Which of the following is not part of the calculation to determine hydraulic hose pressure drop?

When calculating the pressure drop in a hydraulic hose, several factors are taken into consideration to ensure an accurate assessment of how fluid flows through the system. The inside diameter of the hose is crucial because it directly affects the flow rate and resistance. A larger inside diameter usually results in lower pressure drop due to decreased friction.

Fluid viscosity plays a significant role as well, since it describes the resistance of the fluid to flow. Higher viscosity fluids create more friction, increasing the pressure drop.

The number of couplings is also important in the calculation because each coupling can contribute additional resistance to flow, which can further impact the pressure drop.

On the other hand, the outside diameter of the hose does not directly influence the calculation of pressure drop. The outside diameter is more relevant for considerations like mounting and compatibility with fittings rather than the actual flow dynamics within the hose. Thus, it is not factored into the calculations for determining pressure drop in hydraulic hoses.