Abstract: A power transmission gearbox system for a turbomachine is provided. the power transmission gearbox system includes a drivetrain having one or more rotating components. The system further includes at least one static component interfacing with the one or more rotating components. The system further includes a sensor disposed on the at least one static component and configured to provide data indicative of strain in the static component. The system further includes a controller communicatively coupled to the sensor. the controller includes a processor and a memory. the processor is configured to perform a plurality of operations. The plurality of operations includes monitoring the data indicative of strain in the static component from the sensor. The operations further include determining, at least partially based on the data indicative of the strain in the static component, a torque in the one or more rotating components of the drivetrain.

Abstract: Tapered shafts for fluid pumps are disclosed. An example apparatus to pump fluid includes a gear, and a shaft including a taper to define a first portion of the shaft having a first thickness and a second portion of the shaft having a second thickness less than the first thickness, the second portion of the shaft between the gear and the first portion of the shaft.

Abstract: Tapered shafts for fluid pumps are disclosed. An example apparatus to pump fluid includes a gear, and a shaft including a taper to define a first portion of the shaft having a first thickness and a second portion of the shaft having a second thickness less than the first thickness, the second portion of the shaft between the gear and the first portion of the shaft.