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Figure 3 shows the bottom of the hull with a drag reduction system in operation. Air bubbles are introduced into the water below the hull.
Figure 3 shows the bottom of the hull with a drag reduction system in operation.
Air bubbles are introduced into the water below the hull. This reduces the work done per second against the drag on the hull at any given speed.
However, when the air bubbles reach the propeller they decrease the mass of water being accelerated by the propeller every second. This decreases the thrust produced by the propeller at a given speed of rotation.
Figure 3
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