The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 06, 1977
Filed:
Oct. 28, 1975
Alankar Gupta, Renton, WA (US);
Delmar M Fadden, Hampton, VA (US);
The Boeing Company, Seattle, WA (US);
Abstract
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.