1. Figure 3 Huangand Hanff Model Data difference to the slope of the beveled upper surface in the freestream direction when the centerline is at zero angle of attack, corresponding to a flat upper surface. The 10° beveled upper surface would attain zero angle of attack when the centerline is at 4.262°. Thus a 4° angle of attack correction due to leading-edge bevel was proposed that brought the Huang and Hanff1data into closer agreement with the predictions. The 4.26° shift has been removed from the three 1993 data points shown.
2. Gursuf (b/B=42.6, s/C=8.5) The vortex breakdown location data for this thick wing (7.6%) agrees with the Huang, Sun and Hanff14data up to 30° angle of attack then deviates upstream by 5 - 10% as vortex breakdown approaches the apex. This data does not show the upstream shift as in Pelletier's9data at the same Reynolds number and is in closer agreement with the low Reynolds number data of Huang, Sun and Hanff14. Here the effects of thickness appear negligible except when vortex breakdown is very near the apex, contrary to the 10% upstream shift found by Huang, Sun and Hanff14(wings 8 and 13) for an upper surface bevel of 10°, flat lower surface.