The Waterline 1320 Study Plans Design Profile Waterline 1320 Design Overview Waterline 1320

SPECIFICATIONS and on the outboard side plus lockers accessed from the under the saloon seats. In the tropics most cruisers LOA 13.20 Metres prefer a BBQ with lid in the cockpit for cooking and baking BOA 7.38 Metres keeping the heat out of the boat.

DRAFT 0.460 Metres Access from the saloon to the hulls is good with the flare DISPLACEMENT 5608 Kilograms allowing better headroom and a smoother transition. The saloon is very comfortable; the extra width of beam allows a B/DECK CLEARANCE 800 Millimetres ‘HOWZAT’ nav. station up top. With navigation being mostly electronic BEAM TO LENGTH 13.5:1 this can also be used as a writing desk, homework area etc.

MAST HEIGHT 17.00 Metres The aft double is a dive in type through a large cut out in the ‘DUNDEE’ bulkhead also with good sitting headroom and heaps of FUEL CAPACITY 100 Litres lockers under the cockpit seat plus a shelf above the foot of WATER CAPACITY 400 Litres the bunk.

HEADROOM 1.90 Metres Ventilation is good in all cabins with a large hatch above SAIL AREA 100 sqm each bunk plus opening ports in the hull giving good cross flow ventilation and light. Bad weather vents can be built PAYLOAD 1500 Kilograms through the forward fairing for rainy days. The head and shower are very spacious with full headroom; the buoyancy MOTORS 2 x 25hp Outboards tank aft is low giving locker and shelf space above. There is also a lot of space inboard over the flare for a hand basin This is a real sailor’s cat with clients asking for a pure, and heaps of lockers set under the cockpit seats for linen light, fast Ocean Cruiser. This request comes from experi- etc. enced sailors on their second or third cat knowing exactly Table size and layout can easily be changed to suit individ- what they’re looking for and they’re unable to find it else- The port mid cabin in useful in extending comfort and ual taste. I’ve set the fridge up in the saloon as a reasonable where. Accommodation is kept to the compact comfortable storage for the forward master cabin; it can be fully private sized box is a bit hard to find on cats. You could use the 4 cabin layout with forward bunks set cross wise for easier from the saloon. The computer shelf can either be up in the head of the double bunk aft for fridge space if this bunk in access by both parties and also keeps the overall accom- saloon or the area under this shelf used for your computer not always in use. The fridge in the saloon is good as ac- modation pod shorter and weight concentration central. or sewing machine etc. or perhaps a vanity, a useful area, cess is easy from the cockpit for drinks. which can be personalized. The galley is comfortable with The forward doubles are comfortable at 1.4m x 2m with the top set to one side over the flare giving good working Alongside the fridge is locker space where one could have sitting headroom above the bunks and comfortable seat area and floor space, the depth limitation only allows a two books or a TV built in. plus lockers and hanging locker in the cabin, the starboard or three burner and grill type stove here plus a single or cabin could have a basin for convenience if required. double sink arrangement. There are plenty of lockers under There is a window above the lockers and a door each side Design Overview Waterline 1320

easy single or short handed with controls run aft. The rig is ‘DUNDEE’ moderate for the boat length but still gives a good power to weight ratio because of her low volume accommodation that keeps the weight down. The long waterline hulls will have a Waterline Beam to Waterline length ratio of approx. 14:1 and coupled to low drag figures she’ll be very easily driven and therefore fast, safe and easily handled

The long overhangs will give good stability off the wind and the beam overall is designed to give good stability to windward, the moderate rig and quick acceleration in- crease these already safe features even further. The twin furlers make her very easy to handle and act as a gearbox giving a very nice open feel between saloon and cockpit to change sails as wind drops or rises. These halyards can plus excellent ventilation and point of view with the radial be clutched on the mast to avoid clutter aft and if a spinna- track and easy access to sheet and traveller controls mak- ker is used instead of the screacher the crew would proba- ing handling safe and precise. The halyards and reefing bly prefer to use the halyard forward on the mast. lines can all be led aft to the central winch station and when coupled with a genny and screacher on roller furlers With a displacement of 5608 kg max. load she will handle allows one to sail very efficiently without leaving the cock- easily with two 4 stroke outboards in our well tested verti- pit at all. The seat back gives a very secure protective feel- cal wells. These are force fed with blowers to eliminate ing when at sea, keeping kids safely confined. The track overheating and fumes. She has all our normal safety ‘AUSSIE OI’ on top of the seat back keeps it away from small fingers features such as multiple buoyancy tanks both high and when . I’d like to see the cabin top run aft for shade. low to make her absolutely safe even if capsized. Approxi- This is essential in the tropics. It also allows the positioning mately 60 individual buoyancy compartments make her of two more solar panels on the roof in addition to the two virtually unsinkable. She has our vertical web on the on the targa bar which is what we need to power a cat of centerline under the cabin sole, this makes a very strong this size when fitted with outboard motors. box beam for beaching or grounding. Water tanks have With the luxury of length she is a “O” ring sealed fittings and reversible breathers and outlet To allow a view of the main sail when sailing or mostly tubes which are above the tank if capsized making sure all lovely sleek sailing cat with high when raising and lowering the main a large sliding hatch water storage is retained in an emergency. tensile engineering and superb which slides forward will open up the roof. This also allows one to stand at the controls with head and shoulders She has kick up rudders and dagger boards which can be safety that will take you anywhere in above the roof when steering in and out of marina’s etc. adjusted or removed to allow side slip in extreme condi- the world in comfort and safety! The double seat can be raised or lowered to see above tions this is an important feature and not only gives good the roof or through the windows forward. Sailing will be windward performance. Internal Layout Waterline 1320 Photos Waterline 1320 Photos (Cont…) Waterline 1320 Photos (Cont…) Waterline 1320 Photos (Cont…) Waterline 1320 Photos (Cont…) Waterline 1320 Photos (Cont…) Waterline 1320 Photos (Cont…) Waterline 1320 Photos (Cont…) Waterline 1320 Photos (Cont…) Waterline 1320 Photos (Cont…) Waterline 1320 Photos (Cont…) Waterline 1320 Photos (Cont…) Waterline 1320 Photos (Cont…) Waterline 1320 Photos (Cont…) Waterline 1320 Material Overview Waterline 1320

Our designs are based on cored composite construction surface as when pushing directly onto the material with the fairing usually uses more bog and again adds weight. Fifth, techniques using epoxy resin and knitted fabrics. But given point of your finger. Balsa is far stronger than Foam (80kg/ because of the inert characteristics, foam requires a much the range of today's composite technologies, which cubic metre) in compression. Foam is stronger than honey- more complex mould for control during construction, this solution works best for and why? comb type cores, both the paper and the plastic. takes more time and is slightly more expensive.

Resin Choices Balsa is also far better than foam or honeycomb in sheer. Western Red Cedar has all the advantages of strip We use West System, Gurit and other good quality epoxy This is when the core sample is held flat between your Durakore, but has a real weight penalty because of its resins for their high strength, adhesive values and higher hands, one hand slid one way and the other slid the higher core weight. (HDT) heat distortion values. It also fully protects the boat opposite way, when the core tears through the middle the against water absorption and it can’t develop the dreaded core has failed in sheer. The amount of stretch you feel Paper Honeycomb Featherlight (50kg/cubic metre) is very Osmosis. Having worked closely with the ATL Composites before the core shears is shear stiffness. To compensate for efficient and lighter than other core choices. This can be team and their products for many years, we recommend sheer weakness the core is made thicker. So 13mm Balsa used for external use but needs extreme care to prevent their materials and service highly. may be equal in sheer to 19mm Foam. water penetration so we don’t recommend this. Ideally it is used for internal furniture. Should water get into the core Cloths Our hull skin thickness is quite thin, we therefore find the you lose 50% of its values. It can be suction dried and We recommend Colan brand Australian made cloths for core works harder and it's stiffness is noticed in the finished restored back to full strength, though this can be a long their excellent quality being easy to work with and having structure (sheer stiffness). Generally a balsa or WRC shell process. Paper Honeycomb has similar strength and sheer low resin absorption but prices can be quite high. Be is noticeably stiffer than a foam boat using equivalent ability in the vein lines and about 80% across the veins aware that cloths vary a lot in the way they are made, laminates. Balsa has very good values and we can produce compared to Foam. some cheaper cloths use more resin to wet out and make a shell using a very light laminate. It will be very stiff and it hard work, and they can be difficult to layout around very resilient to fatigue. Foam Core (60kg/cubic metre) Featherlight Panels We corners and curved areas. This may not seem important recommend this for our interiors. It is light, has no water but when working with a material for an extended period of There are many boats sailing that are built from foam so absorption issues and when backfilling cut-outs doesn’t time, the small things make all the difference. even with its poorer values it works well as a core. Initially absorb as much filler and resin as the Paper Honeycomb one would expect this cat shell to be lighter as it is ½ the Featherlight. The foam Featherlight is slightly more CORES - Which one to use? weight of Balsa. We do have to compensate for its expensive than the paper honeycomb Featherlight. The core choice is usually quite confusing. Cores have weaknesses by adding at least double the reinforcement on different capabilities and properties, and their benefits I the outside to spread that compression load over more core These are the reasons we prefer Durakore feel are utilized fully in our designs. A quick and we need a tri-axial type of cloth weave to compensate and Duflex Panels for our home built look at their abilities: for the veneer content that runs fore and aft on the designs. The price in Australia of balsa Durakore. Secondly, we need to increase the Core Balsa end grain (150 kg/cubic metre) has exceptional thickness to compensate for the shear value, usually panels is less than foam. For a technical qualities including very high compression strength, neutralizing the weight advantage. Thirdly, foam absorbs a engineering comparison and more extremely good sheer capabilities and fantastic sheer lot more resin into the open surface cells than timber and so information on the foam/balsa core choice, stiffness. Compressive strength is the resistance to increases weight. Fourth, foam is an inert type material see a document in “Resources” on our web collapsing when pressure is applied perpendicular to the tending to follow the surface and not naturally stay fair, site or email us. Construction (Various Designs) Waterline 1320 A Note From The Designer Waterline 1320

The success of our designs I feel, stems from the practical in our designs. We work with some of the best Aerospace SAILING ABILITY AND PERFORMANCE common sense approach of a boat builder, coupled with engineers in the composite industries to achieve this. many years of live aboard experience and over 100,000 Power to weight ratios show how well a cat will sail in light nautical miles in some of the worst conditions in the world. Flat Decks The flatter deck lines have a number of conditions. As wind strength increases, one reefs the power This experience makes one aware of the power of the sea advantages. Secure footing while reefing, anchoring and in to stay at safe acceptable speeds (this is different for and the need for a boat to be able to survive these rough conditions. Life lines should be at a sensible different people). conditions, protect her crew physically and psychologically protective height instead of set down a level. A flat deck is as well as being a fast comfortable vehicle for all the good great for socializing, sunbathing or as a kids playground too. The Bruce Number is a commonly used value and very times. I am sure you will find our designs reflect our sailing useful in comparing cats, displacement is not always reli- and live-aboard experience and will give you the offshore Buoyancy Buoyancy distribution is the placement of able and will vary with load. A Bruce Number = 1 is very confidence to sail safely anywhere in the world. buoyancy in the hulls. Our designs have between 50 and 60 slow, 1.3 – 1.4 is a good cruising value, 1.5 – 1.9 reflects a are ‘beautiful, safe, cruising boats’. We hope you find them separate sealed buoyancy tanks built into every shell so very fast cat. Boats like the French 60’ Tri’s and “Club Med” as exciting as we do. they are almost unsinkable. Most old designs hobbyhorse are running to extremes like 2.3. (rock fore and aft), this makes them uncomfortable and inefficient. Modern designs have the buoyancy pushed A light and efficient cat can often sail out of trouble and WHAT MAKES A GOOD ? towards the hull ends damping down the hobby-horsing outrun severe weather patterns, shorten passage times and Choosing a design can be difficult so we hope that this tendencies and giving a lot more safety downwind where avoid bad weather by getting there in the existing weather introduction helps clear the way a little. the buoyant hulls stop nose-diving. Coupled with a lot of window. Most good designs will tack through 90 degrees at reserve buoyancy higher up in the forward hulls this adds an a speed of 8 – 10 knots while reaching at 10 - 13 knots Cat design is not just a matter of two hulls floating a cabin enormous amount of safety and gives you confidence when comfortably with Main and No. 1 in 15 knots of wind. above the water. Only in fairly recent years have the basic sailing off the wind. elements of design and an understanding of their effect on Daggerboards are efficient and allow very shallow draft for the use and performance of the finished boat been A soft ‘V’d entry, quickly picking up reserve buoyancy with beaching. With a strong reinforced bottom and with kick up properly understood. lots of reserve higher up is an ideal combination. rudders, it’s easy to beach our cats. Should you want shal- low keels to protect inboard motors, then a combination of The basic principles of good design should ALL be Good Bridgedeck Clearance High Bridgedeck Clearance shallow keels and fixed rudders are a good option, dagger- present in the boat you’re considering building or buying. is essential. A short cabin length with long hull overhangs is boards would still be fitted as usual. These will blend together to produce an excellent and safe a good safety feature. Good clearance on a cruising cat is multihull. 600mm – 800mm, a Performance cat 700mm – 900mm and Low Drag is a good characteristic. Slim hulls reduce drag a Racing cat 800mm – 1000mm. Chamfer panels add high and are efficient. A good cruising cat would have a Waterline THE BASICS ELEMENTS OF A GOOD DESIGN: reserve buoyancy and need less clearance than a similar beam to length ratio of 11.5 to 12.5:1. A performance cruis- cat without them. They also reduce wave slamming and add ing cat 12.5 to 14:1 and a racing cat 14 to 20:1. Good Engineering Our boats are well proven. With over strength. 400 Schionning cats on the water, and many performing It is important to note that ALL these elements must be under extreme stress whilst racing, we proudly claim we present in a design to make any of them valid. For have never had a structural engineering failure of any sort example, a design can be really good looking, have high bridge-deck clearance, A Note From The Designer Waterline 1320

a powerful rig and and be built reasonably light CAN I AFFORD TO BUILD? and show a fair displacement, but then have an 8:1 Beam One of the first steps in changing your dream into reality is to Length ratio. She’ll be a good looking, powerful boat but figuring out whether you can afford the boat (or more likely, it will be impossible to go forward, except slowly! how much money you ‘don’t’ have!). Two realities here are, firstly, two similar sized boats with similar displacement, built There is no reason why a good modern design does not of similar materials, will cost much the same to build. De- have all of these features. If you find some of these lacking signers’ estimates of materials are often inaccurate and it is usually for the wrong reasons. A lot of cats have very sometimes minimized to lead one to believe their design will little bridge-deck clearance because the designer is con- be cheaper to build. This is definitely not the case, similar centrating on a low profile cat which looks good or being boat, similar price! Your choice should therefore be to- dictated by interior accommodation and ignoring the fact wards the boat that suits you best and is a good investment. that the boat will pound badly at sea. This is not only noisy Secondly, we know a lot of people who could not afford their and uncomfortable but can well be the cause of structural boat at the onset so don’t be discouraged. Once you start problems. Our designs have been developed around these building it is surprising how you focus your interest, spare practical elements of good design and then we time and money into your new project. With our new owner- accommodate personal comforts and lifestyle choices. builders we suggest they start with the smaller items which can be built in the garage, carport, (lounge?) etc. These WHICH DESIGN... initial items use very little material and money but use a lot We have many different design ranges. All incorporate the of time, so at the early stages you can get a lot done while elements of good design discussed above so choosing a you wait for your old boat or car or house etc. to sell. These style, size and layout comes next. Layouts and some items are; dagger-boards and cases, motor pod, forward things like steering position can often easily be changed beam and catwalk, cabin roof, rudders, etc. The ex- so don’t be put off if you really like a particular design but perience and confidence gained building these bits speeds find a few small elements you don’t like, talk to us and we’ll up the second stage of larger items and gets the whole pro- see if we can incorporate your choices. ject finished much sooner.

We’ve taken particular care with the balance of construction methods in our designs, making them light and strong yet easy to build in small sections, most of Good luck with your research and project, don’t hesitate which are manageable by a group of friends when they to contact us should you need further information or a need turning over and moving. The blend of strip planking and light flat panels kept in single plane form, makes chat about our designs. building easy and quick and produces a finished catamaran of classic good looks which will not date quickly, giving you very good investment security. Jeff Schionning Plans and Ordering Waterline 1320

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PLAN DELIVERY: Plans are delivered electronically on a USB drive via mail, or the plan files can be downloaded. The plans consist of A1 and A3 plan sheets and the A4 boat building manual, all in PDF format. Other delivery options can be arranged if required.

Building a boat is definitely a challenge but with good plans, our helpful friendly support and the modern materials avail- able, it's never been easier. The investment of time and money is very worthwhile, offering a rich life experience, fun Advice is readily available to help with your design choice reward when you launch her and financially you can cer- and various options available. tainly stand to gain substantially.

We look forward to hearing from you again and wish COST OF PLANS: you the very best with your project. The Waterline 1320 Plans are AUD$7,700.00. This in- cludes postage anywhere in the world on an electronic USB drive.

UNLIMITED BACK UP SERVICE: Our back-up service is unlimited, our professional boat builder (Jeff Schionning) will be here to guide you through any problems throughout your entire project. Email and phone support is available [email protected] during business hours Monday to Friday. +61 (0)2 4997 9192

HOW TO ORDER PLANS: We require a signed and faxed or mailed PLAN ORDER FORM with every plan or- Unit 1, 38 Wanya Road, der. This form explains the terms and conditions and plans Tea Gardens, NSW will not be mailed until a signed order form is received. 2323 - AUSTRALIA