Ben Kelly (North Sails) on the winch and Joel Berg (Allyacht Spars) checking the rig.


R42 Venom is currently undergoing preparation for sea trials before the delivery passage  to Adelaide.

We'll bring you a more detailed report on Venom some time next week.


Did you order a Raku 48 Study Book and find that the contents were for the Raku 44? Yes we had a mix-up with our Study Book Covers and some of you were sent the wrong book in the right cover.

If this happened to you please let us know and we will make good on up to date information.


All of the cats in the Raku range have been getting an upgrade with fresh design details aimed at simplifying the construction process and reducing costs. There are also some new layout options. We hope to have new study books for all of the Raku cats available before the end of the year.


If you have already purchased a Raku study book we will be happy to supply you with the the updated version free of charge.


Please note that the Raku 32 is to go into production and kits or plans are not available at this time.




I will be in Australia visiting the Queensland Gold Coast  and the NSW Central Coast between October 16 and 23 plus or minus a day or two.

Let me know if want to catch up to discuss multihull matters.

Tony Grainger


A  Europe trip is tentatively planned for the second half of November.


Two Sensori power cat projects are already confirmed and a number of others in the preliminary discussion stage. The first of the confirmed projects is a 75' LOA dive charter boat that will accommodate 12 guests in  6 double cabins with en-suites. Sensori 75 also provides two private cabins with en-suites for up to 6 crew.


The second is a 52' tour vessels to operate in Asian waters. It is to be built by a well established company specializing in fully infused high speed carbon fibre military vessels. The hulls will be infused in moulds and boats will be available to order in various configurations including private cruiser with up to four double cabins, dive charter, surf adventure and commercial tour operations.


Both boats will be powered by Volvo Penta IPS drives

See preliminary details on the Sensori cats here:


We'll bring you more details on both of the above projects as they become available.




Venom emerged into daylight today and we're hoping to see her on the water soon. See the full R42 Build Gallery here



No one thought of putting wheels under travel luggage………until someone did!

No one thought of putting a canoe body under what would otherwise be a narrow planing hull until in the 1980's Malcolm Tennant did and created a new hull form that has made a significant contribution to improved performance in displacement power catamarans.


See an article on the CS hull form here.


See some preliminary information on the Sensori Power cats here



She's was christened Carbon Copy, later to be known as Mad Max and then Ullman Sails. She has dominated the Australian inshore racing scene for several years and is the current title of the Australian Multihull Championships.


Having won just about every race that can be sailed in Australia in daylight hours, she's heading for new waters, a new owner, and a new crew. A more detailed report coming soon.


details on this concept study coming to the web site soon



Shirley Wodson Photo

Over the first three days of racing Paul Mitchell and crew made it pretty clear that Ullman Sails was  going to be a force to reckon with at Airlie Beach Race Week 2019. By race 5 in the seven race series the combination of a fast boat, good preparation, local knowledge and superb sailing skills had Ullman in a virtually unbeatable position under OMR in the fleet of nine racing multihulls.


The stiffest competition for Ullman came from the four Extreme 40 cats in the fleet with Julian Griffith's The Boatworks fighting off the challenges from High Voltage, Deepwater Collective and Back in Black.


Interestingly the closely matched performance of the four X40's made it difficult for any one of them to dominate in the series against the other three, and this factor contributed to the second placing in the series (and the following placings), being a big step down from first on the points table. 

 Ullman Sails won the series on seven points after dropping a 4 in Race 2. Placings 2,3,4 and 5 (all X40's) were achieved with 18,20,21 and 25 points respectively. The lesson here; one design is great for competitive racing.

It's probably even better if the fleet is big enough to be able to exclude competition that is not in your class.


Julian's second place in the fleet  (first in X40 class) on Boatworks came down to consistency with a tally of four thirds, a first and a fifth in the fleet after dropping an eight in race three.

Placings six, seven, eight and nine were taken by Top Gun, Cosmo, Mad Max and Crosshair respectively.

Flat Chat from the Archives

 Jamie Morris dug this one up from the history box. Apparently never published before. This is Flat Chat on her way to her second line honors and handicap win in the Brisbane to Gladstone Race 2002 under Jamie's command. 

Cruising Cats in Action

A couple of cruising cats smoking in a fresh onshore breeze off the Sunshine Coast. Raku 48 in the foreground.

Building Rudder Blades for R42 Venom

Construction of the R42 trimaran Venom at Australian Custom Multihull Yachts is now well advanced with the appendages and interior detailing in progress. Rudders and daggerboard have been designed by Brett Ellis.

Thanks to Jamie Morris for the pic.


Some Great Shots of 66

Thanks to Paul Degan for some great shots of 66 from her time in Sydney. 66 has now been sold and shipped to Tahiti. Let's hope we can expect more shots from the new owners- with coconut palms and and coral reefs setting the scene.

Interview with Sailmaker Ben Kelly

The Trimaran Spirit team interviews renown sailmaker Ben Kelly at his Brisbane loft. Jason Gard is asking the questions and Claudia is on the camera.

Prophecy having a ball on Moreton Bay

Thanks to Graeme Henderson for pointing us to some nice vid's of his Spoon Bay trimaran Prophecy racing and cruising on Moreton Bay including competing in a WAGS race that you can see here on Prophey's YouTube Channel..

 Prophecy is a Spoon Bay 10.6 now extended to 38'/11.6m LOA

R42 Builder Interview with Jamie Morris

Jason and Claudia from Sailing Trimaran Spirit have recorded an interview with skipper/builder Jamie Morris on site at the build of the R42 trimaran Venom currently under construction at Boatworks on the Gold Coast.
Jason on micrphone and Claudia on the camera. I think we have a budding interview team here with more to come on this project.
See the interview here:

Check their other videos on their You Tube Channel

Article on top down furling

by Andy Rice interviewing Bjarne Lorenzen

In part three of this blog series, Bjarne Lorenzen of sailmaker Doyle O’leu explains the benefits of top-down furling, one of the big developments of the past decade which has trickled down to the cruising scene from the Volvo Ocean Race. See the full article on the Upffront web site 


Ellis Engineering to design foils for R42

We are very pleased to be able to announce that Ellis Engineering has been appointed to design and engineer the rudders, elevators, C foils and daggerboard for the R42 trimaran under construction at the Boatworks on the Queensland Gold Coast.

Brett Ellis has extensive experience in composite foil design having worked on projects including Artemis Racing, Ragamuffin 100, GC32 foiling cat, Alinghi Maxi Cat, and most recently the modified Seacart 30 Morticia which he crewed on at the just completed Airlie Beach Race Week.

Learn more about Ellis engineering at

ULLMAN SAILS claims the trophies at Airlie



Paul Mitchell and crew sailed  convincingly to take their 10m Cat Ullman Sails to victory in the 2018 Airlie Beach Race Week series for the second successive year. Ullman Sails took first place under OMR and on elapsed time in six of the seven races, only relinquishing the first and second positions in race 6 after returning to the marina before the start to replace a broken beam bolt.


The photo is just one of series of great shots from the steady and ever perceptive lens of Shirley Wodson See her full gallery of the series here;…/Airlie-Beach…



Ullman Sails on the Pace at Airlie 2017

Ullman Sails photo by Shirley Wodson
Ullman Sails - Winner Airlie Beach Race Week 2017

Purple Haze in Clear Air

Congratulations to Alex McMillan and crew of Purple Haze for taking out the double in the Bay to Bay Race on the weekend. Purple Haze, an Essential Eight, took out the line honours and handicap trophies in the two day event held on Hervey Bay in Southern Queensland.

The photo was taken at Hamilton Island Race Week

Soul is back in Thailand

photo of catamaran Soul Phang Gna bay

Chincogan 52 Soul is back in the Land of Smiles. New owners Mike and Sarah Mason from New Zealand kindly sent us this fantastic shot of Soul taken at Phang Nga Bay.

Mike reports;  I sneaked off in the kayak just after sunrise to get that one knowing it was such a spectacular backdrop.  We loved exploring the top end of PhangNga Bay.  We had hardly used the kayaks coming up through Indonesia and were wondering if we could justify their existence but we used them everyday up there and didn’t use the dinghy at all.  The Hongs are spectacular!!



Click on the pic for a bigger image - it's a great shot.

Meetup at Mets - A Great night in Amsterdam

Meetup at METS 2016 was a resounding success with thirty or more multihull enthusiasts turning up for food, drinks and camaraderie on a cold wet night at Bar Mowgli in Amsterdam.

Those present included boat owners past and present and future and a number of marine industry professionals including Lorraine Murray and Nick Cossich from ATL Composites Australia, Johan Breder (composites engineer with Southern Spars), Torbjorn Linderson, the multihull man with Southern Spars, and Nigel Irens and Benoit Cabaret.

It was a great night to exchange stories and make some new connections. Let’s hope we can make it happen again next year. Thanks to Davide Vizzini for the great photos.

Great Shots from Shirley Wodson at Airlie Beach Race Week.

Shirley has grabbed some great shots of the fleet racing at Airlie Beach Race Week including Mad Max and Warren Innes’s Barefoot.

There will be more of Shirley’s work coming to our pages. You can check out her work and purchase hi res photos on line here:

Mad Max is Boss Hog

The Boss Hog Trophy is named for Don Algie, founder of Race Week and longterm sponsor with Hogs Breath Café. The Boss Hog Trophy is presented to the crew that best sums up the spirit of Race Week, displays sportsmanship and stands above the rest over the course of the regatta, on and off the water.

This year, the trophy was presented the trophy to APC Mad Maxi, Tony Considine’s Grainger 10 skippered at this regatta by George Owen. APC Mad Max won an incredible six from six races against stiff opposition. (Quoted from ABRW press release).

Photo by Shirley Wodson


Reviving Memories of a Quick Boat

Flat Chat had a pretty successful racing career in Australia under various owners including two Brisbane to Gladstone Race wins under the command of Jamie Morris. She's been in New Zealand for several years now. Thanks to Jim Gard for posting a couple of classic pics on our Facebook visitors page. This is Flat Chat going, well …… flat chat!

TR60 Custom Cruising Trimaran

This version of the TR60 trimaran features three private double cabins, (all with at least a metre of headroom over the berths) a roomy saloon and cockpit, and twin helm stations with good forward vision. It's being designed for a customer who wants to visit exotic cruising grounds and isolated surfing locations around the world. We'll have more details in the trimaran pages soon.

New 8.5m Sports Cat

What would Mad Max look like if we redesigned her today? Probably a bit like this 8.5m cat we're designing for Johannes Romkes. The underwater lines bear a close resemblance to the hull shapes we used on Mad Max.

The beams and centre pod are demountable. Johannes knows his way around composites and will be building the boat himself. We are looking forward to seeing this project get started.