Always the ultimate in speed, maneuverability, efficiency and dependability Twin Disc Arneson Surface Drives presents the new bigger unit of its line the ASD18, for bigger boats and more powerful 3000hp plus engines. Arneson Drives is all about surface-piercing propellers reducing underwater drag to 50% compared to a submerged propeller system. In fact on an Arneson Surface Drive the only surface to contact the water is the propeller and the protective fin. This results in higher speeds, quicker acceleration and a better payload to power ratio, in all this improving fuel economy and lowering operating costs. The new ASD18 increases the torque limit by nearly double versus the previous bigger ASD16, with a max torque of 51528nwm. It features an overall length of 2892mm, and a thrust socket diameter and size of 762mm. The materials used for the new big ASD18 are Bronze, Almac, Stainless Steel, and Acquamet 17 for the propeller shaft. Turning angle is a total of 36 degrees, and vertical trim is 15 degrees.
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