A rotorcraft includes a plurality of fan assemblies. Each fan assembly of the plurality of fan assemblies includes a drivetrain having a gearbox with an input shaft and a mast coaxially aligned with the input shaft, and a plurality of electric motors coupled to the input shaft. Each electric motor of the plurality of electric motors is coupled to the input shaft via a sprag clutch.

A rotorcraft includes a plurality of fan assemblies. Each fan assembly of the plurality of fan assemblies includes a drivetrain having a gearbox with an input shaft and a mast coaxially aligned with the input shaft, and a plurality of electric motors coupled to the input shaft. Each electric motor of the plurality of electric motors is coupled to the input shaft via a sprag clutch.

The present document relates to a support assembly for a torque converter reaction member, comprising a support member comprising an indentation and a shoulder portion, a retention member partially received in the indentation of the support member, at least one one-way clutch disposed on the support member and defining a rotation axis, and a sleeve member supported on the at least one one-way clutch. At least one of the at least one one-way clutch and the sleeve member is disposed at least partially axially in between the retention member and the shoulder portion of the support member and is axially supported on the retention member and on the shoulder portion of the support member. The present document further relates to a torque converter assembly including said support assembly.

The present document relates to a support assembly for a torque converter reaction member, comprising a support member comprising an indentation and a shoulder portion, a retention member partially received in the indentation of the support member, at least one one-way clutch disposed on the support member and defining a rotation axis, and a sleeve member supported on the at least one one-way clutch. At least one of the at least one one-way clutch and the sleeve member is disposed at least partially axially in between the retention member and the shoulder portion of the support member and is axially supported on the retention member and on the shoulder portion of the support member. The present document further relates to a torque converter assembly including said support assembly.

The disclosure relates to an overrunning clutch, comprising a torque-introducing clutch element, a torque-receiving clutch element and switching element, which is forced from an engagement position into a freewheeling position or from a freewheeling position into an engagement position in dependence on the direction of a sufficient change in the rotational angle position between the torque-introducing clutch element and the torque-receiving clutch element by means of an actuating force applied to the switching element by an actuator. According to the disclosure, the actuating force is a friction-induced actuating force, which is induced by means of a friction-force pairing between the actuator and a component of the overrunning clutch that is in frictional contact with the actuator and the actuator forms an interlockingly acting actuating stop, by means of which the actuating force acts on the switching element.

To provide a simple-structured cam clutch that does not require precise control, uses a smaller drive force, provides improved clutch operation stability and high responsiveness, and offers more mode switch options. The cam clutch includes a plurality of cams circumferentially arranged between an inner race and an outer race. The cams are arranged in a plurality of rows adjacent each other in a direction of rotation axis. The cam clutch has a selector that allows a rotation angle thereof to be controlled relative to the inner race or the outer race. The selector has a cam orientation control surface capable of changing the orientation of at least one row of cams by making contact with a cam surface. The cam orientation control surface includes a cam release portion radially protruded toward the cams more than a cam actuator portion and moving the cams to a non-operating orientation.

To provide a simple-structured cam clutch that does not require precise control, uses a smaller drive force, provides improved clutch operation stability and high responsiveness, and offers more mode switch options. The cam clutch includes a plurality of cams circumferentially arranged between an inner race and an outer race. The cams are arranged in a plurality of rows adjacent each other in a direction of rotation axis. The cam clutch has a selector that allows a rotation angle thereof to be controlled relative to the inner race or the outer race. The selector has a cam orientation control surface capable of changing the orientation of at least one row of cams by making contact with a cam surface. The cam orientation control surface includes a cam release portion radially protruded toward the cams more than a cam actuator portion and moving the cams to a non-operating orientation.

A failsafe multimode clutch assembly positioned in a powertrain of a rotorcraft. The clutch assembly includes a freewheeling having a driving mode in which torque applied to the input race is transferred to the output race and an overrunning mode in which torque applied to the output race is not transferred to the input race. A bypass assembly has an engaged position that couples the input and output races of the freewheeling unit. An actuator assembly uses pressurized lubricating oil to shift the bypass assembly between the engaged position and a disengaged position. A lock assembly enables and disables actuation of the bypass assembly. In the disengaged position, the overrunning mode of the freewheeling unit enables a unidirectional torque transfer mode of the clutch assembly. In the engaged position, the overrunning mode of the freewheeling unit is disabled such that the clutch assembly is configured for bidirectional torque transfer.

A sliding balance board has an eccentrically mounted center wheel as a pivotable central balancing member, a wheel with one-way sprag clutch bearings mounted near the left end of the board and a wheel with one-way sprag clutch bearings mounted near the right end of the board. A user balances himself/herself on the board, and yet slides the board to the left and right, back and forth by shifting his/her weight left and right, synchronized to the rocking motion of the eccentrically mounted center wheel.

A sliding balance board has an eccentrically mounted center wheel as a pivotable central balancing member, a wheel with one-way sprag clutch bearings mounted near the left end of the board and a wheel with one-way sprag clutch bearings mounted near the right end of the board. A user balances himself/herself on the board, and yet slides the board to the left and right, back and forth by shifting his/her weight left and right, synchronized to the rocking motion of the eccentrically mounted center wheel.