Brochures Available On New Line Of Twin Disc Marine Transmissions

Twin Disc recently introduced the line of coaxial in-line models of the NICO MGN Series of marine transmissions covering a range of up to 3,729 kw (5,000 hp). The company has announced an extension of this line to include horizontal and vertical input output versions of this transmission series.

These new units are available with nominal capacities from 662 to 1,030 kw (888 to 1,381 hp), depending upon ratio, speed, and duty classifications. Additional sizes will be released in the near future to cover additional capacity ranges.

The major factor involved in the selection of a coaxial versus vertical versus horizontal offset input /output transmissions is the hull design, which in turn is predicted primarily on the boat function and the type of waters in which it will operate. Another factor is the necessary propulsion horsepower and/or torque to reach desired vessel performance where major factors are speed (free running, towing, or dragging), maneuverability, and stability.

In general, coaxial and horizontal units have the capability for a lower engine installation in the hull which improves stability.

The horizontal units have an additional advantage because the engines can be moved inboard while the propeller center line remains outboard for improved maneuverability. Boats using this type of transmission are most commonly found on the rivers or intercoastal waterways.

Vertical offset units are most commonly used in V-shaped hulls where sufficient room is not available to allow for low engine installation.

V-type hulls are most popular on offshore boats such as fish, supply and tugs.

For free brochures on both the coaxial and horizontal and vertical versions, Write 26 on Reader Service Card

Other stories from October 1981 issue


Maritime Reporter

First published in 1881 Maritime Reporter is the world's largest audited circulation publication serving the global maritime industry.