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considerations of some JET-DEFLECTION PRINCIPLES for - - directional control - - lift
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Abstract
THE performance characteristics of various devices applicable for jet directional control, lift augmentation, and VTOL-STOL studied at the NACA Lewis Laboratory are discussed, including jet deflection devices applicable to the conventonal round nozzle and novel nozzle configurations.
The results indicate that many of the deflection devices applicable to conventional nozzles can readily be used for directional control or lift augmentation. Other deflection devices, such as movable plug, internal flap, cylindrical thrust reverser, swiveled primary with fixed shroud, and 90 deg side-bleed nozzle, are limited in application to jet directional control or aircraft trim because the loss in axial thrust for a given deflection force is prohibitive or the maximum deflected force obtainable is limited.
The novel configurations studied consisted of an annular nozzle with the jet directed perpendicularly to the ground and a Coanda nozzle which deflects the jet over a surface attached to the nozzle.
Many of the directional control and lift augmentation devices for use with conventional nozzles can be applied directly to existing aircraft. The more bizarre deflection devices (annular and Coanda nozzles) will require novel air craft configurations in order to realize optimum performance.
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Glahn, U. and Povolny, J., "considerations of some JET-DEFLECTION PRINCIPLES for - - directional control - - lift," SAE Technical Paper 580062, 1958, https://doi.org/10.4271/580062.Also In
References
- SAE Transactions Vol. 65 1957 159 174 “Some General Considerations Concerning VTOL Aircraft,” Zimmerman. Charles H.
- Interauia, Vol. 11 January 1956 27 34 “Technical Aspects of Steep-Gradient Aircraft,” Garbell. M. A.
- “Safety Thorugh Steep Gradient Aircraft,” Woodham. R. M. Cornell-Guggenheim Aviation Safety Center, Cornell University May 1956
- “Reverse Thrust, Vertical Lift, and Jet Side Force by Means of Controlled Jet-Deflection,” Meyerhoff Leonard and Meyerhoff. Stanley Eastern Research Group January 1956
- NACA RM E55I29 1956 “Performance Characteristics of Cylindrical Target-Type Thrust Reverser,” Steffen Fred W. and McArdle. Jack G.
- NACA TN 3982 April 1957 “Exploratory Study of Ground Proximity Effects on Thrust of Annular and Circular Nozzles,” von Glahn. Uwe
- WADC-AMC, (Translation) Rept. No. F-TS-823-RE February 1948 “Method of Increasing Fluid Stream by Diverting It from Its Axis of Flow, Coanda Effect,” Metral. A. R.
- NACA TN 3364 1955 “Investigation of Effectiveness of Large-Chord Slotted Flaps in Deflecting Propeller Slipstreams Downward for Vertical Take-Off and Low-Speed Flight,” Kuhn Richard E. and Draper. John W.
- NACA TN 3693 May 1956 “Preliminary Investigation of Effectiveness of Sliding Flap in Deflecting Propeller Slipstream Downward for Vertical Take-Off,” Kuhn Richard E. and Spreemann. Kenneth P.