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Inertial navigation system
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Automatic erection systems
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Accelerometer
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Airspeed meter
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Improvements in and relating to gyroscopic control systems
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Non-tumbling vertical gyroscope system
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Constant speed and synchronous drive systems
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Anti-friction bearing unit
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Altitude and vertical velocity meter
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Accelerometer
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Navigational instrument
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Rotor balancer
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Gyroscope control system
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