How to tune a carbon MAST with a HYDRAULIC JACK | Ep. 40
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- čas přidán 30. 10. 2022
- SAILBOAT REFIT - How to tune a carbon MAST with a HYDRAULIC JACK
In this video we tune our carbon fibre mast and rig. We were extremely lucky to have the builder of our mast, Pete Kula from Applied Composite Technologies (composites.com.au) in Australia here to help us
Our mast is approx 26m long and made of carbon fibre. It's got 3 spreaders and the standing rigging consists of 2 cap shrouds and 3 sets of diagonals (d1, d2 and d3).
Rigging on boats is usually tensioned by hand using turnbuckles. But for boats and rigging over a certain size, this is no longer possible as force needed produce so much heat that it would cause the turnbuckles to deform. In this case, a hydraulic jack is used instead.
Let's see how much force we will tune our rig to!
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Caio! We are Timo and Jo, an Italian and English couple with countless ocean miles under our belts. We're refitting an ex Vendée Globe Open 60 race boat originally designed & built & raced by famous Hungarian sailor Nándor Fa. He competed in her in the 1992 Vendée Globe (round the world single handed race known as “the Everest of the seas”), finishing 5th, becoming the first non-frenchman to finish.
We are currently in Fiji giving this old gladiator a new lease on life, transforming her from an ex race boat to a performance family cruiser, which we'll need to make both dog and baby proof! We’re planning to set sail again in Oct 2022, so with limited time&money we have plenty of challenges ahead to turn our dreams into reality&get back on the water!
Subscribe to our channel&track our progress as we release videos about our journey as well as "how to" videos about anything boat related.
Never stop to dream, never stop to sail!
You can find out more about the boat, us and our refit plans on our website www.sailingnv.com or follow us on
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#sailingnv #sailboatrefit #mast #sailboat #boatlife #Open60 #raceboat #cruising #sailingvlog #boatwork #lifeinfiji #sailingfamily #fijirefit #nandorfa #vendeeglobe #sailingblog
Things I love about your channel: (1) Jo is a real blue water sailor in her own right, and it shows. So many of the sailing channels have a male captain who is competent, knowledgeable, and experienced, with a female "first mate" who can't be bothered with the technical details and is sort of along for the ride. Jo knows her s**t, has done it herself, and is excellent at explaining what is actually happening. (2) Timo clearly know his s**t, inside and out, but is always ready to learn from others. And he never gives up. (3) Your parenting styles are so relaxed and natural. You both allow your kids to roam and explore, but keep them safe. Timo is always picking up a baby and lugging them around while he goes about his work. You have done an amazing job of integrating your family life into your boat life, which is not easy. I can't wait to see the adventures you have ahead of you all. Keep on doing what you are doing. It's working.
Hey Michael wow such a great comment thank you so much!! You’ve made our day ☺️☺️☺️ Yeah it’s been “interesting” bringing up a kid in the middle of this big refit, but as you say it’s worked pretty well so far… there’s plenty to entertain him that’s for sure ;) thanks again 🙏
This is rare footage of a master at work…Pete is one of the most knowledgeable structural engineers in the world when it comes to carbon fibre spars…
So true!!! We were extremely lucky having him onboard!!! He was awesome
Every time Jo goes Oh my God, Oh my God I think every viewer did the same 🤣 and the Look of Timo Eyes almost bulging out of his head was a picture lol. With all that mast and tension on the keel step made you think every pump will be the breaker. Fantastic to have that guy on board leading the process or not sure I could have done that without someone like him taking the lead.
Hahaha I like your comment thanks Ian :) yeah Pete was great, definitely a big relief to have had him their for this!!! Phew 😅
This has quickly become my favorite sailboat related channel.
So nice to hear thanks Sparkey!!
Same here!
the " tension" if you'll excuse the pun, is written all over the face's great episode talk about keeping us on the edge of our seats.
Haha thanks Hedley :)
Cool that guy came to tune the rig
Yeah it was so great to have him onboard!
Very funny of you guys to include clips from your earlier "experiments" removing the bearing! Best wishes.
Haha thanks yeah this jack has been put to good use!!!
Fascinating process, so good the expert travelled from Australia. Earlier I saw a video about the ex-Skip Novak boat 'Pelagic Australis' a 77 foot aluminium expedition ketch for high latitudes. The loads are scary!
Yeah was so great to have Pete with us!!! We learnt a lot. Yeah the forces are definitely humbling!
OMG!!!
Now those pressures are out of this world!!!
With a carbon mast tuned up that way, I only wish you'll be able to find some new (or slightly used) sails to get the most of your fantastic vessel...
Vai ragazzi!!! 👍
Cheers Petros so do we 🤞🤞🤞
This is amazing stuff. I am refitting a 36ft Davidson NZ design. I really like your project. And the man came to help you is a Legend!! Awesome ⛵ 🥰
Cheers Jacob, yeah Pete is amazing! He helped us so much, it was really great to have him onboard!
Really good episode!
Cheers 🍻
Loved this one guys. So fascinating to hear the sounds of all that pressure
Cheers guys, great to hear from you! Hope you’re enjoying being home :) xx
Awsome you found that guy , damn scarey that amount of tension.
Yeah Pete was awesome! And yes the forces are terrifying!!
I have to agree with MB Congratulations on surpassing 5k subs !!👋👍😁❤️
Cheers Paul 🥳 getting there… slowly ;)
The detail and determination are so admirable, a successful journey is assured...Well Done...
Cheers Trev 🍻 gd to hear from you as always :)
Great episode and something new.
Cheers 🍻
That's amazing! I am building a 1m model of NV, the LOA is 40 inches.
We use a mast jack to tune our model sailboats the same way.⛵
Wow unbelievable! Send us a photo!
That was amazing, I have never seen rigging like that before. I never realised how hardcore your rigging was, NV must be really really fast. No gonna lie, Im a bit jealous.... 😜
Thanks Rachel! Yeah rod is more common for bigger boats as it keeps the stiffness better than wire or dyneema… but it has some drawbacks which we’ll talk about in another episode!
Great stuff here...in the next one please give an indication of the load the rig will have when under sail...obviously these will rise as wind pressure increases. I understand now modern rigs on big race boats are getting sensors built in to provide live telemetry on loads the various parts of the rig is under. Amazing how much load a sailboat can be under...
Hey Eva! Sorry just finished the upload and realised I didn’t talk about this. We will definitely talk about this in a future video though. But I can say for now for example that when upwind, all the tension moves to one side of the rig. And this force increases exponentially when the boat impacts on a wave!
I can help with that. What Pete carried out is referred to as a dock tune. The design working mast compression for that boat under sail is a bit over 35 tonnes and includes the effects of things like crew weight on the rail and halyard loads.
impressive :D
Cheers Frederico 🍻🙂
che lavoro pazzesco! ci vuole proprio un ingegnere per la precisione dei calcoli che guidi un manovale per la forza applicata correttamente nei tempi e modi giusti
👍👍👍
🙏
very , vert interesting jacking up the mast ... there are a lot of equations in doing this , one would need to know what they are doing ... no job for a mug that's for sure
Yes there definitely were plenty of calculations involved and we were super grateful that the mast builder offered to come and walk us through the procedure 🙏
@@SailingNV , his information he passed onto you would be Priceless !!!
Why not use strain gauge, with this jack you can calibrate it to, than while sailing you know the load on the mast. Also can have a gauge so you never oversail it.
Oh no. Looks like you are actually at 8600 kg per side, not 8600 kg total. The two rams are in parallel seeing the same pressure so you cannot divide by two. I hope I'm missing something there, but you showed the gauge, the plumbing, and the plot. Or is the plot already for a pair of rams in parallel?
Heyhey, so the reason we divide by 2 is because the pressure that the mast feels at the base (which is the same as each piston feels - it’s the pressure in the jack system) is split between both sides of the rig… I hope that makes it clearer. And yes the plot is for our jack
The chart indicates total mast compression for a given pressure and takes into account that this is being acheived with two RC15 Enerpac rams. So all good.
Thats not longer a boat,!its a spaceship now
Haha yes timo has always wanted to be captain harlock and this is his pirate spaceship 🤦♀️… next it’ll be foils ;)
You guys need an electric pump.
And keep your fingers out from under the mast.
The drama - "no one knows" - is just not true. Boats commonly use load cells under the mast base to measure the compression while sailing.
Hydraulics operate at extremely high pressures. It is really easy to fail to recognize this when you are working on or near them. A tiny hydraulic leak can cut like a water jet (used to cut steel or granite in industry) stripping flesh from bone, or piercing the skin, creating an oil embolism in the blood stream and can be deadly.
Don't touch the hoses when they are under load, don't get your fingers in the way of the rams. Get as far away as you can anytime someone is jacking a rig.
Maybe get the baby out of there.