Ocean Magazine : 9 September October 2006
48 | ocean WATER MAR K New Zealand's High Modulus Collaborates With Cheoy Lee With announcement after announcement recently about international companies setting up boat yards in China, the New Zealand-based international composites engineers High Modulus has pointed out that it continues to build on its long standing relationship with one of the most successful Chinese boatyards, Cheoy Lee. "Far from being one of the new boys on the block, Cheoy Lee has been in the boating business for over 100 years, and now employs around 1,000 people," says a spokesman. "Still family run, it was one of the first companies to develop, test and build yachts using fibreglass construction techniques, and they have continued to enhance their composite expertise through their 15 year long collaboration with High Modulus. "Already in 2006, High Modulus has been busy completing composite structural work on two Cheoy Lee-built yachts. Recently launched was a 95 feet motoryacht, designed by US-based Michael Burvenich, and named the flagship model of Cheoy Lee's Sport range, all of which have been High Modulus-engineered. "And currently in build is a 45 m Transocean Explorer for Hong Kong-based MCC, designed by Ron Holland as the first of the Marco Polo series, destined to explore the world's remotest regions. asia-pacific "Structural engineering challenges faced by the team in this current project are quite interesting. When designing larger displacement vessels with slower speeds, designers and yacht owners often opt for metal hulls. However, the superstructures on these imposing yachts can benefit from composites, in terms of reduced weight aloft, low maintenance and the ability to be moulded into complex shapes. "Often the combined approach offers the best of both worlds. Ron Holland and the client for the 45 m chose this route, commissioning High Modulus to undertake the structural engineering of all composite components. "A major part of High Modulus' involvement was the determination of the laminate specification for the composite components, namely the lower and upper house levels and the flybridge. "Due in part to the skin thickness requirements of the Australian Lloyds Register office, the certification authority for the boat, it was deemed logical to use chopped strand mat and woven roving reinforcements for the majority of the laminate. "However, in order to provide an accurate specification, High Modulus undertook a cost and weight analysis. The analysis demonstrated that as the fibre content increased, and the skin properties improved with infused multiaxial options, it was possible to reduce the core thickness and still comply with Lloyds regulations, whilst maintaining the same weight. Furthermore, the overall cost varied little, as the higher cost of the mulitaxial materials was offset by the reduced cost of the core when the required thickness decreased. "This optimisation enabled High Modulus to select a combination of materials to meet the various structural criteria set by the designer and Lloyds, as well as achieving the required weight and cost objectives."
10 November December 2006
8 July August 2006