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A helicopter having a mast 50 which drives a rotor and which is driven from a transmission 16 has a swashplate 10 individually linked to pitch horns on each rotor blade. At least four control channels 11-15 are coupled to the swashplate. Three channels may control the attitude and position of the sw

A helicopter having a mast 50 which drives a rotor and which is driven from a transmission 16 has a swashplate 10 individually linked to pitch horns on each rotor blade. At least four control channels 11-15 are coupled to the swashplate. Three channels may control the attitude and position of the swashplate. The control channels 11-15 are actuated in response to pilot commands transmitted by means including mechanical, optical or electrical systems. A separate power unit 21-25, 31-35 supplies each control channel. Each power unit is directly driven by the transmission 16. Means 11c-15c applies control of the swashplate 10 from among the control channels 11-15.

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In a helicopter having a mast which drives a rotor and which is driven by a transmission and having a swashplate individually linked to pitch horns on each rotor blade, the improvement which comprises: (a) at least four control channels coupled to said swashplate, three of which normally control the

In a helicopter having a mast which drives a rotor and which is driven by a transmission and having a swashplate individually linked to pitch horns on each rotor blade, the improvement which comprises: (a) at least four control channels coupled to said swashplate, three of which normally control the attitude and position of said swashplate; (b) a separate unit to power each said control channel, each power unit being directly driven by said transmission and independent of every other power unit; and (c) means to apply control of said swashplate from among said control channels.