Showing posts with label Twin Disc. Show all posts
Showing posts with label Twin Disc. Show all posts

June 17, 2020

Howard Arneson 1921 - 2020

Howard Arneson has passed away at the age of 99, on June 16 at 2200 hours. His today world famous Arneson surface drives were first developed in offshore racing in 1980. The system allows the propeller to run partially above the the water line which in turn creates less drag.  Unlike previous invented surface drives the Arneson Surface Drive could also steer and trim, with previous similar inventions being fixed units and with rudders. After first testing the drives on an 18 Arena Craft, Arneson purchased a 38 wooden Cougar Cat to prove their worth.  Arneson driven by Tony Garcia, won nine races and two World Championships.  The system was also used on fast sport cruisers and yachts, with the first builders to commercial use the system being Italian builder Baia and American Magnum.  In 1992 Twin Disc acquired the rights to distribute and manufacture the Arneson Surface Drvies.  Arneson held eighteen patents for his various inventions, his most commercially successful was the Arneson Pool Sweep.  Legendary golfer Arnold Palmer promoted the product in the 1970’s.  Arneson was born May 25 1921 in Benicia, California, he died June 16 2020 in San Rafael, California.  Howard Arneson died of natural causes.

July 7, 2009

Propulsion: Twin Disc Arneson ASD8-10 Dual Fin

Arneson Surface Drives which are among the most efficient marine propulsion systems in the world present a new Dual Fin option for the ASD8-10 models. With the their surface piercing propeller design which reduces underwater drag by 50% compared to conventional submerged props drive systems. The only surfaces to contact the water are propeller blades and a protective skeg. This results in higher overall speed, quicker acceleration, and a better payload to power ratio with a 50% less drag significantly improving fuel economy while lowering operating costs. The new Arneson Dual-Fin surface drives available in the ASD8-10 models has an an aluminium drop box assembly, with a maximum torque capacity of 1200 lbs, weighs 458 lbs, a length over all of fifty four inches, steering angle of forty degrees, and a trim angle of fifteen degrees. This new set up also requires counter rotating engines for rotation change.

February 16, 2009

Propulsion: Twin Disc Arneson ASD18

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.