Communications: electrical – Aircraft alarm or indicating systems – Landing gear indicator
Reexamination Certificate
2007-09-25
2007-09-25
Hofsass, Jeffery (Department: 2612)
Communications: electrical
Aircraft alarm or indicating systems
Landing gear indicator
C244S10000R, C244S1020SS, C267S064260
Reexamination Certificate
active
11225224
ABSTRACT:
A system for use in monitoring, measuring, computing and displaying the initial touch-down descent velocity experienced while aircraft are executing either normal, overweight or hard landing events. Pressure sensors and motion sensors are mounted in relation to each of the landing gear struts to monitor, measure and record the impact loads and aircraft touch-down vertical velocities experienced by landing gear struts, as the aircraft landing gear initially comes into contact with the ground. Velocity adjustments are made to correct for errors caused by landing gear per-charge pressure and landing gear strut seal friction. The system also measures the landing loads experienced by each landing gear strut during the landing event and determines if aircraft limitations have been exceeded.
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