CATAMARAN BUILD - Reinforcing Our Cockpit Bulkhead (MJ Sailing - Ep 196)

[@patraic5241]

A trick I've used with fiberglass. Keep a pushpin at hand. One that you can get three fingers on. If you get a bubble that won't go away take the tack and prick a tiny hole in the middle. This creates just enough of a channel for the air to escape. The resin will fill the hole and you will never know it was there.

[@MJSailing]

Hmmmm, I hadn't thought of something like that before. - Jessica

[@maxsteel6092]

I am so pleased the puppies came out to play.

[@nathanchalecki4842]

I'm still waiting to be honest.

[@d.w.103]

Best Episode EVER!

[@maxsteel6092]

@@d.w.103 When they introduce the CAT series is my top!

[@SoItGoesCAL34]

Really liked your graphics of the blueprints with your animated arrows. Good job. Thanks for sharing. We're not Patreons but do watch most of your ads to help out in a way that we can. Stay safe!

[@joshuagoodstein2031]

WOOHOO I made the wall

[@SergeAdam]

Merci!

[@chipbhi]

My wife and I were just sailing out of Annapolis with friends. We were tempted to come bring you some beers, but we didn't want to invade your privacy. Thank you for sharing your lives with us!

[@miltonmiller]

This channel is so interesting! I can't stop watching it.

[@TheAtma50]

Welcome to my world !!

[@ChloeKinzLax15]

You guys are doing a great job. I can’t imagine the factories put in the same attention to detail. Can’t wait to see it finished.

[@glennedwards1449]

I think it is with anything made. Obviously if you are doing it for yourself you are going to expend more time and effort. The flip side of this is that if you are in a production environment it is a job you may of done hundreds of times therefore do not need to put in that much effort.

[@chrisblore6385]

You both are amazing with your ability’s. Keep up the great work..

[@JakobEngl]

Amazing video !

[@CessnaPilot99]

I really liked the blueprint drawing you showed at the beginning. That was extremely helpful to get an idea of what was actually happening. Please do that a lot more often! even if you don't use the arrows which I imagine takes a little time to edit in. Thanks so much for what you are doing, keep up the great work..you two are awesome.

[@BeenThrDunThat]

I thought that was great as well, knowing you can't show us too much since it's proprietary and all. I wondered though, the order that each type of cloth was laid down. Is that spelled out in the plans? Or does the order even matter which is first?

[@sailingcitrinesunset4065]

You need to put in a fillet of thickened epoxy where the foam layers are different levels. That's why the fibreglass didnt stick in the area.

[@carbidegrd1]

Working on some fiberglass aircraft panels many moons ago. We were told that the fiberglass had to be kept in a dry box. Humid air deposits water on/in the strands, the teacher proved it by wrapping a cut piece that had sat out in saran wrap and placing it in the sun. Sure enough the plastic wrap was covered in moisture an hour later. That means that left unchecked, a layer of moisture interferes with a proper bond.

[@s.v.gadder1443]

When you're using polyester or vinylester it's not as big of a deal as they both have a solvent in them that absorbs and removes moisture, with epoxy it is a bigger deal, as epoxy doesn't have any solvents in it.

[@richcastellano4883]

You two are doing an amazing job. After watching Parlay Revival’s issues with his Lagoon 45 bulkhead cracking I have a greater appreciation for how critical your bulkhead work is. Since your stuck working nights if you want to get out sailing let me know. I’m docked directly across the bay on the south river.

[@bake162]

Always a treat watching you 2 build this boat

[@MJSailing]

Thank you so much for following! 😃

[@soulcontractor1641]

It must Give you Great Comfort in Knowing that you Over Engineered the Heck out of your Catamaran!! I can't Wait to See you Guy's Sail it!! Dean ( Soul) Toronto

[@pavichapin]

@@ralphgesler5110 See Zingaro bulkhead failure for under engineered

[@mattgerlach6688]

@@ralphgesler5110 just an unknown failure mode, or un-anticipated load.

[@10bbremer]

Man! I am exhausted after watching all that work!

[@jedi201]

You guys are going great. Awesome work. Jess you look tired. Breaks are good, recharge!!

[@roryderbyshire4630]

Awesome job I can't wait to see it finished. Cheers Rory

[@cozydram1]

Your hard work is defiantly paying off Well done

[@Tim8mit]

good to see you taking a small break....so good for the soul

[@MJSailing]

And such a great place to take a break! 😍

[@GR-yf1cm]

Can't imagine the satisfaction you are going to have when you look back at what you have built . Great to also see the enthusiasm is still high keep up the good work 👍

[@robertlaird6746]

I love your channel! Awesome build!

[@bkackman]

After watching how hard you two continuously work on this project without (significant) complaints, it makes any challenging projects I've had lately insignificant. In essence, you two are a never-ending inspiration. Cheers to you both.

[@JMinTexas]

Best video since the May 30, 2021 masterpiece !!! Keep up the great work, can't believe you can stand that heat!

[@10lauset]

Cheers.

[@notwhatiwasraised2b]

the story telling and character development is improving Keeping talking to each other by name

[@petetjaarda5112]

Looking good & making great progress. 👍😎👍💕

[@garyfroeschner2523]

Good stuff

[@davidmacbeth5575]

I built a 40' cat in a similar fabric shelter in tropical Cairns. During summer, in the shelter 34C was considered cool. It would pass by 34C by about 9am and stay that way till after dark. I downed tools when it got to 45C but is was consistently 38C-40C most days. Outside temperature would hover around 32C. Hottest I saw on top of the roof was 55.6C with 64% humidity...talk about post curing your glass layup. It does take a lot of planning and weather watching if you had a large layup to do. You do seem to have a very good light setup over your work area which helps with working at night time - something I didn't have but wish I did.

[@petergroves9343]

Fantastic job, thanks for showing the diagrams, helps me to understand the area where you're working Keep up the great work ⛵️⛵️🍻🍻🍻🍻

[@ThoughtfulWander]

Looking good progress is always a good thing! Keep rolling!

[@TheAtma50]

Jessica what were you saying ... I was distracted ! Stay Safe & Fair Winds !!

[@amarieshearer7613]

It’s coming together

[@cinderswolfhound6874]

Nice to see everyone on the evening cruse wearing life jackets

[@AustinBoil]

Did you consider vacuum bagging/resin infusion? It in the end provides an overall stronger product and virtually eliminates any air pockets as well as a ton of manual labor trying to get them out.

[@onelayt]

Ultimate catamaran builder .. 👍👍👍

[@guydepoorter]

Collin Lagoon bulkheads story are changing the sailing world. Good work.

[@MJSailing]

These have been the designer's plans from the get-go, it has nothing to do with recent Lagoon issues. 😉 - Jessica

[@JCrook1028]

Sigh, so sick of these lagoon comments on every sailing channel on every topic.

[@michaellukaniuk5074]

You are both doing an amazing job. This will be one kick-ass vessel when completed. I always found with rollers no matter what product is being worked with an extension screwed into the handle took a lot of strain off the wrists and allowed more pressure to be applied.

[@ronsutterfield8430]

sure like your catamaran build videos

[@markjennings2315]

This should have been sponsored by Lagoon design offices! They have paradoxically improved Bulkhead design and strength awareness for all CAT owners

[@MrRourk]

Wood Wind II is so gorgeous

[@MJSailing]

Agreed! We feel so fortunate to have been able to sail on her.

[@michaelhaardt5988]

The blueprint illustrates the forces very well. Thanks for showing it, in particular because Maxcruise has no reason to hide anything! The location of the unidirectional speaks books on what a square cut causes and that the naval architect is aware of it. A not to be named french builder instead placed a conduit in that area - just crazy.

[@The1stKukuDrifter]

Thank you both for being so patient with all the questions. You’re doing something so many of us dream of and many of us want to learn with you. I’m curious, besides the cost of the resin is there a danger with being to liberal with the resin? How do you know when enough is enough or if it is too much? Awesome to see the progress, thanks for taking us all along for the ride.

[@karlfair]

Nice work this week. The Wood Wind II section was good, even with the audio issues.

[@mkllove]

Hey Jessica ! With all those donors names preserved in glass, had you considered making several T shirts of the different wall sections once the area is "filled" completely ? I would bet that those people would like a T Shirt for posterity... and would buy them as continued support of the boat.... maybe as an item for the launch party included with a ticket price ?

[@bertfromnz9069]

Nice dress!!!!

[@bobstienke178]

I’m glad you’re beefing up your bulkheads, seeing the issues of cracking/separating bulkheads on the Lagoon 450. I know they are different designs, but similar stresses affect both boat types.

[@peetky8645]

those lagoons look janky

[@patraic5241]

I expect that Lagoon is kicking themselves right now for Not paying more attention to bulkhead strength and durability not to mention proper instillation.

[@nena4215]

That zero 90 gives a whole new meaning to chasing air bubbles....screen is a great analogy for that! Dang, that was sure tuff and Matt, you’re looking skinny these days...... maybe more ice cream for you! Thanks so much for the wonderful episode

[@thomasw5430]

It’s really coming together. It’s really starting to look like a cat! I guess there wil be more night work once August hits. Hopefully a quiet hurricane season here on the east coast.

[@extremelydave]

Who needs a gym? You're building a boat!!! Wow, that baby is one heck of a lot of work, but when you're done and out playing in the blue water, it will be worth it.... and at the very end of it all, when you decide to move to another boat, all that sweat equity will pay for itself!!

[@Mister510]

Is everyone else sick of all the stupid comments (on nearly every sailing channel) about Lagoon 450s? Trust me, EVERYONE knows about them and their bulkhead problems by now. Lagoons are poorly built production boats with glued-in single layer plywood bulkheads. These are fiberglass reinforced, foam core bulkheads that are fully glassed into everything they touch. This boat will never have bulkhead problems!

[@MJSailing]

Part of me wants to pin this comment to the top, lol. - Jessica

[@netpackrat]

@@MJSailing Explaining the differences in construction methods in the videos hasn't helped; I doubt if any number of pinned comments would either.

[@s.v.gadder1443]

Agreed..... lol

[@Mister510]

@@MJSailing Do it Jessica! :)

[@russellesimonetta3835]

This build is epic. Great job! Life on the icky sticky!

[@Bradley_Clark]

thumbed

[@ronaldsmeaton1432]

You appear to be getting a fair bit done in a short time I don’t know if you have watched parley revival and there bulkhead problems on a lagoon four fifty but I’m living in hope you guys are making everything as strong as is possible keep safe and all the best with the build

[@peetky8645]

looks to me like the 0-90 doesn't "hold air". rather it is very stiff, so when it rebounds, it sucks air back in from the edges. re: the air voids left around corners that you say you will sand out...could you use a syringe and needle to poke a hole at one end and then inject epoxy from the other end. this would preserve the integrity of the fiberglass sheet while removing the void that allows separation/buckling under stress. also might be quicker and less messy than sanding.

[@harveynailbanger]

Looks like a great time on woodwind II, The wife and I did a trip with friends last weekend for his birthday on the alyosha, a 50' cat out of Ocean City ,Md. Check them out if you get the chance. Capt Steve Butz and his daughter Sarah did a great job. My first time on a non hobie cat cat lol. If that was any indication , your project is going to be a lot of fun.

[@stevegem4155]

Hey Matt when it comes to your 090 try pouring the resin right down the middle of the cloth and use your squeegee to move it around, as opposed to using a roller to apply it. I think with the larger quantity of resin filling the weave you'll get quicker saturation, and the access resin will be soaked up by the next layer of glass or the peel ply.

[@RESET1776]

Keep up the great work!

[@Arnaud58]

It is obvious that the strength of the bulk heads is very important. There's no such thing as too strong here, just ask Parlay Revival... Good job you two! Oof, 94°F surely is not a good temperature to be cutting fibreglass. But well, what can you do?

[@AliasJimWirth]

I am curious as to whether or not you have used the technique of daubing the areas having bubbles with the bristles of a painter's brush, followed again by a roller? I have not worked with fiberglass in many many years now, but we used to employ that technique back then and it always worked; it was regular practice for us. Maybe archaic in modern times. Just wondering. Love the progress, but also the fact you take some breaks now and then.

[@BobEstler]

If those are typical rollers you can screw and extension into them. A 18 inch extension should give you 1) More Leverage and 2) more reach. Both of those things will reduce the amount of effort required.

[@davemoulding8799]

Some of those air bubbles are due to not enough resin on glass

[@JCrook1028]

They do tend to work really dry it seems.

[@NoseyLurker]

Agreed... I have seen others soak their glass in resin before laying it down and rolling it out. Seems like they would save a lot of time and back pain by just using a little more resin and not having to work out the bubbles as much.

[@s.v.gadder1443]

@@NoseyLurker kicking themselves for trying to save a few hundred bucks in wood on million dollar boats...

[@kevonmason6140]

I built my Grainger Trimaran by myself and understand some of the problems you point out. For those area where the glass has to dip down onto a lower level panel, I suggest you make larger radius fillets for the glass to lay around. This should reduce those areas where the glass will stubbornly sit up allowing air to remain underneath.

[@kevonmason6140]

One other price of advice is not to over roll the fibre glass or you will break many of those glass fibres, therefore weakening your fibreglass work.

[@serg_she]

Как выросло количество подписчиков с начала проекта👍

[@nickcooper14]

Great haul guys, I guess you have to do both sides the same? Eat, sleep, repeat🤙🏼🤙🏼🤙🏼🇦🇺

[@MJSailing]

Yes, in next week's episode you'll see us work on the side with gelcoat. 🙂

[@handaferguson]

Great Job!!! Thank You... :-)

[@gerryscott876]

I don't think it would save you much if any time but vacuum bagging your parts would give you a more consistently wetted out and solid layup, no voids or dry spots.

[@georgejordaan1951]

Excellent job. Try a product called Bubble Buster to roll out the air bubbles. I have used it with great results. Cheers

[@s.v.gadder1443]

Well if they were using epoxy id say add 10% acetone but idk about what you'd think that with .... but thinking the resin helps a lot with bubbles

[@georgejordaan1951]

@@s.v.gadder1443 i would not dilute with acetone as it breaks down the vynilester material.

[@MJSailing]

I think we do actually have a Bubble Buster - hidden away somewhere among all our supplies, lol.

[@hanssolo4ever]

Hopefully those eight layers around the narrow parts of the bulkhead will be strong enough and the bulkhead won't crack. The break you had with the sailing of Woodwind was really nice , you deserved it. It looks really good so far. What is the brand and model of that electric sizzor?

[@AussieSlangkanga]

If you had the chance to do it again to the bulkheads, would you consider vacuum sealing them, as it’s a smaller area to handle?

[@my31and37]

Glad to see beefy bulkheads!...you sure don't want the problems that Parlay Revival and others are having with a certain Cat.

[@matthewkjellerson9325]

it's about as exciting as watching resin dry........

[@stevegem4155]

Resin cures ,it doesn't dry.

[@MJSailing]

👍😂@Steve Gem

[@matthewkjellerson9325]

@@stevegem4155 so it stays wet......as it never dries

[@gman1003]

Lagoon engineers are watching intently......

[@jaycroyle8761]

I have been following along on this build, I can't imaging the amount of man hours necessary to complete this project, and I just have to wonder if the factory takes the same attention to detail as you guys are taking. It's so interesting. Do you have a projected completion date? This sailboat is going to be amazing.

[@johncollins5021]

Pain killer's are good. One two or three. What did you have.

[@MJSailing]

Just one, since we then hopped on Woodwind and had about 3 craft beers. 😉

[@jeffreynerdin3522]

I wish I could get into fiberglass assembly, but it all just seems like the same thing over and over. I can’t wait until you get to finishing the interior and doing the rigging. Good luck getting there.

[@MJSailing]

Are you sure you don't want to stick around for the ultra interesting phase of fairing? 😜

[@MJSailing]

Oh, but I will say that Episodes 198 & 199 have nothing to do with glassing and will have some content you may find more interesting. 😊

[@jeffreynerdin3522]

I’ll look forward to them. Thanks.

[@nathanielzervos1265]

The 0 90 fiberglass just needs more resin

[@tomatobrush3283]

Can see why Lagoon skipped this part, very labour intensive. Do they make longer rollers, might speed it up?

[@peetky8645]

i bet the rollers they are using are ideal for a humans weight. you need a small surface contact area to create enough pressure to move the glue through the mat. if you doubled the roller length, you would halve the pressure at the surface. a bigger foot long roller probably would likely give insufficient pressure.

[@s.v.gadder1443]

If you watch "life on the hulls" spraying is really best when your building large builds.....

[@tomatobrush3283]

@@s.v.gadder1443 I have seen Bryan Sailing pour the epoxy stuff they use on the fiber class on to the area and then spread it out afterwards. Not seen anyone spray it on yet but that seems logical. Bare foot sailing also did a lot of fiber glass work and he uses his hands to spread it on first as well.

[@zihnigurdereli]

💖

[@bigbpdx]

Have you considered adding a layer of Kevlar to really boost the strength in critical zones?

[@bubbleobill267]

Best thing about working at night is no interruptions!. Are you guys logging all of your hours?, it’s a habit I got into years ago when doing boat projects. The end numbers are mind boggling to say the least!.

[@MJSailing]

We thought we would at the beginning of the build - but with living on site, it makes it extremely difficult for us. We're in and out of that tent about 6 times a day because of our odd work schedule, so it would make it very hard to get accurate work hours. 😉

[@MJSailing]

But we can say that 'on average' we're logging about 7 hours of work a day, 7 days a week.

[@bubbleobill267]

@@MJSailing Nice one, almost a hundred people hours per week. You’ll be finished before you know it ( mwaaa waa waa ) You’re doing an awesome job!.

[@NemecJesse]

Have you been following the bulkhead issues from Parlay Revival in their Lagoon 450? It would make me think about beefing up the main bulkheads with even a couple extra layers and extra tabbing now vs cracked bulkheads later. Just food for thought.

[@fairwinds9630]

it appears that many viewers are following the parlay revival but do not understand the difference between ply wood single skin and purpose built composite laminates

[@aa91504]

🤙

[@mikeallensonntag]

How close are you guys to norfolk/Virginia beach? I never realized you guys are pretty close to me till Watching this video.

[@kevinhaney9256]

Cool. You have two people building the boat, how many people does the Mfg use to build the same boat?

[@raymondnybakk1311]

You should try the other kind of metal rollers, with the fins gong the other way. I think the do a better job of pushing the air out.

[@jlsinchina]

Great work. You guys will be glass and resin experts. Sorry I missed what the peel ply does?

[@MJSailing]

Peel Ply compacts the fiberglass down and also sucks up excess resin. It also creates a good bonding surface for the next lamination. 🙂

[@jlsinchina]

@@MJSailing thanks keep up the good work!

[@johntripp2028]

Where you put down three layers why not let each layer extend a little past the one before. Or a little less so that it would be less of the hard step at the end of those layers. That way you don't create a stress point. Plus it will be a more gradual slope. I have no idea if you have to fair this area later so I won't mention that.

[@fairwinds9630]

the out board layers meet the hull where there are multiple UD and Biaxial layers spreading load from chain plates, the bottom of the bulkhead layers are met with a UD Box and UD plate the inboard edge is linked by a UD box, stepping the layers in this instance would lead to a weak seam line,

[@peterhoutkamp5581]

love the build but your not using enough resin ,thats how you can get air bubbles 🤠

[@davep1445]

Matt, you motorboating son of a b#*ch! Sorry, I couldn't resist. ;-) Love the channel, so glad to see you working on your dream.

[@roshenk]

just a tip. try laying a moderate layer of resin first before laying the 0/90 then over with a thin layer on top

[@MJSailing]

You'll see at 06:14; 16:13, and 19:25, that we do this step. 😉

[@roderickmarruffo7600]

Ok I gotta ask "Do you roll in your sleep...? Lol so much time using the rollers, even I got tired...

[@andre-louw]

Why don't you wet out the reverse side of the glass while it is folded back, then apply and consolidate the glass with the roller.

[@duartemonteiro7463]

😊💪💪💪

[@Naturalook]

You often mention temp… and that always makes me wonder, “Humidity?”

[@MJSailing]

Humidity here has been very strange. It sits around 50-70% in the day, and then at night when it cools down and we want to do bonding ..... it jumps up to 90%! 🙍

[@s.v.gadder1443]

Thats because of the dew point..

[@Naturalook]

@@s.v.gadder1443 … Adiabatics… PV=NrT

[@rboston33]

The occasional breaks are important. One thing I noticed was the height of your work surface seemed a bit low which required bending over more - harder on the back.

[@maxprea5331]

To dry and do one layer at a time and remove the airbubbels at every layer.

[@johnmayer3433]

Why not use the cut out pieces to fortify the door frame ?

[@stevenlancaster5537]

Do you have an update on when the next container will arrive?

[@MJSailing]

Yes, on July 08, 2021 😉

[@muchmuchmore]

Do you need to check the temperature of the *materials* themselves to ensure they are not too warm for fiberglassing?