Logo photo above; Boatworks in the Brisbane to Gladstone Race 2015. Julie Geldard photo

3 Chingan 52 cats at Naiharn beach
Three Chincogan 52's in Naiharn. Photo by Doug Fuller

Trilogy racing at Airlie Beach Race Week
Trilogy at Airlie Beach. Photo by Bob Ross

I’m passionate about design. I’m passionate about the marine environment.

I’m privileged to be able to combine the work of design with my love of the ocean and the pleasure of play and adventure in the wind and the waves.


My work is to express that passion in the designs I create. To bring you the latest in design technology with inspired style and great sailing qualities. To connect you with the people, the processes, the materials and the technologies that make it all real while avoiding the cost and complexity that can stand in the way of your sailing enjoyment.


In 2016 we’re celebrating 30 years of designing high performance multihull yachts. 

Thirty years of exceptional racing achievements that you can see on the racing results pages.

Thirty years of designing boats for cruising, for racing, for the sheer enjoyment of sailing.

You can see a catalogue of some of those designs, and a our current model range on the projects page.


The year ahead.

We won’t be creating too many new designs in the coming year. We have a great lineup of modern designs that cover a range of sailing styles from cruising to high performance, large and small, catamaran and trimaran.


The focus for the coming year will be on the details. Improving the build documentation, an ongoing quest for cleaner and more efficient ways of building, and adopting new and appropriate technologies with an overriding philosophy of simplicity, efficiency and elegance in design.


Please feel free to become involved. Builders, suppliers and customers alike, we welcome your opinions and feedback on our work with a view to providing our customers with the best possible sailing experience.


Tony Grainger Jan 1. 2016






Now Designing

Flying Fish 45, 50 and 60

Design work for plans and kits for our new series of Flying Fish high performance cruising cats is now well advanced. The general arrangement drawings are complete and work is under way on the more detailed aspects of the designs.

The image above is the Flying Fish 50

 Latest details on the design here

An article in three parts on the design of beams for production folding trimarans.

Featured Articles

Weight and Length Compared

Weight and Length Compared.

We all want light boats for great performance even if we’re not racing, but most of us don’t want to spend a lot of money on exotic materials, detailed engineering studies and technically demanding construction methods. So how light can we get our chosen design without breaking the bank or building a boat that might not stand up to a hiding in adverse conditions?

We use some readily available data to literally draw a line about what you can expect to achieve in terms of weight for a given length, and we discuss some of the things you need to do if you want to get the structural component of the boat under that line.

See the full article here:

What makes Max fast?

Mad Max has been dominating the inshore race results in Australia for quite some time now and is the current title holder of the Australian Multihull Championships having won the series on OMR and taking line honours in every race.

She beat the Seacart 30 Morticia across the line in 5 of the 7 races at Airlie Beach Race Week 2015 and in all six races at Hamilton Island Race Week 2015.

George Owen has been at the helm of Mad Max for several years now and I posed the question to George “What is it that makes Max so fast right now?"

George was very generous with his response and there’s a wealth of valuable advice in George’s comments for the keen racing skipper, or the cruising skipper who simply wants to improve their performance.

See the full article here:

Where are the mid sized multihulls?

Is there a Case for a Class 40 Trimaran?

The big trimarans took most of the glory at the head of the fleet in the 2015 Fastnet Race, although Comanche seems to get along OK for a mono.

But in the under 60' size range there weren't too many competitive multihulls and it was the guys and gals on the Class 40's that were having all the fun.

What's the big attraction in the Class 40's and is there a role for a box rule for 40' multihulls to sail offshore races of this nature? Read more here: