Textron Corporation

Sathy P Viswanathan

Wesley L Cresap

Alan W Myers

A mounting for a helicopter pylon having a plurality of resilient vertical support links (24-27) between the pylon (12) and the helicopter fuselage (13). The links have a composite spring rate for a given pylon weight which establishes a resilient support for the fuselage from the pylon at the thrust required to support said fuselage in normal flight and in which oscillatory vertical force transmitted to fuselage is minimal for acceptable static deflections of the pylon. Physical stops (24e, 24n, 24p) are operable to limit deflection between the pylon (12) and the fuselage (13) at predetermined rotor thrust above and below said normal thrust. Links (24-27) are mounted at the ends of a pair of rigid beams (20, 21 and 22, 23) which are secured at the centers thereof to opposite sides of transmission portion of the pylon (12). A vertical rigid mounting pin (24b) extends downward at the end of each beam. A hollow vertical receptacle (24a) is secured to the fuselage and is coaxial with each pin (24b) and has a reentrant bore (24h) providing a down facing shoulder (24p). A resilient body (24g) couples each pin to its receptacle. An enlarged foot (24e) on each pin operates between the fuselage (13) and shoulder (24p) to limit deflection of pylon (12) and the resilient coupling (24g).

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Bedford, TX, United States of America

Sathy P Viswanathan