Masthead28_Dec2013 H.pub - page 10

The Masthead
Dec. 2013 Page 10
B
each cats
After discussing the origins of multihulls with the
pirogues in Oceania and with 19th-to-early-20th-century
racing multihulls, let us delve into the post-war catamarans.
Out of hundreds of beach catamarans developed in this
period, with some built in a few numbers locally and with
others seeing worldwide success, we will shortlist only a few
here. While the history of catamarans has already been told
by others, the idea here is to relate the evolution of hull
shape through a couple of models which have characterized
production.
Yvonne
It may be surprising that Nathanael Herreshoff never men-
tioned the Oceania pirogues, but in Australia, dinghy builders
Charles Cunningham and his son Lindsay, then a student of
engineering, were fascinated by these early Pacific multi-
hulls. In 1952, they built a prototype, which, two years later,
they developed into a 20ft (6.09m) catamaran, christened
Yvonne
after Charles' younger sister. In 1956 Charles & Lind-
say won the first national championships in the class, which
is still raced actively to this day.
Part 2
By François Chevalier
In the previous issue, we examined the development of sailing multihulls from the earliest Polynesian outrig-
gers or proas through 19th-century American racing cats and L. Francis Herreshoff’s Sailing Machine and
Sailski
. In this issue, we’ll follow sailing-multihull development into to the late twentieth century.
Yvonne
Catamaran
Designer: Charles & Lindsay Cunningham
Introduced: 1954
Length Over All: 6.09m
Load Waterline Length: 4.66m
Beam: 2.73m
Hull beam: 0.45m
Draught: 1m / 0.18m
Air draught: 7.83m
Weight: 236kg
Mainsail area: 12.8sqm
Jib area: 4.8sqm
Asymmetric spinnaker area: 23sqm
Build: marine plywood or GRP
Continued next page
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