Відео

Vielen Dank für deinen Kommentar. Wir freuen uns, dass dir unser Projekt gefällt. Deine Frage ist natürlich sehr berechtigt. Ein so komplexes Projekt, das vom Entwurf über alle Kalkulationen, die Technologiebestimmung und das Wissen über Hi-Tech-Baumaterialien reicht, kann man nicht ohne Erfahrung umsetzen. Trotzdem haben wir uns in vielen Aspekten auf „Neuland“ begeben, da unser Projekt untypisch ist und es in vielen Bereichen wenig oder gar keine Informationen zur Verfügung stehen. Kevin und ich sind beide Diplom-Ingenieure, und das Wissen, das wir haben, hat uns geholfen, das Projekt zu starten, Probleme zu lösen und den Bau zu realisieren. Außerdem ist (auch) mein Hobby das Entwerfen und Bauen von Booten. Ich habe einige kleinere Boote gebaut und restauriert. Kurzzeitig habe ich auch für ein Bootsbau-Konstruktionsbüro gearbeitet.

Schön, dass es dir unser Katamaran gefällt. Danke! Wir sind gerade dabei die Innenausstattung zu bauen und installieren (Sitze, Schränke, etc.). Es ist viel Kleinarbeiten. Zu deiner Frage wovon wir die Hauptmaterialien bekommen: meistens von R&G, HP-Textiles, Maricell.

Danke! Materialstärken welche wir verwenden kann man nicht so einfach für anderes Boot übernehmen. Es ist ziemlich komplexe Aufgabe, welche von vielen Faktoren abhängig ist. Bitte um Kontakt auf: bo_janu(at)yahoo.com.

... in my computer she is fast, very fast 🙂.... , but unfortunately she is not ready for sailing yet 🤷

Nice you like it. Some info is in the description under the video. In this stage, on this video the weight was 2,6 t.

Thanks! Nice you like it.

First, thanks for the comment. For the structural calculation I used SolidEdge which has well working FEA module. Without the correct calculation I would not advise to design such complex structures as multihulls. If you do not have experience in this matter I would advise that you design the general shape you like, and look for advise of known yacht designer, which has experience in multis, because it is not only the structural calculation and choosing of the correct material and its quantity , but also it's about of many air- and hydro-dynamic aspects around. Wish you success in realisation of your dreams. 👍

;-) ... yes, we betrachten this lunch as the technical lunch. The real reason is, we need to go in water, because we have the possibility to get the place in the big shipyard hall only from July to October. In winter all places there are rented for boats which had already longtime contracts for winter storage.

Thank you for the comment. You are correct because most of the videos on UA-cam, which describe, for example, the building of a boat, are intended not only to showcase the construction of the boat itself but also the life of the builders. This is to make them quasi-influencers with the hope of earning money from clicks and advertising. The purpose we present in our building story is included in the description under the videos - please read. We aim to possibly provide short and informative content, focusing only on the main technical aspects of our project without delving into details which are commonly known and without details about ourselves and our lives,. During the build, and when capturing video material, we often have music in the background. This, unfortunately along with our voices, must be deleted. Otherwise, UA-cam doesn’t allow us to publish the video because the background music isn’t authorized. That's why I only comment on the videos and use another music background which is authorized. I also believe that pictures and videos convey more than the best comments.

@@bojanu7212 ok heare me out this is a whole yacht we are talking about so for months you will be doing repetitive work, i understand this, and this is the partu deed good you show us exactly the amount of details that is desirable without it getting booring, and you dont talk much in the videos you do voice over all of this is good So what i am saying instead of saying " urr just some more sanding" you coulxd make it interesting and just give some more details eg " so we are now sending the roof, and swe always have to wear our protective gear like i said before you dont want to breath this dust, my dad had been sending here for like 5 hrs straight, got lunch and he is back at it" I mean i dont knw if you understand what i am saying, im also an engineer and our brain is always telling us this is not important and in the end we are just left blank

Dzięki! Naturalnie Wielkie Wodowanie będzie ogłoszone. 🙂

Super! How do the Pods perform?

@@bojanu7212 they work very well but haven't got regen to work with my non-eProp propulsion bank. I wouldn't go another way though!

More details, I didn't want to use the ePropulsion batteries because they (1) shut off automatically (2) are pretty heavy in terms of kWh/kg (3) don't support CAN to interact with my Victron GX setup and (4) didn't fit well in the space I had available. So I made a custom battery pack with CATL cells (280Ah) and an ORION BMS. I've been slowly reverse-engineering the code to make the ePropulsion motor controller turn on the regen, but I've stopped working on this recently because my solar production has been more than enough for my needs so far. I might go back to it later, or I might replace the ePropulsion controller with another motor controller that is more "open" to configuration. Or I might put a small ePropulsion battery "in the loop" just to turn on the regen. We'll see! I wish there was more options on the market! But electric propulsion, especially with retractable outboards/pods, is so amazing. I just love it. In addition, when the sun is shining and the battery are full, you start to use your engines in a different manner. There's literally no reason not to run an engine and go a bit faster when the sun is overflowing you batteries. So I end up motor-sailing even though I would otherwise be a sailing purist on a dino-juice boat.

@@AntoineGrondin Thank you for the info. I didn't buy the batteries yet. So, I have to consider that what you said. Sure we will have the solar panels too, but on my rough estimation it will not cover our needs. Still I wasn't busy enough with this theme, because I do have still a lot of other issues to solve.

@@bojanu7212 how much solar are you planning? I went above and beyond and shoved 2,280W overall on the coachroof top and over the arch, and we have a 10m catamaran. You should be able to put more, depending if you prioritize it or not. Mine is all over the dinghy, keeping it shaded and staying in the shades. But it's ~25kg per panel, not so light. Custom panels can be made that are lighter but I haven't gotten there yet, I just wanted a functional prototype with as much surface area used for solar as possible. I'm considering adding a lightweight diesel genset, like the Hatz 1B50 fiPMG, but this would require some creative designing for the air-flow to account for cooling and exhaust. But it's an incredibly lightweight direct-DC 48V generator that's compatible with Victron. Note that there's an exponential curve to power vs. speed. The curve looks best (to me) around 2-3kW of power, to motor at 4-4.5kts. This is a good mix for me of speed and power. I can do 3kts at 800W. Going fast, for long, with my engines isn't something I'm counting on. Sails are for that, otherwise we just need something to move a bit at a steady pace.

Yes. See the description under the video.

@@bojanu7212 how can weight and displacement be different?

@deerfootnz To explain simple - displacement is (in ship building) understand as the volume of the water (or their weight) pushed out by the ship, and calculated to the construction water line. It is calculated as the weight of the ship and the weight of the cargo (here: the crew with all belongings, drinking water, fuel, eatables, etc). Weight of the boat is considered as it is empty.

@@bojanu7212 so you are actually talking about lightship displacement versus fully loaded displacement.

@@deerfootnz Yes, correct. - Lightweight + Deadweight = Displacement. I use the "Weight" of the boat instead "Lightweight" because it is better to understand for most people and the translation in other languages is correct.

Thanks! CarbonBee is extreme light and has very low air and hydrostatic resistance, so we decided that 2x 6 kW electric motors are more than enough. Computer simulation show, we will reach 10-11 knots maximum speed easily... and under sails we can lower the engines and get enough current for Anna's demand 😄.

excellent@@bojanu7212 When do you see the completion...?

​@@pauldegan8324 We don't work in the winter, so few months go out, but we plan to make first tests in 2025

let us share it!

.... and under sails we can lower them and they will generate current, if we need.

Thank you for the info and for the congratulation for Kevin and Anna.

it is: e-propulsion

​@@bojanu7212Great build! How many kw are motors and how big is the prop?

@@DenySmashinton CarbonBee is extreme light and has very low air and hydrostatic resistance, so we decided that 2x 6 kW electric motors are more than enough. Computer simulation show, we will reach 10-11 knots maximum speed easily. The propellers have 320 mm dia.

Thanks! A lot of the information are in the description under the video, and in my answers on the comments in previous videos. It is good idea. I will think in the future about one video which will answer the common questions.

@@bojanu7212 Yes, answering those questions in a video will really help out. I've gone through some of the questions and answers in some of the videos but it's difficult to do that. That's why I'm still asking about these things.

Thank you for your valuable, confusing comment.

Es gibt menschen die keine ahnung von catamarane haben..aber geben unsinnige Kommentare ab !!!

@@bojanu7212 what is confusing? i asked what you're going to use your boat for? because building a carbon boat with no toe rails, and hatches at the bottom of the windscreen windows make absolutely no sense in my mind.

@@pred7949 We will use our boat mainly in marina. On the open see our autopilot will use the boat.🤣 Allegedly carbon boats doesn't need toe rails, but we anyhow install them 🙃😉😂. The hatches will be always closed, and we do not know anymore why we installed them. We will work hard at this to check the idea behind it. 😉🤔🤥🤕

Thank you for appreciation. To be short to your questions: the foam was fixed with screws. There are two separate vacuum infusions for the hull: one for inner laminate and second for outer. The forms were CNC cut, but the bulkheads were cut using computer generated plot. All bulkheads, decks, etc, were cut millimetre exact, covered with carbon fibre cloth and vacuum infused with epoxy. Only some small edge-sanding in few places was necessary to fit it to the hull.

Ohh, yes I will collect some recordings and edit it for UA-cam, soon.

Interesting idea. Please provide more information about this amusing discovery. It would also be interesting for many designers if you could explain how large the wetted area of the boat should be in order the boat will be not prone to flipping.

Thanks! Reading so many nice comments to our project our motivation intensify.

Thanks! We are just now already excited as we think about first sailing. We know, the first trails will not be for weak nerves. 😃

@@bojanu7212 to start such a project one needs nerves from Carbon Steel :)

I think your boat will be closest thing compared to lightning - as far as performance cruising cats are concerned. I would be frightened to be on the water in a 6t cat in bit ocean. However, it looks as though it is very well constructed and will be sailed with very good hands and minds. Cheers@@bojanu7212

@stdntallan Thanks for the nice comment. Nowadays you have satellites and good forecasts for weather conditions. Having fast boat you do not need to go in heavy seas or into storms, but having slow, heavy cat you can't choose weather - the weather will choose you.

Dziękujemy i życzymy stopy wody pod kilem DUO

Dziękujemy !

it looks like we will have the furniture in white colour with some grey elements - however it is still not 100% decision.

How about furniture in naked carbon? It will look $$$$$$$$$!

@@maxprea3745 Yes, it is nice idea and with clear gloss lacquer you will get 3D effect, but we want to paint the walls and bulkheads in the hulls with clear lacquer to get such effect. We made already test and such raw surface painted with clear lacquer, with the light reflections looks extreme good. So, having all the walls in carbon finish, it will be too much when the furniture get the same finish. That is, we want to paint the furniture white and the celling covering will be also white.

Ross, thank you for warm wishes and appreciation, especially since they are from a sailor with such big experience.

Hallo Adolf, yes, 3D printing could be the future if it is offered as a service at an acceptable price to build one-off yachts, and if it allows the use of materials like unidirectional carbon fiber strands. The weight to strength of the 3D-printing boats is still a big problem. Many experiments are currently underway. Let's see...

ua-cam.com/video/U778GYqQghM/v-deo.html

Dankeschön! Wünschenswert wäre auch Zeit...😄😄

@@bojanu7212 Das wünsche ich gleich mit :) Also das ihr nicht zu viel verliert und die richtigen Entscheidungen treffen könnt!