The Boeing Company

David Miles Huntly

Paul Robert Tretow

Sina Sam Golshany

Todd William Erickson

Adriana Willempje Blom

Sina S Golshany

Todd R Erickson

In one aspect a propulsion system comprises an engine and a drive assembly coupled to the engine, comprising a first driveshaft rotatable in a first direction about a first axis, a first fan coupled to the first driveshaft to rotate in the first direction, and a clutch assembly to selectively disengage the first fan from the first driveshaft. Other aspects may be described.

Contra-rotating open fan propulsion system

Systems and methods provide for the mitigation of vibrational forces acting on a horizontal stabilizer of an aircraft. According to one aspect, a damper is coupled to a front portion of a horizontal stabilizer to dampen vibrations in a first degree of freedom, with another damper coupled to a mounting point of the horizontal stabilizer to dampen vibrations in a second degree of freedom. The dampers may be passive, operating independently to mitigate vibrational forces, or active, applying a mitigating force to the horizontal stabilizer based on real-time or estimated vibration states.

Vibration dampening for horizontal stabilizers

Growing community of inventors

Seattle, WA, United States of America

David Miles Huntly