Theoretical and experimental results for short period stick-free dynamic stability (porpoising) are compared. Classical dynamic equations of motion were used to describe the longitudinal stability of a turboprop aircraft equipped with an all-movable servotab longitudinal control system. Flight test evidence of dynamic stick-free instability does not agree with the theoretical analysis. The effect of an additional parameter, the torsional rigidity of the servotab plane, included in the model explains the difference between theoretical and flight-test results.
Sulla Stabilita Dinamica Longituinale a Comandi Liberi di UN Velivolo Dell Aviazione Generale Con Piano di Coda Tutto Mobile (On the Stick-Free Longitudinal Dynamic Stability of a General Aviation Aircraft Equipped with an All-Movable Horizontal Tail)
1983
15 pages
Report
No indication
English
Aeroelastic behaviour on an all-movable horizontal tail of a general aviation twin-engine aircraft
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