SPECIFICATION FOR JONMERI 482
Designer:
JORMA NYMAN / KAMU STRÅHLMAN
Builder:
MAESTRO BOATS
Tjäruvägen 35
FIN-68550 ÖJA, FINLAND
TELEPHONE: 358 6 834 0506
TELEFAX: 358 6 834 0526
E-mail: info@maestroboats.fi
Note: These specifications are believed to be correct at the time of printing. Due to a continuous program of product development and improvements, Sailcraft Ltd reserves the right to change specifications, material, and equipment without prior notice. No such alterations, however, will be retroactive for yachts already delivered or under construction.
CONSTRUCTION
HULL
The hull is hand laid fiberglass over a balsa core. Unidirectional roving and mat roving is used to create a rigid but light and well insulated structure. The use of high grade unidirectional roving contributes greatly sound as well as thermal insulation and increased strength. The hull is specially strengthened at the areas of high load with transverse and longitudinal roving which is oriented in the direction (40-60 degrees) of the load. The bilge stringers are strengthened with unidirectional roving.
DECK
The deck is of hand laid fiberglass over a balsa core providing a high degree of rigidity and insulation. All through bolt areas, such as winch bases and genoa tracks bases are of reinforced, solid glass. The deck is fastened to the hull with 3M5200 clue and through bolting. The deck is teak laid as well as the cockpit area.
GEL COATS
All gel coats are of the highest grade, abrasion resistant type available. They are brushed on by hand rather than sprayed, resulting in an even, smooth coat, void of air pockets and bubbles. This method assures a long life to the gel coat and precludes the dreaded blistering that is found in boats built using air compressors.
BALLAST
The ballast consists of 5800 kg of cast lead containing 4 % antimony. It has a fin keel configuration. Keel bolts are 36 mm stainless steel.
RUDDER
The rudder is fiberglass laminated, cantilevered and balanced. The rudder stock is made of acid resistant steel (diam. 100 mm).
MAST STEP
The mast step is made of stainless steel and bolted to reinforced stringers and floors.
CHAIN PLATES
The chain plates are of stainless steel, incorporated through to laminated reinforcements in the transverse bulkheads with through bolts. Stainless steel back-up plated are used to spread the loads properly.. Grounding is made directly to the keel bolts.
TOE RAILS
Toe rails are of standard L-shape aluminum. Custom made of teak is optional.
STEM HEAD FITTINGS
Custom built of stainless steel (10 mm) with double brass chain rollers resulting in an exceptionally strong construction.
BULKHEADS
All bulkheads are made of marine grade waterproof teak plywood. Special attention is paid to their bonding to the hull, tapering their edges and neatly glassing the bulkheads flush to the hull.
BILGES
The entire cabin sole is easily removed for full inspection of the bilge area.
STEERING
The steering system consists of:
Edson wheel steering system with cable and sheaves attaching to the quadrant.
Engine controls, instrument panel and Suunto compass, type 165 mounted on the pedestal. Emergency tiller.
INTERIOR
GENERAL
Teak or marine teak plywood are used throughout the interior. Teak surfaces are varnished throughout four times and hand rubbed to a satin finish. The cabin sole is teak and wholly marine plywood and completely removable for access to the bilge area. The hanging lockers are fitted with rods or hooks. Locker are vented with louvers. All companionway ladders are teak with non skid surface.
FOREPEAK
Sail stowage is accessed from the deck through a watertight hatch. Next to it is another watertight compartment which can accommodate the anchor windlass and chain.
FORWARD CABIN (Owners cabin)
In the private cabin to port has a double berth and several stowage lockers. There are a comfortable sofa and a large hanging locker to starboard. A large head is forward.
FORWARD AND AFT HEADS
Both heads are one piece fiberglass modules for ease of maintenance and an attractive appearance. They incorporate a wash basin, built in mirrors, watertight stowage, shower, counter and upper lockers with mirrors on doors. They are fitted with hot and cold pressure water, manual toilets, hand shower with flexible hose and manual shower sump pump.
MAIN SALON
The focus of the main salon is a custom dining table flanked by a U-shaped settee. Behind the settees there are two sea berths, one on each side. Main salon table is high quality wood work.
GALLEY
The galley is located to portside. Opening portlight and a hood are stationed above Force 10 three burner propane stove with an oven. Stowage for the propane tanks is under the helmsman seat. Stainless steel sinks with faucets for hot and cold fresh water and sea water are provided. The refrigerator box is insulated with foam and GRP and lined with stainless steel. There is ample counter space, cupboards, dish drying racks, stowage lockers, cutting boards and drawers, as well as built in garbage container and space for a microwave oven. Opposite to the galley there is space for the freezer and appliances such as dishwasher.
NAVIGATION STATION
The navigation area is located in the front center of an aft cabin and includes a good size chart table and drawers beneath. The space under the chart table is sufficient for the laptop computer and associated books and equipment. Underneath of it is the ample chart drawer. There is space for displays of different instruments VHF and SSB radios. The main circuit panel is on the upper part of the navigation station.
AFT CABIN
There are large single berths on the starboard and on the port side of the aft cabin. There is a fixed seat to starboard and a swivel seat forward facing the navigation table, mounted on the bulkhead. Ample stowage such as drawers and wardrobe are provided to starboard and to port. The head compartment is to port. There is a companionway from the aft cockpit down to the aft cabin.
LIGHTING ARRANGEMENT
INTERIOR
Adequate amount of lights are installed in each cabins, galley and navigation area. These include one reading light over each berth a chart light above the navigation table. Fluorescent lights are placed at the galley and above mirrors and red night lights at the chart table and at the companionways.
EXTERIOR
Exterior lights consists separate red and green lights on the pulpit and stern light on the pushpit and deck light and motor light on forward side of the mast. A tricolor and an anchor lights are at the top of the mast.
ENGINE INSTALLATION
ENGINE
Nanni Diesel 5.250 TDI - 62.6 kw Engine
Cylinders: 5
Power output: 85 Hp
Cylinder capacity: 2,499 liter
Flexible mounting with AquaDrive (Scatra) coupling to propeller shaft
Engine controls mounted on steering pedestal.
FUEL SYSTEM
Stainless steel tanks, fuel capacity approx. 600 liters. A Water separator and a fuel filter on the fuel line. Deck filler cap marked FUEL. Tank vented to coaming. All fuel lines and shut-off valves are according to CE standard.
EXHAUST AND ENGINE COOLING SYSTEM
Fresh water cooling. All sea cocks and through hull fittings are according to CE standard.
PROPELLOR AND PROPELLOR SHAFT
Made of acid resistant steel. Employs Volvo shaft seal and the aft part support with rubber bearing. Zinc anode on the shaft. Two bladed folding propeller included.
ELECTRICAL SYSTEM
SYSTEM AND WIRING
System consists of MasterVolt 12 V DC battery control system with master switches DC volt and Amp meters. Automatic safety switches and indicating diodes (total amount of 30 including spares) are on the main switchboard located at the navigation area. Heavy wiring is used to prevent excessive voltage loss.
BATTERIES AND CHARGER
Three 130 Amps hour service batteries and one 80 Amps hour starting battery. 40 Amps battery charger and 220 V or 110 V as shore power system are provided.
PLUMBING
SEA COCKS
Sea cocks of bronze or acid resistant steel for all through-hull fittings below waterline. The number of sea cocks to be minimized and their shut-off valves to be placed easily accessible locations.
FRESH WATER SYSTEM
Fresh water capacity approx. 600 liters. Stainless steel tanks with a bulkhead, inspection covers, deck filling cap marked WATER provided. Foot operated back-up pump included.
DRAINAGE SYSTEM
Galley sinks are self draining. Head wash basins and showers are drained to sump tanks and pumped out by a manual sump pumps with the outlet above water line.
BILGE PUMPS
Two manual bilge pumps, one below and the other in the cockpit. One electric bilge pump included.
TOILETS AND SEPTIC TANK
Manual toilets (Blake) and stainless steel septic tank with through deck emptying connection. There is also possibility to discharge through bottom sea cock.
RIGGING
MAST
The mast is Sparcraft anodized aluminum alloy mast with three pairs of aluminum spreaders and internal halyards. Appropriate exits and halyard sheaves and spinnaker pole track are included.
MAIN BOOM
Tapered, anodized aluminum alloy boom, with appropriate fittings, sheaves and cables. Single line reefing for two reefs. Slab reef for the third reef and reefing lines running through sheaves in boom ends. Single and third reefing lines lead to the cockpit winches via turning blocks.
SPINNAKER POLE
One anodized aluminum alloy spinnaker pole with fittings. Jockey pole with fittings.
RUNNING RIGGING
Spectra robe for halyards:
- 1 Main halyard with shackle
- 1 Genoa halyard with snap shackles
- 1 Staysail halyard
- 1 Spinnaker halyard with snap shackle
- 1 Spinnaker pole lift with snap shackle
- 1 Spinnaker pole down hole
Sheets
- 1 Main sheet
- 2 Genoa sheets
- 2 Staysail sheets
- 2 Spinnaker sheets with trigger latch shackles
- 2 Spinnaker aft guys
Miscellaneous ropes:
- 2 Reefing lines
- 1 Gunningham line
- 2 Preventers for mainsail
STANDING RIGGING
Made of stainless steel wires with end fittings and toggles. Navtec hydraulic backstay adjuster and mechanical Sparcraft Rod Kick boom vang are standard equipment. Hydraulic boom vang is optional.
Rod rigging is optional.
Specification of 1 x 19 S/S wires:
- 1 Head stay
- 1 Back stay
- 2 Upper shrouds
- 4 Intermediate shrouds
- 2 Lower shrouds
- 1 Baby stay
- 2 Running back stays
- Cutter stay is optional.
DECK EQUIPMENT
HATCHES
- Fore peak 1 620 x 520 Gebo
- Forward head 1 620 x 620 Gebo
- Fore cabin 2 450 x 380 Gebo
- Main salon 1 620 x 620 Gebo
PORTLIGHTS AND VENTILATORS
- Fore cabin 2 Fixed Lewmar
- Main salon 2 Opening Lewmar
2 Fixed Lewmar
- Galley 2 Opening Lewmar
- Cockpit bulkhead 1 Opening Lewmar
- Aft head 1 Opening Lewmar
1 Electric ventilator
- Owners cabin 1 Opening Lewmar
1 Fixed Lewmar
WINCHES
- Genoa sheets 2 Harken 64.2
- Spinnaker sheets 2 Harken 53.2
- Halyards and reefs 2 Harken 44.2
- Main sheet and car 2 Harken 40.2
ROPE CLUTCHES
- Halyards and reefs, port 6 (port) Spinlock XT
- Halyards and reefs 6 (starboard) Spinlock XT
- Main sheet and car 2 (port) Spinlock XT
- Main sheet and car 2 (starboard) Spinlock XT
TRACKS
- Main sheet track 1 Harken
- Main sheet traveler 1 Harken
- Terminals 2 Harken
- Genoa tracks 2 Lewmar
- Genoa car 4 Lewmar
- Terminals 4 Lewmar
STANDARD EQUIPMENT:
- S/S guard line stanchions
- S/S Pulpit and pushpit
- S/S handrails in companionway entrance
- Two winch handles, power grip, lock-in,10
- Two winch handles, lock-in,10
- Turning blocks
SAIL MEASUREMENT
Main sail
- P = 17500 51,5 sqm
- E = 5500
Genoa I, Furling
- P = 18300 79,0 sqm
- LP=8620
- T = 17600
Genoa II, Furling
- P = 18300 62,2 sqm
- LP= 7450
- T = 17400
Stay sail
- E = 13300 29,0 sqm
- LP= 4350
- T = 12400
Storm jib
- E = 9700 13,6 sqm
- LP= 2800
- T = 7400
Spinnaker
- SL = 19310 190,0 sqm
- SMW= 10350
- SF = 10350
- I = 19500
- J = 5750
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