Articulated drive
Articulating/telescoping duct for reaction drive helicopters
Attitude synchronization for model following control systems
Autogyro aircraft
Autogyro having blade tip jets
Autogyro with auxiliary rotor drive
Automatic approach to hover system
Automatic control device for a helicopter and automatic...
Automatic flight control means for rotary wing aircraft
Automatic flight control means for rotary wing aircraft having a
Automatic flight control system
Automatic gain control for stability augmentation systems
Automatic heading synchronization control system
Automatic one-per-rev control system
Automatic turn coordination trim control for rotary wing aircraf