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Oppi Stack

The Oppistack is a stackable yacht designed for portable sailing schools. Oppistack’s design focuses on how the yacht is transported efficiently, maximising the number of yachts the sailing school will be able to transport, and the number kids that will be able to experience sailing.


Massey University
Ngā Pae Māhutonga, The School of Design
New Zealand

Faculty Advisors: Emma Fox Derwin, Lyn Garrett, Jason Mitchell, John Wells

Design: Tim Arbuckle

The Oppistack is a stackable yacht designed for a portable sailing school. The Oppistack design has taken the optimist yacht hull and redesigned it to be stackable, in order to suit the needs of a portable sailing school. The Oppistack is designed around the same ethos and ideals as the Volvo Sailing programme that travels around New Zealand six months of the year and sets aside three trailers to give children the chance to try out sailing. 

While learning how to sail, the children benefit by gaining self-confidence, problem solving and logical thinking skills, as well as a respect for the environment. Through the Oppistack design, these benefits from sailing have been the focal point of how the user group would interact with the yacht to enhance the user experience. 


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The rigging of the Oppistack has been broken down into steps and they are colour coded, making it easier for coaches to communicate to the beginners about what they need to match, for example, ‘blue with blue and red with red’. The mast is attached in the hull with a bayonet locking system, which gives the users haptic feedback with the clicking and locking feel and sound. This is the final step before sailing, to give the children a boost of confidence.

The Oppistack is made with rotational moulded polyethylene. This manufacturing technique provides a robust and buoyant yacht ideal for first-time sailors and for transporting across large distances.

The ideal number of yachts per stack is about eight. This makes each stack to be only 1100 millimetres high. Each yacht when de-rigged and prepared for transporting carries all the necessary parts for sailing. The mast and boom fit down the keel line which has a special slot designed for it holding it in place. The entire folding component folds down flat, and the centreboard and rudder sit within the cockpit.

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