The Boeing Company

Other

Jonathan P Lee

Monte R Evans

Adam Marshall Thoreen

Timothy G Overton

Robert E Buchholz

Clyde L Logue

Monte R Evens

Provided are airplane trim systems and methods of controlling such systems. These systems utilize smaller portions of the stabilizer total travel range for takeoff trims, in comparison to other trim systems. A trim system described includes stabilizer and elevator, and these components are used together to achieved a takeoff total tail pitching moment. The elevator or, at least a portion of the elevator operating range, is available for flight control. As such, takeoff trim settings include stabilizer and elevator orientation settings. Addition of the elevator to control the takeoff tail pitching moment allows reducing the stabilizer total travel. The elevator orientation can be changed much faster than that of the stabilizer providing pilot more control.

Airplane takeoff trims utilizing both stabilizers and elevators

The present invention provides a method of modifying the pitch attitude of an aircraft during landing, comprising: commanding the flaps to move to a landing setting; providing a current value for a flight condition parameter; providing a current flaps setting; comparing said current value to at least one threshold value; if said current value exceeds said threshold, determining a new flaps setting capable of producing an improvement in at least one of a selected aft body contact margin and a selected nose gear contact margin for the aircraft; and adjusting the flaps to said new flaps setting.

Quiet landing attitude modifier for airplane

An add-on catalytic damper assembly is provided which is adapted to be positioned between the flue outlet pipe of a wood burning stove and the chimney pipe, and which provides catalytic combustion of the normally unburned portions of the flue gas. The assembly is of a very simple five part construction comprising upper and lower housing members adapted to be connected to the chimney and stove pipes, respectively; a plate nestingly mounted within the lower housing member and including a pair of side by side openings therein providing two paths for the flue gas; a catalytic converter mounted in one of the openings; and a damper plate mounted over the other opening and movable by means of an integral handle between blocking and unblocking positions.

Add-on catalytic damper assembly

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Everett, WA, United States of America

Jonathan P Lee