The ice failure force component seems to be proportional to the ice strength. For the thrust, the inertia force is by far the major component and the ice failure force is minor. The hydrodynamic force increases the thrust, while the other forces decrease it. For the torque, the ice failure force is strongly dependent on the ice strength and is the largest of all the force components, followed by the hydrodynamic force and then the inertia force which is about half the hydrodynamic force. For the spindle torque, the inertia force and the ice failure force are the largest components and are comparable to each other.
Hydrodynamic force is approximately half the inertia force.
As mentioned above, inertia and hydrodynamic forces are comparable to or larger than the ice failure force. Rational scaling laws must be considered and applied to the respective force components when ice forces on a full-scale propeller are extrapolated from the results of the model experiments.