Secondly, the leading edge of the gear case disrupts the flow of water over the propeller. Was there a way we could convert this wasted energy into productive power and improve propeller efficiency?
A single propeller creates forward thrust, to be sure, but also produces a significant amount of rotational energy as a byproduct. In developing the DF350A, we started with a blank sheet of paper, and considered all these factors in our design and engineering.įirst, we looked at the traditional single propeller design. On top of all this, boat speed is ultimately limited by hull design, the hydrodynamics of the lower unit and propellers, and how the outboards are mounted. However, larger displacement engines typically burn more fuel, adding weight creates a wide range of problems for boats, and more complex mechanical components create reliability concerns. Increasing displacement, or the use of a turbocharger or supercharger, makes more horsepower.
