Sailing Boat Design


GP33 version2

The GP33 design has been modified as GP33v2 adding more weight into keel and changing construction method and detail designs for reducing building cost.

GP33 characteristics

GP42/GP33/GP26 class rules were developed by ORC in 2005 based on the success of the TP52 box rule class. Since then the GP42 was firstly focused in Europe followed by the MedCup circuit. Since 2008 some GP33 and GP26 boats have been launched around the world.
The GP33 has the following characteristics,

  • light displacement
  • high weight ratio of bulb
  • 2 spreader fractional rig
  • non-overlapped jib
  • large masthead geneker

So the boat speed is very fast for the length especially in downwind.
The GP33 box rule limits the overall length, beam, draft, displacement and sail plan. Designers can freely create the hull shape, the appendage package and the balance on the stability and helm suited for the best performance within the limits and the design concept.

Owner's comment

"This boat is very fun to sail and easy to steer than expected. Very satisfied with the performance!" said the 1st boat owner. Please feel free to contact to ACT for trial sailing.

Scientific design approach

The scientific design approach was totally applied using the most advanced CFD and VPP. Various ideas to reduce the structural weight were included since the E-glass was used for the hull and deck strutures to reduce the building cost as a production boat. The carbon is the standard for the rudder blade, stock, tiller and the mast.


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