Simulation Study of an Automatic Trim System for Reducing the Control Forces on a Light Twin After an Engine Failure 850913
An automatic trim system for reducing the control forces after an engine failure on a light twin has been investigated on the Langley General Aviation Simulator. The system schedules open-loop trim tab deflections as a function of differential propeller slipstream dynamic pressure and freestream dynamic pressure. The system is described and the airplane-system static and dynamic characteristics are documented. Three NASA research pilots evaluated the effectiveness of the system for takeoff and landing maneuvers. A variety of off-nominal system characteristics were studied. The system was judged to be generally beneficial, providing a 2 to 3 point improvement in pilot rating for the tasks used in the evaluations.
Citation: Stewart, E. and Brown, P., "Simulation Study of an Automatic Trim System for Reducing the Control Forces on a Light Twin After an Engine Failure," SAE Technical Paper 850913, 1985, https://doi.org/10.4271/850913. Download Citation
Eric C. Stewart, Philip W. Brown
NASA Langley Research Center
General Aviation Aircraft Meeting and Exposition