## A computerized method for calculating flutter characteristics of a system characterized by two degrees of freedom |

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2x2 aerodynamic matrix ac ac a2 Aerodynamic matrix associated Angle of attack C0 IM C0 calculate flutter frequency CALL RMULL CC SOLVE center of mass center of pressure CP CP CP degrees of freedom differential segment distributed mass DIVERGENCE SPEED ee ee ee elastic axis equation FLUTTER CHARACTERISTICS flutter condition flutter determinant flutter speed frequency and flutter ft ft in./sec input IVUWd l/l l/l l/l l/l Ul Ul Langley Research Center m/sec mode shape NAM1 Namelist NASA Langley Research nouuoo oc ee ee oc oc p4 H Performing Organization plot Pylon strut quadratic formula rad./sec ro ro root locus analysis sample problem Solution Method solve any flutter SOLVE FOR ZP strain energy Structural Damping Ul l/l Ul Ul Ul l/l Ul Ul Ul values of 1/K WALPH X X X