Wind-tunnel investigation of control-surface characteristics XV : various contour modifications of a 0.30-airfoil-chord plain flap on an NACA 66(215)-014 airfoil

Purser, Paul E., Riebe, John M.
naca-wr-l-668
1943

(abstract not available)

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http://naca.central.cranfield.ac.uk/reports/1943/naca-wr-l-668.pdf