The hull was built of aluminium, married to a composite sandwich deck using a combination of S glass, carbon fibre and Kevlar. The hull was built by the Maas brothers, who had built Lou Abrahams' 46-foot S&S design Challenge III two years prior. Weight saving was sought in every aspect of the boats' construction, where the hull plate thickness was lighter than contemporary aluminium yachts of the same size, with additional frames to provide extra strength. In addition to the composite deck, the boat sported a Kevlar liferaft box, a carbon fibre steering wheel and an interior fit-out utilising Klegecell board and a teak veneer covering. The rig was based around a Zapspar section, developed in conjunction with Frers, and she flew North Sails.
The boat was commissioned by Edwards with the Southern Cross Cup and the 1982 Pan Am Clipper Cup in mind, where it was felt that the steady breezes and time-on-distance handicap system used in Hawaii and the US would encourage bigger boats rather than minimum-raters.
|Margaret Rintoul III under construction|
|Margaret Rintoul III launches over a wave during the boisterous conditions of the 1982 Clipper Cup (photo B Brown, Yacht Racing/Cruising)|
|Margaret Rintoul III became the feature of a North Sails magazine ad in the 1980s after this epic capture during the fresh conditions of the 1982 Clipper Cup|
|Margaret Rintoul III competing in the 1982 Clipper Cup also featured on the cover of Yachting magazine (December 1982, Guy Gurney)|
|Tomahawk (ex-Margaret Rintoul III) competing in the 1984 Clipper Cup (NZ Yachting magazine)|
Margaret Rintoul III/Tomahawk is presently (November 2018) lying in Lake Union Seattle and is for sale.