lses ofthe same period as thenatural period of the• pendulum is a case ofdynamical instability.Nevertheless, a pendu-lum is always staticallystable. Before proceedingwith a study of longi-tudinal and lateral stability, it may be advisable to define thevarious oscillations common to an aeroplane.… … riQ. 36. STABILITY OF AN AEEOPLANE. 75 The following nomenclature has been adopted at the NationalPhysical Laboratory :— Table III. Transla- Rota- Name of Name of Symbol tional tional Force Symbol Motion for Symbol Axis. ATi!< Velocity Velocity Acting of which Angle of along about along the…
Airplanes
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