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

Описание: Welcome to the 16th of Season 2
It's all about where you put your probe.

This week we finally get to do a proper ultrasonic metal thickness test using the Olympus 38DL!
NDT or Non Destructive testing is a term which covers a number of methods of testing which do not cause damage to the thing which is being tested.
We have our own Ultrasonic Thickness Tester which is a Panametric DL25 but to use that we need to expose some metal and test by placing the probe directly in the exposed steel. The amazing thing about the DL38 is that it will read through paint and even through epoxy fairing to an extent.

But it only reads that exact spot so vital inspection of the steel is still a crucial part of the process.

We have now checked the entire hull, from a few inches above the waterline, right down to the underneath of the keel, and along the entire length of the hull using the DL38 and we're super happy.

We know the areas we need to focus on and having done this we are confident there are unlikely to be any major nasty surprises down the line.

We're still going to wet blast the entire hull from the waterline down later in the spring, but for that we need a few days good weather so we can treat and paint the metal straight away.

We're doing the major welding jobs first so the new and old steel will all get blasted to the same texture and "key" making for better paint coating adhesion globally.


We are Andy, Melissa and Jack, a sailing family based in North Wales, and for the past couple of years we have been looking for a bluewater sailing yacht to take us around the world.

Well we've finally found her. Our new sailing yacht is a John Teal designed 38ft Steel Pilothouse Cutter. She has been standing ashore for at least 15 years and now we're embarking on the huge challenge of refitting her and doing her up ready to go sailing around the world.

Follow along with our journey and help us with any advice and tips you have along the way.


Our equipment
Sony Alpha a6400 Mirrorless DSLR
FeiyuTech a1000 3-Axis Gimbal Stabilizer
GoPro Hero 7
GoPro Hero 3
Iphone 8s Plus
Samsung S20
DJI Mavic Air


Our links
Support is on Patreon :   / sailingmelody  
Check us out on Instagram :   / sailingmelody  
Come talk to us on facebook :   / melodysailing  

If you would like to make a regular contribution to help towards getting us started on our adventure you can use this link to go to Patreon

  / sailingmelody  

or make a one time contribution via PayPal using this link
paypal.me/sailingmelody

We would like to say a massive thank you for all your support so far!!

KO-FI is a website where you can support us buy buying us a "coffee" which would really help us out.
We would love if if you bought us a coffee or Jack and ice cream, click the link below :)
https://ko-fi.com/sailingmelody

We also have a wish;ist now on Amazon if you'd like to help us out that way......
https://www.amazon.co.uk/hz/wishlist/...

Other links to our contributors and friends

Great Dane 28 Website
http://gd28.wikidot.com
This is the official website for the Great Dane 28 owners. Here you can find the history of the GD28 and a full list of all the owners.

Dudley Dix
https://www.dixdesign.com
Legendary yacht designer Dudley Dix! Dudley is world famous for some of the best racing and cruising yachts ever seen.

Mylor Yacht Club
https://myloryachtclub.org.uk
Lovely people and a stunning place to have a mooring, or just a stop over. Mylor yacht club are very friendly and have all the resources and help you could wish for.

Lincoln Electric - Quite simply the best welding equipment money can buy. And if that wasn't enough, a super lovely and helpful company!
https://www.lincolnelectric.com/en-gb...