Page 3 - Panamuna Details Oct 5 2020

Replacing "Scorn IV," winner of last
season's Round Port Phillip race, A C. Fin-
lay's new craft is also a combination of the
ideas of owner and builder.

type is the difficulty in providing them with sufficient sail
area to keep them sailing at their best in light weather.
With this design, wetted surface has been reduced to a
T AKING shape in the yard of Eric Montgomery at minimum, while the ratio of sail area to displace ment and
wetted surface is understood to be adequate to ensure that
North Melbourne (Vic.) is Panamuma, a new
racing sloop who this season will replace A. C. Finlay's she will give a good account of herself under all
conditions. Furthermore, provision has been made for a
well-known and successful Port Phillip racer Scorn IV, masthead genoa and a masthead spinnaker, which are not
sold to a Sydney yachtsman Fred White recently. shown on the plans.
Construction of the new yacht is well under way and she
should be ready to take the water in Decern ber. CONSTRUCTION
Panamuma is a true successor to Scorn IV in as much as One of the main intentions of designer and builder of
she has been designed and built by Montgomery to the this type of yacht is to make the hull strong yet of sufficient
order of Scorn IV’s original owner, and in both cases the lightness to enable her to perform according to her
resultant design has been a com bination of Finlay’s ideas mathematical conception. The failure of many a light
with those of the builder. displacement yacht to sail up to expectations is often traced
However, this is as far as the similarity to Scorn IV goes, to the fact that they come to the start ing line overloaded.
for the new sloop is entirely different in concep tion from It is easier to overload a light displacement boat than a
any previous Scorn, and has been designed to race on Port heavy one, and a glance at some simple figures illustrates
Phillip in company with 8 and 9 metre yachts, at the same the extent to which overloading can effect the performance
time keeping in mind the R.O.R.C. handicapping used for of a light displacement hull.
the Port Phillip annual classic race of 90 miles — the Lady For instance, if a yacht of 25,000 lbs. displacement is
Nelson Trophy. Obviously she is a type of yacht which loaded down beyond her lines by 500 lbs. of surplus gear
would not suit all yachtsmen, for she has no preten >jom to and crew, this represents an excess of 2% of its
being a cruising yacht. With a waterline length of 33ft. and displacement: but with a yacht of similar length and beam
a maximum beam of 8ft., the emphasis is definitely on of say 10,000 lbs. displacement, this would represent
speed. overloading to the extent of 5%, which is more than
Although her displacement has not been disclosed, it is enough to upset calculated performances.
understood that it is to be extremely light and there appears Great care and planning has gone into the con
little doubt that she will be very fast through the water. One structional details of this design, and some unusual
of the serious drawbacks in attempting the design of a light composite innovations will be introduced which neither
displacement of this designer nor owner has as yet indicated; the object has
been to construct the hull of adequate strength but with
sufficient reserve of bouvancy to take care of surplus gear
and equipment, which is unavoidable in yacht racing.
Po9e 192 S E A C R A F T October 1950

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