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US 4,061,996 AGranted
Status monitoring apparatus for BLC systems
AssigneeThe Boeing Company
InventorsAlankar Gupta, Delmar M. Fadden
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AssigneeThe Boeing Company
InventorsAlankar Gupta, Delmar M. Fadden
Estimating the term…
Apparatus for monitoring the operational status of the air delivery and momentum injection subsystems of a Boundary Layer Control (BLC) system of an aircraft, by sensing an air flow parameter in the supply duct supplying air to the BLC manifold is disclosed. The air flow parameter is sensed as a ratio of two discreet pressures [stagnation/static (P.sub.T /P.sub.S) or static/static (P.sub.S1 /P.sub.S2)]. When the ratio falls outside of a predetermined range, an indication that the air delivery and momentum injection subsystem has failed is provided. The failure may be due to either a rupture or a blockage of the air delivery and momentum injection subsystem. A combined BLC status indication is provided by combining the signal related to the sensed air flow parameter with signals related to the correctness of the position of the valves controlling the bleed air flowing to the air delivery momentum and injection subsystem and the position of the high lift surfaces (e.g., flaps) of the aircraft.
In an aircraft Boundary Layer Control (BLC) system wherein engine bleed air is ducted to an air delivery and momentum injection subsystem including a BLC manifold for receiving said engine bleed air and BLC nozzle plenums connected to the manifold for directing the bleed air from the manifold to predetermined regions of a wing of the aircraft, the improvement comprising:
Dependencies are inferred from the claim text.