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A cable drum for a crane is to rotate between 160 and 166 rpm. Design a gear drive for 25 hp in which the input pinion rotates at 925 rpm and the output rotates with the drum. The crane is expected to operate with a 50% duty cycle for 120 hours per week for at least 10 years. The pinion and the gear drive must fit within the 24-in inside diameter of the drum, with the gear mounted on the drum shaft. Assume that a number of pinion teeth, Np=17 and rim thickness factor (KB), a service factor (SF) and a reliability factor (KR) are equal to 1.00 for both pinion and gear. Perform stress analysis (bending and contact) for both pinion and gear and determine required hardness (HB) values.
a pressure delta p of 50 psi is to be applied to a pipe roughness e0.01 inches length l500 feet to generate a required
An insulated rigid container is separated into two parts using a partition that is free to move and the partition allows heat transfer without any energy storage by itself. Initially 2 kg of air at 5 bar and 350 K is contained on one side of the part..
a well- insulated rigid tank contains 5 kg of a saturated liquid-vapor mixture of water at 150 kpa.
A tank initially filled with 500 lb liquid water is being filled with water through two inlet pipes. One delivers hot water at mass flow rate of 1.5 lb/min and the second delivers cold water at a mass flow rate of 3 lb/min. A single exit pipe is drai..
in a pipe 0.3 m in diameter 0.3 m3s of water is pumped up a hill. on a hilltop elevation 48 m the line reduces to 0.2 m
Determine the peak runoff from 500 ft of pavement(32ft wide) that drains toward a gutter(for 10 years freq. storm), the pavement slope is .0005, n=.016 and c=.9
a 1600 kg supercar executes a rolling start and accelerates rapidly. the road is horizontal. neglect tire resistance
a 20deg steel spur pinion with 25 teeth and module 1.5 mm transmits 150 w to a 49 tooth cast iron gear. pinion speed is
a bottle containing 10 kg of water at an initial temperature of 35 degrees celsius is stored in a refrigerator whose
An adiabatic piston cylinder contains 1 kg of R-134a. Initially the conditions inside the piston are 200 kPa and 0 degrees C. An electric heater inside the device runs with constant voltage of 110 V and a constant 0.1A of current for one hour.
an aircraft is in level flight at 225 kmhr through air at standard conditions. the lift coefficient at this speed is
q1 write a matlab code which must have following inputs and outputsinputs1. an arbitrary geometry matrix2. basis
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