The modified-strip-analysis method of f l u t t e r prediction, which was origi n a l l y presented i n WCA Research Memorandum L57Ll0, i s reviewed briefly, some of i t s limitations are exanined, i t s relations t o some other s t r i p methods are i -I indicated, and some results of i t s use a r e shown i n comparison with experimental f l u t t e r data and with r e s u l t s of other analytical methods f o r Mach numbers up t o 15.3. The modified strip analysis i s formulated from Theodorsen's method l and employs distributions of aerodynamic parameters which may be evaluated from any suitable l i n e a r o r nonlinear steady-flow theory o r from measured steadyflow load distributions f o r the undeformed wing., The method has been shown t o
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