#30 - It's all about where you put your probe : Ultrasonic metal thickness testing

[@yellowstonenaturerc8518]

Your restoration videos are amazing. What strikes me as most important, and educational, is that your videos, unlike some others, are truly a "Family" project. Each member of your family share in the restoration, and that you always show Jack as an important part of the ongoing adventure. To 'Jack' I say 'high five kid' you are awesome! I can only imagine how proud your parents are of you. ... Your friend in Cody, Wyoming

[@SailingMelody]

Thank you so much for your lovely kind words. Jack is a massively important part of the team :)

[@langbangnz]

Probably the most positive and optimistic person I have ever seen, wish I was more like that! Good on you guys 👍

[@lydiaajohnson]

19:10: Boy and dog walking along. Beautiful. Glad you got that on video. You will absolutely cherish that 20 years from now. My little boy is grown now. Happy-sad. Actually, that whole video of the family together on a walk is superb.

[@SailingMelody]

Thanks Lydia! Always lovely lovely comments from one of our star supporters

[@keithfletcher5788]

Money well spent for a peace of mind.Stay safe.Best regards.

[@SailingMelody]

Absolutely!!!

[@maryjnorwood3962]

Truly loved the ending with the amazing scenery that surrounds you. Really enjoying your channel. Thank you!💕

[@SailingMelody]

Thank you that’s really lovely

[@TheDobby11]

Family project. Family time. You cannot put a price on it. Well done and keep up the good work. Dave in Canberra Australia.

[@jimmac521]

that's a nice bit of film work there at the end... well done.

[@SailingMelody]

Thank you 😊

[@PMMM9]

I’m so happy for you all. Having the reassurance of the ultrasound renews your confidence and confirms your intuition regarding your gem in the rough. As the weather improves, and the days hold more light, your enjoyment will allow tasks to tumble. Please make time for outings and walks together; Such a lovely family.

[@angeloys]

Great news. Must be really reassuring to know now. Keep safe and can’t wait for next episode.

[@clairepapadatos1116]

Absolutely brilliant, if not painstaking, work! So glad that the old girl hadn't any hidden nasty surprises! 👍 Beautiful footage at the end! Where are you? All love, and best wishes, Claire, Sally the older Goldie, and Lucy the cat, Berlin 😘 😘 😘 ✌ 👍

[@SailingMelody]

We are in North Wales in the Uk We live on the Llyn Peninsula near a village called Porth Dinllaen and the boat is a few miles up the road in Holyhead

[@clairepapadatos1116]

It looks absolutely gorgeous! Made me feel terribly homesick😢 One day.....! 😙😙😙

[@paulscott6463]

Good job you done there, and pretty much explained everything txt book good job. I forgot to tell you the biggest trade secret to UT inspection, a wall paper scraper, quick little tickle of the area before putting your gel on...lol, looks good, well done

[@SailingMelody]

Thanks for your help and advice Paul! Really invaluable and glad to know we went about it more or less the right way

[@johnbrown9438]

well done, guys great video again,love the little ship,very good find,roll on spring,missing wales keep up the good work,thank you.

[@almath9987]

Thanks, this will give you peace of mind👍🏻 To carry on the theme of the video title... guy in work went to site with a ultrasonic clamp on flow meter to do a test. When he started setting up he released the last person to use the meter had used all the coupling gel! After a 2 hour drive he wasn't going to give up so went do to the nearest supermarket and bought some KY jelly. Worked a treat and he got the job done however when he handed in his expenses the woman in accounts questioned him on his receipt for KY jelly so he had to explaine 😂 Gave us all a good laugh and he still get the odd dig about it😅👍🏻🏴󠁧󠁢󠁳󠁣󠁴󠁿⛵

[@SailingMelody]

Hahaha that’s so funny!

[@Kathleensailorgirl]

Looks like good news, definitely nice reassurance using the ultrasound. Stay safe ⛵️⛵️💕

[@jimmcdonald9244]

Splendid job Andy & Melissa, and of course Jack. I live in New South Wales, Australia. I've always wanted to know what the south Wales coast looks like. Thank you for the views.

[@SailingMelody]

We are on the north coast of Wales but I'm sure the south of Wales will be in an episode once we are in the water 😁😁

[@cornelisvanderbent2092]

You guys brighten my day every time.

[@SailingMelody]

Thank you so so much! And welcome Aboard ;)

[@lancedaniels]

Really good news from using the ultrasound. Nice to see a little more of the area around the marina.

[@SailingMelody]

Yeah we were very happy

[@MrELOIGOMES]

I liked the video, but I missed Captain Jack's always pleasant participation in this episode. Surely he'll be back more often soon, won't he? Go ahead and all the happiness in the world for the three of you!

[@SailingMelody]

Yes he loves to be involved and we love involving him but don’t want to pressure him to do to much

[@MrELOIGOMES]

@@SailingMelody Perfect! 👊🏼

[@trevhedges]

Very cool! No Surprises..

[@SailingMelody]

Indeed indeed! And hi there Trev! Must call you for a chat sometime soon

[@brianbevington8777]

that is very good news,..no surprises later on !!

[@Mylifelovingit]

Doing a repetitive job like that is not always fun but the peace of mind afterwards makes it all worth it

[@SailingMelody]

Yes it gets a bit tedious after a while that’s for sure

[@harrisonandrew]

The title made me laugh. One always have to be careful where one puts ones probe. You certainly don’t want to damage it or substrate. I applaud your care.

[@bobuncle8704]

That sure is a handy piece of kit. It’s really nice that you knew someone who had one that you could borrow. There are some cheap ones available, but it’s too important to use a cheap tool on a job like this.

[@SailingMelody]

Absolutely. Even the cheap ones are great though so long as you can expose the bare steel and read that

[@keithmabey4705]

Interesting! No doubt you are pleased, that the measurements support your original thoughts.

[@SailingMelody]

We certainly were! Still using our eyes to scrupulously examine every inch of the hull inside and out though as you’ll see in the next episode

[@ascot1049]

Brilliant .

[@mattthedog5738]

Well done guys. Always enjoy your channel content. Can’t wait for the hair cut 😉

[@SailingMelody]

😂

[@tejolisboa]

This is smart working!

[@SVImpavidus]

Exactly as you expected! Sail Safe Guys, Ant, Cid & the pooch crew.

[@SailingMelody]

Yes we are happy with that. Hope your all good 👍

[@JP-lz3vk]

Real "edge of ruler" excitement this week...

[@SailingMelody]

😂

[@russcollins4306]

Do you know the age of the Stone harbour wall ? Great news about the small percentage of steel in the Hull to be repaired. Thanks for sharing !!!

[@gutsanglory1]

Piece of mind.. that's the big thing. Nice to hear there was no crazy issues pop up. Cant wait to see your crazy welding skills! Do you have a lot of experience? Please be sure to include some details on steel qualities and types, and welding technics. I've done lots of welding in my past and know there's a tone of good subject matter on that topic. Nice to see the weather start to turn around :) Cheers all !!

[@paulbiezing2686]

Pretty sure many of us watchers are happy with the readings as it looked rough

[@SailingMelody]

Yes we’re getting so much positivity from you guys it’s lovely. But I agree she looks tougher than she is. There’s a long way to go yet snd lots of steel to cut out

[@bgt7874]

Good to see you know where you stand now knowing you have a solid base and can start renovating. Are you going to probe the steel of the deck/topsides as well and are you going to make a plan of when and how you are going to work on the different jobs/projects? Greets, Bas

[@SailingMelody]

Yes its a lot more comforting, no we are quite happy with the decks, but we do have our own thickness tester that doesn't read through paint that we can use if we see anything concerning! Yes we will probably do an update plan episode soon 😀

[@allanwood3562]

Oh boy the countless hours ultrasound I have done as part of my work. As a rough rule of thumb I gridded out at 100mm squares on the kind of surface you have. There's a lot of technique involved but for what it's worth using vet lubricant or, ahem, personal lubricant works well as a cheap couplant as are China graph pencils for marking up (or paint pens). Also as a rough idea 1mm of steel makes approx 10mm of rust.

[@miru71]

Someone wrote about welding a patch onto an existing sheet. This cannot be done. This is against yacht building regulations. One sheet may only overlap the other a little. There is a suitable formula for this. L = 1,5g + 1,5 [mm] L-overlap width of two plates g = thickness of the repair sheet. In the fall, I removed the mooring poles from the deck, which were welded to the sheet. There was a lot of rust underneath. You said you want to sandblast everything after welding - and you do! But ... if you can rent a sandblaster for a day, sand the spots you will weld. Only then repair the plating and sand the entire hull at the end. There is one drawback to cleaning the repair site with an angle grinder. When grinding, the tiny spots of rust can be covered with healthy metal. Yes - steel is malleable. :-)

[@SailingMelody]

Yes absolutely! And don’t worry we won’t be overplating anything! The idea makes my skin crawl! I used to fix up cars and back in the 80’s there was a fashion for welding floor pans and sills into car bodies by overplating the panels and it used to drive me crazy the number of times I’d cut out a rotten floor pan in someone’s car to find the remnants of the previous floor pan underneath it....... and they wondered why the new one only lasted a couple of years before that rotted through 🤦‍♂️ We can’t rent a sandblasted as all sandblasting work in this yard has to be done by the yard not by ourselves or anyone else but hey Ho, their yard their rules

[@andrebelanger7798]

Very interesting your video Andy, When you walked with your family you passed near a fortress. What year is she from. She doesn't look very young

[@justinfufun5483]

Riveting stuff. At least not boring to find out the depth and condition of your hull must be. Sweet to find out the sugar scoop is lightweight. Enough puns for one episode. I would have gone the hole hog (sorry) and used my knuckle to tap my way along the hull and go " ah sure its grand. Delighted for you. Bet you had a great night's sleep after that one.

[@SailingMelody]

😂 We certainly felt alot happier

[@lydiaajohnson]

Fantastic news about the hull thickness. I doubt the steel is as thick as the readings on the blue boot strap line. Wonder why the blue paint consistently shows higher readings.

[@nilslundqvist34]

Amazing as always! But can you estimate when you will be able to launch the boat?

[@delukxy]

The rusty steel boat moored up in the harbour could be your non identical twin! Does look rather similar. Been there a while by the look of it too. Top work with the ultrasound. You could have just added a dab to the probe perhaps rather than the hull?

[@SailingMelody]

We tried various methods lol. And yes we were offered and considered the big steel floating yacht but it’s 60ft and would have crippled us physically and financially I think

[@chaosandcarnage1]

Don’t forget that something as simple as the paint thickness can give a small change in the reading. Glad to see it’s not so bad after all. Lol

[@SailingMelody]

That machine tells us the overall thickness, the steel thickness and the paint thickness separately, it’s a very fancy expensive machine

[@jimalexander1896]

How thick is 4mm?...in inches?.....or gage?....I am am a welder but never done a lot of sheet steel!...sounds like your on the right track! Cheers

[@SailingMelody]

It’s 5/32”

[@MrMarv75]

Who is the 🔔 end that's pressed dislike on this vid ? 👊

[@Cortez-rx7vj]

I agree. There must be people who go through life pressing the dislike button on everything for this video to get a thumbs down. I'm looking for a boat myself and had always discounted steel over fiberglass as an option but this channel is definitely changing my perspective.....

[@JP-lz3vk]

@@Cortez-rx7vj This has confirmed my suspicion about steel - yes it will protect you from rogue vessels crashing into you but Melody will struggle to go upwind under sail.

[@dalewatson7982]

@@JP-lz3vk yes it will, I had a steel 45ft ketch closest I could get was 45deg, had to motor sail most of the time. Still loved it though. Good luck.

[@JP-lz3vk]

@@dalewatson7982 I have to think "what is the point of having sails?" if you have to use the motor most of the time and fuel is expensive...

[@dalewatson7982]

@@JP-lz3vk Jusy To move our boat we required around 10 nots of wind,didn't fancy that,so just a tick over of the donk gave us a couple more nots. You get used to the engine noise. Never bothered us.

[@jfarmer1711]

The lost of 0.1mm along the chimes is probably from where they were ground fair during construction.

[@SailingMelody]

Yeah! In the majority of places it hasn't lost anything so we are happy with that 😁

[@seawolfburak]

Could you please advise your device name model and do you think that it can be used for aluminum hull? Thanks in advance!

[@motorboatselmaiii109]

While it's fine to measure the general thickness of the hull all around as you have done, it doesn't really give you the real image of the hidden flaws of the hull. The danger lies in the small corroded spots, and the way to measure them is to grind them with an angle grinder until you reach the bottom of all the small pits of rust, and then measure the thickness. That will tell you the real thickness. You also have to inspect the inside of the hull in order to find the spots where it has rusted from the inside, and then measure from the outside in those places. I used to do this kind of work when I was young, so I know what I'm talking about.

[@SailingMelody]

Totally agree hence the name of the video, we also say that only tells us the areas where have measured. We are exposing and inspecting the internal steel. We also have our own thickness tester which doesn't read through paint so if there are areas that are concerning we can take of the paint and test 😁

[@fireantsarestrange]

I would agree.. but id still just hit it with a stick. haha

[@motorboatselmaiii109]

@@SailingMelody It's nice to have a thickness tester at hand, it makes it a lot easier to do it right :-) After all, the real thickness is the thickness at the bottom of the deepest pit - I have seen small rust spots on 8 mm steel plate where the thickness in the deepest rust pit was only 1 mm. But as long as you can access it from the inside, it's no big deal to replace a few pieces of steel plate in a boat like yours. I don't know how much experience you have in working with steel hulls, but if you don't already know it, here is a couple of safety ground rules: It's important to make the corners round (>= r30) when you cut holes in the middle of a steel plate. This is to avoid cracks forming from the sharp corners. Sharp corners can be used when the cut starts from a seam. It will be a fine boat when you are done with it :-)

[@sheilamrum8132]

ITS gonna be a Beautiful boat 🙂🙂🙂🙂😎😎😎😎😍😍😍😍

[@MrToyorick]

Are you in contact with the guys with the channel # Ship Happens ? the are looking for a ship yard for their big wooden boat 😁 i think you are in the same region....

[@SailingMelody]

We are yes. Holyhead is a bit too far for them I think

[@anthonybeck2384]

👍👏🏻👍👏🏻

[@pagegreer5081]

So when its blasted are going to do 1 side at a time. Then prime and refare. Or all at one then try to get it done?

[@SailingMelody]

We will probably have to do it all at once. 😅

[@paloureiro]

Perhaps, I'd use more ultrasound gel. Maybe it's the reason for the disparate readings

[@SailingMelody]

Quite possibly, it reads through paint but I think the fairing in places is too thick to read through.

[@paloureiro]

Does it have an image or only a numerical reading?

[@SailingMelody]

The one we were using in this video shows both and it shows the paint thickness too.

[@paloureiro]

When there is air between the probe and the material you are scanning, the images will be defficult to obtain. If the image was good, you can double check the displayed thickness value. Maybe where there is epoxy there are trapped air bubbles that prevent the US penetration.

[@SailingMelody]

Thanks for that we will do some more tests, we have it for another week 😀

[@pagegreer5081]

Do know your sheet steel thickness at build time. Pad welding we be in your future.

[@SailingMelody]

The hull is built in 4mm and the decks 3mm, inside the keel box is 6mm

[@howardbeer5214]

Just make sure you use blasted-primed sheet plate marine grade to weld in or if you use just plain steel plate it will corrode like hell from the inside out just as that has YOU MUST USE BLASTED PRIMED PLATE !!!

[@SailingMelody]

Sadly we can’t get it round here. But I’ve got an excellent, friendly and well informed steel supplier who is being super informative and helpful

[@howardbeer5214]

@@SailingMelody Try and find a good steel supplier and am sure they will be able to get it for you Blasted and primed with low burn epoxy

[@bryonensminger7462]

Depending on the ink it could very easily bleed through the paint

[@SailingMelody]

Good point I’ll be sanding it off though. I’ll be sanding right through the top coat back to the original primer

[@si_vis_amari_ama]

@15:24. It appears you've lost a stringer through the hole ;-)

[@John-ps7mk]

no bad news is great news. the steel hull will keep you safe in case (I hope not) run into a floating cargo container.

[@JonMadsen70]

:)

[@fireantsarestrange]

Lol... i'd just knock on it with a stick and listen for it. There is a lot to be said for good old senses. I can tell if that 1/4" steel is gone.

[@SailingMelody]

Eyes and ears and touch are often the best tools we have. As a paramedic I have a saying “Look at the patient not the monitor” it’s easy to get distracted by a reading on a machine which says something which is in opposition to how the patient actually looks. I can a lot from initial visual observations of the patients position, muscle tone, skin colour and then a quick check of the patients wrist will tell me about their heart rate and skin temperature and watching them speak to me will tell me about their respiratory rate, rhythm, volume and effort before I’ve attached a single piece of equipment to measure anything. So I have a pretty good idea of what numbers I’m expecting from the monitor equipment and that means I don’t tend to panic when I see a weird looking set of numbers.

[@jakeoddmonic2956]

Heheheheheheh

[@harveypost7799]

Huh?

[@SailingMelody]

?

[@fireantsarestrange]

You can just see it man. It's not that hard... I would be looking more or less on the inside because that is where the problem is. The bilge is probably the worst of it.

[@davemoulding8799]

You need a hair cut bad

[@SailingMelody]

Nah 😂😂 I’m going for the long haired windswept and interesting look (quote from Billy Connelly)