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spring2004_sp3

# spring2004_sp3 - Lab(S/L3 Tunnel Testing of a 3-D Wing...

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Lab (S/L3) Tunnel Testing of a 3-D Wing Unified Engineering 27 Feb 04 Learning Objectives Measure lift, drag, moment from load cell data, using reference-axis conversions Perform lift and drag predictions for a 3-D wing, and compare to measurements Use smoke visualization to see tip vortices Interpret tufts and acoustic-probe noise to detect ﬂow separation Secondary Objectives, for Flight Competition Project Get familiar with wing performance parameters for 3-D wings Get experimental data for stock Dragonﬂy wing, to serve as a baseline for redesign work Experimental Rig Test Article: Dragonﬂy wing in WBWT Instrumentation: Tunnel’s pitot-static probe Wing load cell Wing parameters: c S = 448 in 2 wing area b = 47 in wing span avg = 9 . 5 in average chord e = 0 . 95 span eﬃciency, estimated Test Conditions Nominal tunnel speeds: V = 10, 15, 20 mph Angles of attack: = 2 ± . . . 20 ± , in increments of 2 ± .

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