The Grumman X-29

from the Virginia Tech Aircraft Design Information Sources pages

Glenn Spacht, “The Forward Swept Wing: A Unique Design Challenge,” AIAA Paper 80-1885, August 1980.

Sue B. Grafton, William P. Gilbert, Mark A. Croom, and Daniel G. Murri, “High Angle-of-Attack Charactreristics of a Forward-Swept Wing Fighter Configuration,” AIAA Paper 1982-1322, AIAA 9th Atmospheric Flight Mechanics Conference, Aug. 1982. The results from the Full Scale Wing Tunnel testing of a NASA wind tunnel model.

Jimmy Chin, Howard Berman and Jack Ellinwood, “X-29 Flight Control System Design Experiences,” AIAA Paper 82-1538, 1982.

Glenn Spacht. “X-29 Integrated Technology Demonstrator and ATF,” AIAA Paper 83-1058.

Mark Moore, and D. Frei, “X-29 Forward Swept Wing Aerodynamic Overview,” AIAA Paper 83-1834, July 1983.

K.E. Griffin and F.M. Jonas, "Wake Characteristics and Interactions of the Canard/Wing Lifting Surface Configuration of the X-29 Forward-Swept Wing Flight Demonstrator, AIAA 83-1835, AIAA Applied Aerodynamics Conf., Danvers Mass., July 1983.

D.G. Murri, M.A. Croom, and L.T. Nguyen, “High Angle-of-Attack Flight Dynamics of a Forward-Swept Wing Fighter Configuration,” AIAA Paper 83-1837, July 1983.

T.W. Putnam, “X-29 Flight Research Program,” AIAA Paper 83-268, AIAA/AHS/IES/SETP/DGLR 2nd Flight Testing Conference, Las Vegas, Nevada, Nov. 16-18, 1983

Richard Chipman, Alex Zislin and Catherine Waters, “Control of Aeroelastic Divergence,” Journal of Aircraft, Vol. 28, No. 12, Dec. 1983, pp. 1007-1013.

Daniel G. Murri, Luat T. Nguyen, and Sue B. Grafton, “Wind-Tunnel Free-Flight Investigation of a Model of a Forward-Swept-Wing Fighter Configuration,” NASA TP 2230, Feb. 1984.

Graham Warwick, “Forward-sweep technology,” FLIGHT International, 16 June 1984, pp. 1563-1568. This includes a good cutaway drawing of the X-29.

Mel Rimer, Richard Chipman and Rich Mercadante, “FDivergence/Flutter Suppression System for a Forward Swept-Wing Configuration with Wing-Mounted Stores,” Journal of Aircraft, Vol. 21, No. 8, Aug. 1984, pp. 531-638.

Terrill W. Putnam, “The X-29 Flight-Research Program,” AIAA Student Journal, Fall 1984, p. 2-12, 39. This is another good article, and includes a flight test plan, with a Gantt chart of the entire program as it was envisioned at the time.

Richard Chipman, Frank Rauch, Melvyn Rimer, Benigno Muniz, and Rodney H. Rickets, “Transonic Test of a Forward Swept Wing Configuration Exhibiting Body Freedom Flutter,” AIAA Paper 1985-0689. April 1985. This paper describes the body freedom flutter free-flight wind tunnel results for the X-29, and contains lots of references to the X-29's aeroelastic evaluation and design.

John Raha, “The Grumman X-29 Technology Demonstrator: Technology Interplay and Weight Evolution,” SAWE Paper No. 1665, May 1985.

Gadi Kaplan, “The X-29: Is it coming or going?” IEEE Spectrum, June 1985, pp. 54- 60. The emphasis here is on the flight control system design.

John Tierney, “The Real Stuff,” Science 85, September 1985, pp. 24-35. This provides a critique, including comments from Irv Culver among others.

Alex Zislin, Ed Laurie, Keith Wilkinson and R. Goldstein, “X-29 Aeroservoelastic Analysis and Ground Test Validation Procedures, AIAA Paper 85-3091”, Aircraft Design Systems and Operations Meeting, Oct. 14-16, 1985.

Stephen D. Ishmael and Ted Wierzbanowski, “X-29 Initial Flight Test Results,” AIAA Paper 85-4017, 1985. This is the flight test pilot perspective.

Doug Frei and M. Moore, “The X-29-A Unique and Innovative Aerodynamic Concept,” SAE Paper 851771, October 1985.

Mel Rimer, Richard Chipman and Rich Mercadante, “Control of a Forward-Swept-Wing Configuration Dominated by Flight Dynamic/Aeroelastic Interactions,” Journal of Guidance, Control and Dynamics, Vol. 9, No. 1, Jan-Feb. 1986, pp. 72-79.

E. Tobiason and R. McShea, “X-29 Ground and Flight Subsystem Testing,” AIAA-86-9781, AIAA/AHS/CASI/DGLR/IES/ITEA/SETP/SFTE 3rd Flight Testing Conf., April 2-4, 1986, Las Vegas, Nevada

Thomas M. Weeks, “X-29: Advanced Technology Integration for Tomorrow’s Fighter Aircraft,” AIAA-86-2613, AIAA/AHS/ASEE Aircraft Systems, Design & Technology Meeting, Oct. 20-22 1986, Dayton. OH

Glenn L. Spacht, “X-29: Managing an Integrated Advanced Technology Design,” AIAA Paper 86-2630, Oct. 1986. This is another description of the program, emphasizing the approach taken to reduce cost and risk.

Joseph Gera and John T. Bosworth, “Dynamic Stability and Handling Qualities Tests on a Highly Augmented, Statically Instable Airplane,” NASA TM 88297, August 1987.

Stephan Wilkinson, “X-29,” Air & Space, April/May 1988, pp. 60-71. Good pictures.

Mark A. Croom, Raymond D. Whipple, Daniel G. Murri, Sue B. Grafton, and David J. Fratello, “High-Alpha Flight Dynamics Research On The X-29 Configuration Using Dynamic Model Test Techniques,” SAE Paper 881420, Oct. 1988. This describes the NASA model work.

Jeffrey Bauer, David Crawford, Joseph Gera and Dominick Andrisani II, “A Real-Time Comparison of X-29A Flight Data and Simulation Data,” Journal of Aircraft, Vol. 26, No. 2, Feb. 1989, pp. 117-123.

John T. Bosworth and Timothy H. Cox, “A Design Procedure for the Handling Qualities Optimization of the X-29 Aircraft,” NASA TM 4142, 1989. (Also AIAA Paper 89-3428?)

G. Huband and W. Gillard, “X-29 High Angle-of-Attack Flight Testing-Program Status,” AIAA Paper 90-3303, Sept. 1990.

Bruce Rosen and Warren Davis, “Numerical Study of Asymmetric Air Injection to Control High Angle-of-Attack Forebody Vortices on the X-29 Aircraft,” AIAA 90-3004. AIAA Applied Aerodynamics Conference, Portland, OR. August 1990.

R. W. Guyton and G. Maerki, “X-29 Forebody Jet Blowing,” AIAA 92-0017, 30th Aerospace Sciences Meeting & Exhibit, Jan. 1992, Reno, NV

John T. Bosworth, “Linearized Aerodynamic and Control Law Models of the X-29A Airplane and Comparison With Flight Data,” NASA TM 4356, 1992.

W. Smith and P. Pellicano, “X-29 High Angle-of-Attack Military Utility Flight Test Results,” AIAA 92-4080, 6th AIAA Biennial Flight Test Conference, Aug. 24-26, 1992, Hilton Head, SC

J. Krumenacker and P. Pellicano, “Flight Simulation and Data Analysis During a High Angle of Attack Vortex Flow Control Flight Test Program,” AIAA Paper 92-4108, August 1992.

F. Luria and R. Guyton, “Flight Testing of Pneumatic Forebody Vortex Control on the X-29 Technology Demonstrator,” SAE Paper 922008, Oct. 1992.

W. Smith, “X-29 High AOA Flight Test Results: An Overview,” SAE Paper 931367, April 1993. This is a very good paper with lots of references.

Ron Tindell and W.G. Hill, Jr., “CFD Analysis of the X-29 Inlet at High Angle of Attack,” Journal of Aircraft, Vol. 30, No. 4, July-Aug. 1993, pp. 480-487.

Robert Clarke, John J. Burken, John T. Bosworth, and Jeffrey E. Bauer, “X-29 Flight Control System: Lessons Learned,” in AGARD CP-560, Active Control Technology: Applications and Lessons Learned, May 1994 (published Jan. 1995). This paper has a chart showing the max nose up and nose down pitch rate compared with the F-18, and discusses the issue of keeping an unstable airplane from pitching out of control.

Pamela J. Underwood, Lewis R. Owens, Richard A. Wahls and Susan Williams, “X-29 High Alpha Test in the National Transonic Facility,” AIAA-2003-0752, 41st AIAA Aerospace Sciences Meeting & Exhibit, Reno, NV, January 2003. This paper contains a lot of tunnel to flight comparisons.

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direct comments and suggestions to W.H. Mason, whmason@vt.edu