Software development for subsonic aircraft’s longitudinal stability derivatives calculation
Nikola Maričić
Longitudinal aerodynamic
stability derivatives of subsonic general configuration aircraft can be
calculated using finite element methodology based on the Doublet Lattice Method
(DLM), the Slender Body Theory (SBT) and the Method of Images (MI). Applying
this methodology, software DERIV is developed. The results obtained using this
program is compared to NASTRAN examples HA21A and HA75H. A good agreement is
achieved between results from DERIV, NASTRAN, [5] and [6].
Key words: aerodynamics, unsteady
aerodynamics, aerodynamic derivatives, longitudinal stability, subsonic
aircraft.