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An aircraft gas turbine engine includes a low pressure turbine having a low pressure turbine flowpath and counter rotatable low pressure inner and outer shaft rotors having inner and outer shafts, respectively. The low pressure inner and outer shaft rotors include low pressure first and second turbi

An aircraft gas turbine engine includes a low pressure turbine having a low pressure turbine flowpath and counter rotatable low pressure inner and outer shaft rotors having inner and outer shafts, respectively. The low pressure inner and outer shaft rotors include low pressure first and second turbine blade rows disposed across the turbine flowpath and drivingly connected to first and second fan blade rows by low pressure inner and outer shafts, respectively. At least one of the low pressure first and second turbine blade rows is interdigitated with an adjacent pair of one of the turbine blade rows. At least one row of non-rotatable low pressure vanes is disposed across the low pressure turbine flowpath between a non interdigitated adjacent pair of one of the turbine blade rows.

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An aircraft gas turbine engine includes a low pressure turbine having a low pressure turbine flowpath and counter rotatable low pressure inner and outer shaft rotors having inner and outer shafts, respectively. The low pressure inner and outer shaft rotors include low pressure first and second turbi

An aircraft gas turbine engine includes a low pressure turbine having a low pressure turbine flowpath and counter rotatable low pressure inner and outer shaft rotors having inner and outer shafts, respectively. The low pressure inner and outer shaft rotors include low pressure first and second turbine blade rows disposed across the turbine flowpath and drivingly connected to first and second fan blade rows by low pressure inner and outer shafts, respectively. At least one of the low pressure first and second turbine blade rows is interdigitated with an adjacent pair of one of the turbine blade rows. At least one row of non-rotatable low pressure vanes is disposed across the low pressure turbine flowpath between a non interdigitated adjacent pair of one of the turbine blade rows. 1, wherein each of the actuators further comprises: a stow position switch operable to supply a thrust reverser stow signal when the thrust reverser is in the stowed position. 6. The system of claim 1, wherein each of the actuators further comprises: at least one thrust reverser lock operable to selectively move between a locked position and an unlocked position. 7. The system of claim 6, wherein each lock is pivotally mounted proximate an end of the actuator, and wherein the actuator further comprises: a biasing element mounted proximate one of the at least one locks and having a portion in abutting contact with the lock, to thereby bias the lock toward the unlocked position. 8. The system of claim 7, wherein the controller is further operable to supply lock control signals, and wherein each actuator further comprises: a lock solenoid having a moveable slug, the lock solenoid coupled to receive the lock control signals and operable, in response thereto, to selectively move the slug so as to engage and disengage the lock. 9. The system of claim 7, wherein each of the actuators further comprises: a lock position indicator coupled to the actuator proximate the at least one lock and operable to supply lock position signals representative of the locked and unlocked position. 10. The system of claim 1, wherein the jack screw is rotationally mounted by at least two bearing assemblies. 11. The system of claim 1, wherein each of the actuators further comprises: a speed sensor coupled to the electric motor and operable to generate a feedback signal representative of electric motor rotational speed, wherein the controller is coupled to receive the feedback signal from the speed sensor and condition the actuator control signals to control the electric motor rotational speed. 12. A thrust reverser actuator, comprising: an electric motor having an output shaft operable to rotate in one of a first direction and a second direction; one rotationally mounted jack screw having a first end and a second end, the first end coupled to the electric motor output shaft without any intervening gears, to thereby rotate in the first direction and the second direction; a roller nut assembly mounted on the jack screw and configured to couple to a thrust reverser; and at least one roller nut position sensor operable to supply position signals representative of a position of the roller nut, wherein rotation of the jack screw in the first direction causes translation of the roller nut assembly toward the jack screw first end and rotation of the jack screw in the second direction causes translation of the roller nut toward the jack screw second end. 13. The actuator of claim 12, further comprising: an electromagnetic brake assembly coupled to the electric motor and operable, in response to a predetermined signal, to selectively stop the rotation of the electric motor. 14. The actuator of claim 12, wherein the roller nut position sensor comprises a first position sensor and a second position sensor, the first position sensor coupled to the actuator proximate the jack screw first end and the second position sensor coupled to the actuator proximate the jack screw second end. 15. The actuator of claim 14, wherein each position sensor comprises an eddy current kill oscillator (ECKO) proximity sensor. 16. The actuator of claim 15, further comprising: a first target assembly coupled to a first portion of the roller nut, the first target assembly positioned adjacent the first position sensor when the roller nut is positioned proximate the jack screw first end; and a second target assembly coupled to a second portion of the roller nut, the second target assembly positioned adjacent the second position sensor when the roller nut is positioned proximate the jack screw second end. 17. The actuator of claim 12, further comprising: a stow position switch operable to supply a thrust reverser stow signal when a thrust reve rser is in the stowed position. 18. The actuator of claim 12, further comprising: at least one thrust reverser lock operable to selectively move between a locked position and an unlocked position. 19. The actuator of claim 18, further comprising: a solenoid operable, in response to an input signal, to selectively engage and disengage the thrust reverser lock. 20. The actuator of claim 18, further comprising: a lock position indicator positioned proximate the thrust reverser lock and operable to supply lock position signals representative of the locked and unlocked position. 21. The actuator of claim 12, wherein the jack screw is rotationally mounted by at least two bearing assemblies. 22. The actuator of claim 12, further comprising: a speed sensor coupled to the electric motor and operable to generate a feedback signal representative of electric motor rotational speed. 23. The actuator of claim 12, wherein the jack screw is a roller screw having a thread pitch of approximately 0.078 inches. 24. A thrust reverser actuator, comprising: a housing; an electric motor mounted within the housing, the motor having an output shaft operable to rotate in one of a first direction and a second direction; an electromagnetic brake assembly mounted within the housing and coupled to the electric motor and operable to selectively stop the rotation of the electric motor; one rotationally mounted roller screw mounted within the housing, the roller screw having a first end and a second end, the first end coupled to the electric motor output shaft without any intervening gears, to thereby rotate in the first direction and the second direction; and a roller nut assembly mounted on the jack screw and configured to couple to a thrust reverser; and at least one roller nut position sensor operable to supply position signals representative of a position of the roller nut, wherein rotation of the jack screw in the first direction causes translation of the roller nut assembly toward the jack screw first end and rotation of the jack screw in the second direction causes translation of the roller nut toward the jack screw second end. 25. The actuator of claim 24, wherein the at least one roller nut position sensor comprises a first position sensor and a second position sensor, the first position sensor coupled to the actuator proximate the jack screw first end and the second position sensor coupled to the actuator proximate the jack screw second end. 26. The actuator of claim 25, wherein each position sensor comprises an eddy current kill oscillator (ECKO) proximity sensor. 27. The actuator of claim 26, further comprising: a first target assembly coupled to a first portion of the roller nut within the housing, the first target assembly positioned adjacent the first position sensor when the roller nut is positioned proximate the jack screw first end; and a second target assembly coupled to a second portion of the roller nut within the housing, the second target assembly positioned adjacent the second position sensor when the roller nut is positioned proximate the jack screw second end. 28. The actuator of claim 24, further comprising: a stow position switch mounted within the housing and operable to supply a thrust reverser stow signal when a thrust reverser is in the stowed position. 29. The actuator of claim 24, further comprising: at least one thrust reverser lock mounted on the housing and operable to selectively move between a locked position and an unlocked position. 30. The actuator of claim 29, wherein each lock is pivotally mounted within the housing proximate an end of the actuator, and wherein the actuator further comprises: a biasing element mounted within the housing proximate one of the locks and having a portion in abutting contact with the lock, to thereby bias the lock toward the unlocked position. 31. The actuator of claim 29, further comprising: a solenoid mounted within the housing a