Download or read book Ground Effects on V STOL and STOL Aircraft A Survey written by and published by . This book was released on 1985 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recommendations for Ground Effects Research for V STOL and STOL Aircraft and Associated Equipment for Large Scale Testing written by and published by . This book was released on 1986 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ground Interference Effects written by Robert O. Schade and published by . This book was released on 1961 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study has been made to determine the basic phenomena associated with the ground interference effects for VTOL aircraft in an attempt to arrive at some generalized conclusions regarding the effect of the ground on the various types of VTOL aircraft. The results showed that helicopter and other rotor aircraft generally experience favorable ground effect. In the case of propeller VTOL aircraft the tilt-wing configurations will usually experience a small favorable ground effect. For the deflected-slipstream configurations a large detrimental ground effect is experienced at low angles of the thrust axis but little or no ground effect is experienced at angles of 25 degrees or 30 degrees. For buried-fan and jet configurations the ground effect can be favorable or unfavorable depending upon the geometry of the fans or jets and the airframe. For single-jet configurations the ground effects are detrimental and cannot be eliminated by fixes on the airplane. For these cases, a perforated landing platform appears to offer promise as a means of minimizing the adverse ground effect. Ground effects experienced in hovering flight tend to decrease with increasing forward speed and are rather small at airspeeds that might be of interest for STOL operation of the various VTOL configurations. The qualitative predictions of the ground effect for various VTOL aircraft configurations can be made with a fair degree of confidence, but it appears at the present time that the magnitude of the effect for specific configurations will usually have to be obtained from test data.
Download or read book STOL Aircraft Transient Ground Effects Part 1 Fundamental Analytical Study written by and published by . This book was released on 1975 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book V STOL Wind tunnel Testing written by and published by . This book was released on 1984 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ground Effects on Single and Multiple jet VTOL Models at Transition Speeds Over Stationary and Moving Ground Planes vertical Take off and Landing written by Raymond D. Vogler and published by . This book was released on 1966 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Damage Incurred on a Tilt wing Multi propeller VTOL STOL Aircraft Operating Over a Level Gravel covered Surface written by Robert J. Pegg and published by . This book was released on 1960 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Theoretical Study of Conditions Limiting V STOL Testing in Wind Tunnels with Solid Floor written by Harry H. Heyson and published by . This book was released on 1970 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: Under sufficiently large wake deflections, the forward portion of the wake is found to flow forward along the floor leading to a vortex pattern which results in Rae's limits (Journal of Aircraft, May-June 1967). Although wind-tunnel data cannot normally be corrected successfully beyond these limits, it may be possible to obtain ground-effect data for conditions more severe than those implied by Rae.
Download or read book Investigation of Ground Effects on Large and Small Scale Models of a Three Fan V STOL Aircraft Configuration written by and published by . This book was released on 1979 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of a Workshop on V STOL Aircraft Aerodynamics written by and published by . This book was released on 1979 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1987 with total page 1124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Small scale Experiments in STOVL Ground Effects written by and published by . This book was released on 1991 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Jet Induced Ground Effects on a Parametric Flat Plate Model in Hover written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-25 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: The jet-induced forces generated on short takeoff and vertical landing (STOVL) aircraft when in close proximity to the ground can have a significant effect on aircraft performance. Therefore, accurate predictions of these aerodynamic characteristics are highly desirable. Empirical procedures for estimating jet-induced forces during the vertical/short takeoff and landing (V/STOL) portions of the flight envelope are currently limited in accuracy. The jet-induced force data presented significantly add to the current STOVL configurations data base. Further development of empirical prediction methods for jet-induced forces, to provide more configuration diversity and improved overall accuracy, depends on the viability of this STOVL data base. The data base may also be used to validate computational fluid dynamics (CFD) analysis codes. The hover data obtained at the NASA Ames Jet Calibration and Hover Test (JCAHT) facility for a parametric flat-plate model is presented. The model tested was designed to allow variations in the planform aspect ratio, number of jets, nozzle shape, and jet location. There were 31 different planform/nozzle configurations tested. Each configuration had numerous pressure taps installed to measure the pressures on the undersurface of the model. All pressure data along with the balance jet-induced lift and pitching-moment increments are tabulated. For selected runs, pressure data are presented in the form of contour plots that show lines of constant pressure coefficient on the model undersurface. Nozzle-thrust calibrations and jet flow-pressure survey information are also provided. Wardwell, Douglas A. and Hange, Craig E. and Kuhn, Richard E. and Stewart, Vearl R. Ames Research Center NASA-TM-104001, A-93040, NAS 1.15:104001 RTOP 505-68-32...
Download or read book Structural loads Surveys on Two Tilt wing VTOL Configurations written by John F. Ward and published by . This book was released on 1961 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book V STOL Concepts in the United States Past Present and Future written by and published by . This book was released on 1984 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 912 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research and Technology Program Digest written by United States. National Aeronautics and Space Administration and published by . This book was released on with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt:
