Question: 1 2 - 2 1 If the gearset in Problem 1 2 - 1 2 transmits 3 9 hp at 2 6 0 0 arm

12-21 If the gearset in Problem 12-12 transmits 39 hp at 2600 arm rpm, find the torque on each shaft. 12-21 If the gearset in Problem 12-12 transmits 39 hp at 2600 arm rpm, find the torque on each shaft.
12-12 An epicyclic spur gear train as shown in Figure 12-16 has a sun gear of 23 teeth and a planet gear of 31 teeth. Find the required number of teeth in the ring gear and determine the ratio between the arm and ring gear if the sun is held stationary. Hint: Consider the arm to rotate at 1 rpm .
FIGURE 12-16
1 2 - 2 1 If the gearset in Problem 1 2 - 1 2

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