Malua - an Adams cruising yacht
The hull is of a medium to heavy displacement type, which has
a Lwl/Displ ratio of 255. The hulls stability is derived from buoyancy
amidships with a 40.35% ballast ratio and almost 4m of beam. The vessel
has SA/Displ ratio of 18.5 which is within the cruiser/racer category.
The construction conforms with Australian USL NSW Waterways survey
requirements. It was passed into survey 2C when launched. The hull is of a solid GRP lay-up with a hull thickness
from 11 mm on the topsides progressively getting thicker to 26mm around
the keel. Topsides total 5400g ‑ 4200g chopped strand, plus 2 layers of
600 biaxial. Centreline/Keel total 9600g ‑ 7200g chopped strand plus 4
layers 600 biaxial. Layup here... cloth layup here...
The deck is foam cored ranging in thickness from 28‑32mm to
give maximum stiffness on the foredeck and coach roof which is
reinforced with GRP deck beams complying to NSW survey requirements.
Laminate: 4200 g total with 2 layers of 601g biaxial. Core Material:
cockpit, foredeck, roof - 20mm foam. Cockpit sole, winches - 18mm
plywood. Side decks, roof 3‑4 layers - 3 mm coremat. Deck layup here...
A lead keel casting of 4,500kg is fitted internally within the
integrated hull and keel. It is fibre glassed into this area. Internal lead here...
The mast compression post is made from a 100mm stainless steel
box section with 12mm load distribution plates which are bolted to
three mast step bearers and the mast base. The chainplate knees 50 x 12
mm 316 s/s with 3 mm s/s backing plates. 25 mm plywood. 4200g CSM
laminate and glassed as an integral part of the hull. Split backstay is
bolted through transom. Forestay attached to bowcap. Inner forestay
attached to collision bulkhead. Mast step here...
The 325 and 388lt integral water and a 400lt black water
holding tank are built into the hull and beneath the sole to increase
stability and capacity. They are protected by two coats of clear epoxy
followed by three coats of a non‑tasting food grade epoxy tank lining.
A 250lt 2.5mm stainless steel drinking water tank further supplements
the water carrying capacity. Water tanks here...
There are two diesel tanks – a 182 lt stainless steel
under the sole and a 258 lt under the port berth. The tanks are 2.5mm
thick stainless steel pressure tested with fuel outlet drawn from a
sump which is drained and cleaned as part of regular maintenance. The
fuel passed through two Racor 5 micron filters plus the engines normal
fuel filter. The 50hp Yanmar diesel used only 2.2 lt per hour at
2000 rpm which gives a 1000mm range at 6 knots. Aft cabin fuel tank here
Drag link system ‑ 3 shaft bearings. Bronze with fiber insert lower bearing.
Delrin middle bearing glassed 3600g CSM. Machined housing incorporates
lip seal, roller bearing race which takes rudder load. The skeg hung
rudder has 5 x 6mm tangs welded around the 50mm rudder shaft and
internally integrated into the rubber construction. Rudder stops
prevent excessive turning. Rudder bearing here...
The mast section is double spreader IM23R section (230*160RCB 6061T6) with mast taper. The batten cars are Antal size 40. The rigging is made from 316 stainless steel 1 x 19 wire. Wire sizes are: Forestay -10mm, Inner Forestay - 7mm, Fore and aft lowers - 10mm, Cap shroud - 10mm, Intermediate - 8mm, Twin Backstay - 8mm, Running Backstay - 7mm The standing rigging was replaced in 2018 in Tasmania.
A gold South African Kruger Rand sits under the mast.
All above deck stainless components are manufactured from 316
stainless steel. The Pulpit, pushpit arch, stanchions, handrails and
chainplates are all welded and polished. All stanchions and railings
are 1 inch tubing with 5mm plate bases fastened with 4 x 10mm stainless
steel bolts. Major s/s arriving here...
4 cylinder, freshwater cooled, 50 hp Yanmar direct drive
2.64:1. 80 amp alternator. Engine beds: Seasoned hardwood. Engine
mounts replaced in 2014. Shaft: 316s/s.1 ½” Keyways fore and aft.
Bronze
propeller skeg laminated 4200g CSM. 18 " Autoprop folding three blade
propeller or three blade fixed prop. Polyflex flexible coupling
connects shaft to engine. PSS
dripless shaft seal is used. Exhaust high riser fitted to fibreglass
water lock muffler. Fiberglass and flexible rubber exhaust hose to
outlet. Raw water inlet filter is connected to bronze through hull with
external guard. engine bearings here... more at hull construction here...
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