Transonic-flutter investigation of wings attached to two low-acceleration rocket-propelled vehicles

Reginald R. Lundstrom, WIlliam T. Lauten, Jr., Ellwyn E. Angle
naca-rm-l8i30
Nov 1948


Two low-acceleration transonic-flutter vehicles were launched and flown. The first carried two test wings, one of which fluttered at M = 0.92 at a frequency of 61.4 cycles per second. The reference flutter speed determined from two-dimensional theory for an unswept wing in incompressible flow is conservative when compared to the experimental flutter speed. The second vehicle carried two test wings, one of which failed at M = 0.71 because of low-frequency divergent oscillation. Since this failure was not caused by conventional flexure-torsion flutter, no comparison with a reference flutter speed can be made.

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