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As long as the chines follow the flow of the water (flow lines) there is no powering penalty vs a round bilge shape. The amount of stern immersion is far more critical in determining performance

© Pat Bray
As long as the chines follow the flow of the water (flow lines) there is no powering penalty vs a round bilge shape.  The amount of stern immersion is far more critical in determining performance photo copyright Pat Bray taken at  and featuring the Power boat class
Power boat