type
2 Maisel M. D., Giulianetti, D. J., Dugan, D. C. The History of the XV-15 Tilt Rotor Research Aircraft NASA SP-2000-4517, Monographs in Aerospace History # 17, The NASA Histories Series, National Aeronautics and Space Administration, Office of Policy and Plans, NASA History Division, Washington D.C. 2000 Website
  Very comprehensive and detailed report including dimensions, powerplant and performance. Also covers the design and development history of earlier tilt rotor projects.
2 Maisel M. D., Giulianetti, D. J., Dugan, D. C. The History of the XV-15 Tilt Rotor Research Aircraft NASA SP-2000-4517, Monographs in Aerospace History # 17, The NASA Histories Series, National Aeronautics and Space Administration, Office of Policy and Plans, NASA History Division, Washington D.C. 2000 Website
  Very comprehensive and detailed report including dimensions, powerplant and performance. Also covers the design and development history of earlier tilt rotor projects.