Record infusion at RMK Marine...

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Record infusion at RMK Marine...

Industry News

The Turkish yard’s first Oyster 125 hull has set a new record for one-shot infusion – 6.3 tonnes of resin flowed under five hours. The above picture shows her following curing in a specially constructed 40m (131ft) oven.


The hull of the Oyster 125 was infused at RMK Marine in late April. It broke the world record for a single-shot infusion of any structure. The resin weight was 6.275 tonnes (13,805lbs), degassed over five hours. The hull shell was 37.7m (123ft 8in) bow to stern, 8.9m (29ft 2in) wide and 4.35m (14ft 3in) keelplate to gunwhale. The infusion height difference was 5.9m (19ft 4in) and the total infused area was 480m² (5,164ft²). And the total weight of the reinforcements (glass/carbon) was 11.0 tonnes (24,200lbs) and balsa-core weight was 3.0 tonnes (6.6lbs).
The process was designed, simulated by RTM-Worx software, and engineered by Arjen Koorevaar of Dutch infusion specialist Polyworx.
The resin used was Reichhold’s Hydrex 100 HF. An inhibitor was used to realise an open time of 5.5-6.0 hours – yes that accurate! It was selected because of its low shrinkage (owing to its very low styrene content) and low exotherm. Plus it has good mechanical properties and excellent chemical resistance.
All consummables, reinforcements (glass, kevlar and carbon) and balsa cores were supplied by Turkish composite materials manufacturer and distributor Metyx of Tuzla, Turkey. It also produced some custom materials for this project ‒ particularly a ‘Unifilo’ stitched on 800g/m² (0.16lbs/ft²) biaxial NCF.
The previous largest single-shot infusion was a composite bridge moulded by Fibercore of Rotterdam, The Netherlands. That one used 6.1 tonnes of resin.
Fit out of the first Oyster 125 is now underway and the yacht will be on the water in summer 2011. With four yachts in build by early Autumn 2010 ‒ Oyster 100-01 (sold), 100-02 (sold) and 100-03 (on spec) and Oyster 125-01 (sold) ‒ the next Oyster superyacht build slot at RMK Marine is for a 2012 delivery.
If you would like in-depth info on Oyster Marine Group, check out the video-interview with the company’s CEO David Tydeman in Issue No3 of Yachtbuilder International Magazine, which went live at the beginning of August. Just click the magazine front cover to the right of this page.

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© Phil Draper