Van De Stadt Tonga 56

SPECIFICATIONS

Design no. 428 VAN DE STADT 56 “TONGA”

Aluminium, wood core or steel construction



PRINCIPAL DIMENSIONS

Length over all 17.10 m
Length waterline 14.40 m
Beam 5.00 m
Draft 2.70 m

Displacement (aluminium) 23.40 t
Displacement (wood core) 23.40 t
Displacement (steel) 27.60 t
Ballast (aluminium) 9.30 t
Ballast (wood core) 9.30 t
Ballast (steel) 8.00 t


RETRACTABLE KEEL VERSION

Draft 1.50/3.00 m

Displacement (aluminium) 22.90 t
Displacement (wood core) 23.10 t
Displacement (steel) 27.10 t
Ballast lift keel (aluminium) 8.50 t
Ballast lift keel (wood core) 8.50 t
Ballast lift keel (steel) 7.00 t


Owner:


Designer: Van de Stadt Design
Industrieweg 35
1521 NE Wormerveer / Holland











CONTENTS:


Page

1 GENERAL 3
1.1 GENERAL CONDITIONS 3
1.2 DRAWINGS 4
2 CONSTRUCTION MATERIALS 5
2.1 ALUMINIUM 5
2.2 GLASS-FIBRE WOOD CORE 6
2.3 STEEL 7
2.4 OTHER MATERIALS 8
3 CONSTRUCTION OF HULL AND DECK 8
4 CONSTRUCTION ITEMS 9
5 FINISH OF HULL AND DECK 10
6 RUDDER AND BALLAST KEEL 11
6.1 FIXED KEEL VERSION 11
6.2 RETRACTABLE KEEL VERSION 12
6.3 STEERING 12
7 INTERIOR 13
8 PLUMBING 16
9 MACHINERY 17
10 ELECTRICAL 19
11 SPARS AND RIGGING 21
12 DECK FITTINGS 22
13 PAINTING 23
14 EQUIPMENT AND OUTFIT 24
SPECIFICATION LIST 24






1 GENERAL

1.1 GENERAL CONDITIONS

a. It is the intention and spirit of the specifications that the builder shall construct and equip an ocean-going yacht that is ready for use. All articles of equipment, or boat subsystems, furnished by the owner, shall be specially mentioned herein. Omissions from the plans or specifications, or both, of any items, which, according to generally accepted practice, are necessary for the proper operation of the yacht, will not release the builder from supplying the same.

b. The owner or his authorized representative(s) herein called "the owner” shall have access to the yacht and everything pertaining to the yacht at all reasonable times. Every facility will be afforded to inspectors for the prosecution of their work. All handling of material necessary for purpose of inspection shall be at the expense of the builder. A copy of all reports shall be sent to the owner. The materials and manufactured articles of construction of whatever kind, are to be of the best quality for their respective purposes.

C. The workmanship in detail and finish will be first class in all respects and suitable for the purpose intended.

d. Failure on the part of the architect or owner to call attention to defective or improper work or materials will not release the builder from making good such defects when discovered.

e. The yacht will be built under a permanent roof. The builder will protect all work at all times and be responsible and make good any and all damage from whatever cause to any part of the yacht or its equipment, whether supplied by himself or by the owner.

f. The yacht or a part of the yacht has to be delivered according to the terms of the contract between builder and owner.

g. The equipment and construction of the yacht shall meet all requirements of Lloyd's Register of Shipping, or another classification company as agreed between the owner and the builder.

h. The builder shall keep the yacht and materials intended for the yacht, including all items delivered by the owner to the builder, fully covered under a standard builders risk policy of insurance until delivery has been made to the owner. Indemnity for loss, if any, shall be made payable to the builder and the owner as their interest may appear. A copy of the insurance document will be supplied to the owner.

i. Should the architect deems it necessary or advisable during the course of construction to make any changes in the layout or details, so long as the general style and type of the yacht and its arrangements are maintained, such changes are to be made by the builder, without invalidating the contract and without added expense, provided such alterations are determined before the particular part of the work to which they refer to, has commenced.
No charge for extra work will be allowed unless authorized as such in writing by the owner or the architect. No extra work is to be considered as grounds for invalidating the contract or for delaying the time of delivery and completion of the main contract.

j. The builder is at all times obliged to keep the yacht reasonably clean throughout. Particular care has to be taken that all chips, shavings and other foreign matter is removed and that when the yacht is delivered her bilges and pockets are to be entirely free from such matter.

k. After final inspection and when all details of the plan and specifications have been fulfilled, the yacht will be formally delivered to the owner and upon payment of the balance of money still due, the builder shall deliver to the owner all documents showing clear title to the yacht.

l. The specifications and drawings are intended to co operate and any work exhibited in the drawings and not in the specifications or vice versa, has to be executed the same way as if they were mentioned in both. The architect shall furnish the builder with the plans.

m. The builder is encouraged to provide modifications or changes to this specification to his choice as an addition or deduction. All deviations to this specification must be listed and priced separately as an option.

Any additional drawings, which in the opinion of the builder are required, will be prepared by him and submitted to the architect for approval before the work to which they refer has begun. Any and all drawings and specifications prepared by the architect for the purpose of building this yacht, are to remain the property of the architect and he is to be furnished with one copy of all approved additional drawings prepared by the builder.









DRAWINGS



See list of plans.

2 CONSTRUCTION MATERIALS

2.1 ALUMINIUM

Alloys:

All aluminium alloy plates, bars and sections are to be of type approved for use in saline (sea water) conditions and of types approved by Lloyd's.

Preferred material for plates is:
according to ISO Standard Al Mg 4,5 Mn H 321
according to the international reg. no. 5083 H 321

For extrusion is:
according to ISO Standard Al Mg Si 1 F 28
according to the international reg. no. 6082 F 28

General:

All forming must be done cold and no heating be undertaken. Marking out must be done in crayon or chalk and not by scribing. Care must be taken in all operations to avoid surface damage to the softer alloys. 90 Degrees bending shall not be carried out with a small inside radius. All extruded sections (frames, deck beams, stringers, etc.) have to be continuous.
No seams (welds) are allowed in extruded sections.
In joints, aluminium to another metal, the materials shall be electrically insulated by use of non-metallic insulation material of a non-absorbent type (e.g. neoprene).

Welding:

Only metal arc (MIG) or tungsten arc (TIG) electric welding by the inert gas (i.e. argon) process is approved. Weld material, i.e. wire or rod, must be of a specification appropriate to the marine grade alloys being used. All welding must take place under dry conditions and a minimum temperature of +5 degrees Celsius. The welding place must be protected against drafts.

























2.3 STEEL

All steel plates, bars and sections are to be of a marine quality type and of a type approved by Lloyd’s.
Minimum material properties are:
Yield strength 235 N/mm²
Tensile strength 400 N/mm²
Modules of elasticity 200.000 N/mm²

Surface treatment:
The steel surface should be sandblasted and preserved with an iron oxide epoxy shop primer coating (Weld-a-rite EV 65).
Welding:
Electrodes and other consumables intended for use in welding are to be approved by Lloyd's or other recognized body, and are to be suitable for the type of joint and the patent metal to be welded. Gas-shielded metal welding are to be done indoors. All welding must take place under dry conditions and a minimum temperature of +5 degrees Celsius. The welding place must be protected against drafts.

2.2 OTHER MATERIALS

Stainless steel:
All stainless steel parts, if not specified specially, should be AISI 316 or 316L.

Wood:
A minimum of wood is to be used in the construction.
All wood used in the construction shall be sound, clear and free from large knots, checks, shakes, sap. It is to be well seasoned and of a quality best suited for the work intended. All teak to be Moulmain or Burma teak. Teak occurs as a grating in the pilothouse floor and in the two shower stall floors. All lumber has to be dressed on all sides and edges and to the dimensions given on plans which are for finished sizes.

Plywood:
Where plywood is referred to herein, it shall be of an approved high grade marine quality with good face and core veneers of durable species. The veneers are to be bonded with phenol resin or others of equally proved marine quality. The material must conform to BS 1088 or standard equivalent.
Plywood construction is to be as light as is consistent with the load bearing requirements.

Fastenings:
All bolts, screws and tapping screws are of stainless steel. Large size washers (3x bolt diameter) of the same material, are used under nuts.

Size to be as indicated on plans, otherwise in accordance with the best practice for yacht construction.

Visible fastening holes in the outside surface are to be counter bored and filled with boat plugs of the same wood.
All fastenings involving attaching dissimilar metals to the aluminum hull are to be electrically isolated.

No deck fittings to be held in place by plastic fittings alone.

Glues:
The glues to be used in the construction and lamination of structural wood members are to be of a type approved by Lloyd's register and of a gap filling Resorcinol or Phenolic type.



3 CONSTRUCTION OF HULL AND DECK


For fixed keel versions see drawing number:
428-0-30 MAIN SECTION ALUMINIUM CONSTRUCTION
428-0-31 MAIN SECTION GLASS FIBRE WOOD CORE CONSTRUCTION
428-0-31-1 LAMINATING SYSTEM
428-0-32 MAIN SECTION STEEL CONSTRUCTION

For retractable keel versions see drawing number:
428-0-33 MAIN SECTION ALUMINIUM CONSTRUCTION
428-0-34 MAIN SECTION STEEL CONSTRUCTION
428-0-35 MAIN SECTION GLASS FIBLRE WOOD CORE CONSTRUCTION
428-0-31-1 LAMINATING SYSTEM



4 CONSTRUCTION ITEMS

REQ. HULL DETAILS

1 ENGINE SEATING
1 GENERATOR SEATING
1 MAST SEATING
2 FUELTANK ca. 750 L WITH 2 TANK COVERS EACH
2 WATER TANK ca. 550 L WITH 2 TANK COVERS EACH
2 SUMP TANK ca.175 L WITH 1 TANK COVER EACH
2 HOLDING TANK ca. 160L WITH 1 TANK COVER EACH
1 PROPELLER BOSS
1 PROPELLER STERN TUBE
1 RUBBING STRAKE
1 TRANSOM SCOOP
1 DINGHY STORAGE WITH 2 FLUSH OPENING DOORS
3 LADDER IN LAZARETTE
1 KEEL TRUNK ONLY IN CASE OF HYDRAULIC LIFTING KEEL
7 PORT-HOLE
1 BOW THRUSTER SEATING
1 SHOWER CABIN
1 PILLAR

REQ. DECK DETAILS

1 SLIDING HATCH CONSTR. WITH FLUSH MOUNTED GARAGE
6 COCKPIT SEAT HATCH WITH BLIND HINGES AND GRIP
1 FLUSH DECK HATCH WITH BLIND HINGES
6 HATCH OPENING
2 DORADE SYSTEM IN ARCH S.B. AND P.S.
2 GRATING FOR DORADE SYSTEM
4 WINDOW OPENINGS
4 COCKPIT DRAINPIPE
1 STEMHEAD FITTING WITH 2 ANCHOR ROLLERS (METAL VERSIONS)
32 STANCHION BASES WELDED IN DECK (METAL VERSIONS)
1 RECESS FOR NAVTEC PANEL
1 RECESS FOR ENGINE PANEL
1 BOLTED HATCH IN COCKPIT FLOOR FOR ENGINE REMOVAL
7 CHAINPLATE STAINLESS STEEL OR ANODISED ALUMINIUM
8 PORTHOLE
1 DOGHOUSE WITH RECESSED WINDOWOPENINGS
2 STEERING CONSOLE SPECIAL MADE
6 TUBE UNDER DECK FOR SHEETS, HALLIARDS ETC.
2 DUCKT UNDER DECK FOR SHEETS, HALLIARDS ETC.
2 TUBE THROUGH ARCH FOR ELECTRIC WIRING
2 TOE RAIL ANODISED (ALUMINIUM VERSION)
6 FAIRLEAD ANODISED (ALUMINIUM VERSION)
4 STOWAGE IN COCKPIT COAMING
1 RECESS FOR ANCHOR WINCH
1 MAST COLLAR FOR MAST THROUGH DECK
5 INSERT PLATE (METAL VERSIONS)
2 RECESS FOR JIB TRACK
4 RECESS FOR FOOTBLOCK
2 RECESS FOR WINCH
1 SEATING FOR WINCH
3 STOWAGE IN COCKPIT SEAT


5 FINISH OF HULL AND DECK

The hull and deck will be accurately built according to a well sheering lofting board. The full size transverses with deck radius are delivered by Van de Stadt Design on Mylar film.

Draining:
Limber holes through floor members, bulkheads, stringers, etc. and draining pipes through tanks providing complete draining to bilge pump.

Tanks:
Tanks will be provided with sufficient access openings and all necessary connections as for filling, suction, tank ventilation, cleaning, fuel return, and dipstick or tank level indicator. The tank level indicator will provide a low voltage analog signal proportional to the fluid level in the tank. Each tank has an accessible drain plug at lowest point.

All tanks with all fittings attached must be tested to a pressure of 0,2 bar or to the maximum hydrostatic head to which it may be subjected under normal operating conditions, whichever is the greater.

The sump tank and their fittings will conform to ISO standards.

Anodes: (metal versions)
The hull will be provided with eight boxes for flush mounted anodes, located at the advice of the manufacturer.

Holes:
All frames will be provided with 5 holes of 20 mm diameter, just below deck to fit cabling and wiring. Except for the lightening holes all other holes, needed for completion will be made.

Chainplates for aluminium construction:
The chainplates will be made of aluminium and anodised.
All fastening holes for the rigging will be strengthened with stainless steel bushes.

Chainplates for steel and wood core construction:
The chainplates will be made of stainless steel type AISI 316 or 316L.

Through hull connections:
The hull will be provided with all through hull connections. See 'Plumbing' too.

Surface treatment aluminium construction:
The outside of hull, deck, superstructure, keel and rudder will be rubbed, ready for painting.

Surface treatment steel construction:
Around weldings and surface damage, the hull, deck, superstructure, keel and rudder will be grinded and recoated ready for painting.

Thermal Insulation: (metal versions)
The shell above floor level and the deck should be insulated on the inside with 4 cm Polyethylene foam.

Deck draining:
If necessary deck draining will be with pipes.

6 RUDDER AND BALLAST KEEL

6.1 FIXED KEEL VERSION


Rudder for aluminium construction:
The balanced skeg rudder included the rudder shaft is constructed in aluminium (Rudder shaft alloy of Al Mg Si1 F31). A stainless steel lining is glued on the rudder shaft near the top bearing.

General:
The rudder trunk to be of a tube supported by the center girder and a 10mm top plate.
In the rudder trunk a Jefa bearing will be mounted.
A double lip seal takes care of sealing.
The heel piece with the Jefa lower bearing is bolted to the skeg.
The emergency tiller is made of aluminium.

Rudder for steel and wood core construction:
The balanced skeg rudder is constructed in steel.
The rudder shaft is constructed in stainless steel type AISI 316 or 316L.

General:
The rudder trunk to be of a tube supported by the center girder and a top plate (steel version) or knees (wood core version).
In the rudder trunk a Jefa bearing will be mounted.
A double lip seal takes care of sealing.
The heel piece with the Jefa lower bearing is bolted to the skeg.
The emergency tiller is made of aluminium.


Ballast keel:
The ballast keel will be a fin keel type, constructed as a box keel with an hydrofoil section partly filled with lead ballast. The box keel will be closed at the upper side with a plate and welded off watertight.
In the center part of the box keel a bilge will be made. (metal versions)
The ballast keel will be bolted to the hull with stainless steel bolts. (wood core version)

General keel & rudder:
The horizontal rudder- and keel sections must be made with NACA-hydrofoil sections.
An accurate full size section plot on Mylar film will be supplied by Van de Stadt Design.



















6.2 RETRACTABLE KEEL VERSION


Twin rudder system:
The two rudder shafts are constructed in stainless steel type AISI 316 or 316L.
The rudder blades are shaped in PVC foam (100 kg/m3) and covered with a roving laminate.

General:
The rudder trunk to be of a tube supported by knees. (for metal versions)
In the rudder trunk a Jefa self-aligning bearing will be mounted. (for metal versions)
The lower bearing is direct laminated in. (for wood core version)
A neoprene gaiter takes care of sealing.
The top bearing is a Jefa self-aligning bearing with a lock ring on ball race.

Lifting ballast keel:
The keel will be constructed as a stainless steel box keel with bolted on lead bulb. The box keel is partly filled with lead ballast. The box keel will be closed at the upper side with plates, welded off watertight. The keel will be lifted hydraulically. Special attention will be given to the guiding of the keel to avoid noise, lateral and rocking movement under load.

General keel & rudder:
The horizontal rudder and keel sections must be made with NACA hydrofoil sections. An accurate full size section plot on Mylar film will be supplied by Van de Stadt Design.







6.3 STEERING



General:
Steering will be accomplished by a cardan tube system (Lewmar mamba or similar).


7 INTERIOR

General
The interior shall be in accordance with the interior lay out drawing and interior sections.

All interior joiner work shall be made of teak with some painted panels, as light as consistent with strength and will be arranged, as far as possible, for easy removal to provide access to the structure for inspection.

Care will be taken of the installation of all joiner work to ensure that all parts of the hull are adequately ventilated. The interior joiner work has to be maintenance and service friendly.

Toilets:
All toilets to be finished with Formica.
Floors in toilet and shower with teak gratings.

Bulkheads:
Bulkheads of marine plywood; thickness as per plan (see also 'Construction materials').

Cabin soles:
Cabin soles of 18 mm marine plywood, teak faced with laid in ash strips. The cabin sole should have good supports and enough openings for accessibility of the space below. Cabin soles on rubber strips. Removable sections should be securely lockable.

Liner:
The liner of the hull shall be of solid teak battens, glued to a 5 mm plywood base. The toilets however will have a Formica finish.

Ceiling:
The ceiling shall be of 5 mm Fuma plywood panels covered with "Duraldem" interrupted by longitudinal solid "Duraldem" covered battens. Extra space between ceiling and deckbeams for fly screens and darkening.

Trim:
Trim around openings in berth fronts, locker fronts to be of solid teak trim mitred joints. Rounded openings and all other visible plywood edges of bulkheads, partitions and working surfaces shall be covered with solid and/or laminated teak with as few joints as possible. Openings for hatches and main cabin hatch to be moulded with teak edging.

Doors:
The entering doors to be made of 2 x 5 mm thick marine plywood, teak veneered with 20 mm polyurethane foam core. Thickness of the owners cabin door 40mm. The doors should have ventilation openings at top and bottom.

Shelves and lockers:
To be arranged throughout quarters as shown on plans and as directed by owner and architect whether or not shown on drawings. The front of shelves to be made high enough to secure items on place when opening the door under heeling.

Handholds
Continuously available handholds and grab rails are to be integrated into the interior construction.

Locker doors:
Teak veneered marine plywood, in toilets Formica covered with ventilated louvers as per plan or as directed. Mirror doors in the toilet lockers above all washbasins.

Drawers:
Drawers to be of hardwood with plywood bottom, constructed in such a way that they are locked when closed. Drawer fronts of selected teak.

Leeboards:
Berth and seat leeboard of solid laminated teak

Leeclothes:
Berth leecloth provided with batten and tackles with cleat.

Stairs:
Companionway stairs to be of solid or laminated teak. The stairs should be constructed for easy use under heel. The steps provided with anti slip strips.

Saloon Table:
The saloon table is of marine plywood with a solid trim. The table is connected on a strong, in height adjustable pillar. The table design shall be discussed and agreed with the owner.

Working surface:
Working surface in galley area, including top of hatches shall be of 13 mm “Corian”. The sliding doors above the galley of Lexan.

Hardware:
All hardware of stainless steel or best grade bronze, chromium-plated with satin finish. Hooks and bumpers installed to control throughout the swing of all doors and leaves. Hinges heavy loose pin type for inside doors and solid pin outside. Locker doors with stainless steel or bronze piano hinges. Mortise latches to be used for all cabin doors.

Mattresses and Seats:
Mattresses of 100 mm, except the owners cabin where 150 mm thick polyether foam will be used, covered with the same material as the cushions at owners choice. To realize a better ergonomic seat, the seats should be of shaped polyether, covered with cloth at owners choice. All mattresses, cushions and seat backs shall be delivered by the builder.

Fauteuils:
The two fauteuils near the chart table are covered with leather. They should be fitted with a gas cylinder and should be adjustable in height as well as in circular direction.

Deck joiner work:
The whole main deck shall be covered with teak, glued (with a therefore suitable glue) on a 10 mm plywood base (for metal versions only). The seams have to be filled with black rubber compound. The planks are to be not more than 50 mm wide and are to be laid parallel to the covering boards. The seams of the deckplanks with the king planks will have rounded tips.

Cockpit sole:
The cockpit sole shall be covered with teak planks as specified above in the deck joiner work.

Seat tops:
Seat tops in the cockpit shall be finished with teak planks as specified above in the deck joiner work.

Swimming platform:
Also finished with teak planks as specified above for the cockpit sole.




Cockpit table:
The cockpit table is of marine plywood with a teak solid trim and two folding leafs. The table is connected on a strong in height adjustable pillar.

Ventilation:
All areas of the boat, including the bilges and battery boxes, will be adequately ventilated.



















































8 PLUMBING

The seacocks, to be fitted on all through hull openings on short to the hull welded (metal versions),
Glued and matted-in (wood core version), outside threaded pipes. The inside piping is made of hose, polybutylene or Polypropylene (P.P.).

Special care to be taken in layout of piping and seacocks, valves, etc. to ensure accessibility, to avoid airlocks and unintended siphoning action.

To install piping with accessible drains at lowest points. To be laid out for ease of winter draining.

Install in-take of toilets very close to the centerline to assure ample submergence even when the boat is heeled.

All scuppers to drain naturally and should be laid out so that they can be cleaned by running a wire through. No right angle bends or elbows shall be used.

For each through hull opening a soft wooden plug should be delivered for safety reasons.

The builder should deliver a plumbing plan with coloured code marks with the boat.

The builder will be responsible for supplying and installing the following:

Item Material Dia. (mm)
Fuel filling installation hose 50
Fresh water filling installation hose 50
Waste water suction installation P.P. 32
Tank ventilation pipes hose 15
Toilet outlet hose 32
Toilet inlet hose 20
Gas pipe stainless steel 8
Fresh Water pressure system polybutylene 12
Fuel pipe stainless steel 10
Engine cooling pipes hose
Engine exhaust pipes hose (rubber)
Drain pipes P.V.C. 32
Heater flexible tube Aluminum Flex
Ventilation flexible tube Aluminum Flex -
Galley exhaust Aluminum Flex -


9 MACHINERY

Main engine:
Engine to be Perkins Sabre M130C of 96 kW with a ZF Hurth HSW450A2 hydraulic gear, angled 8 degrees, electric starting with an alternator of 12 volt/70 ampere and an instrument panel. There will also be a hydraulic PTO on the engine. All engine mounted sensors will be electrically isolated from the engine block

Fresh water cooled with heat exchanger and necessary filters mounted above the waterline for easy cleaning. Installed on flexible mountings. Fuel filters and a day tank mounted for ease of operation. The whole installation of the engine shall be under approval of the manufacturer, or representative, of the engine.

Controls:
Engine controls for throttle and reverse gear shall be of single lever type, mounted on one pedestal. The instrument panels and starter/stop controls to be installed on the same side in the cockpit coaming near the helmsman.

Exhaust:
Water jacked exhaust system with special rubber hose, a well sized waterlock and muffler.

Sound insulation:
Inside of engine space to be insulated with Baryfol X2-8 followed with Barynal 40 F30 and protected with perforated aluminium plates (30% perforation 5 x 5 mm). Engine room walls to be stiffened to prevent resonances.

Propeller and shaft:
3 bladed Max Prop, mounted on a stainless steel shaft of 45 mm diameter.

The shaft installation consists of:
- water lubricated rubber bearing, provide with a rope cutter
propeller tube with Hollex seal.

The whole propeller shaft installation is mounted in a hydrodynamic well shaped boss.

The propeller shaft is connected to the engine reduction gear with a flexible rubber coupling, type CENTA AM-50.

Generator:
A Mastervolt Whisper 8000 -3000 / 230 Volt, 50 Hz electric starting generator should be installed, inclusive a special sound shield. Fresh water cooled with heat exchanger and necessary filters mounted above the waterline for easy cleaning. A water jacked exhaust system with special rubber hose, a well sized waterlock and muffler.

Ventilation:
The ventilation in and outlets of the engine space shall be of sufficient area with dorade boxes. The ventilation outlets shall be of the forced type by means of electric Salor ventilators with a min. capacity of 700 m3/h. The vents should be controlled by electric thermo switches.

Drip tray:
An engine drip tray shall be integral with the hull to stop engine oil/fuel running into the main bilge area in case of spillage.





Cooling water piping:
Two separated inlets with sea cocks for main engine and the generator should be installed (See plumbing diagram too).

Bow-thruster:
A Hydromat 12 kW retractable hydraulic bow-thruster will be installed with controls in aft cockpit.

Hydraulic Installation:
An hydraulic pump, coupled to the main engine with an electromagnetic clutch, to power the hydraulic cylinder for the lifting keel and the bow-thruster.



10 ELECTRICAL

General:
The electrical installation contains the following:

a. A 12 Volt D.C. system with batteries to start the main engine and the generator exclusively. The engine starter is electrically isolated from the engine

b. A 24 Volt D.C. system for the lighting, navigation equipment, bilge and other pumps, heating, cooling and electric driven autopilots. Connected to heavy duty batteries.

c. A 12 Volt D.C. system for navigation instruments and small household equipment connected
to a 24Volt D.C. to 12 Volt D.C. converter with stabilised V output.

d. A 220 Volt A.C. system for the battery charger and different household equipment.

Installation diagram:
The yacht is to be fitted according to an approved two wire system diagram, wiring plans, manuals and numbered or coded connections. The hull itself may not be grounded.

All instrument panels, switches, junction boxes, circuit breakers, wiring, etc. should be suitable for a yacht of this size and class. The electrical system will be charged by:

1. A 12 Volt alternator for the starting batteries driven by the main engine.
The alternator is electrically isolated from the engine.
2. A generator
3. An extra 24 Volt alternator
4. Shore power
5. The hereunder mentioned batteries.

Batteries:
For the main engine and the generator 1 battery (deep cycle) of 12 Volt with a capacity of 120 Ah.

For lighting and other users on board 4 heavy duty batteries of 12 Volt / 200 Ah should be connected to 24 Volt / 400 Ah.

All batteries to be properly installed in well ventilated G.R.P. battery boxes in an easy accessible place, The batteries must be secured against movement caused by heeling up to 180 degrees or dynamic load.

All batteries shall be Gel-Cell, Spiral-Cell or similar.

Extra alternator:
On the main engine an extra alternator, type Bosch 24 Volt / 110 Ah to charge the 24 Volt system during the main engine is in use. The alternator is ellectrically isolated from the engine.

The generator will be started automatically in case of:
The voltage drops under 24 Volt.
The thermo relais of the shore power switches off.


It must be possible to switch between hand and automatic operation.

Shore power:
Shore power should be connected to a separation transformer with a selection switch for either 115, 220 or 240 Volt A.C. input to the automatic battery charger. It does not connect to the boat’s 220 Volt AC supply.






Inverter:
A Mastervolt (DC AC) high efficiency inverter of 24 Volt, 100 Ampere will be installed for supplying 220 Volt AC current without running the generator.

Automatic battery charger:
A Mastervolt battery charger with a capacity of 24 volt, 100 Ampere shall be installed.

Switch board:
The illuminated switch board on which the board system is shown graphically will be equipped with at least:
Main switches to disconnect all power to the switch board.
Digital Volt meters to show the system voltage.
Digital Ampere meters to show the charge or discharge of the 24 Volt system.
Ampere meters for generator and shore power.
Volt meters for generator and shore power.
Frequency meter for generator and shore power.
Sufficient amount of switches with illumination lights and thermo-automatic circuit breakers, inclusive nameplates so that each circuit is conservatively loaded.
10 spare automatic circuit breakers.
Gauges for fuel, water and sump.
Volt- and Ampere meters to show the charge or discharge of the starting battery.
Indication lights for: generator

light in engine room
navigation lights
bilge water alarm
Automatic ground fault switch 220 Volt.
Ground fault device 24 Volt.


Each navigation apparatus will be connected separately to a switch board with thermo-automatic circuit breakers.

Wiring & cables:
Cables should be of approved manufacture and grade, sheathed and insulated and suitable for marine application and approved by Lloyd's Register of Shipping. The cables should be of tin coated multistrand copper wire with a fire delaying cover.

Cables must be firmly secured at regular intervals or enclosed in some form of mechanical protection. Wire and cable will have size and ratings to Lloyd's Register requirements.

External Electrical Outlets:
All electrical outlets on the external surfaces of the boat are to be equipped with attached waterproof covers.

Electrical Schematics:
The builder will deliver a plan of the electrical installation with the boat.
11 SPARS AND RIGGING

General:
Mast and boom extrusions to be of an aluminium alloy in accordance with ISO standard AlMgSi 1 with a minimum tensile strength of 280 N/mm².
The mast to be made with masthead-, headstay-, backstay-, shroud-, sheaves- and spreader fittings. The spreaders are of aluminium, aerodynamic shaped.
With a through deck mast, the deck must be connected to the mast by using stainless steel wires, hook-terminals and turnbuckles on both sides. A through deck mast must be filled with foam and made watertight at least till deck level.
The wiring shall be protected by an internally fastened p.v.c. tube or a tube integral with the extrusion.
The color for the coating of mast, spreaders and boom to be considered and agreed with the owner.
Mast:
The mast section should have a minimum moment of enertia as shown on the sailplan, tapered at the top and fitted with jumpers and spreaders.

The mast will be equipped with:
internal halliards, topping lift and lazy jacks
2 Lewmar 54 st winches and stoppers
Frederiksen mainsail track with batten car system series 150
1 spinnaker boom track with slider and end stops
1 fitting for an hydraulic boomvang on deck level
1 track for a trysail
1 mast step
2 signal halliards

1 3-color navigation light and anchor light
1 masthead light
2 spreader lights
red over red
All approved and installed according to the International Regulations for Prevention of Collision at Sea, with DHI-mark

Boom:
The boom will have a minimum equipment of:
1 internal outhaul system.
2 internal slab reefing system
3 integrated sheaves at the boom end and three sheaves with jammers near the gooseneck for outhaul and reefing
2 mainsheet fittings
1 boomvang fitting

Rigging:
All standing rigging type Navtec rod.
V1 rod -48 ; D1,V2-D3 and forestay rod -30
D2 and cutterstay rod -22 ; Permanent backstay rod -17
Jumpers rod -12

Two Navtec-010 hydraulic backstay tensioners and a Navtec-040 hydraulic boomvang.

The forestay and the cutterstay should be equipped with a headsail roller reefing system.
The running backstays and all running rigging to be Dyneema rope.
All sheets of polyester rope.
All blocks Lewmar racing 
12 DECK FITTINGS

All footblocks, winches, tracks, cleats, windlass, padeyes, etc. to be correctly sited and angled to ensure fair leads to all running rigging.

All deck fittings to be laid down on rubber compound bedding, to be fastened with stainless steel through bolts.

Only the use of large sized (3 x bolt diameter) stainless steel washers is permitted. With aluminium construction the connection must be insulated against electrolytic corrosion.

All hatches, windows, doors, locker lids, and any openings in the hull capable of giving entry, must be fitted with locks or similar devices.
All hatches must be equipped with the provision for insect screens.

The builder is responsible for the delivery, the installation and for the proper working of first class parts as per ‘deckplan’.

If there is a “owners delivery “, it must be recorded specially.
The installation of those “owners deliveries “ however should be done under the responsibility of the builder.





































13 PAINTING

General:
The builder should take care about the following

1. To follow the painting and storage specifications, the painting schemes for in and outside work as given by the painting company.

2. All material used should be of the highest quality standard, usable for the purpose and specified by the supplier.

3. If filler is needed to fair the surface, a minimum thickness should be used. Fine and accurate sanding is better.

4. A lot of care should be spend to the fairness of the shell, deck, cabin and cockpit. Visible unevenness should be corrected.

5. Supplier and color scheme of the paint to be considered and agreed with the owner.

Shell, keel, rudder, deck and cabin:
a. The whole inside together with the outside above the waterline of the aluminum hull should be painted according to a first class two component type painting system.

b. The filler used should be of a two component type

c. The superstructure deck shall be finished with a first class anti-slip coating

d. The under water body, keel, keel box, and rudder inclusive should be painted with a minimum of two layers of anti fouling without "heavy metals".

Inside woodwork:
All woodwork should be coated with at least two layers of a two component type polyurethane system, and finished with one layer of one component satin polyurethane.

If there is "coloured" painting agreed, two layers of two component polyurethane, covered with one component coloured paint. The number of layers depends from the needed thickness of paint to cover the whole surface equally. Type of finish to be determined by the owner.

Outside woodwork:
All woodwork, where required, should be furnished with at least 5 layers of two component polyurethane painting system.










14 EQUIPMENT AND OUTFIT

The builder is responsible for the delivery, the installation and correct operation of the first class items as mentioned in the attached specification list. This list is in addition to the items and systems already specified. Some items may be duplicated in the list and in earlier discussions.

An “owner delivery”, will be recorded specially. The installation of those “owners deliveries” however should be done under the responsibility of the builder.


SPECIFICATION - design no. 428 VAN DE STADT 56


REQ. ITEM MATERIAL REMARKS

1 AIR EXHAUST HANDLER
1 ANCHOR SEE RIGGINGLIST
1 ANCHOR BALL
1 ANCHOR BUOY
1 ANCHOR CHAIN SEE RIGGINGLIST
1 ANCHOR CHAIN BOX PLYWOOD POLYESTER COVERED
- AUDIO/VIDEO EQUIPMENT
1 AUTO-PILOT FOR MAMBA
3 BILGEPUMP TYPE 1050
1 BILGEPUMP HAND AMAZON UNIVERSAL
- BLOCKS SEE RIGGINGLIST
1 BOILER STAINLESS ST. 60 LTR.
30 BULKHEAD SOCKET 12 V, 24 V AND 110/220 V
1 CHART TABLE LIGHT
- COMMUNICATION EQUIPMENT
2 COMPASS INCL. LIGHT MAJOR
1 COOKING-RANGE WITH OVEN 4 ELEMENTS ELECTRIC
1 DAYTANK ALUMINIUM FUEL 30 L.
1 DECKWASH PUMP & HOSE 50 LTR/MIN.
1 DEPTH-METER & REPEATER
2 DOUCHE FITTINGS
1 DROGUE (GALE)
1 EMERGENCY TILLER ALUMINIUM SPECIAL MADE
6 FENDER
3 FIRE-EXTINGUISHER BCF 2 KG
1 FLAG-POLE & NATIONAL FLAG
1 FOOT PUMP FRESH WATER MK III
1 FOOT PUMP SEA WATER MK III
1 FREEZER SPECIAL MADE
1 FUEL PUMP 20 LTR/MIN.
1 FUEL PUMP HAND
2 GALLEY SINK & SIPHON STAINLESS ST.
1 GANGWAY
SPECIFICATION - design no. 428 VAN DE STADT 56


REQ. ITEM MATERIAL REMARKS
1 GPS NAVIGATOR
1 HEATER CA. 9 kW/h
1 HORN 24 V
2 JACKLINES
2 LIFE BUOY COMPL. SPEC. REG. O.R.C.
6 LIFE JACKETS
1 LIFERAFT` 8 PERSON
30 LIGHTS & SWITCHES
1 MARINE VHF RADIOTELEPHONE
4 MOORING LINES SEE RIGGINGLIST
NAVIGATION LIGHTS
7 OPENING PORTS IN SHELL ALUMINIUM ATLANTIC SIZE 30
8 OPENING PORTS IN SUPERSTRUCTURE ALUMINIUM STANDARD SIZE 3
1 REFRIGERATOR 130 L
3 SCREEN WIPER 24 V, PARALLEL
- SEA COCK P.V.C
1 SEARCH-LIGHT
1 SHORE POWER INSTALLATION & CABLE 50 M
1 SIGNAL CONE
1 SIGNALPISTOL + EMERGENCY SIGNALS
1 SPEEDOMETER & LOG
1 STEEL-CABLE NIPPER
1 SWIVELLING FAUCET FOR SEA WATER GALLEY
1 SWIMMING LADDER STAINLESS.ST.
4 TANKLEVEL INDICATOR
6 TAP
2 TOILET HAND
1 VENTILATOR BATTERY BOX
3 WASH BASIN & SIPHON
4 WASTE WATER PUMP, ELECTR. 25 LTR/MIN.
4 WASTE WATER PUMP, HAND 60 LTR/MIN.
2 WASTE WATER PUMP, SHOWER 28 LTR/MIN.
1 WATER PRESSURE SYSTEM 9 LTR/MIN.+.TANK 20L
6 WINCH HANDLES
1 WIND UNIT COMPLETE
5 WINDOW IN DOGHOUSE ALUMINIUM HARDENED GLASS 2 WINDOW IN SUPERSTRUCTURE ALUMINIUM STANDARD SIZE 4
2 WINDOW IN SUPERSTRUCTURE ALUMINIUM STANDARD SIZE4R+4L