Tomahawk single-engine cat range to launch at Sanctuary Cove show
Blue Diamond Marine will reveal the Tomahawk range of trailerable catamarans using a single outboard engineA former 18-foot skiff world champion will use the 2024 Sanctuary Cove International Boat Show to launch a revolutionary trailerable powered catamaran range that is optimised to use a single outboard engine.
NSW-based alloy boat specialist Blue Diamond Marine will launch the Tomahawk, an asymmetric-hulled, reverse-bowed powered catamaran range that will come in centre console, T-top, cuddy cabin, hardtop and bowrider layouts.
The range will start with the 4.0-metre Tomahawk 495, featuring 50hp to 90hp outboard engines; the Tomahawk 550 rated between 80hp to 130hp; and the flagship 7.5-metre 620, rated between 115hp to 150hp.
Blue Diamond Marine already builds 7.0-metre, 10.0-metre, 12.0-metre and 14.0-metre commercial catamarans, as well as a 12.0-metre glass-bottomed boat.
The Tomahawk will cost from about $110,000 sitting on an aluminium trailer, with fully customisable options available.
The people behind the venture are former world-class sailor and custom boat builder Scott Ramsden, and marine design engineer Austin Kell. Ramsden says the asymmetrical hull design of the Tomahawk was reimagined to minimise tunnel disturbance, a reason why twin-hulled boats have struggled to work with just a single engine.
“We’ve produced an asymmetrical hull instead of a symmetrical hull, with a single engine, and designed a water deflector mechanism that is placed in the middle of the tunnel to ensure optimum clean water flow to the props, eliminating any cavitation issues,” Ramsden says.
“The result is a catamaran with increased width and comfort but lots of stability, and less emissions, maintenance and expense.
“It’s a very smooth ride with a quality, not a tinny, feel and we anticipate it will revolutionise the trailer boat market.”
Images of one of the boats, a Tomahawk 620 centre console with deep walkaround decks, show a wave-piercing bow design with hard chines running aft right from the stem. The tunnel is quite wide, and appears to have a deep vee bottom aft.
The bow of the boat is squared off internally with what looks like storage lockers behind SOPAC doors built into it, and side pockets running aft.
The cockpit features two large coaming doors that make it easy to pull a gamefish onboard. The transom is set lower than the coamings, with a protective cage built over the outboard engine with a tow point.
The centre console has a wide two-seat leaning post and a large flat dash protected behind a wide windscreen.
The 2024 Sanctuary Cove International Boat Show runs from May 23-26.
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