Van Munster Gp 26
Morisset, 2264, Australia

Van Munster Boats
5 Kalaf Avenue
Morisset,NSW 2264

61 2 49 **** click to reveal


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Listing ID 4848 Length 7.9 Metres
Condition New Type Sail
Make Van Munster Model GP 26
Number of hulls 1 Hull Type Fibreglass
GP 26

Simple - Fast - Fun

The GP 26 is a Grand Prix "BOX RULE" racing yacht introduced and administered by the International ORC organization. This level rule class (similar in concept to the TP52) is designed to ultimately provide close class racing (without time allowance or handicap system), be fast, fun to sail, sound and seaworthy with considerable longevity. The structures are designed and built to ABS standards and the GP 26 box rule complies with ORC Cat 4 safety regulations for short offshore racing capabilities.
Owners have the opportunity and flexibility to select designers and builders to create the fastest boats within the tight shape and construction controls of the box rule. The light displacement combined with generous upwind sail area set on a simple carbon fiber fractional rig (no runners) with non-overlapping jibs and large asymmetric kites simply provides the GP 26 with exciting performance at an affordable cost.

The class has a sensible maximum crew weight of 340 kg which keeps crew to a minimum. The GP 26 is the perfect yacht for the club sailing enthusiast who wants to go fast at an affordable price. An initial study and trial rating certificates suggest that the GP 26 will be very competitive against larger more expensive production cruiser/ racers. Being light weight and easy to sail short handed makes it perfect for those special summer twilight evenings with friends and family.

With a light displacement the boat is just the right size to also adventure to the larger annual domestic race week regattas such as Geelong, Airlie Beach and Hamo cost effectively by road. For the more serious yachtsmen the class also offers the ultimate opportunity to experience international level at the global world championships. The first GP 26 class world championship will be held at Punta del Este - Uruguay in January 2009.

Design Brief by Fred Barrett

In 2007 a local Sydney yachtsman commissioned the design for a new class of yacht in the range of 26 feet. This was at a time when the newly formulated GP26 rule just beginning to take off, particularly in South America. It was quickly decided that the new design should reflect the GP26 rule and indeed be the first commissioned and built GP26 in Australia. Two yachts are to be pulled from the tooling in the next couple of months and the build work has begun in earnest to have these two yacht sailing in the next Aussie Summer, with possible Geelong and Audi race weeks in mind.
The design will be sailed predominantly in Australia, along the Eastern seaboard and so the hull form needed to particularly strong on offshore conditions as well as being potent in the light to moderate breezes seen throughout the year.

It was then decided to have involved a recognized builder and Brett Van Munster of Van Munster Boats in Morisset, NSW was a clear choice given his excellent results with skiff building here in Australia. In choosing Van Munster Boats we have a small and dedicated team able to produce a boat to the required weight and to an extremely high level and we appreciate Brett and his team coming onboard.

The design work has been extensive with a matrix of boat shapes tested and culminating in Boat "I" which we felt best represented our initial desires. The GP26 rule clearly defines the rig and sail parameters and so this is our fenced in area from which to place the best combination of hull shape, appendage and bulb configurations along with deck layout and the structural plan. The rule requires ABS to be followed and in setting up the structure and the result is a robust, but relatively lightweight package, that given the required use of E-glass and Epoxy laminates makes for a cost effective approach. It could be argued that the use of carbon in future rule amendments could save cost, due in part to the need for less laminate weight but given the ABS rule, for this size of yacht the use of more traditional laminates will serve the rule well.

Apart for the basic setup of the hull, deck and supporting structure the rule requires a rig weight, at 50kgs this is quire robust and considering the rule required single spreader setup this is perhaps a good thing. The trick comes in determining the quantity of carbon laminate in the mast tube, certainly adding more can result in a very stiff rig setup, but of course at a cost. Two options have been considered for this design. An entry level package supplied by Composite Spars and Tubes or a slightly more sophisticated package through Southern Spars. At this stage the two builds currently planned at Van Munster Boats will undergo their construction with a final choice of rig package based on the budget of the client and in any respect either choice will be aimed at the GP26 rule and provide the best option for the budget at hand.

Appendage design is tricky, small is fast, bit only with speed. Big is best but comes with more drag. In this case we went for the fast option and the devil is always in the detail and how the rig combines with the side force developed by both the keel fin and rudder blade. In the same way the bulb design work looked at short and long forms. The longer bulb chosen reflects our best combination of keel fin weight (rule constraints on keel width and construction) and bulb mass. Getting as much lead as low as possible is the key to getting the righting moment up and perhaps trading off some BWL to get the up-range performance right when heeled along with lighter air modes in general by reducing wetted area.

The deck layout is race orientated, with a choice of longitudinal or transverse headsail sheeting arrangements, again the final choice will be made based on the intended racing of the yacht. With windward leeward course racing suiting the longitudinal approach with in-hauler for tighter sheeting angles and more offshore orientated course racing with the transverse setup. The cockpit is large, wide and shallow for great crew traffic throughout racing and the cabin detail reflects the best way of getting through the IMS based internal headroom and cabin plane requirements. The hard chine / angular approach to the cabin also comes in handy when setting up hardware.

Deck hardware is what we believe to be minimal given the nature of racing the yacht will undertake. There are no line tunnels for halyards, thus saving weight instead we will adopt underdeck jammers and turning blocks to control halyards and other control lines tucked away to keep things clean on deck. All deck hardware will be from Harken through Carl Watson and his team in Sydney. The use of soft padeyes and other weight saving approaches will be utilised.

The final result will be a fast, fun small yacht really a modern day approach to the quarter tonners of old and a new entry level class that is recognised by the ORC and deemed a Grand Prix class, surely a great thing to want to build and go racing in.


ORC Special Regulations to Cat 4
Length Overall 7.9m
Maximum Beam 2.55m
Max Draft 1.9m
Max Displacement 1050kgs
Keel Weight 500kg
Max Crew Weight 340kg

Sail Area

Main 24.7 m2
Jib 15.35 m2
Asymmetric Spinnaker 70.49m2

Hull and Deck Structure

All structures designed and built in accordance with the ABS
Cored hull and deck laminates using E-glass/SAN CoreCell Foam Core
Integral moulded internal structure for keel and rig loads
Non-slip surface on deck, coach house and cockpit
Moulded toe rails
Garage Style sliding hatch
Composite chainplate, headstay and backstay attachments
Exterior finish in two pot paint finish in Awlgrip