ANALYSIS AND DESIGN ASSIGNMENTS The purpose of the following assignments is to prepare aids that a designer of fluid power systems can use to specify appropriate sizes of steel tubing for a system being designed. Some also help to evalu- ate energy losses and to ensure that losses due to bends in the tub- ing are as low as practical. 1. Your company designs special-purpose fluid power systems for the industrial automation market. The normal technique used to fabricate the systems is to route steel tubing among the pumps, control valves, and actuators for the system using straight tubing and 90 bends. Many different sizes of tubing are used in the systems depending on the flow rate of hydrau- lic oil required for the application. You are asked to create a chart of the recommended bend radii for each nominal size of steel tubing listed in Appendix G.1. The wall thickness for each size will always be the largest listed in the table because of the high pressures used in the hydraulic systems. According to Fig. 10.28, the minimum resistance will occur when the relative radius of the bend is approximately 3.0. Create the table of recommended bend radii, rounding the radii to the nearest in, but ensure that the relative radius of any bend is never less than 2.0. A spreadsheet approach is suggested.