QUESTION 1 You are requested to design the de-machine requirement to convert a power boat into an all-electric propulsion system. The boat needs to maintain a speed of 31 knots. The drag force of the water on the boat is simplified to F = 99.7 * v² N where v is the speed in m.s1. The efficiency of the 2:1 reduction gearbox connecting the motor to the propeller is 63 % and the propeller needs to turn at 920 rpm to achieve the maximum boat speed. Calculate the required motor power in Watts to one decimal.
QUESTION 1 You are requested to design the de-machine requirement to convert a power boat into an all-electric propulsion system. The boat needs to maintain a speed of 31 knots. The drag force of the water on the boat is simplified to F = 99.7 * v² N where v is the speed in m.s1. The efficiency of the 2:1 reduction gearbox connecting the motor to the propeller is 63 % and the propeller needs to turn at 920 rpm to achieve the maximum boat speed. Calculate the required motor power in Watts to one decimal.
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Transcribed Image Text:QUESTION 1
You are requested to design the de-machine requirement to convert a power boat into an all-electric propulsion system. The boat needs to
maintain a speed of 31 knots. The drag force of the water on the boat is simplified to F = 99.7 *2 N where v is the speed in m.s1.
The efficiency of the 2:1 reduction gearbox connecting the motor to the propeller is 63 % and the propeller needs to turn at 920 rpm to
achieve the maximum boat speed.
Calculate the required motor power in Watts to one decimal.
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