Beautiful Cat! Its lines are amazing. Congratulations.

@bojanu7212

2 жыл бұрын

Thank you. Pleased to hear it .

Thank you for giving us the opportunity to share this exciting moment (1st splash) in your exciting project.

@bojanu7212

2 жыл бұрын

Thanks for watching!

Wytrwałości życzę !!!

Beautiful boat

Bardzo Wam Gratulujemy. Niesamowite!!!

@bojanu7212

2 жыл бұрын

Dziękuję

Good job guys!!

verry cool!

Pięknie...👏👏👏💪💪💪👍👍👍😎☀️😉

What a pretty boat.

Bogdan wspaniała konstrukcja moje Gratulacje Marzenia trzeba spełniać !!!!

@bojanu7212

2 жыл бұрын

Dziękuję

Dear Bogdan, you made a wonderful catamaran , I can feel it, it is seen. Very big applause to Anna & Kevin as well. I wonder your story of design custumised cat perfect fit for your family needed also " Racing Properties " - beside weekend cruising. I was started with Topcat F2 then Dart 18, those are beachcat of course but now, CarbonBee will be in my dreams. You inspired me with CarbonBee more than Gunboat, your statistic chart and CarbonBee performance was amazing, because since many years I could not heard about performance & comfort at the same time because of huge price level, for that reasons your success is amazing level , Congratulation indeed, it is very easy to watch your video in 5 to 10 minutes, but you and your family efforts , passion will be appreciated... So please keep inform us, as you can with new videos , about all details, hope to finish as soon as, I wish you and your family happy sails for next summer... Warm regards, Turan Aray / Istanbul - Turkey

@bojanu7212

2 жыл бұрын

Thanks, glad you like our project and thank you for the warm wishes. We need little bit more time to finish the project, because of the winter here in Berlin and low temperatures. Practically we have to stop our building activity for few months. We plan that we can finish our project within next two years..... and than CarbonBee will sail in Mediterranean Sea and for sure we will visit Turkey as well. Stay in contact.

A project like that and thanks for taking time to video and edit...

Looking forward to updates and more backstory. What an amazing project.

@bojanu7212

2 жыл бұрын

In video Part-01 are some pictures from the building process. See: kzread.info/dash/bejne/h2trmqmSobTNmLA.html

Nice work

Self made carbon cat ? Wow 😮. Very good 👍

@bojanu7212

2 жыл бұрын

Thank you 🤗

Wunderschön! I caught Cat fever around this time last year and I've been researching different methods & materials on building my own. I loved the simple elegant solution for the fabrication of your hulls, brilliant! I'll be looking forward to future progress! Herzliche Glückwünsche!

👏👏👏👍 Congratulations good job.

@bojanu7212

2 жыл бұрын

Thank you! It was a good mix between intellectual, engineering and hand work, starting from the design to the current stage.... still not finished.

Epic build.

@bojanu7212

2 жыл бұрын

Thank you 🤗

Cool looking cat

Wielkie gratulacje drodzy rodacy . Niech Bóg Wam błogosławi.

@bojanu7212

2 жыл бұрын

Dziękujemy!

amazing for a carbon catamaran of a size large enough and homemade. Waiting for construction and progress. greetings from Indonesia

Wow ! Just discover this built! I'm very interested in following it so please let us watch it with numerous videos. Happy built, and my best for the next. Cheers from France 🇲🇫

You are amazing!!! What a project! Congratulations!!!

@bojanu7212

2 жыл бұрын

Glad you like it!

@romanatepper8276

2 жыл бұрын

@@bojanu7212 I do admire it!

WOW

@bojanu7212

2 жыл бұрын

Thanks!

Wielkie dzielo.Godne podziwu . Gratuluje Bogdan za niepowtarzalny projekt ...no i prace , wytrwalosc. Oczywiscie bez udzialu Twojej Ani i Syna Kevina nie powstalby tak doskonaly i niesamowity " Olbrzym" ( Moby Dick). Zycze pozytywnej energii i zadnych przeszkod w dokonczeniu tego Projektu. Pozdrawiam - iRENA

@bojanu7212

2 жыл бұрын

Dziękuję. Ciesze się, że nasz projekt się podoba

Gratulacje! Dobra robota! Looks great and looks really fast! Powodzenia!

@bojanu7212

2 жыл бұрын

Dziękuję

She's a big unit.

Looks awesome, very impressive! 👏😎🏖🌴☀️🇦🇺

@bojanu7212

2 жыл бұрын

Thanks 👍

/look forward to seing her outfitted.

please take more video of the build process. this is an amazing cat!

Incredible work. Very interesting. Looking forward to back story and the work that has been accomplished so far. I see a lot of potential in this KZread channel. Thank you for sharing.

@bojanu7212

2 жыл бұрын

Thank you for watching and I am glad you like our project.

Magnifique catamaran, bon courage pour la suite 😀

@bojanu7212

2 жыл бұрын

Thank you!

Amazing build, you are on another level!

@bojanu7212

Жыл бұрын

Thank you!

Well done you must be very proud ❤

@bojanu7212

Жыл бұрын

Ohh, thank you! It is true that sometimes, looking on the boat, we can not believe ourselves, that we reached to the stage (see video 06) of the whole project.

All i can say is what a great looking and fast cat you have .. L.A Rob

@bojanu7212

2 жыл бұрын

Thanks! 🤗

nice lines, good luck

@bojanu7212

2 жыл бұрын

Thanks

I love your country so freedom and DIY 👍💪👏. My country Singapore no way. 😡

Pozdrawiam z Olsztyna: Pszczółkę czyli dawniej Dzidzię i Bogusia i waszego Synusia. Jola z Dabrowszczaków 24 m 4. Jestem pod wrażeniem Waszych poczynań.

@bojanu7212

Жыл бұрын

Dziękujemy. To niesamowite wspominać nasze kontakty sprzed tylu, tylu lat. Zaraz tez wyciągnęliśmy zdjęcia z tego okresu. Spróbujemy Cię odszukać. Pozdrawiamy.😀

With narration this would top 100k followers edit ps Her lines are beautiful

@bojanu7212

2 жыл бұрын

We will try our best with the next's videos. Thanks.

Hello Bogdan, we are super impressed! Could you please dedicate a video on the total costs of the build? Engineering costs, rental of space/cost of tent, materials foam/epoxy/fiber/wood moulds, cnc router work? Etc etc etc thanks!

@bojanu7212

2 жыл бұрын

Thanks, it is nice You like the design. CarbonBee is still not finished. I collect naturally all the bills and costs to get overview, but we still have running costs. I will try in the future, after finishing the building process, to make a video with information about the costs and materials as well.

@DC_DC_DC_DC

2 жыл бұрын

@@bojanu7212 very excited!! It will help in deciding to do this ourselves or not in the future :)

@bojanu7212

2 жыл бұрын

Sorry I didn't notice your response. I have answered on one comment as follow (hope you will find some of interesting information for you): CarbonBee is in the stage where all bulkheads, vertical divisions elements, floors, horizontal panels (for e. beds in cabins), and fast all structural reinforcements are inside. Painting is not yet fully finished. As I said in response to one comment, considering that somebody will not need to do many trials and spent time for a lot of considerations, up to this stage, will need ca. 3000 - 4000 working hours. I don’t want just now to talk about the cost of the materials, because in every country the prices are different, but I can give estimated quantity of materials to get to this stage of building process: It is ca. 890 kg carbon fibres different kinds, ca. 620 kg Epoxy, ca. 740 kg structural PVC foam. Extra materials are the wood for mould/frames and all the components for vacuum infusion including ca. 40% extra epoxy, which goes with the vacuum infusion’s components after infusion into the basket - it is not too bad and cost much less then hand lamination, because we spare a lot of work-hours, cost for potential workers for lamination and their mistakes. It is very clean, easy to control process and we can reach ca. 60% carbon fibres in the laminate. 5-10% of the materials must be also added for wastage. The most boring and hated activity was the filling/sanding process for the hulls, despite that we had only in very few places the difference up to 1mm. All the jobs were done generally by two persons, even the rotation of the hull I did together with Kevin. Also, all parts were light and easily to move by max. two persons.

@DC_DC_DC_DC

2 жыл бұрын

@@bojanu7212 thanks that is useful indeed. What are the kg prices you've paid for those three materials in such large quantities (big discounts compared to consumer?)

@bojanu7212

2 жыл бұрын

@@DC_DC_DC_DC You can count ca. 20-30% for volume discount for the materials. Check your supplier in your country.

No, With your expertise, I would say you have plenty of interesting materials to talk about. Look forward to more video.

number 999 subscriber here ;)

yeeeeeeesssssssss

Bonjour, well done, it is impressive to see a boat self-built by a family. It requires technical and practical knowledge, plus access to ressources. I've read introductory description and almost all comments for Part01 and Part02, but I fail to see the time it has effectively taken you to finish the hull (without any fitting) and set it into water. What is the amout of material used (linear metres and width of reels, litres of epoxy, paint, ...etc...) ? Perhaps, also what is the rough budget for the bare hull ? Could this information (timespan, material specs and cost) appear in the description ? Merci et bonne continuation.

@bojanu7212

2 жыл бұрын

First, thank you for the appreciation. I see, that many people want to know more details than I already wrote in my responses. CarbonBee is still not finished and is in the stage where all bulkheads, vertical divisions elements, floors, horizontal panels (for e. beds in cabins), and fast all structural reinforcements are inside. Painting is not yet fully finished. As I said in response to one comment, considering that somebody will not need to do many trials and spent time for a lot of considerations, up to this stage, will need ca. 3000 - 4000 working hours. I don’t want just now to talk about the cost of the materials, because in every country the prices are different, but I can give estimated quantity of materials to get to this stage of building process: It is ca. 1.2 t carbon fibres different kinds, ca. 0.85 t Epoxy, ca. 0.6 t structural PVC foam. Extra materials are the wood for mould/frames and all the components for vacuum infusion including ca. 30% extra epoxy, which goes with the vacuum infusion’s components after infusion into the basket - it is not too bad and cost much less then hand lamination, because we spare a lot of work-hours, cost for potential workers for lamination and their mistakes. It is very clean, easy to control process and we can reach ca. 60% carbon fibres in the laminate. 5-10% of the materials must be also added for wastage. The most boring and hated activity was the filling/sanding process for the hulls, despite that we had only in very few places the difference up to 1mm. All the jobs were done generally by two persons, even the rotation of the hull I did together with Kevin. Also, all parts were light and easily to move by max. two persons.

👍👍👍👏👏👏💖

@bojanu7212

2 жыл бұрын

Danke. Ich freue mich, dass unsere "CarbonBee" Dir gefällt.

Exxcssspetáculo

👏🏻👏🏻👏🏻👍✌🏽

@bojanu7212

2 жыл бұрын

Thank you 🤗

When do you expect to finish it? Looking forward to see you sailing. Powodzenia!

@bojanu7212

2 жыл бұрын

We plan to have CarbonBee sail-ready within two years. Actually two seasons, because we can't work in winter. Dziękuję!

From scratch! Impressive! Well done guys. Do you have any specs you can tell us? I caught the weight, but I would love to know the Beam, expected draft (Dagger boards up), things like that. Impressed with your work. That's quite an undertaking. Do you intend to sail around as a family? Are you going to sail the world in it, or just weekends / short hops around Germany, or race it?

@bojanu7212

2 жыл бұрын

CarbonBee is 15m long and 9,3m wide. Draft 2,5/0,47m. Ruder and electro-motors are also retractable. Weight empty is 3,8 - 4,0 t. depend on inside equipment. Anna wants all possible inside the boat ;-( , then we will tend to 4,0t.... but Kevin and I will fight. Displacement bis construction-waterline is 6.0t (0,23t/cm). Sails area including rotating mast is 140m². Our plans? First short trip to Baltic Sea to check everything, then Mediterranean Sea, may be 1-2 years, after that all is open. Let see. Racing?... Sure CarbonBee will like it!

Good job, Bo Janu. Incredible self-made Hi-Tech project quickly released by masterful little family! Ur CarbonBee's light n muscular like real racing cat. Tell me about it bridge's clearance: high value necessary for glide without slaps from waves and pitch downs. Deep bridges usually dramatically reducing speed any condo-marans... Will you make the carbon rotation mast self-made too? Thanks for detailed videos!

@bojanu7212

2 жыл бұрын

Thank you very much! You are right, the low bridge clearance is a big problem of production catamarans. CarbonBee at full displacement has the bridge clearance 0,95 m, but under the cockpit, where typically the waves slap the clearance is 1,15 m. In racing trim all will be ca. 7 cm higher. Yes, CarbonBee will get rotating mast. I am just busy with the design and calculations.

Sir a very awesome Build On this Cat, Please think of Doing a week toWeek videos for your Fans this will be awesome to See being Built. Thanks and God Bless you and Family.

@bojanu7212

2 жыл бұрын

We will try to manage to make more videos. Unfortunately, now due to winter temperatures we are forced to stop all the building activities.

@gregoryh4601

2 жыл бұрын

@@bojanu7212 thanks for the Reply back. Will you use or have seen the Carbon/Kevlar Fiber Blend? Will this Cat ever go Back in the Ship House? Will you do dyneema rope rigging? Well take Care

@bojanu7212

2 жыл бұрын

We used Kevlar in some places, but for the reason only. The mix Kevlar/Carbon cloth is not good if you want stiffness. For the stiffness works only carbon. Kevlar will add weight in such laminate only. Otherwise, if you want more flexible laminate, carbon fibres have nothing to do inside. Kevlar has also poor comprehensive strength. Yes the rigging will be dynema.

Hi Bogdan, Where such beauty is being born secretly? No wonder you receive well deserved applause! Did you use NC pre-cut foam panels for all flat parts? How long it took to prefab the parts? What is the design displacement? Really nice hull form and Congrats for emazing achievement 👌 Wojciech

@bojanu7212

2 жыл бұрын

Thanks! I am glad you like the design. For big flat parts, like for example deck, the dimensions were taken directly from the computer. Small flat parts were drawn direct on foam from the plotted print. All these parts didn't need very small tolerances in dimensions. Only the frames for the hulls were cut by CNC machine. See our first video - Part-01: kzread.info/dash/bejne/h2trmqmSobTNmLA.html - it explain the building process. Design displacement is 6.0t.

Wow - That's a phenomenal looking hull and a huge project. I built an F-9A tri (31' trimaran from Ian Farrier's plans) in the '90's using carbon over duracore striping and that was a very big project. A 50' carbon cat to your own design is huge. How many months to get to this stage? Best of luck and success to you and your amazing project.

@bojanu7212

2 жыл бұрын

Thank you! I calculate that 2 person can get this stage within 12-15 months if they get good non-limited place (workshop) and can make parallel some activities. For us it was longer. First: we couldn't work due to low temperatures almost 5-6 months in year. Second: Kevin has very intensive university study and could invest ca. half of the time as I. Third: Anna had in between to fight with two serious cancers and was most of the time out of activity. Not to mention that during the building they were a lot of trials and considerations how to do this or that. That, and collection of the materials and tools costed time. The technology was the most important thing, but to get it right costed us also a lot of time.

Really impressive, thanks for sharing. I'm busy attempting same - design & build from ground up. But I am in no way near an engineer. Lots of reading; spreadsheet calculations & learning to draw in 3D. I'd be interested in understanding your cost projections & time line, if willing to share. Are you considering making build plans avaialble at any time?

@bojanu7212

2 жыл бұрын

Thank you! I wish you success in your design. It is always very exciting process. Please check my replays on other comments. I answered there many questions and wrote some information.

If they are pushing you out of the shed? It seems half empty already what do they have going in there?

Postei como não gostei..por que eu gostaria de estar ai participando dessa jóia...parabéns

Congratulations on your progress so far. You are an inspiration to me and others. What software did you use for the catamaran design and modelling?

@bojanu7212

2 жыл бұрын

Thank you! I am using software from AeroHydro, Maxsurf, Rhino and Solid Edge mostly for FEA. During the design process and building process we prepared also some Excel calculations sheets to check many variables.

@user-zy3cc8lh8k

2 жыл бұрын

@@bojanu7212 mobile number Watsap

Ist so Nice so perfekt the best catamaran SeLf Bild i Seen reley Nice Work ....i wold like to Ask You from where You the plan.. Thanks

@bojanu7212

2 жыл бұрын

Glad You like it! Thanks! It is my project and raised with all the constructions lines and calculations in my computer under the name JANU-15. (see also the Part 01 video) As I wrote in the description under the KZread video I couldn't find a catamaran which would suit me and my small family regarding Performance, Comfort and Cost. The two first factors resulted from the design I made. Third factor we try to manage by building the catamaran ourself. We all have sailing experience and we try to use it at best we can in our project. We hope that our friends and friends from friends will have o lot of fun to sail "CarbonBee" as well.

Wow! Can you tell us your overall build timeline to get to this level of finish? Very impressive.

@bojanu7212

2 жыл бұрын

CarbonBee is still not finished and is in the stage where all bulkheads, vertical divisions elements, floors, horizontal panels (for e. beds in cabins), and fast all structural reinforcements are inside. Painting is not yet fully finished. As I said in response to one comment, up to this stage, somebody will need ca. 3500 working hours. I calculate that 2 person can get this stage within 12-15 months if they get good non-limited place (workshop) and can make parallel some activities. For us it was longer. First: we couldn't work due to low temperatures almost 5-6 months in year. Second: Kevin has very intensive university study and could invest less than half of the time as I. Third: Anna had in between to fight with two serious cancers and was most of the time out of activity. Not to mention that during the building we made some trials and spent time for considerations how to do this or that. That, and collection of the materials and tools costed time. Only the technology was the most important thing which saved us a lot of time. Season 2022 is our 5th.

Beast of a machine, magnificent work, what did it weigh ? it did not displace a lot of water, just a few tons by the looks. Awesome job.

@bojanu7212

2 жыл бұрын

Thank you! CarbonBee is not fully equipped now. Empty, ready to sail will weigh 3,8t.

@stephenwalker6763

2 жыл бұрын

Wow that's light! 3.8 tons?

Great work, How long did it take to build the main structure?

@bojanu7212

Жыл бұрын

Thanks! CarbonBee is still not finished and is in the stage where all bulkheads, vertical divisions elements, floors, horizontal panels (for e. beds in cabins), and almost all structural reinforcements are inside. Painting is not yet fully finished. As I said in response to one comment, up to this stage, somebody will need ca. 3500 working hours. I calculate that 2 person can get this stage within 12-15 months if they get good non-limited place (workshop) and can make parallel some activities. For us it was longer. First: we couldn't work almost 5-6 months in a year due to low temperatures . Second: Kevin university study is very intensive and he could invest only one third of the time as I. Third: Anna had in between to fight with two serious cancers and was most of the time out of activity. Not to mention that during the building we had to make some trials and spent time for considerations how to do this or that. That, and collection of the materials and tools costed time. Good that the whole technology, which we developed, was the one most important thing which saved us a lot of time. Season 2022 is our 5th.

That's very impressive! - Are you a naval architect, or engineer in any way? I suppose you've to calculate on strength with the carbon fibre layers and such. I'm deeply impressed with your work! - You guys seems to be fast and do the job VERY well! I look forward to seeing more videos! (And if you decide to share the plans, cost and more, maybe you've created a new dream for me!) Best regards, Simon, Denmark

@bojanu7212

2 жыл бұрын

Thanks, glad you like the design. I am MSc Mech. Eng. Now I am retired and have a time. Kevin is finishing his Master study, but despite that he manages to find a time for our family project. Yes, it was a lot of engineering calculations, but today's you can manage a lot using a computer. When CarbonBee starts to sail and will fulfil our predictions or surpasses them :-) , I will decide how to share the plans and technology for interested amateurs.

@MrGentlebutfirm

2 жыл бұрын

@@bojanu7212 Absolutely great thinking. Thanks!

@tamhnguyen

2 жыл бұрын

May I ask what is MSc stand for?

@bojanu7212

2 жыл бұрын

@@tamhnguyen It is: Master of Science

How many people have been working on this project? Those hulls look very beautiful. How will your boat be powered?

@bojanu7212

2 жыл бұрын

Thanks, glad you like the design. Answers: ca.1,6-1,7 people . Two retractable electric motors. Please look on other comments and my responses. All informations and your questions as well are there explained.

@rbnhood39

2 жыл бұрын

@@bojanu7212 , thank you very much and I will. I can’t wait to see when your boat is finished. If I lived near you guys I would offer to help just for the pure enjoyment of it.

Mightily impressive. What is the layup of the Hulls? The inside and outside skin mat type and weight in g/m^2 and type and thickness of the core material. please.

@bojanu7212

2 жыл бұрын

Thank you! We use UD carbon-fabric 300 - 850 g/m² and Biax carbon-fabric 300 - 600 g/m² . Depends of the calculated stresses and forces in particular place the fabrics were laid with specific thickness and directions before infusion. Thickness and direction of the fibres inside the laminate is very very variable. In some few places we used also Kevlar. We use also very different thickness, density and kind of PVC core. Mostly Airex.

I make black stuff too - this is impressive. How long has the process been? Who is the designer? Will you be installing systems yourself? Thanks!

@bojanu7212

2 жыл бұрын

I am sure, you can find the answers on your questions in the description under the video and in my responses to other comments.

Gorgeous! Curious why "CarbonBee"? Cheers!

@bojanu7212

2 жыл бұрын

Pleased to hear you like our project. Why "CarbonBee" ?? The material we use to build our Cat is carbon. Anna's nickname at home is Bee (Pszczółka).

@MrJhchrist

2 жыл бұрын

@@bojanu7212 Thanks, that's sweeter than I would've guessed

Great work, The design of the rudder box is different. Is the rudder and post designed to pivot away if an obstacle is hit? Gil Bailey, Australia.

@bojanu7212

2 жыл бұрын

Yes, the rudder will go up if something hit it or if the crew want to have less draft (0,47m). The construction is much more complicated, but we decided, considering safety, to have it.

@gilbailey1979

2 жыл бұрын

@@bojanu7212 Thank you for the reply, Yes I think the design will have a big impact in the future of cruising boats. Another question is how do you intend to have the boat driven under mechanical power. A fixed propellor shaft that will ride over an obstacle or a pod, both protected by the stubby keels? I was watching a KZread show "Sailing into Freedom " and Peter made reference to a alloy cat home built in Asia and utilized this style of rudder design and I thought it was a fantastic design and also a very good safety factor also. I think the alloy cat also had a draft of about the same as your boat. Gil..

@bojanu7212

2 жыл бұрын

CarbonBee will get two electric motors, which will be retractable and placed under the bridge.

Update us, we need more videos. Especially from the processes before this step

@bojanu7212

2 жыл бұрын

In video Part-01 are few pictures from the building process. See: kzread.info/dash/bejne/h2trmqmSobTNmLA.html

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

@bojanu7212

3 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.

The carbon that is being used is a special marine grade???

@bojanu7212

2 жыл бұрын

You can use for example ZOLTEK PX35 or similar from other manufacturers.

@SteinVarjord

2 жыл бұрын

There are many different types of carbon fibre and how they are oriented etc, but there’s no marine specific grade. Carbon fibre is not sensitive to sea water. Also, when it’s put on a boat it’s encapsulated in epoxy resin, which is also totally resistant to water. Epoxy is, however, sensitive to long exposure to sunlight, so it needs a covering paint. Carbon is many times more expensive than glass fibre, and it demands more sophisticated build methods, so it’s not a suitable material for the inexperienced. The infusion process looked easy here, but it isn’t! :-)

@bojanu7212

2 жыл бұрын

Correct! Thank you Stein for supporting me and explaining things more sufficiently.

Magnificent build .. reely super! Im for last 2 years in studying build construction .. itc. Anyway I want to build simillar size but not like your "raketa :) " ..more like moving snale home. The last thing is source details is price for hull .. that is last thing before i go with green light. I would prefer to pay for material in range of 50k€..however your information come to a lot more.. So i must be wrong somwhere. You said you had 40% waste (that i didnt get it or missunderstood) -ok for 5-10%. You use about 900kg og Karbonfiber (how many meeters was that.)? And foam core..how many m2 did you use..That shocked me how much sellers wants for that..Im shure there is somme "marine price here-or offshore price as we called in Norwej". As for construction.. i have diffrent plan because of ease of build.. but your method just surrprised me. HOw did you form to shape foam core? And I assume you glued together fome core so it hold vakum.? Did you use gel cote or only paint... That part I need to studdy more because I want without gels ..only paint. Thank you.. And zer gud. Im shure You will be inspiration for many people!

@bojanu7212

2 жыл бұрын

Thanks! I am pleased you like our project. If you want in future to build such boat, you can order the whole materials and ask for bulk-discount. It will be cheaper. Don't build also any boring, slow boat, which must use a motor for sailing. Such catamarans are for sale everywhere. Why to build one more? You ask what is the ca. 40% waste. It is the extra amount of epoxy which is trapped in the components of the vacuum infusion process (folie, tubing, peel ply, vacuum mesh, etc.) These components are after vacuum infusion separated and put in trash. For other materials you can count ca. 5-10% extra amount for waste. We do not use gel-coat. The hulls do not have end-painting yet - it is only the primer just now.

@drankenkorps

2 жыл бұрын

@@bojanu7212 I have to make slow because hor travelling places where is - 30 daly.. Thats why I think more and more to go for trimaran. And I do have radical changes for hull design and rudders as dagger boards. Do 3by chase have more pictures of infusion process.. More specifically about mold and foam part? I have seen somwhere email.. I can write there. Regards M

@bojanu7212

2 жыл бұрын

@Jean Luc De Marc For sailing with my family and friends I want to design a 17m trimaran and this design is sailing but in my computer only. Finally due to inside living space I changed to design of a catamaran. So was born JANU-15, our "CarbonBee". In the part 1 video are some pictures of the vacuum infusion process. Few interesting designs of trimarans has Kurt Hughes and he can customise them. Look there.

Lieber Bo, gibt es die Möglichkeit euch beim Werken zuzusehen? Ich plane für meine nun mehr 5 Köpfige Familie den Selbstbau eines Segelcatamarans im lowbudget Bereich und würde mich gern mit dir Austauschen. Liebe Grüße und mega schönes Projekt...

@bojanu7212

2 жыл бұрын

Enrique, wir starten den Weiterbau in der nächsten Woche, und werden bis späten Herbst, es Temperaturen erlauben an unserem Projekt arbeiten. Wir sind in Berlin und Du kannst uns gerne besuchen. Unser Projekt ist zwar nicht von denen die man kostengünstig nennen kann, aber natürlich wir können darüber diskutieren, wenn wir uns treffen. Übrigens, in meinem Computer habe ich auch eine kleinere Version (JANU-12) zur Anschauen. In den Antworten unter Kommentare habe ich auch grob die Menge von Materialien für den JANU-15 Rumpf aufgelistet, wovon kann man die Kosten kalkulieren. Es gibt auch ein paar Informationen unter den Part-01 Video.

@domrepenrique

2 жыл бұрын

@@bojanu7212 Lieben Dank Bo, ich werde mir mal die Kommentare durchlesen um einen ersten Einblick auf die Kosten zu bekommen, bitte sage mir noch wo ich euch in Berlin genau finden kann, habe aktuell Nachwuchs bekommen und werde die nächsten 2 bis 3 Monate nicht reisen können, aber im Sommer würde ich euch gern besuchen kommen. Soll ich dir dann per E-Mail schreiben und würdest du mir dann eine Telefonnummer da lassen, dann könnten wir im Vorwege ein wenig Koordinieren. Gruß Enrique

What about certification, is there such a thing for floating things? Or anything anyone can build has the right to sail? Also what about insurances, will they insure a custom-DIY build? At the same rate or higher?

@bojanu7212

2 жыл бұрын

JANU-15 (CarbonBee) is designed according to the Directive 2013/53/EU to get CE certification. However the Directive doesn't apply if you build for own use and not sell the boat in EU within five years. Casco insurance, depends of the insurer will be slightly higher.

Carbon or carboard box?

@CorvetteCarCraft

2 жыл бұрын

Geezer or gayzer?

if frame is strong between if not metal .?

@bojanu7212

Жыл бұрын

What do Lamborghini, Ducati, airplane manufacturers, etc. know about it? 😉

@ApprenticeGM

8 ай бұрын

@FelixSamulevich - the beams between hulls are made from carbon fibre, infused with epoxy under vacuum. It is incredibly light / stiff / strong - way better than metal. The whole boat is made that way, it is a proven, modern construction method that amateurs can do themselves with excellent results. Google the strength-to-weight specs of vacuum infused carbon fibre vs steel / aluminium / stainless steel. Only titanium would be a worthy competitor and it costs 100x as much.

I don't know anything about carbon fiber but I thought you had to cure it in an oven/autoclave for it to have full effect? How do you cure the epoxy, Or is this not true?!

@bojanu7212

2 жыл бұрын

This is true for pre-preg materials. (preimpregnated fibres). For others epoxy laminates, depends of the kind of the epoxy resin, the maximal physical properties of epoxy resin can be reach after for example post-curing in 70°C. Such curing is because the resin, not because the fibres. Post-curing accelerate also full curing of such type of the resin, and the laminate is immediately ready to be used with full expected mechanical properties of resin. We are using epoxy resin which gives us designed mechanical properties already in ambient temperature (+25°C)

@noahnoah4526

2 жыл бұрын

@@bojanu7212 May I ask what epoxy you guys are using? I looked online for room temperature cure epoxy and found the term NONA but can't find anything for sale, only a few papers. I guess I have not found the right search term yet.

@bojanu7212

2 жыл бұрын

@@noahnoah4526 There are many kinds of epoxy resin - for hand laminating, for infusion, with different cure timing and cure temperature, with different properties, etc. The best way is to ask the one of the main big supplier in your country, and consult the technical expert to choose the best resin for your laminating method and conditions you have. By the way, to reach the temperature of 70°C in the tent in the sunny days is no problem. Some carbon laminates/parts, if you lay them under the sun they reach easy 75°C. Black colour absorbs the heat.

@noahnoah4526

2 жыл бұрын

@@bojanu7212 Thank you for all the information, I really appreciate the responses. Good luck on the boat, I'm looking forward to more videos.

you have a TON of carbon fiber in this boat. Dare say it is 85% Carbon Fiber? You used High density foam, with Carbon over to top, correct? What a boat! Who did the design/calculations for this boat? Did you pay an expert designer?

@bojanu7212

2 жыл бұрын

Thanks! I am pleased you like our project. Yes, in this building stage CarbonBee weights just 2,5 t. - it is ca. 1,2t carbon fibre. Epoxy resin and Airex make about the rest. All your questions are answered in the description under the video and in my answers to others comments.

why some catamarans have a low hull and others high?

@bojanu7212

Жыл бұрын

I think you mean the hight of the bridge over the water level. A catamaran with a higher bridge is designed to handle larger waves and rough sea conditions more effectively. The increased height allows the catamaran to rise over waves rather than plowing through them, reducing the impact, resistance and ensuring a smoother ride. Catamarans with higher bridges are often found in sailing and power blue-water catamarans, offshore racing catamarans, or those intended for use in areas with larger waves, such as open oceans. On the other hand the catamarans with lower bridge are intended to use as house boats in ports and calm protected waters. It's important to note that the design of a catamaran involves various trade-offs, and the bridge height is just one aspect of the overall design. Other factors, such as weight, weight distribution, positioning of the bridge, sail plan, keel configuration, and overall hull shape, also play significant roles in determining a catamaran's performance and seaworthiness.

Do you have plans?

@bojanu7212

2 жыл бұрын

The design plans are in my computer and I have a lot of hand drawings, and pictures which we took during the whole building process. Sometimes we took the dimensions direct form computer, sometimes we let plot some drawings. The frames for the hulls for example were cut using CNC machine. Previously I didn't intend to share the plans of my design. We considered it as our unique, family project. But now I see, many people are interested an JANU-15 ("CarbonBee"). Maybe in the future, when CarbonBee will be ready for sailing and fulfil our predictions or surpasses it :-) I decide how to share the plans for interested amateurs.

@bahaiwebsites

2 жыл бұрын

@@bojanu7212 I am interested in building

@geterdone6051

2 жыл бұрын

@@bojanu7212 Would love to financially contribute to your endeavor. Your process is the only way I can afford what I want. Plans would be great - but, I know you have your hands full just finishing what you have going already. Thank you for showing us many things and ideas. :) From Texas.

where is 01. ？

@bojanu7212

11 ай бұрын

kzread.info/dash/bejne/h2trmqmSobTNmLA.html

Hallo Anna, Kevin und Bogdan, Ihr seit ja auch aus Berlin, wenn das Boot noch nicht fertig ist, kann ich euch an den WE´den gerne mal helfen, dann lerne ich auch etwas dazu. Ich bin Ingenieur aber arbeite in der Verwaltung und Handwerklich bin ich sehr geschickt.

@bojanu7212

2 жыл бұрын

Hallo Natan, Du bist willkommen. Wir sind jeder Tag in Marina West, Rauchstr.43-45, 13587 Berlin.

@Mr.Nafri_

2 жыл бұрын

@@bojanu7212 Cool, dass freut mich, also seit Ihr auch unter der Woche in der Raucherstr. 43-45. Wenn ja, bis wann seit Ihr immer Vorort, weil mein Arbeitsplatz ist wesentlich Nähe zu euch als dieses von meinem Wohnort ist, sodass ich eventuell nach der Arbeit vorbei kommen könnte, natürlich unter der Voraussetzung, dass Ihr Vorort seit. Ich könnte unter der Woche so gegen 17:00 Uhr Vorort sein und bis 19:30 Uhr helfen, was nicht viel ist, aber ich hätte danach noch ein Heimweg von 1 Stunde und 20 Min. Oder Freitag auch früher, aber diesen Freitag habe ich einen Termin. Ansonsten am WE.

@bojanu7212

2 жыл бұрын

@@Mr.Nafri_ Wir sind normalerweise bis 20:00 da. Auch WE.

@Mr.Nafri_

2 жыл бұрын

@@bojanu7212 Danke für die Info, dann versuche ich mal in den nächsten Tagen vorbei zu kommen. Bis dann, freue mich schon.

How is this project coming along"? It has been 6 months... Are you winning?

@bojanu7212

2 жыл бұрын

We are working further, since we have good weather conditions (temperature). We will prepare the next video shortly.

@cutekidstories

2 жыл бұрын

@@bojanu7212 Glad to hear your still in the game. :)

U speed freek giant hobbies cat. Not a belly full booze croozer

@bojanu7212

2 жыл бұрын

Shortly to say, U hit the spot.

junk rigged schooner correct , carbon fiber free standing mast , free of those pesky stays . kool .

@MrJhchrist

2 жыл бұрын

Wait, what? Did you see something I didn't? Junks are super cool and all, but the pic shows a standard bermuda...

Problem with building your own boat is you become a boat builder, when you buy a built boat you become a sailor, which would you rather be? Just buy a boat

@bojanu7212

Жыл бұрын

Ha, ha, ha... yes it is undoubtedly a big problem which I as designer/builder/sailor have or had. ;-) ... but much more bigger problem for a sailor is to buy such boat like CarbonBee, isn't it?