Flight experience with the OGEE wing at low speed.
Flight experience with Ogee wing at low speed
DIRECTIONAL STABILITY↗
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Flight experience with the Ogee wing at low speed
Flight test of ogee wing at low speeds - flight characteristics and landing approach speed evaluation
LOW SPEED HANDLING↗
Ogee wing improves low-speed characteristics of deltas.
F5D-1 aircraft delta wing modification, describing wind tunnel and flight test results with ogee wing
LOW SPEED HANDLING↗
Application of approach speed criteria derived from closed-loop pilot-vehicle systems analyses to an Ogee wing aircraft
Approach speed criteria derived from closed loop pilot-vehicle systems analyses and applied to Ogee wing F-5 aircraft
OGEE WING↗
Flight-measured ground effect on a low-aspect- ratio Ogee wing including a comparison with wind-tunnel results
Flight measured ground effect on low-aspect-ratio Ogee wing compared with wind tunnel results
GROUND EFFECT↗
Flight investigation of the aerodynamic properties of an Ogee wing
Flight and wind tunnel tests of low speed characteristics of delta wing aircraft modified to Ogee plan form
DELTA WING↗
Aerodynamic characteristics of an ogee-wing space shuttle orbiter concept at a Mach number of 2.01
An investigation has been made at a Mach number of 2.01 to determine the effects of a flared rudder on the aerodynamic characteristics of an ogee-wing space-shuttle orbiter configuration. Also investigated were the effects of an upper-aft fuselage fairing for the orbital maneuvering system, elevon deflections, and rudder deflection on the aerodynamic characteristics of the configuration.
Putnam, L. E.↗
Recent theoretical developments and experimental studies pertinent to vortex flow aerodynamics, with a view towards design
Recent progress in a research program directed toward an improved vortex flow technology base was reviewed. Analysis methods for conical flow and analysis and design methods for nonconical flows are presented. Applications are made for a variety of planar, nonplanar, and interferring lifting surfaces. Several methods are shown to provide reasonable estimates of over-all forces and moments for simple wing planforms with the suction analogy method currently offering the most versatility for arbitrary configuration applications. For the prediction of surface loadings the free vortex sheet method being developed by Boeing is shown to have considerable promise and further development of this type of method is encouraged. A data base for ogee strake-wing configurations is summarized with an emphasis on the requirements for maximizing the interference lift. A strake planform design procedure is discussed and a first solution (gothic in planview) is integrated with a wing body. The data show the strake to exhibit expected stable vortex characteristics. It was found that, apart from increasing sweep, conically cambered delta wings developed drag levels approaching that of attached flow with increasing either the lift or the wing camber height, lastly, an approximate vortex flow design method, based on the suction analogy, is outlined and an example is given.
Lamar, J. E.↗
Supersonic aerodynamic characteristics of the North American Rockwell ATP shuttle orbiter
A wind tunnel study to determine the supersonic aerodynamic characteristics of a 0.01925-scale model of the space shuttle orbiter configuration is reported. The model consisted of a low-finess-ratio body with a blended 50 swept delta wing forming an ogee planform and a center-line-mounted vertical tail. Tests were made at Mach numbers from 1.90 to 4.63, at angles of attack from -6 to 30, at angles of sideslip of 0 and 3, and at a Reynolds number, based on body length, of 5.3x 1 million.
Ware, G. M.↗
An experimental investigation of the effect of rotor tip shape on helicopter blade-slap noise
The effect of tip-shape modification on blade-vortex interaction-induced helicopter blade-slap noise was investigated. The general rotor model system (GRMS) with a 3.148 m (10.33 ft) diameter, four-bladed fully articulated rotor was installed in the Langley V/STOL wind tunnel. The tunnel was operated in the open-throat configuration with treatment to improve the semi-anechoic characteristics of the test chamber. Based on previous investigation, four promising tips (ogee, sub-wing, 60 deg swept-tapered, and end-plate) were used along with a standard square tip as a baseline configuration. Aerodynamic and acoustical data concerning the relative applicability of the various tip configurations for blade-slap noise reduction are presented without analysis or discussion.
Hoad, D. R.↗
Wind tunnel simulation of full scale vortices
An experimental investigation has been conducted to determine the important scaling parameters for the flow in the core region of a vortex generated by a rectangular wing tip. The effect of an unconventional planform, the ogee tip, on the tip vortex is also determined. For rectangular planform wings, the measured vortex core diameter to chord ratios, peak tangential velocity ratios, and axial velocity ratios are shown to be functions only of wing lift coefficient and elapsed time from vortex formation, and appear to be independent of both Mach number and Reynolds number. The peak tangential velocities in the diffuse vortex generated by the ogee tip are only 25 percent of those in the vortex generated by the rectangular wing.
Rorke, J. B.↗
An application of the Ogee tip
Wind tunnel tests show that the aerodynamic performance of a rectangular 3-D wing is increased by changing its tip to an ogee shape. Potential gains in both cruise and climb performances for a modified Beech Baron aircraft indicate that incremental changes in performance are on the order of the data scatter associated with applied flight test techniques.
Vogel, J. M.↗
Wind tunnel simulation of full scale vortices.
An experimental investigation has been conducted to determine the important scaling parameters for the flow in the core region of a vortex generated by a rectangular wing tip. The effect of an unconventional planform, the ogee tip, on the tip vortex is also determined. Data were measured for wing pitch angles of 6 and 9 deg at Mach numbers of 0.2, 0.5, and 0.6 for Reynolds numbers ranging from 440,000 to 7,000,000 using a triaxial hot wire probe. The probe was located at 2 and 5 chordlengths downstream from the trailing edge of the 4.25 inch and 26.0 inch chord wings. For rectangular planform wings, the measured vortex core diameter to chord ratios, peak tangential velocity ratios, and axial velocity ratios are shown to be functions only of wing lift coefficient and elapsed time from vortex formation, and appear to be independent of both Mach number and Reynolds number.
Rorke, J. B.↗
Droplets Generated from a new OGEE shaped, liquid, air-shear, electrostatic nozzle
A series of experimental tests was carried out on an 'OGEE' shaped planform, liquid air-shear electrostatic nozzle. Liquid was ejected from the upper surface of the nozzle and was then dispersed and atomized efficiently by a high speed air flow passing over the nozzle and by the effect of two very strong coherent air vortices generated by the 'OGEE' shaped nozzle surface. Initial test results which are presented show the nozzle to perform far superior to a similar delta wing shaped design which is used extensively in various industries applications.
Inculet, I. I.↗
Inviscid analysis of unsteady blade tip flow correlation studies
Two computer programs, VSAERO-TS and VSAERO-H, were used for computing the unsteady subsonic aerodynamic characteristics of arbitrarily shaped wings oscillating in pitch. Program VSAERO-TS is a time-stepping analysis capable of treating large amplitude motions while program VSAERO-H uses harmonic wake and small amplitude assumptions. A comparison between the computed (VSAERO-TS and VSAERO-H) and DFVLR test results for chordwise pressure distributions for rectangular, swept, taper and ogee blade tips is presented in this report. A wide range of angles of attack (mean) from 0 to 12 deg and reduced frequencies of 0.1, 0.2 and 0.3 are covered in this report. Also, the comparison includes several spanwise stations.
Rao, B. M.↗