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Deri Jones

@derijones

Engineer/surveyor and hillbilly. Designer of giant Airfix kits for boatbuilding and 3D laser scanner of everything from aircraft to theatres.

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30.10.2023
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Latest posts by Deri Jones @derijones

Amphibious mussel harvester

Amphibious mussel harvester

It's OK, the French and Irish are on it - scale this up a bit and problem solved - in the meantime, they can put all that earthmoving gear lying round after the NEOM Line project folded to good use digging a canal. How hard can it be?

12.03.2026 10:13 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Yup - we got 80mm woodfibre/lime plaster on where the walls were flat enough and then used hemplime on the rest where we had a lot of unevenness - there's about 150mm difference between the top and the bottom of the wall in places, sculpted to a nice curve using the lime!

11.03.2026 09:24 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Good to hear, makes total sense to my engineering head and so much more efficient than what I saw on our refit, which sometimes drove me nuts! Accurate survey is key, but no real excuses on that with modern scanners and pointcloud integration to CAD software.

11.03.2026 09:18 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I had a snort from both the architect and builders when I suggested it, but having spent 20 years scanning and designing assembly kits for curvy fishing boats, where you're working to smaller tolerances, it looked fairly reasonable to me, even with a wonky old Welsh cottage.

11.03.2026 08:58 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Have you done any work using these for retrofit? Laserscan - build in some fitting tolerance, pre build panels (roof panels as well?) in parallel with the strip out work. Having seen how much work went in to our roof, this method has got to save time and result in a more efficient structure?

11.03.2026 08:58 πŸ‘ 1 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0

Jan & Twm Morris/Morys' vision in the Machynlleth Triad always sounded pretty good to me, though you still end up with the issue of who gets to do the choosing - only the gorsedd choosing? Eh, no thanks!

10.03.2026 13:33 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Why is it called "hallucinate" and not "fucking up" - if I misread a drawing and put in some 65mm angle rather than 65mm flat bar, then I haven't hallucinated, I've plain made a mistake and fucked up, with the attendant consequences. If an AI is going to replace me, I want it held to the same level.

10.03.2026 09:28 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Preview
630K views Β· 6.3K reactions | kiteskiing alongside a cargo ship and an icebreaker! Day #14 and the expedition to ski the whole west coast of Finland from south to north is past its midpoint, approx 36... kiteskiing alongside a cargo ship and an icebreaker! Day #14 and the expedition to ski the whole west coast of Finland from south to north is past its midpoint, approx 360km out of 700 km done!

They're still at it: www.facebook.com/reel/4418727...

09.03.2026 19:55 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

SRF bi de lΓΌt yn y Swisdir -S4C yr 90'au, efo eira! Ads am tractors, Noson Lawen (oompah bands golew!), Sion a Shan a Dai Jones yr Swisdir, Nik Hartmann.

08.03.2026 21:51 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Unless you're not paying attention, reset all the clocks in the house and only then wonder why the phone hadn't updated.... Twpsyn!

08.03.2026 19:09 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Ha ha! "Don't weld the rudder brackets..." sounds like a song that @dreadships.bsky.social would be eminently qualified to write the lyrics for.

06.03.2026 21:42 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Juxtaposition of two posts with dog looking at cat and a completely different cat (presumably!) poking their tongue out.

Juxtaposition of two posts with dog looking at cat and a completely different cat (presumably!) poking their tongue out.

The perfect juxtaposition of posts! @alexvont.bsky.social

02.03.2026 08:42 πŸ‘ 63 πŸ” 9 πŸ’¬ 0 πŸ“Œ 0

They didn't find bits of boat in the bottom of the hole where they came from? Lovely ballast and presumably the easiest way to move that sort of weight around. I wonder what that area would have looked like prior to drainage of Cors Fochno - a nice little pool close in to the higher ground?

26.02.2026 11:39 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Yup, warm sunny D that had been in the sun all day, a Primula and salami tortilla that had been quietly cooking wrapped in tinfoil and stuffed inside a climbing helmet, best food on Earth. Not sure how I didn't die of food poisoning, right enough!

24.02.2026 17:23 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

You need some proper American 90's Sunny D to go with that, the UK version of Sunny D was a right disappointment.

24.02.2026 17:07 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

The kids are OK! I've just talked for 40min on marine engineering to 70 odd 12-13 year olds. Heaps of great questions, from climate change, through renewable energy, RRS David Attenborough and Alvin the sub to how fishing boats are paid for and where the Pitcairn islands are.

24.02.2026 16:28 πŸ‘ 4 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I'm doing a talk to 60 odd 12 year olds on Marine engineering this afternoon. Don't think I'll be using this as a selling point! If there was ever a picture that smelt, this is it, having started in the sewage dept, poor techs.

24.02.2026 07:16 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Best time of the year to visit! I've been working with the boatbuilders there for 27 years and still never made it to the abbey - your photo's make me realise that I need to make time, rather than dashing off to the next job. Safe travels.

23.02.2026 07:19 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Well done - I completely re designed our bathroom to fit a bath I could lie down in (including fitting new steel joists to hold it up), then I've used it once, as we also fitted a decent shower, which was a bit of a revelation.

18.02.2026 17:19 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
False colour image of the floor showing relative heights to a level plane.

False colour image of the floor showing relative heights to a level plane.

A blast from the past - I surveyed the interior for EH back in 2007/08 looking at structural movement using a laser scanner. There are some great B&W photos from when the floor was excavated (80/90's?)showing older structure, presumably in the EH archives?

12.02.2026 08:23 πŸ‘ 4 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0

Small world! Ffestiniog travel used to be based in the office downstairs from mine. The lady that ran it had some hilarious stories of rescuing retired trainspotters that inevitably missed their connections after being distracted by rare loco's in random bits of Europe.

11.02.2026 20:47 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Can't help you there sorry- 10mm thick Lloyds grade A steel may be a bit of overkill. I can imagine nib engineering is a whole world of black arts with pliability, ink flow, temperature and all sorts coming in to play.

11.02.2026 15:13 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

@happybusman.bsky.social This you?

11.02.2026 14:38 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Moon (2009 film) - Wikipedia

Look at you with your fancy orbital mechanics, poking holes in his dreams, you're such a downer maan... I'd be watching Moon as an induction if I was working for SpaceX/AI as I guess he's been taking notes en.wikipedia.org/wiki/Moon_(2...

11.02.2026 14:11 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Do we know the name of the Plaid candidate, not Kenny by any chance?

11.02.2026 09:38 πŸ‘ 3 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Yup, I know exactly what the weather's doing in Leeds. Wondered why I was getting French Google results until I twigged I hadn't switched the laptop VPN off and it decides the French server is the fastest.

05.02.2026 15:36 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Normal day in Wales then...

02.02.2026 18:05 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Accident Investigation reports make grim, but fascinating reading. I've read the reports on boats I've worked on that have sunk and the snowball effect of small things amalgamating, where no single decision/failure led to failure really hits home.

02.02.2026 09:14 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Engineers, telling users and management "This is a really bad idea, don't use it like that..." and being ignored, since the days of Daedulus.

02.02.2026 09:02 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Making Tracks: Machynlleth Jon Gower In A Machynlleth Triad the travel writer Jan Morris suggests that Machynlleth, known by locals as Mach, β€œseems to stand there beside its river thoughtfully, perhaps just a little cynically, ...

From pub poets to pine martens, via Jan Morris and Owain GlyndΕ΅r: a joyous piece by Jon Gower on Machynlleth. What a town it is! So proud to be part of it.
nation.cymru/feature/maki...

02.02.2026 08:01 πŸ‘ 43 πŸ” 12 πŸ’¬ 1 πŸ“Œ 0