Пікірлер

• 
  @frank_der_schrank675428 күн бұрын

  Hallo, zuerst einmal großen Respekt an euch! Wirklich schönes und sehr inspirierendes Projekt. Meine Frage an euch wäre, wie ihr das alles gelernt habt und ob ihr eine Bootsbau Ausbildung gemacht habt oder ähnliches würde mich sehr interessieren. Würde mich echt über eine Antwort freuen. Grüße

• 
  @bojanu721227 күн бұрын

  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.

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  @paulb98422 ай бұрын

  wo kauft ihr eigentlich eure Materialien?

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  @paulb98422 ай бұрын

  Ich hoffe es geht euch gut und ihr kommt etwas vorwärts mit dem Besten Build das ich je gesehen habe :)

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  @bojanu72122 ай бұрын

  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.

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  @onkelralf40572 ай бұрын

  Grandioses Projekt! Ich hoffe auf weitere Videos! Darf ich fragen, welche Materialstärken ihr für den Außenrumpf verwendet habt? Corematerial und Laminat. Ich repariere gerade eine alten Rennkat und interessiere mich für die Technologie... Grüße von der Ostsee...

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  @bojanu72122 ай бұрын

  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.

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  @AndrewRandston12 ай бұрын

  how does she sail.. ? we need a video!!

• 
  @bojanu72122 ай бұрын

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

• 
  @Weyni774 ай бұрын

  Amazing, do you know the weight of the main structure? ( hull )

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  @bojanu72124 ай бұрын

  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.

• 
  @mike-cook4 ай бұрын

  That looks amazing. Well done !!

• 
  @bojanu72124 ай бұрын

  Thanks! Nice you like it.

• 
  @CorvetteCarCraft5 ай бұрын

  Please post more! How did you get the structural requirements figured out? Is it also something you calculated in your CAD or did you outsource to a structural engineer? I'm interested as I design a cat

• 
  @bojanu72125 ай бұрын

  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. 👍

• 
  @svZia-Switch516 ай бұрын

  I love the crossbeam and longeron arrangement on that boat!

• 
  @jeyseychelles13706 ай бұрын

  Second first launch

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  @bojanu72126 ай бұрын

  ;-) ... 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.

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  @jeyseychelles13706 ай бұрын

  You need to work on your story telling skills I mean the video is good and you are talking about everything we need to hear but using the same information you can make it more interesting So basically if you look at the video when you doing voice over and you feel like you have nothing to say so, when we look it we see it the same way because the way you talking you make us view the video the same way as us If you dont like my criticism i will not give any but trust me i love your videos I was searching for it all over KZread i didn’t knw what keywords to use

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  @bojanu72126 ай бұрын

  Thank you for the comment. You are correct because most of the videos on KZread, 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, KZread 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.

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  @jeyseychelles13706 ай бұрын

  @@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

• 
  @marekwartecki51279 ай бұрын

  Wielkie i szczegolne pozdrowienia dla Ani i Kevina. Wasze dokonania sa godne najwiekszego i najszczerszego podziwu!!! Wasza CarbonBee nabiera juz coraz bardziej realnych ksztaltow. Nie moge sie doczekac Wielkiego Wodowania!!! Dajcie mi znac kedy to przyzekam, ze sie stawie...

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  @bojanu72129 ай бұрын

  Dzięki! Naturalnie Wielkie Wodowanie będzie ogłoszone. 🙂

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  @jolantajanuszewska20459 ай бұрын

  WSPANIAŁA ROBOTA!! Widac postepy prac. Zasubowalismy i bedziemy na bierzaco podziwiac postepy. Wytrwalosci w realizacji marzen oraz pozdrosy dla Ani, Bogusia i Kevina😉

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  @jakobtheinventor9 ай бұрын

  You guys are amazing. What a build. Glad to see Anna and Kevin happy. Thank you for sharing your boatbuilding with us.

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  @AntoineGrondin9 ай бұрын

  Funny to find this, I've been building the same type of carbon fiber leg extension for two ePropulsion Pod 6.0. I was just laminating it yesterday! My usage is on a regular outboard electric hydraulic tilt/trim thing on my Seawind 1000. First I made the legs in steel for testing and now I'm redoing them in carbon fiber with an hydrofoil type of fairing around the flange where it attaches. The core is 3D printed ABS, with a carbon fiber epoxy cast foot, blending into a mix of unidirectional and plain weave on the skin.

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  @bojanu72129 ай бұрын

  Super! How do the Pods perform?

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  @AntoineGrondin9 ай бұрын

  @@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!

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  @AntoineGrondin9 ай бұрын

  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.

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  @bojanu72129 ай бұрын

  @@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.

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  @AntoineGrondin9 ай бұрын

  @@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.

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  @deerfootnz9 ай бұрын

  Weight is different from displacement?

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  @bojanu72129 ай бұрын

  Yes. See the description under the video.

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  @deerfootnz9 ай бұрын

  @@bojanu7212 how can weight and displacement be different?

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  @bojanu72129 ай бұрын

  @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.

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  @deerfootnz9 ай бұрын

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

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  @bojanu72129 ай бұрын

  @@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.

• 
  @jareddavid659 ай бұрын

  Wow, just wow!!!!!

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  @romanatepper82769 ай бұрын

  What a tremendous project! A fantastic family! Congratulations and speedy recovery for Ania!❤❤❤

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  @pauldegan83249 ай бұрын

  Wow... that new propulsion system is great.... I am very interested to see how this progresses.... well done...

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  @bojanu72129 ай бұрын

  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 😄.

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  @pauldegan83249 ай бұрын

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

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  @bojanu72129 ай бұрын

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

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  @thenorthcrown21449 ай бұрын

  One of the best catamaran builds on KZread and (almost) no one cares - typically German. I can't wait to see it finished, this bee will fly !

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  @paulb98422 ай бұрын

  let us share it!

• 
  @rolfnilsen63859 ай бұрын

  You are doing some great work here! Those electric motors with the arrangement for raising and lowering was really something special.

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  @bojanu72129 ай бұрын

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

• 
  @svenafsvitjod18919 ай бұрын

  Thank you for re-uploading, video plays perfectly now 😎 Not much left to construct on CarbonBee it seems. Congratulations on Kevins engineering degree and Annas new knee also.

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  @bojanu72129 ай бұрын

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

• 
  @_r_ma_9 ай бұрын

  Great content! Thank you for the videos! This is such an incredible build!

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  @hellotoyou47559 ай бұрын

  Hard to see, but what is the brand and size of the motor? Thanks

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  @bojanu72129 ай бұрын

  it is: e-propulsion

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  @DenySmashinton9 ай бұрын

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

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  @bojanu72129 ай бұрын

  @@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.

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  @robertlaird67469 ай бұрын

  1st :) Beautiful boat! I hope that you come out with a video explaining all of the details like dry weight, measurements, cost of the materials to make the hull out of carbon fiber and all of that sort of stuff.

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  @bojanu72129 ай бұрын

  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.

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  @robertlaird67469 ай бұрын

  @@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.

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  @rayboucher47910 ай бұрын

  Looked like from the top to me !

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  @pred794910 ай бұрын

  what is the mission of this boat because no toe rail and hatches at the bottom of your front facing window is just a couple of the things that are very confusing

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  @bojanu721210 ай бұрын

  Thank you for your valuable, confusing comment.

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  @erichdatzkow38365 ай бұрын

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

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  @pred79495 ай бұрын

  @@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.

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  @bojanu72125 ай бұрын

  @@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. 😉🤔🤥🤕

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  @stdntallan10 ай бұрын

  This is an incredible project - just brilliant! I really like the construction method. I am considering using a similar process for a carbon fiber dinghy - similar to the OC Tenders. I consider either doing a hand layup with vacuum bagging or a resin infusion in a similar process to yours. My thoughts 1) build a support structure with horizonta woodenl supports, 2) gluing all of the foam panels together with thickened epoxy around a frame making it airtight while temporarily fixing the outer foam panels to the horizontal supports 3) put 4-6cm of unitdirectional along the edge of hull form to allow a place to tape and seal the vacuum bag 4) lay out the inner skin and position the carbon inner skin for infusion 5) seperate the the mold from the outer hull 6) layup and infuse the outer skin. How did you fix the foam foam panels to the horizontal wood strips? Did you fix the foam panels with a screw or temporary glue to the support frame and horizontal strips? How did you prevent the vacuum from pulling the foam panels out of position and moving inward? I think it is brilliant that you just deconstructed the form and reveresed it for the other side! Did you CNC cut the foam panel bulkheads prior to lamination? Congrats on your progress - I have been thrilled looking at this project and it has given me some inspiration. I would like to learn more about this process! Cheers

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  @bojanu721210 ай бұрын

  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.

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  @garyhorton928010 ай бұрын

  Good to have an update

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  @bojanu721210 ай бұрын

  Ohh, yes I will collect some recordings and edit it for KZread, soon.

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  @HS-vu2zf10 ай бұрын

  Respekt für Eure Leistung. Der Katamaran hat sehr schöne Linien. Ich wünsche gutes Gelingen und, daß Ihr weiterhin Freude damit habt.

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  @pred794911 ай бұрын

  too little wetted surface area, this boat is going to be prone to flip

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  @bojanu721211 ай бұрын

  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.

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  @zanebrimson777711 ай бұрын

  Thank you for sharing your knowledge and skills. This is what makes KZread, KZread University!

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  @ArturRoszczyn11 ай бұрын

  Great job guys as always!

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  @smokejaguar6711 ай бұрын

  WOW she is a beauty

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  @chrischris855011 ай бұрын

  Looks Awesome! Hope you have the motivation to finish it.

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  @bojanu721211 ай бұрын

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

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  @robertlaird674611 ай бұрын

  Looking forward to many more videos from your family. Awesome boat!

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  @graeme-sailingskeptic11 ай бұрын

  Good stuff Bo!

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  @CheersWarren11 ай бұрын

  Thank you for update I enjoy your build process that I am very familiar with . Cheers Warren

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  @KiwiSkipper11 ай бұрын

  Great to see some progress ..even if slow. All good things come with time.

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  @oneiros140111 ай бұрын

  Can't wait for you guys to sail this thing! Looks amazing!

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  @bojanu721211 ай бұрын

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

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  @paulb984211 ай бұрын

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

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  @stdntallan10 ай бұрын

  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

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  @bojanu721210 ай бұрын

  @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.

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  @svenafsvitjod189111 ай бұрын

  The work on CarbonBee is coming along nicely, good job! It's a very cool project to watch coming closer to completion 👍

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  @tlof11 ай бұрын

  It is amazing what can be done, just by a couple of people I'm waiting for the first sea trials.

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  @aleksanderwierzejski134611 ай бұрын

  Gratulacje!

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  @bojanu721211 ай бұрын

  Dziękujemy i życzymy stopy wody pod kilem DUO

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  @marekwartecki5127 Жыл бұрын

  No wiec widzialem czesc 4!! Ufff, wspaniale sie dzieje. Ucalowania dla Ani i usciski dla Was...

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  @bojanu721211 ай бұрын

  Dziękujemy !

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  @drankenkorps Жыл бұрын

  Will you make laminating furniture with wooden furnir?

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  @bojanu721211 ай бұрын

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

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  @maxprea374511 ай бұрын

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

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  @bojanu721211 ай бұрын

  @@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.

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  @rosscarter7600 Жыл бұрын

  I did 5000 manhour crowther 40' cat in 1980, cruised Caribbean 10 yrs, sold her into day charter, memories are still VERY strong and intact. The very best way to consume our finite lifespan. Your build selection & building team are the best sefl-build project I have ever seen. Cheers to you, health, safety, and warm waters.

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  @bojanu7212 Жыл бұрын

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

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  @adolfhitler337 Жыл бұрын

  it takes too much time, why not 3D print? which type of carbon?

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  @bojanu7212 Жыл бұрын

  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...

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  @adolfhitler337 Жыл бұрын

  where is 01. ？

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  @bojanu7212 Жыл бұрын

  kzread.info/dash/bejne/h2trmqmSobTNmLA.html

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  @paulb9842 Жыл бұрын

  WOw ein neues Video. Wünsche weiterhin Gesundheit und Kraft für das Projekt!

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  @bojanu7212 Жыл бұрын

  Dankeschön! Wünschenswert wäre auch Zeit...😄😄

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  @paulb9842 Жыл бұрын

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

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  @captainwin6333 Жыл бұрын

  Boat looks amazing. You have to get that logo on one of the sails.

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  @bojanu7212 Жыл бұрын

  Thanks! Nice, you like the design. Yes, the logo we want to place on the hulls' front and on the main sail.