A 120° central partial bearing, 4 in. in diameter and 5 in. long, carries 90 psi of projected journal area. The r/c ratio is 1000; ho is equal to 0.001 in. SAE 20 oil in Fig. 8-2 is used. Room temperature is 100°F. Rpm = 600. Assume the rate of cooling is 2.5 Btu/hr/ft2/°F. Assume housing temperature rises one-half as much as oil film. Find the oil film temperature and the required area of housing.
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