Which mounting style is an example of a rotor disc blade configuration?

The fir tree mounting style is an example of a rotor disc blade configuration because it involves a design that allows for the efficient attachment of blades to a rotor hub. This configuration is characterized by the 'fir tree' shape, which resembles the branches of a fir tree radiating from a central trunk. This design provides a strong mechanical connection while allowing some flexibility, which is essential in applications such as turbines and rotors, where blades experience varying loads during operation.

The fir tree design typically features a series of grooves that help secure the blade in place, enhancing the overall aerodynamic performance while minimizing the risk of blade failure under high stress. This mounting style is particularly important in high-speed applications where the forces can be substantial, and maintaining blade integrity is crucial for safety and efficiency.