The Effects of Shielding the Tips of Airfoils (1925)
NASA Technical Reports Server (NTRS) · leaf 6
RONAUTICS The localized washout gave no })r()mise of iinpi-ovement, so the construction of an airfoil model of this kind was eliminated from the program. However, as the end-plate combination had improved the fiat-plate characteristics considerably, it was decided to subject this device to a very… … such that its induced drag never became large. To the tips of this airfoil, then, disks of 4 in. diameter were attached. They were made from re in. sheet aluminum and shaped as zones of a large diameter sphere. Figure 2 is a photo- graph of the combination ready for test. In an effort to reduce the…
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