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A minimum-sized bearing that is consistent with reported current practice is desired for a steady load. SAE 20 oil is to be used, and the average film temperature is expected to be at 160°F. A ratio of L/D = 1 is required. The journal bearing is to be designed to carry a radial load of 1500 lb at 1200 rpm.
(a) Determine the values of L and D.
(b) Determine values of c corresponding to the two edges of the optimum zone in Figure 13.13.
(c) Does the value of c for minimum friction satisfy Trumpler's criterion for minimum acceptable film thickness?
If the cable at one end is attached directly and permanently to a tree and a person pulls on the other end with a force of 75 lb, what force would exist in the steel cable?
A load test on a 8-mm diameter by 375-mm long aluminium alloy rod found that a tension load of 4800N caused an elastic elongation of 0.52-mm in the rod. Using this result, determine the elastic elongation that would be expected for a 23-mm diameter r..
You have been tasked to design a new shell-and-tube heat exchanger for the chemical plant in which you work. The heat exchanger will utilize cooling water to cool Syltherm 800 (a heat transfer ?uid)
an airplane is flying at v0130 mph and with a constant time rate of increase of speed v22fts2 when it starts to climb
(a) Find the total downward force exerted by the liquid and the atmosphere on the top of the object. (b) Find the total upward force on the bottom of the object. (c) Find the tension in the wire. (d) Calculate the buoyant force on the object using Ar..
How does DN differ qualitatively from the volume mean diameter Dv
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A 1200 kg car moving at 20 km/h is accelerated at a constant rate of 4 m/s^2 up to a speed of 75 km/h. What are the forces (N) and total time (s) required?
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