My powerboat plan

Adrocha, welcome to the forum and I'm sorry that you feel you have been insulted in this thread. Please remember that since you are new to the forum having registered only today, others don't know anything at all about your level of experience, background, or planning process other than the small amount you've posted so far. So some of the replies you get may not be on target or useful. Hopefully the thread can be focused and the majority of replies will be interesting. What is to be avoided on the forum here is calling others names and countering one jab with another and another which quickly makes the thread not enjoyable for anyone. Thanks for your understanding.

 

adrocha, I do not know where or how I could be offensive. I tried to make you see that you were saying contradictory things. I have given an advice that, in my opinion, was necessary, it is always good to think.
Going back to your thread I've never seen a 12 m pleasure boat carrying more fuel weight than passengerl. Evenif I know little about boats, 1000 miles autonomy seems a bit much.
Cheers.

 

TANSL, I felt offended with some terms that you used and the way you used them. But let´s forget that.

I don´t plan to design a boat like Beneteau Antares. I don´t see any fun in having a boat that runs fast but you can't go too fat at his cruising speed. And if you go slowly with them they are uncomfortable.

I want to design a boat that can take me slowly but far with the maximum confort. That's why I want a displacement boat.

I don't think that 1,000 miles is too much. for example from Lisbon to Madeira (one of our islands) is a trip of 500 miles. If you don't want to stop somewhere in Marrocos to refuel you need to have that kind of range.

 

"Mission drift" set in early with this plan ! Is it back to being a dedicated motor boat ?

 

I was wrong because I thought a boat for 4 people, as you were saying, the shapes shown in your first post, for a range of 1000 miles would take more fuel than passage. I was wrong.
Now I see that the boat is 12 meters long and want to go to Madeira and back (by the way, past Canary instead of going to Morocco). Go to Madeira, 6 or 7 knots, it will be a bit boring. If you need more speed and being a 12m boat, 40 hp of which we spoke can be converted into 400 hp. Therefore, the need for fuel will probably be much higher. But this is irrelevant, very minor aspect for a boat with the hull lines of yours. If I knew anything about boats, I'd say you should review the forms.

 

Adrocha: if you don't have time to learn boat design, you won't have time to learn boatbuilding and then build a boat. A used boat will save you a lot of time and money you could spend enjoying yourself in the water. If you do want to put time into this, consider that the design is the most important part. Anything failure or success will be based on the qualities of the design. Lastly, unless you are looking for something out of the ordinary, there are many designs similar to what you are showing to be had for free. Check out the FAO workboats for example.

 

Again, the amount of information you'll need to absorb "to know how to design a boat" is simply well above what a forum like this, is capable of offering. I'd recommend you get a few books on the subject, maybe starting with Geer's "Elements of Boat Strength", followed by "Principles of Yacht Design". Once you get a handle on these, you'll be in a good position to understand the complexities of the various subjects involved.

Adrocha, like yourself many here struggle with translation issues from their native language or English just isn't their strong suit. Don't be offend by the syntax displayed, just read around the adjectives and pickup the messages instead.

Also, we've been involved with many projects over the years, some larger, others smaller and we've seen the usual pitfalls, of the average builder. A quite common wish is to build a dream boat or worse still, to self design, then build their dream yacht, as their first foray into yacht design and building. Plainly put, the odds of success, considering your (assumed and perceived) experience is next to nil. Hell, I have dozens of designs and builds to my credit and the prospect of a new 40' build, is daunting for me. Of course, I'd hire a crew of skilled builders to make the project's time frame reasonable, but this wouldn't be my first picnic either. I've built and overseen projects like this in the past and you can't be prepared, for the project scope of this scale, without some experience. Maybe you would be the very rare exception to this rule, but just playing the odds, it's not likely.

Learning yacht design and building one question at a time, simply will become a career for you, so take a correspondence course, read the usual texts on the various subjects and start developing building skills, assembling tools, arranging for a work space large enough to handle a yacht of this size, preferably close enough to the water, where transport when she's done is reasonable. I'm sure you'll find the drawings you've created now, will become dramatically different once you've gained some understanding, though no doubt you'll still have many questions. It's at this point where you'll find a discussion forum, such as this is most helpful, as some of us will have had these same questions previously and will be happy to pass along what we learned.

 

Thanks for all of you that spent some time with my questions.

I will do my homework. Sooner or later I will be back with some questions. Hopefully more interesting questions.

 

The start is getting aboard as many boats as you can for a short cruise.

There is no way to understand the choices , with out seeing the many ways cruising can be done.

You want the boat to be from your ideas , boats today are the result of 5000 years of trial and error , experimenting and experience.

The folks who say , go buy a boat and get cruising , are not putting down your self design concept, they have the experience to know what does work.

A used boat will usually be 1/2 to 1/10 the cost of a new build.

Experiment , aboard with systems , to make your boat better for you, cheaper if you fail.

 

Time is short, and its probably best not to take offense at someone who is direct with you, but rather analyse what is being said. I hope my comments are taken in this spirit too.

I strongly suggest you dont dismiss Tansl's comments because of his direct manner. In some cases not having english as a first language can come across a bit terse, but tansl is an expert at boat design, with a lot of practical experience, and Par is a wealth of information and advice.

All of what they have said so far can be regarded as gospel.

The fact that you don't comprehend much of what they have said is the main problem. Until you have been caught up in full design project, you wont understand the complexity of the process.

I will add my observation about your design - it has very little merit.

Your comment "I think we could have a good thread showing the process of design a boat." shows you haven't done a lot of searching.

Start with
http://www.boatdesign.net/forums/boat-design/generic-advice-new-boat-designs-designers-51424.html

then look up every thread in Boat Design with the word 'NEW' in the title.

That will start you on the road to enlightenment.

 

Maybe I overreacted. I don't question the knowledge of the members of this forum. That´s why I'm here. This forum has members with knowledge and experience that can help me.

Believe me when I say that I am grateful to ALL of you that spend some of your time posting your comments and giving your honest opinion.

I have been reading some books and making some research. I am following "Principles of Yacht design" and some disperse texts on the dynamic of a motor boat hull.

Soon I will post more about my findings.

 

>This forum has members with knowledge and experience that can help me.<

Yes but they can only help when you know what you need , to get to that goal.

MY WAY is not specific.

 

I am opening a new post (My powerboat plan Take II).
It will be a different boat and it might be confusing if I continue this one.