114 Boating New Zealand
a catamaran ofers
benefits that
appeal to families- specifically,
stability and
roominess that
only come with a
considerably larger
monohull.
RIGHT The 115hp
Yamahas propel
her to a top speed
of 35 knots.monohull. Also, the eicient hull proile is driven by modest
powerplants – twin Yamaha 115hp four-stroke outboards for
Ostra. A shallow draft also enables access into places – and even
beach-parkings – of-limits to monohulls.
On our day with Ostra (Daryl was in Auckland during
the recent race stop-over) the entire family came out for the
occasion, and everyone clearly loves the boat. She’s an attractive
vessel – clean lines and a simple but striking two-tone colour
scheme – grey hull, white cabin and tinted windows.CONSTRUCTION
She was professionally built in partnership with Wellington’s
MG Composites, though to minimise costs Wislang was
actively involved and put in many weeks of work between
sailing commitments.
he hull bottom comprises three layers of 6mm Meranti
BS 1088 marine plywood. Sides are 12mm gaboon BS 1088marine plywood and the hull frames are 12mm BS 1088
plywood with a 12mm plywood doubler in certain areas.
Deck and cabin are a mix of 12mm and 9mm BS 1088
plywood. Hulls are sheathed in a generous E glass/epoxy
laminate inside and outside, while the hardtop’s sheathed
with the same laminate on the outside. It’s all been faired and
inished to a high standard. he paint system is from Resene,
with Durapox epoxy urethane primer and Acrythane acrylic
urethane gloss top coats.
For buyers of the design package, it comes with .dxf iles
for cutting the panels, a detailed 2D construction booklet and
3D step-by-step assembly computer renderings. Says Wislang:
“I was instantly impressed with the way all the panels went
together.”
He was also impressed by the stifness of the resulting
structure, thanks to the precision of the interlocking cross
members. It all results in a high-quality build with very ine