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To view this page ensure that Adobe Flash Player version 9.0.124 or greater is installed. approved. Certain system failures (hydraulic, electrical, etc) will cause the FCs to degrade from normal control law first to alternate law and then to direct law, in which sidestick posi- tion corresponds directly with con- trol position. SFCs always operate in direct law, with the pilot using the center pedestal switches for pitch trim. If all FCs are lost the 7X will be flown in manual reversion, with electric pitch trim and rudder. While the upper main rudder of the 7X is hydraulically actuated, the lower rudder is electrically actuat- ed with high-speed electric motors. Manual reversion employs this lower rudder and is thus 100% electric. Electrical power in the 7X is thus necessary both for FBW and for its backup. At the Dassault equipment facility at Saint-Cloud I took the op- portunity to fly another 7X simula- tor, this one linked to the 7X “glob- al test bench” (GTB). The GTB has complete electrical, hydraulic and flight control systems working together. The Falcon 7X has 3 engine-driven electrical gen- erators and 2 permanent magnet generators (PMGs), which are driv- en by engines 1 and 2. The 3 engine-driven generators power MFC 1 and 2 and SFC 1 and 2 through the left and right essen- tial busses. These will be backed up by the emergency RAT generator and by the aircraft’s 2 batteries. MFC 3 and SFC 3 are each pow- ered by one of the 2 PMGs. Dassault has built significant redundancy into the 7X’s electrical system—in all there are 6 genera- tors and 2 batteries.
instructor. He flew McDonnell F4s in Vietnam.
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