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About Our Stock Boat Designs
Copyright 2011 Michael Kasten
Updated January 2011The following paragraphs are intended to:
- Explain how a stock design is created;
- Show how the cost of a stock design is determined;
- Briefly outline what we offer along with the purchase of a stock boat design.
How Are Our Stock Designs Created...?
Each of our stock boat designs was originally developed as a new custom yacht design to suit a specific set of requirements, resulting in a unique design solution for a specific client. Our custom yacht designs are then subsequently offered as stock boat building plans.
Among the yacht designs on these web pages you may discover a stock boat design that will suit your requirements as-is, or that may be suitable with a few simple modifications. That is precisely why we have offered these designs: they offer a chance to obtain a complete pre-existing vessel design at a very favorable cost.
For the best introduction to our stock boat plans, please review our "Sail Boats" and "Power Boats" pages. Most of the designs you'll find there are available as stock building plans. Complete information about ordering our plans can be found on our Plans List page.
If a Stock Design only partially suits your requirements, we can make whatever adaptations are needed. If substantial revisions are being considered, it may turn out that a new Custom Design will be just as easily accomplished. After all, the cost of creating a new Custom Design is not at all a large percentage of the cost of a new vessel.
In fact, it may come as a surprise that the cost to develop a new Custom Yacht Design is ordinarily a fair bit less than the price of a yacht broker's fee charged for the simple formality of signing papers in order to purchase a new or pre-existing yacht. In the case of a new vessel built to our stock or custom building plans there is no broker commission involved, nor is there a commission of any kind whatever.
In terms of the true cost of ownership, it is of considerable importance whether the vessel that gets built will suit the owner's needs, both now and in the future. If it does not, then the vessel's cost may turn out to be very high indeed.
During the development of any new design it is our goal to be sure that the resulting vessel meets the owner's requirements to the best possible degree. If the possibility of creating a new design might be of interest please see our web page on "Custom Design" for more information.
Please also have a peek at our Prototype Sail Boat designs or our Prototype Motor Yacht designs, among which there may be good inspiration for creating a new design. If one of our prototypes turns out to be suitable as-is, we can easily develop it into a completed yacht design. Or we can start from a "blank sheet" to create a new and unique design to your specifications.
Plans Ordering Options
Our Stock Designs are offered in four basic increments, as follows:
- Inquiry Package: Includes the first few sheets of the actual Building Plans. Ordinarily the Inquiry Packet includes the Sail Plan or Exterior Profile Drawing and the Interior Profile and Arrangement Drawing, plus the Vessel Specification and Equipment List. Enough information is present for an owner to assess the design, and begin the preliminary Estimating Process.
- Estimating Plans: These consist of the Inquiry Packet, plus the Structural Profile & Arrangement Drawing, and our revisions to the Vessel Specification and the Equipment List to suit your equipment preferences. For a much more complete look at any of our designs, in particular if you wish to submit the design to a selection of builders for a construction quote, the Estimating Plans set will provide the requisite information to the builder for an accurate construction estimate.
- Building Plans: All the design drawings and documents necessary for construction of the yacht. For actual construction, the Building Plans will be required.
- NC Cutting Files: For a number of our Stock Metal Boat Designs, we have developed computer defined cutting files, to allow automated pre-cutting of the metal structure. "NC" just means 'numerically controlled' cutting. NC Cutting Files allow a "boat kit" to be pre-cut by a computer driven plasma torch, or water jet, or router. NC Cutting Files are entirely optional, however they are an enormous aid to construction both for first time builders as well as professional builders. NC cutting provides vastly greater accuracy in the fit-up of parts and has the potential to save the builder quite a lot of labor during fabrication. These translate into a higher quality end product as well as an overall savings to the owner.
Our Stock Plans prices are related to vessel size and to the quantity of detail originally developed for the design in question. You will find a complete price list of our available boat plans and NC Cutting Files, including plans ordering information on our Plans List Page.
What Are Estimating Plans...?
In order to be able to determine a 'completed vessel' cost or even a 'power-away' build cost, there must necessarily be a well defined plan. In other words, the owner must present sufficient information to the builder so that the builder can actually sharpen their pencil and provide a firm quote for construction.
At the very least the builder should be provided with what we call an "Estimating Plans" package. This consists of the first few drawings of the actual "Building Plans" plus a few preliminary design documents, as follows:
Drawings:
- Exterior Profile / Sail Plan
- Interior Profile and Arrangement
- Structural Profile and Arrangement
Documents:
- Vessel Specification
- Structural Scantlings List
- Surface Areas
- Structural Weights
- Equipment List
- Designer Cover Letter to Owner
- Designer Cover Letter to Builder
- Template Owner Cover Letter to Builder
The Equipment List includes all the various mechanical and electrical equipment items. The Vessel Specification outlines the intent of the design, gives the vessel's proposed scantlings, construction materials for the hull and the interior joinery, the proposed paint schedule, and a preliminary indication of power, range, tankage, performance and stability.
With the Estimating Plans, Vessel Specification and Equipment List in hand, one can then approach builders to inquire about actual construction costs.
Finding a Builder...
We are always able to make builder recommendations, and we are pleased to do so. However we do not provide builder lists or any builder contact information until Estimating Plans have been purchased, or in the case of a new design, until the Estimating Plans have been created.
Why...?
Builders will have very little to offer in way of pricing until they are presented with adequate information in the form of Estimating Plans as described above. Only with these drawings and documents will they be able to create an accurate construction estimate.
- If a builder is not presented with a completed concept, they may simply present an alternative design or possibly a boat they have in production, which may be quite different from the design the owner had envisioned.
- Without complete plans and documents a builder's only other option is to provide an incomplete estimate - one that is likely to be substantially different when it comes time to build the boat.
- Our builder recommendations are based on a number of considerations:
- The prospective boat owner's requirements
- The type of vessel being considered
- Hull structure material
- Vessel size
- The anticipated level of completion
- The degree of finish that is expected; etc.
In other words, a builder can't provide a meaningful quote without the right information. Without sufficient information, the builder will be in the unfortunate position of attempting to apply a fudge factor to a variable that's been based on an assumption about an unknown. Thus they can only end up with... an unknown!
Further, our builder recommendations will be made on the basis of their suitability to the project being considered. Why is this 'suitability' consideration important...?
- Some builders prefer to only build the hull / deck / cabin structures, while others prefer to build the whole boat.
- Some can build only up to a certain size of boat.
- Some do not want to fool with power boats, nor others with sail boats.
- Some will be better suited to providing the owner's specified level of finish, and so forth.
Essentially, for every design there will be several qualified builders, and there will be others that are neither suited to the project nor possibly even interested, on which it is not worth wasting everyone's time.
So yes we are pleased to make builder recommendations whenever possible, however we will do so only when we have also supplied the prospective boat owner with sufficient information for those builders to determine construction costs in the form of actual Estimating Plans.
In this way an owner will not be wasting their own time. Just as importantly, they will not be wasting the builders time...!
What's Included With Building Plans...?
A stock Building Plans Set will usually consist of the following drawings and documents. Smaller vessels may be less detailed; larger vessels will be more detailed. Some of the categories listed below may consist of several drawings...
- Outboard Profile / Sail Plan
- Inboard Profile & Arrangement
- Deck Plan
- Structural Profile and Arrangement
- Structural / Joinery Sections
- Structural Details
- Lines Drawing
- Rudder Foil Details
- Keel Foil Details (if applicable)
- Spar and Rigging Details as needed
- Machinery Space Details as needed
- Joinery Details
- Misc. Construction Details
- Table of Offsets (Unless NC Cut)
- Vessel Specification
- Paint / Maintenance Specification
- Equipment List
- Weight Budget
- Report of Hydrostatics and Stability
- Report of Performance and Range Under Power
- Owner Cover Letter to Builder (Template)
- Designer Cover Letter to Builder
- Designer Cover Letter to Owner
Larger vessels may have multiple sheets for any of the above, while smaller vessels may have many details combined into single sheets. In some cases, a design may have been more thoroughly detailed at the request of the original client, in which case there will be more detail - ordinarily reflected in the cost of the stock plans set. To review an outline of the usual design calculations available with our stock and custom designs please see our article on Essential Design Data.
Optional Services
In all cases, we can provide additional services on request, possibly including one or more of the following:
- NC Cutting Files
- Design Revisions to Suit
- Performance Testing or Analysis ( Sailing Polar Diagram; Tank Testing)
- System Schematics
- System Layout Drawings
- Inspections During Construction
- Drawings and Analyses for Class or for Commercial Registry
- Documentation for CE Marking Within the EU
If the original client has taken advantage of computerized pre-cutting for any given design, then those NC Cutting files are made available for subsequent re-use by others. If NC cutting files have not yet been developed for any particular stock design, they can easily be created.
Our detailed NC cut files include all internal structure and plating for the hull, deck, and cabins. Internal structure includes frames with cutouts for longitudinals, stem / keelson, engine beds, tank faces and lids, bulkheads, rudder components, keel foil components. All plating is defined, complete with marking lines for alignment and for cut out of the various openings.
Please see our web pages on NC Cutting to review the process of creating NC Cutting Files, and to find out about the potential savings that NC cut parts make possible during construction.
Changes to a Stock Design
Before considering changes to any stock design, it is best to consult with the original designer of the boat. Small changes to interior accommodations or 'style' from one owner to the next are to be expected, and are not usually any cause for re-design, re-evaluation or new drawings.
On the other hand, larger changes that involve the locations of tanks; engine; bulkheads or other structure, masts; sail area; engine power; or changes to any of the vessel's scantlings; hull shape; decks; or superstructures will require the expertise and approval of the designer of the vessel.
Why is this...?
Any of these latter changes can, and probably will, have an affect on one or more of the vessel's stability; the integrity of its structure; its safety; or its performance, therefore they must necessarily involve the designer of the vessel in order that all those elements be properly integrated into a final design.
The cost of requested changes to any of our designs is estimated in advance, and then charged for on an hourly basis. If one of our designs is appealing for your requirements, but needs a little something... we'll be pleased to provide our usual written Design Proposal for that work.
A "Semi-Stock" Design...?
Once in a while I am asked to provide a set of drawings for as little cost as possible, even to the point of requesting that I work out only a "faired set of lines."
While that concept may at first seem appealing, it is not at all a good path to follow. In order for any vessel to be considered safe and suitable for construction, there are many other facets of the design that must be considered and integrated into the final result. In other words, the design process cannot be broken down into separate parts that can each stand alone. The design process as an integrated whole is very much a requirement.
For example, in order to assure adequate structure, stability, performance, seaworthiness and comfort, our goals with each design are to assure:
- Suitability to the owner's requirements and to the intended service.
- An interior and on-deck layout per the owner's requirements.
- A pleasing aesthetic, longevity and ease of maintenance.
- Sensibility of structure for the sake of ease of construction.
- A functional layout for machinery and equipment.
- A distribution of weights that will provide correct trim and adequate stability.
- Performance suited to the vessel type.
- Structure according to the ABS, Lloyds, or GL scantling rules as is appropriate to the vessel's structure or build venue.
- For motor or sailing vessels under 24 meters measurement length, stability per the EU Recreational Craft Directive criteria for ocean service (ISO-12217).
- For motor or sailing vessels over 24 meters measurement length, stability per the IMO or MCA criteria for ocean service.
From the above we can begin to see that when properly done, a completed yacht design involves no small amount work...! With luck, it will also be apparent that we cannot possibly extract or isolate one or more of the above ingredients and still hope to have a successful result.
A Custom Design...?
In many cases, a new Custom Design will be the most appropriate path to a new boat. While certainly there is cost involved in order to develop a new yacht design, we must consider the much greater cost that would be incurred if one were to build a half baked design that fails to meet one or more of the above criteria... It is for this reason that our design process has been developed in order to allow the greatest degree of flexibility so that success with the vessel that gets built will be assured.
The cost to create a new design is ordinarily quite predictable. Prior to beginning any new design, we will provide a thorough estimate in the form of a written Design Proposal. If our proposal is acceptable, the design work can begin.
The place to start the design process is to first create an owner's "mission statement." This can be as simple as a paragraph description of the intended vessel, or possibly just a list of the features regarded as being important such as preferences for rig, power, equipment, materials of construction, overall size, accommodations, budget, project timing, and so forth.
This 'mission statement' becomes our preliminary "Owner's Specification." This document need not be 'formal' in any way. It can be sent by fax, email or by letter. While owner provided sketches or design examples are not at all necessary, if you've developed preliminary sketches or have come across inspiring examples in your search for 'the right boat' then certainly they can also be included.
After I've reviewed your 'Owner's Spec' and have understood your requirements, I will provide our usual written "Design Proposal" by return email or by letter or fax. Our Design Proposal is offered free of charge, and implies no obligation whatever - it is just good information for your planning purposes.
When you've reviewed our Design Proposal, if it seems as though a new yacht design may be the best option, then the process can begin. If you'd like to review an outline of the Custom Design process in greater detail, please review our web page on Custom Yacht Design. If you would like still more information, please feel free to contact me at your convenience. You may be surprised to discover that creating a new yacht design costs less than you think. It is by far the most rewarding path to long term boat ownership, and the process itself can be quite a lot of fun.
For information on the cost of developing a new custom yacht design, please see our web article on Design Costs. For information on the potential cost of new construction, please see our web article on Boat Building Costs.
Ordering an Inquiry Packet, Estimating Plans, Building Plans and NC Cutting Files
As noted above, our Stock Designs are offered in five stages, as follows:
- Inquiry Package: These include first few sheets of the actual Building Plans and include the Sail Plan or Exterior Profile Drawing and the Interior Profile and Arrangement Drawing, plus the Vessel Specification and Equipment list.
- Estimating Plans: These consist of everything included with an Inquiry Packet, plus the Structural Profile & Arrangement Drawings, our revisions to the Vessel Specification and Equipment List to suit your preferences, our recommended builder list, and letters of introduction to the builders.
- Building Plans: Includes all the design drawings and documents necessary for construction of the yacht.
- NC Cutting Files: A number of our Stock Designs in metal have been developed for computer cutting of the metal structure by using a computer driven plasma torch or water jet. If NC files have not yet been developed for a given design, they can be created on request. In the case of plywood, a computer driven router can be used to pre-cut all the structural parts....
To order one or more of the above for any of our designs, please see our Plans List Page. New Stock Designs are being added at the rate of around two or three vessels per year, so if the current sampling does not provide just the right combination, please check in again! Or if you'd like to know more about creating a Custom Design to suit your specific requirements, you'll find a thorough description on our Custom Design Page.
In any case, please feel free to inquire for more information on any of these options...!
Professional Memberships
Please see our AVAILABLE BOAT PLANS web page.
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