RAKU Catamarans Design Features and Options
Each of the Raku designs offers a range of design options that allow you to configure your boat to suit your personal preferences and budget.
Raku 52 Squareback
Squareback has a raised transom platform to support transom hung rudders and outboard motors can be mounted on back face of the aft beam. The transom hung rudders can use wheel steering or tillers. Raku 30 comes in Squareback version only. The larger designs offer the choice of Squareback or Classic
Raku 52 Classic
The classic version features a raked transom with a low swim deck. This version is best suited to inboard engines and underhung balanced rudders. Both versions can have the helm station aft or forward on the bulkhead.
Go with a conventional saloon with a wealth of storage and bench space and good protection for dining, cooking and navigating, or open up the saloon to the cockpit to create a harmonious living space that invites the free flow of tropical breezes.
If you don't incorporate a sill at the base of the companionway door a transverse beam is required under the wing deck.
The options shown here can be applied to all of the cats in the Raku range, except that the Raku 30 has its own unique accommodation layout, and is better suited to tiller steering, outboard motors and daggerboards (rather than minikeels) than the larger designs.
We generally advise that two double cabins be allocated to the cabin area aft of the saloon bulkhead, although some owners choose to locate a bathroom or workshop to this area.
Apart from that option one or two bathrooms can be allocated to the centre of the hull opposite the saloon, and one or more bathrooms can be allocated to the forward area in the hull as long as there is no berth to be provided for in that area.
A wider berth can provided on the wingdeck forward of the mast bulkhead on one or both sides. If no berth is required here it makes an ideal stowage space with access from the deck.
The Raku 30 has different layouts to the larger boats in the range.
For inboard installations we recommend diesel engines for reliability, light weight and economy. Sail drives are generally preferred for ease of installation. Outboard motors are optional for the Squareback models but are not recommended for long term blue water cruising or if bar crossings are likely to be encountered.
Choose between aluminium mast and boom (either rotating or non rotating) and a carbon rig, (either rotating wing section or conventional oval mast section), rotating or non rotating. A carbon rig will be lighter and provide better performance but is more expensive.
Daggerboards provide the ultimate in performance, especially for upwind performance in light air. They also provide faster tacking. Fixed keels are preferred for fuss free cruising and provide protection for the sail drive leg and propellors.
Choose between hydraulic steering, a mechanical drive system, or a flexible line system with pulleys. The choice depends largely on where you locate the helm station and your priorities regarding weight, cost, and simplicity of installation. Hydraulic steering is the default choice for many cruising boats with cable or mechanical being preferred for a more direct and more responsive feel to the helm.
The location of the helm is a matter of personal choice. There is better visibility from the helm if it's on the saloon bulkhead, but having it aft allows for more seating space in the cockpit and prides direct access to the mainsheet and traveller controls.
Choose between a fixed longeron/forebeam configuration for the code zero and gennaker, or a conventional catwalk and forebeam configuration with option of a removable bow pole for the zero and gennaker. The longeron and forebeam are built from carbon.
Raku cats are built using composite sandwich construction with PVC foam cores, glass skins, epoxy matrix and carbon reinforcements. Build from a Duflex Kit or have your boat built one off from a builder of your own choice.
Manage your own project by building from a Duflex kit supplied by ATL Composites in Australia (world wide distribution) or by VDL Composites in Germany (Europe only).
Supplement your kit with moulded components such as hull shoes and cabin tops to help speed the project and give your boat a professional touch.
Purchase a complete kit of professionally manufactured components and assemble the boat yourself or have it assembled by a professional team in your home country.
We are currently working with a number of builders world wide who may be interested in producing tooling for moulded components.
Work with a professional yard to spec your boat and have it professionally finished ready to sail away.
Contact Grainger Designs for contact details of builders who may be interested in quoting to build your Raku
The combined Newsletter for Grainger Designs and Rocket Factory Trimarans
Our DuFLEX kit systems streamline the construction process for amateurs and professional yards alike. More details here…