Abstract

The results of a study conducted to determine criteria for predicting loss-of-control characteristics at near-stall angles of attack based on lateral-directional static stability parameters are presented. The Cn0,dynamic and aileron-alone divergence parameters are calculated for variations in lateral-directional static stability and departure characteristics, as predicted by these parameters, are then correlated with high angle-of-attack stability and control characteristics determined from model and full-scale flight tests. Results of this limited correlation indicate that the Cnp,dynamic and aileron-alone divergence parameters are promising as a preliminary criteria for predicting departure characteristics at near-stall angles of attack as well as spin susceptibility.

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