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Future Rotorcraft Research in the USA

Part of: The AJ Special Rotorcraft Collection

Published online by Cambridge University Press:  04 July 2016

P. F. Yaggy
P. F. Yaggy*
Affiliation:
US Army Aeronautical Research Laboratory Ames Research Center, Moffett Field, California
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Extract

Projections of future trends in any field must be somewhat subjective; this assessment of future research on rotorcraft is no exception. However, an effort has been made at objectivity by presenting results of past and current research efforts as a foundation from which the projections are made. These projected trends are solely the opinion of the author and do not represent the policy of any agency within Government or industry, nor are they committal in any sense. Although some illustrations are derived from specific systems under investigation, the general intent of the paper is to avoid discussion of systems and to present illustrations representative of basic problems in the field of rotorcraft for which research effort can be expected to yield significant advance in performance and design.

Type
Supplementary Papers
Information
The Aeronautical Journal , Volume 73 , Issue 705 , September 1969 , pp. 815 - 829
Copyright
Copyright © Royal Aeronautical Society 1969 

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References

1. McCroskey, W. J. and Yagoy, P. F. Laminar Boundary Layers on Helicopter Rotors in Forward Flight. AIAA Journal, Vol 6, No 10. October 1968.Google Scholar
2. Tanner, W. H. and Yaggy, P. F. Experimental Boundary Layer Study on Hovering Rotors. Journal of the American Helicopter Society, Vol 11. No 3. pp 22–37, July 1966.Google Scholar
3. Carta, F. O. Unsteady Normal Force on an Aerofoil in a Periodically Stalled Inlet Flow. Journal of Aircraft, Vol 4, No 5, September 1967.Google Scholar
4. Liiva, J., Davenport, F. J., Gray, L. and Walton, I. C. Two-Dimensional Tests of Airfoils Oscillating near Stall. USAAVLABS Tech Report 68-13A, April 1968.Google Scholar
5. Ham, N. D. and Garelick, M. S. Dynamic Stall Considerations in Helicopter Rotors. Journal of the American Helicopter Society, Vol 13, No 2, April 1968.Google Scholar
6. Crimi, P. Prediction of Rotor Wake Flows. CAL/USAAVLABS Symposium Proceedings on Aerodynamic Problems Associated with V/STOL Aircraft, Vol 1, June 1966.Google Scholar
7. Clark, D. R. and Leiper, A. C. The Free Wake Analysis. American Helicopter Society 25th Annual National Forum, May 1969.Google Scholar
8. Hough, G. R. and Ordway, D. E. Mean Flow Stream lines of a Finite Bladed Propeller. Journal of Aircraft, Vol 4, No 6, November-December 1967.Google Scholar
9. Greenburg, M. D. and Kaskel, A. I. Inviscid Flow Field Induced by a Rotor in Ground Effect. NASA CR-1027, May 1968.Google Scholar
10. Gray, R. B. An Aerodynamic Analysis of a Single Bladed Rotor in Hovering and Low Speed Forward Flight as Determined from the Smoke Studies of the Vorticity Distribution in the Wake. Princeton Aeronautical Engineering Department Report No 356, September 1956.Google Scholar
11. Jenney, D. S., Olsen, J. R. and Landgrebe, A. J. A Reassessment of Rotor Hovering Performance Prediction Methods. Journal of the American Helicopter Society, Vol 13, No 2, April 1968.Google Scholar
12. McCormick, B. W., Tangler, J. L. and Sherrieb, H. E. Structure of Trailing Vortices. Journal of Aircraft, Vol 5, No 3, May-June 1968.Google Scholar
13. Sternfeld, H. Jr. Influence of the Tip Vortex on Helicopter Rotor Noise. AGARD Conference Proceedings No 22, Fluid Dynamics of Rotor and Fan Supported Aircraft at Subsonic Speeds, September 1967.Google Scholar
14. Lowson, M. V. and Ollerhead, J. B. Studies of Helicopter Rotor Noise. USAAVLABS Technical Report 68-60, January 1969.Google Scholar
15. Leverton, J. W. and Taylor, F. W. Helicopter Blade Slap. Journal of Sound and Vibration, Vol 4, No 3, November 1966.Google Scholar
16. Spencer, R. H., Sternfeld, H. Jr. and McCormick, B. W. Tip Vortex Care Thickening for Application to Helicopter Noise Reduction. USAAVLABS Technical Report 66-1, September 1966.Google Scholar
17. Wortman, F. X. and Drees, J. M. Design of Airfoils for Rotors. Proceedings Third CAL/USAAVLABS Symposium, Aerodynamics of Rotary Wing and V/STOL Aircraft, Vol I, June 1969.Google Scholar
18. Blackwell, J. A. Jr. Effect of Reynolds Number and Boundary Layer Transition Location on Shock-Induced Separation. Paper presented at AGARD Specialists Meeting on Transonic Aerodynamics, Paris, September 1968.Google Scholar
19. Davenport, F. J. and Front, J. V. Airfoil Sections for Rotor Blades—A Reconsideration. American Helicopter Society 22nd Annual National Forum Proceedings, Washington, DC, May 1966, American Helicopter Society, Inc, pp 29–44, 1966.Google Scholar
20. Daughaday, H. Suppression of Transmitted Harmonic Rotor Loads by Blade Pitch Control. Journal of the American Helicopter Society, Vol 13, No 2, April 1968.Google Scholar
21. Fradenburgh, E. A. Research and Development of Advanced Rotorcraft Concepts. Paper presented at AIAA/ AHS Research Design, and Operations Meeting, Atlanta, Georgia, AIAA Paper No 69-199, February 1969.Google Scholar
22. Dorand, R. and Boehler, G. D. Application of the Jet Flap Principle to Helicopters. Journal of the American Helicopter Society, Vol 4, No 3, July 1959.Google Scholar
23. Stepniewski, W. Z. and Young, M. I. Helicopters and Propeller-Type VTOL Aircraft in the Light of Technologies. SAE Paper 650193. Presented at National Aeronautics Meeting, Washington, DC, April 1965.Google Scholar
24. Donham, R. E. and Harwick, W. P. Analyses of Stowed Rotor Aeroelastic Characteristics. Journal of the American Helicopter Society, Vol 12, No 1, January 1967.Google Scholar