NEW PRODUCTS
Smallest ever surface effect workboat
What is thought to be the smallest SES (Surface Effect Ship) workboat is being built in Denmark for operation on wind farms. At just 15.8 metres, this new SES is being built for operators Wind Partner who plan to charter the boat out to operators.
The design for Sea Puffin has been developed by naval architects Espeland & Skomedal (ESNA) of Norway and features a catamaran hull with fabric skirts enclosing the air cushion between the hulls. It is designed to be capable of being launched with a standard 15 tonne single point davit system.
The Sea Puffin is powered by a pair of 230 kW diesels that are coupled to water jets. These will give a speed of 25 knots and this speed can be maintained in sea state 3 with the designers claiming that the air cushion supporting the SES will damp out motions and give a comfortable ride. In addition to transferring technicians to wind farm turbines the SES will also be capable of carrying cargoes.
ESNA claims that in addition to its sea-going capabilities this new daughter craft will offer significant savings in fuel consumption. It will have a range of 150 miles and the vessel will be classed by Bureau Veritas.
Caterpillar Marine to develop advanced propulsion system for marine applications
Caterpillar Marine, partnering with Caterpillar Innovation & Technology Development Division (ITDD), is in the process of developing a proprietary advanced propulsion system for marine applications. The Cat® Marine Advanced Variable Drive™ (AVD™) is a patented system that leverages Caterpillar’s extensive experience with heavy duty continuously variable transmission (CVT) technology, advanced controls and power system integration knowledge.
In this joint development, ITDD is leading a cross-functional innovation team to develop and validate a fully integrated marine propulsion system from bridge interface down to the propellers.
“Thanks to the flexibility enabled by the innovative Caterpillar AVD™ technology, the speed of the vessel’s engines can be modulated and optimized independently from the speed of the fixed pitch propellers. The speed of the propellers can be varied continuously throughout their full speed range. In addition, the power of the main and auxiliary engines can be channeled independently or jointly to propel the vessel,” said Igor Strashny, Caterpillar ITDD Engineering Manager with responsibility for Advanced Marine Propulsion. “These features provide superior vessel performance and maneuverability while facilitating significant improvements in fuel and operational efficiency.
68 | The Report • March 2018 • Issue 83
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