초록 ▼

A pitch actuation system restraint (PASR) device that provides, inter alia, protection for the pitch actuation system of a helicopter having a main rotor assembly configured for main rotor blade folding operations. The PASR device includes permanent adapter brackets that are permanently mounted in c

A pitch actuation system restraint (PASR) device that provides, inter alia, protection for the pitch actuation system of a helicopter having a main rotor assembly configured for main rotor blade folding operations. The PASR device includes permanent adapter brackets that are permanently mounted in combination with the rotor hub arms of the main rotor assembly. The PASR device further includes a temporary adapter bracket and quick release pins for each main rotor blade to be folded. Prior to implementing blade folding operations, a temporary adapter bracket is temporarily secured in combination with the pitch control horn of each main rotor blade to be folded and the permanent adapter bracket of the adjacent rotor hub arm by means of the quick release pins. Each temporary adapter bracket and permanent adapter bracket as temporarily secured in combination functions as a rigid structural interconnection between the corresponding pitch control horn and the main rotor hub assembly that effectively locks the pitch control horn in position during blade folding operations such that displacements induced in the main rotor blade during blade folding operations cannot be coupled into the pitch actuation system.

대표청구항 ▼

In combination with a helicopter having a main rotor assembly and a pitch actuation system operatively associated with the main rotor assembly, the main rotor assembly including a main rotor hub assembly having a plurality of rotor hub arms, each rotor hub arm having a main rotor blade disposed in c

In combination with a helicopter having a main rotor assembly and a pitch actuation system operatively associated with the main rotor assembly, the main rotor assembly including a main rotor hub assembly having a plurality of rotor hub arms, each rotor hub arm having a main rotor blade disposed in combination therewith, each rotor hub arm further including a pitch control horn operatively associated in combination with the corresponding main rotor blade, a pitch actuation system restraint device for precluding displacements induced in at least one main rotor blade from being coupled into the pitch actuation system via the operatively associated pitch control horn, comprising: permanent adapter bracket means configured for mounting in permanent combination with at least one rotor hub arm, the at least one rotor hub arm being adjacent the rotor hub arm of the at least one main rotor blade; temporary adapter bracket means configured for mounting in combination with the operatively associated pitch control horn of the at least one main rotor blade, said temporary adapter bracket means being further configured for mounting in combination with said permanent adapter bracket means; and means for temporarily securing said temporary adapter bracket means in combination with said permanent adapter bracket means and the operatively associated pitch control horn of the at least one main rotor blade, respectively; said permanent adapter bracket means and said temporary adapter bracket means as temporarily secured in combination functioning as a rigid structural interconnection between the operatively associated pitch control horn of the at least one main rotor blade and the main rotor hub assembly that effectively locks the operatively associated pitch control horn in position such that displacements induced in the at least one main rotor blade are not coupled into the pitch actuation system.