And this right here is why boat builders should stick to assembling boats & not designing them! Leave all this to a naval architect! The sheets are all supplied computer CNC lofted & plasma cut, but with 3/4 inch tabs still nesting them into the original rectangular sheet. All allowances are factored in for the myriad of things you have no idea about when it comes to designing a boat. You have no idea what the longitudinal Center of gravity or Center of buoyancy will be, once constructed with the engine/s, fuel tanks, passenger loading etc etc. Same from side to side, you have no idea what those parameters will be side to side either, or indeed what the meta centric height will be. Will it self right to flooding angle? Will it pass a standard incline stability test when fully loaded with all its rated passenger load standing on one side at the same time? It’s supposed to retain more than 1/8th of its beam width in clear freeboard under that condition, to pass the test once built. You have no clue how to calculate that at the design stage. Will it ride on its chines or are you designing / building a chinewalker, that always rides below its chine seam and falls to starboard or port? I can see just from this one video, you really have zero idea what your doing. I am all for learning by your mistakes but a 25 ft boat is a damned expensive way to turn a LOT of $ into scrap metal when the finished product ends up scrap metal coz it handles like a pig. Naval Architects are worth their weight in Gold! They are worth every penny that they cost because you know ahead of time all these important design and handling / safety aspects, of vessel design. All I can say is this will end in tears! I can say this from experience & qualification having built aluminium boat designed by a naval architect & put it through passenger carrying commercial survey, as well as owning now a 25 ft aluminium boat designed by a naval architect in commercial passenger survey, as well as the fact I’m a qualified master 5 skipper, (100 tonne ships master). Son your problem here is that you mistakenly THINK you know what your doing, but the fact is you know barely enough to be dangerous, because you don’t realise how much you DONT know, that can easily get yourself and crew / innocent passengers killed. Naval architects have forgotten more than you will ever know about designing or building a boat, and to not avail yourself of that knowledge experience skill etc is just fool hardy at best, and out right dangerous / potentially deadly at worst. Go sit down with a local naval architect & give him your design brief, tell him what you want out of the boat etc & let a professional design something up for you! You can review it all on screen in 3D with all the performance & safety parameters known ahead of time. You will save weeks of time having the sheets lofted & CNC plasma cut to within 1/10,000th of a millimeter, for a perfect fit! You will know ahead of time what WOT speed it will deliver with given HP engines, what fuel tank capacity it will hold and what fuel range it will have. You will know how stable it is, what load it can safely carry, what the metacentric height is and how long the GZ curve is. These aren’t things you just “wing it” on! In the same way you shouldn’t design & build your own plane or helicopter, you shouldn’t be doing the same with a 25 foot boat. 25 foot boats don’t go to sea with just you on it! It takes a minimum 2 crew for a 25 ft boat, which means every time you go out someone else’s life will be in your hands, for the design, construction, materials selection & then operation / handling of the vessel. I know people been designing & building their own rafts canoes and yes even boats since NOAH built the ARK, but even NOAH had a set of plans from the creator of this universe, the grand architect of all creation. Do yourself a favour & at least sit down with a naval architect and discuss what your intending to do, and see what a professional says! Best of luck with it, I have a feeling your going to be needing it! Cheers
Charlie Guess again! 100 tonne ships master who has built aluminium boats designed by naval architects before today. I happen to know, what it is that this guy doesn’t when he ought to know.
Mightiflier Nah I don’t design boats, I’ve built one or two, but no Naval Architect! Have hung around & fished a bit with a Naval Architect, & as a 100 tonne master you do study vessel design, construction, stability, etc etc. Just enabled me to see the cluster phuk job this idiot is doing making it up in his head as he goes along! I realised there’s no point trying to help him- he’s to young & arrogant to listen. There are some people in life you can’t help, it’s as well to just walk away from people like this. They are too stupid to know, what it is that they don’t know is the thing most likely to get themselves killed!’ I look at it as Darwin hard at work, draining the shallow end of the gene pool! 😂😜👍🇦🇺
Ian-Pretty sure this guy knows a lot more than you think he does since he embraced your comment. We'll see when he is done. Maybe you are right, but your hostility reveals that, maybe you have some personal issues from your childhood you need to deal with. How was your relationship with your dad, was he a perfectionist? Did you feel accepted as your father's beloved son, or did he make you feel like you had only conditional love? Did your mom show you love and acceptance? What was the interpersonal relationship between your mom and dad, whoa, there could be some issues. These are issues you need to look into with a licensed professional counselor because your response reveals much about some brokenness that you need to deal with.
@2:50 you mention there is no set formula. Funny story but that's exactly how Formula boats got their name. Don Aronow (Donzi) and his business partner talking boat hull design and his son said something about there being a 'formula' to building a race boat hull.. And the rest is history. Cool build and thanks for sharing.
If you wouldnt mind sharing, where or how did you learn to do this? specificity the layout and design? Did you design this boat and lay it out / loft it yourself or did you have plans? I ask because building my own aluminum boat is also one of my life long dreams but I have no experience laying out a boat. I also want to be able layout and cut my own materials, so I am not looking to just build a kit. If you wouldnt mind sharing how you started your learning process, I would greatly appreciate it.
Years ago a professional Canadian boat designer builder told me how he did it. He built a scale model of the boat first. He then took the shapes from the model hull and scaled them up. Transferred these to the alloy sheets and cut them out. He would then assemble the hull using 1/2 inch tacks. Then add the ribs. Outside hull stiffness longitudinal were quickly added to reduce distortion He told me it would come out exactly as the model looked so there were no surprises. Unfortunately I have not put it all to the test yet. Hope this can be of some use.
How are you figuring to anticipate heat warpage as you weld? Kind of hard to accurately know to the nth degree what will happen on long welds even to a lesser degree on stitch welding. Also have to remember the saw kerf when using off cuts for a pattern. Nice project. Take care. Doug
Douglas Thompson You don’t continuous long weld aluminium boats. You stitch weld 2 inches at a time & alternate stitches port starboard port etc to allow time to cool between the next stitch. You weld from 2 inches away from yourself back 2 inches towards yourself. Then same on opposite side, then when you come back to the first side you jump ahead 4 inches of where you left off, and weld back 2 inches towards yourself, leaving a 2 inch gap between the two welds. When it’s stitch welded you clean up with stainless steel rotary brush & fill in the 2 inch gaps using the same method. You do this on the inside seam & outside seam. Aluminium being a white metal doesn’t show when it gets white hot and approaches melting point. That’s the reason you start well ahead of your last weld and draw weld back towards yourself, it allows the start of the weld time to cool before the next 2 inch stitch commences. By alternating side to side you minimise / prevent warping, and this with the draw stitch 4/2 method heat doesn’t get a chance to build up. Welding aluminium boat is a science / skill in itself. Up fillet welding a transom takes extreme skill.
Buddy thank you so much this is awsome i want to build a boat also this will help out a bunch . thank you again and keep up awsome work . have a great day
Super informative, great video. 126 Likes and no trolls appearing on the Dislike. You must be doing something right. But Oh Man, you left us hangin' to see what your hull profile would be like.
Friendly tip..... get a book on "marine and aircraft "LOFTING". They had great ones from around WW2 ,don't panic its easier than you think..I believe you can weld . "When in doubt lay it out ", then fab that's cutting the material, then you can build whatever you are building. Lofting is layout full size. I would kill for the space you have. Check out the old books Amazon probably has a few . I admire your passion, keep on. Years ago the Aluminum industry assoc had info about welding boats Like COPPER DEVELOPMENT has for copper, brass etc . Most of it is free. We want to see progress ,
My friend. What’s your name. This is great. I have watcha more than a dozen of your videos. It’s great that you put off the cutting for s day. Hahaha. Totally smart. This is great stuff.
Awwwww, Has Ian come back with crow feet sticking out of his pie hole? LOL.... I get the impression after his diatribe below, he walked down to the local pub with his chest puffed out, thinking, "I sure did show him..."
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Great series , really enjoying the build.. I am a little disappointed with the Patreon site. If you've switched to Instagram , Cool.. Just let us know ... i'm beginning to feel like I was scamed on that...
why not cut two points on it and fold them together works more accurate and faster buy a lot and put in support beams temp to keep it true on the line then not much that could go wrong
