Mackay Complete Hull

SHIPPING AND CUSTOM COSTS NOT INCLUDED IN PRICE

Specifications

Hull Length                      4.2 m

Beam Length                   1.63 m

Mainsail Area                   7.4 m2

Headsail Area                   2.8 m2

Spinnaker Area                9.0 m2

Boat Weight                    100 kg

Hull Weight                      80 kg

Hull Material                     GRP

No. of Crew                      2

Opt Crew Weight              110 - 145 kg

Number of Trapeze           Single

Designer                          Christian Maury

420 Class Association website: http://www.420sailing.org/

The Boat

The 420 is one of the best options to learn the ropes about two-person dinghy sailing. Crews learn how to tune a boat, set up control systems, trim sail combinations (jib, main and spinnaker together), work on downwind and upwind techniques, and importantly, learn how to work with another crew.

The Class has attracted many top sailors to it, providing a learning platform that has led them into successful Olympic campaigns and big boat careers.  

The Hull

The 420’s design and class rules gave us the opportunity to build a boat similar to how the Mackay 470 is built in terms of the mould structure and look of the boat. 

The Mackay 420 hull shape was developed by naval architect Kevin Trotter. Kevin has designed very fast dinghies here in New Zealand over the years. Using the latest design and analysis software, along with the luxury of time we were able to evaluate the expected performance along with the look of the boat. 

Looking at where crews tended to sit in the boat in different conditions affected where we pushed the displacement curve of the boat.   Additionally, Kevin's skiff designs gave valuable insight into the way the rocker curve and buttocks lines should run through the middle and aft sections.

The hull is made from a polyester e-glass fibre, using foam core ribs and core mat panels.

The Mackay 420 deck to hull joint system is the same as our 470s, which allows for the same exceptionally strong but light gunwale arrangement. This extends around the bow and across the transom.

We have also borrowed some other features off the 470.  As an example, the way the mast partner is fitted to the deck after the boat is built allows the bulkhead in front of the mast to be more vertical and closer to the mast.  This is better for rig tension and weight distribution.  It also improves the look of the boat giving it a longer foredeck.