T-MATS: Shaft Library Block
This block simulates the performance of a shaft using basic dynamic equations and properties.

Shaft Inputs:

Shaft Input	Description
Torque	input torque from torque source or sink [lbf*f]
NmechIn	Mechanical shaft speed[rpm]. This input is simply passed through to the output and is needed only for understandability purposes. Calculation of Nmech is completed with the integration of shaft output Ndot.

Shaft Outputs:

Shaft Output	Description
NmechOut	Mechanical shaft speed[rpm], equal to the input shaft speed.
Ndot	mechanical shaft speed acceleratoin [rpm/sec]

Shaft Mask Variables:

Turbine Mask Variable	Description
Shaft_Inertia_M	Shaft Inertia Term [lbf*ft^2]