초록 ▼

A variable speed helicopter tilt rotor system and method for operating such a system are provided which allow the helicopter rotor to be operated at an optimal angular velocity in revolutions per minute (RPM) minimizing the power required to turn the rotor thereby resulting in helicopter performance

A variable speed helicopter tilt rotor system and method for operating such a system are provided which allow the helicopter rotor to be operated at an optimal angular velocity in revolutions per minute (RPM) minimizing the power required to turn the rotor thereby resulting in helicopter performance efficiency improvements, reduction in noise, and improvements in rotor, helicopter transmission and engine life. The system and method provide for an increase in helicopter endurance and range. The system and method also provide a substantial improvement in helicopter performance during take-off, hover and maneuver. All such improvements are valid in helicopter mode when the helicopter is supported by rotor vertical lift, in airplane mode when the helicopter is supported by wing lift and the rotor is tilted forward to provide propulsive thrust and in conversion from helicopter mode to airplane mode.

대표청구항 ▼

A variable speed helicopter tilt rotor system and method for operating such a system are provided which allow the helicopter rotor to be operated at an optimal angular velocity in revolutions per minute (RPM) minimizing the power required to turn the rotor thereby resulting in helicopter performance

A variable speed helicopter tilt rotor system and method for operating such a system are provided which allow the helicopter rotor to be operated at an optimal angular velocity in revolutions per minute (RPM) minimizing the power required to turn the rotor thereby resulting in helicopter performance efficiency improvements, reduction in noise, and improvements in rotor, helicopter transmission and engine life. The system and method provide for an increase in helicopter endurance and range. The system and method also provide a substantial improvement in helicopter performance during take-off, hover and maneuver. All such improvements are valid in helicopter mode when the helicopter is supported by rotor vertical lift, in airplane mode when the helicopter is supported by wing lift and the rotor is tilted forward to provide propulsive thrust and in conversion from helicopter mode to airplane mode. igh-density polyethylene pipe. 12. The apparatus of claim 1 wherein said second end is open. 13. A soil erosion control apparatus for use above ground, comprising: (a) a perforated hollow pipe having a first open end having a coupler attached thereto and a second end; and (b) an outer filter member surrounding said perforated hollow pipe and said coupler, wherein said outer filter member is formed from one or more materials selected from the group consisting of excelsior, straw and a porous foam material, and wherein said walled elongated core member and said outer filter member both reside above ground. 14. The apparatus of claim 13 further comprising a porous outer material surrounding said outer filter member. 15. The apparatus of claim 14 wherein said porous outer material comprises netting. 16. A soil erosion control apparatus for use above ground, comprising: (a) a first walled elongated core member having a first open end having a coupler attached thereto, a second end, an interior space and one or more openings in said wall communicating said interior space with the exterior of said core member; (b) a second walled elongated core member having a first open end having a coupler attached thereto and coupled to said coupler of said first walled core member, a second end, an interior space and one or more openings in said wall communicating said interior space with the exterior of said core member; and (c) an outer filter member surrounding said first core member, said second core member, and one or more of said couplers, wherein said outer filter member is formed from one or more materials selected from the group consisting of excelsior, straw and a porous foam material, wherein said walled elongated core members and said outer filter member all reside above ground. 17. A soil erosion control apparatus for use above ground, comprising: (a) a walled elongated core member having a first open end comprising a coupler, a second end, an interior space and one or more openings in said wall communicating said interior space with the exterior of said core member; and (b) an outer filter member surrounding said core member and said coupler, wherein said outer filter member comprises a porous foam material, and wherein said walled elongated core member and said outer filter member both reside above ground. 18. A soil erosion controlling wattle, comprising: (a) a walled elongated core member having a first open end comprising a coupler, a second end, an interior space and one or more openings in said wall communicating said interior space with the exterior of said core member; and (b) an outer filter member surrounding said core member and said coupler, said outer filter member capable of curtailing soil erosion and of passing fluid into said core member. 19. The soil erosion controlling wattle of claim 18 further comprising a second elongated core member having a first open end coupled to said coupler. 20. The soil erosion controlling wattle of claim 19 wherein said second elongated core member further comprises a coupler coupled to said coupler of said first elongated core member. 21. The soil erosion controlling wattle of claim 18 wherein said outer filter member is formed from one or more materials selected from the group consisting of excelsior, straw and a porous foam material. 22. A soil erosion controlling wattle, comprising: (a) a walled elongated core member having a first open end comprising a coupler, a second end, an interior space and one or more openings in said wall communicating said interior space with the exterior of said core member; and (b) an outer filter member surrounding said core member and said coupler, said outer filter member capable of curtailing soil erosion and of passing fluid into said core member, wherein said walled elongated core member and said outer filter member both reside above ground. 23. The soil erosion controlling wattle of claim 22 further comprising a sec