Good philosophy Sven. The positive flotation that the foam composite provides is a real bonus compared to so many other materials also. Thank you for today's episode.
Most production boat builders use composite or rather cored construction, mostly because it saves money. Making a boat equally stiff without core requires an elaborate system of reinforcements, which adds a lot to the cost. Also, there are the advantages as mentioned above. For small boats, cored construction is probably the best solution, but as boats get bigger, there comes a point where aluminium will be stiff enough and cheaper to build. Also, on bigger boats, where the hull moves more, the risk of delimitation on cored boats increases. For your size of boat, and for the ease of building and modifying, cored is clearly a very good option.
I agree with you that Divinycell is a fantastic material for DIY boatbuilders. However, many still use plywood, and finding the proper quality can be challenging. You still have to protect it since all boats will have water leaks sooner or later. You use lots of carbon fiber, which is excellent for strength but expensive. Cheers.
Divinycell is an excellent building material. Nothing can attack it except maybe mold. Wood unless it is potted with plastic is basically a living organism. Even when built into a house or a violin or a boat it is inspiring and expiring air and moisture. It expands and contracts. It has been used for centuries for everything. The problem I see with Divinycell is that it's made of petrochemical that pollutes as it deteriorates over many years. Sandwich construction is the best for boats as long as there's no air between layers. Air means moisture and moisture can freeze and expand. There's my 2 cents worth. Thanks Sven. I hope you had or are having a great time in Stockholm.
People building wooden boats think they are not using petrochemicals. They fool themselfes and other as wood needs a lot of paint and varnish. I say a wooden boat during its lifetime uses much more petrochmicals than a sandwich construction. I used to work in paint chimestry International paint 1954 and Royal institute of tecnology Stockholm 1958-59. Paint also use a lot of solvents 50% or so that do no god they just evaporates.
You see those vids with Thai speedboat builders using regular polypropalene foam to build their boats with COMPATIBLE resin, given that, do you think the Divinycell is so much better when you consider the high cost?
I would love to build with Divinicel but it's so expensive where I live! How'd you find an inexpensive supplier? Or are you also paying $400+ for a sheet? I want to do experiments with alternative materials. I think Cheap foam Yoga mats, Doubled to an inch thick, and sandwiched with Epoxy and fibreglass may suit.
Just watched your intervju at TV4sunday morning. (about shrinking legmuscles when out at sea) mm. For your next design, maybe put in a bipedal device that is connected to a little propeller, for days with no wind/leg excercise.
Next boat there will be abit of deck I can walk on. Also it is OK to adapt. The muscles in my upper body shrink when I am ashore and the leg muscles gets bigger. At sea it is the reverse. At sea I use my upper body on land the lower part. The adaption is quick
But Yrvind, wood, aluminum and steel can be recycled relatively easily. Composite gfk constructions not yet I think. And doesn't Composite GFK also need a lot of energy to produce these materials? And nevertheless my boat is also made of composite fiberglass, because of the many other advantages (stiffness, weight,..)
My idea is to build a boat that keeps, that does not need to be recycled after a few years. True composite needs energy to produce, but when the product is cured it does some energy contain but not very much thats why it is inert.
I never estimate time to build or expense. If I do not have the money now I bild a part and then get more money. The hull cost is only a fraction of the hole so get the best. Build small this is 20 feet. 15 feet is good for most voyages I have sailed to Newfoundland and Martinique in 15 feet boats.
He tells me to turn of the ventilation My workshop is in a 13 000 square meter building. Only a small part of it. I can not turn it of. If I could theother 12 900 square meter people would get me evicted.
Sven, there is no ideal material. There are advantages and drawbacks to each solution.... Edit. Today we should focus on Reduce, Reuse, Repair, Replant, Redistribute, Refuse, Recycle, Ride (a Real bicycle)....
There definitely are good and bad materials. Not even an idiot would build a boat in stone. Steel is good for a supertanker. Sandwich is bad for a supertanker.
@@SvenYrvindExlex when you say divinycell is good, are you taking into account the carbon /toxicity boot print? You've heard about the SS Selma or maybe those ships made of concrete that played an important role in the D-Day Normandy landing? Concrete is stone to a certain extent. As for paper, the kon tiki was composed of balsa, hemp, mangrove wood, banana leafs, bamboo.... When I wrote "all materials are good", it was understood "all appropriate materials for construction" Sven. In Japan, traditional houses made of very light materials are more "quake-proof", you won't build them on sea ice... I'm a carpenter so I guess you might have an idea which is my favourite material for smaller boats...
@@lorenzoblum868 I say Divinycell is less toxic than wood. See my comments above and below. I will make a new video explaining better. My design is for a boat for high latitudes with insulation.
Dear Sven, I really enjoy your work and learn a lot from your experience. But this time I strongly disagree with your statement, unfortunately. Epoxy resins and PVC materials are most dangerous solid chemicals ever made by humans. This is because they involve many substances with estrogenic activity like bisphenols and are very difficult to recycle. So, the long term environmental effects are simply saying devastating. This is similar story as DDT chemical that was non toxic in short term but long term effect was a disaster because of estrogenic action of DDT degradation products. From environmental safety wood is absolutely the best. I am building small dinghy that is hybrid ply and glass/epoxy and doing my project RoSSY (Research on Small Sailing Yacht) and from time to time I am presenting on my TH-cam channel some research data on micropollutants of water ecosystems. I am aware that there is no ideal solutions for building materials anyway. So, keep going and sail safe! With kind regards, Pawel Zarzycki
Paracelsius said. Poison is in everything, and no thing is without poison. The dosage makes it either a poison or a remedy. A small boat poison the world much less than a big one. My boat uses less tha 10% of the chemicals most boats use. And complex molecules breaks down into smaller ones.
@@SvenYrvindExlex Dear Sven, I know it, I am a pharmacist by education and analytical chemist with more than 33 years of practice :‐) You right, 10% of your boat is just a very small fraction of total epoxy floating through the oceans. But still, you should be aware that estrogenic like chemicals which are components of epoxy may act at pico grams level because they can accumulate in living organisms after long exposure. Anyway, I am also using epoxy, so, we are in the same club :-) Good luck! Keep going and very kind regards, Pawel
I like your channel but its a strange argument about sandwich panels.. The bottom line is that if you hit something you are almost guaranteed a hole in your boat and sending millions of microfibres into the ocean. Also, the amount of chemicals you use is nuts and it all ends in landfill in the end. I guess at your age the environment is less of a concern as I noted it wasn't one of your criteria !
Glad you brought up the subject. I have sailed many 1000 of miles during more the more than 60 years I heve been messing around with boats. So far I have not made a hole in one of my boats. As for the amount of chemicals I use. Wooden boat owners use far more chemicals in the form of paint and varnish. I worked in the International paint companys laboratory 1954 also at the royal institute of technology in stocholm at the institution for paint chemistry 1958-59. Paint and varnish typically contain 50 % solvents. Wooden boat owners keep painting their boats all the time. Paint companys love wodeen boats. Paint companys hate plastic boats.
@@SvenYrvindExlex Sorry but this argument doesn't cut it... Epoxy is a very harsh chemical which is why you cover your nose and mouth and you use it everywhere not just to varnish the surface. Also we need to move away from the narrative of "its better than" as it doesn't mean its good e.g. leaded versus unleaded fuel.
Very good. It's also sooo much simpler to cut and shape the foam, it is really wonderful to work with.
From one foam builder to another.
I'm enjoying both these project.
Good philosophy Sven. The positive flotation that the foam composite provides is a real bonus compared to so many other materials also. Thank you for today's episode.
Each day brings progress Sven - that is good to see sir.
Most production boat builders use composite or rather cored construction, mostly because it saves money. Making a boat equally stiff without core requires an elaborate system of reinforcements, which adds a lot to the cost. Also, there are the advantages as mentioned above. For small boats, cored construction is probably the best solution, but as boats get bigger, there comes a point where aluminium will be stiff enough and cheaper to build. Also, on bigger boats, where the hull moves more, the risk of delimitation on cored boats increases. For your size of boat, and for the ease of building and modifying, cored is clearly a very good option.
I agree with you that Divinycell is a fantastic material for DIY boatbuilders. However, many still use plywood, and finding the proper quality can be challenging. You still have to protect it since all boats will have water leaks sooner or later. You use lots of carbon fiber, which is excellent for strength but expensive. Cheers.
Divinycell is an excellent building material. Nothing can attack it except maybe mold. Wood unless it is potted with plastic is basically a living organism. Even when built into a house or a violin or a boat it is inspiring and expiring air and moisture. It expands and contracts. It has been used for centuries for everything. The problem I see with Divinycell is that it's made of petrochemical that pollutes as it deteriorates over many years. Sandwich construction is the best for boats as long as there's no air between layers. Air means moisture and moisture can freeze and expand. There's my 2 cents worth. Thanks Sven. I hope you had or are having a great time in Stockholm.
People building wooden boats think they are not using petrochemicals.
They fool themselfes and other as wood needs a lot of paint and varnish.
I say a wooden boat during its lifetime uses much more petrochmicals than a sandwich construction.
I used to work in paint chimestry International paint 1954 and Royal institute of tecnology Stockholm 1958-59.
Paint also use a lot of solvents 50% or so that do no god they just evaporates.
I am agree with your description about advantages of foam. It’s a reason that why a lot of planes or glider are build with this material. Thk’s
Love your videos-met you 40 years ago when you had your boat at display att Älvsjömässan. Love your boats.
Looks great! 🙏❤️🇺🇸⛵️😊
This guy know boats… i love it
I wish i would have learned about this year's ago... great information 👍
Great info! Totally agree with your point of view.
Things are looking good. Can't wait to hear how things went with your film and everything. 😁
Its good to see that People who are into shipmaking still have popular name in the world
thanks !
Thank you, good comments. Tak, Andrew
You see those vids with Thai speedboat builders using regular polypropalene foam to build their boats with COMPATIBLE resin, given that, do you think the Divinycell is so much better when you consider the high cost?
Good lesson!
I would love to build with Divinicel but it's so expensive where I live!
How'd you find an inexpensive supplier? Or are you also paying $400+ for a sheet?
I want to do experiments with alternative materials. I think Cheap foam Yoga mats, Doubled to an inch thick, and sandwiched with Epoxy and fibreglass may suit.
I do not think yoga mats will work.
There are some cheaper materials They are a bit more heavy but I do not anything about them.
😁👍
U r the best ❤
I thought you were going to make a sandwich! I guess I’ll have to wait until April 1st!
Just watched your intervju at TV4sunday morning. (about shrinking legmuscles when out at sea) mm.
For your next design, maybe put in a bipedal device that is connected to a little propeller, for days with no wind/leg excercise.
Next boat there will be abit of deck I can walk on.
Also it is OK to adapt.
The muscles in my upper body shrink when I am ashore and the leg muscles gets bigger.
At sea it is the reverse.
At sea I use my upper body on land the lower part.
The adaption is quick
Do you have any part numbers or list of your materials
What materials are you sandwiching?
Divinycell H80 for the hull and deck
But Yrvind, wood, aluminum and steel can be recycled relatively easily. Composite gfk constructions not yet I think. And doesn't Composite GFK also need a lot of energy to produce these materials? And nevertheless my boat is also made of composite fiberglass, because of the many other advantages (stiffness, weight,..)
My idea is to build a boat that keeps, that does not need to be recycled after a few years.
True composite needs energy to produce, but when the product is cured it does some energy contain but not very much thats why it is inert.
Sven - If possible, please estimate your material expenses [to date] for your sandwich construction on this project.
I never estimate time to build or expense.
If I do not have the money now I bild a part and then get more money.
The hull cost is only a fraction of the hole so get the best.
Build small this is 20 feet.
15 feet is good for most voyages I have sailed to Newfoundland and Martinique in 15 feet boats.
What is the brand name of the material you are using? Anyone out there have experience with a particular brand and would recommend it?
It's called Divinycell. I have no experience with it.
Hi Yrvind. Where can I buy a Bris Sextant?
I have to focus on the building so now I charge 1000 dollars or euro.
You can make one yourself but it will not be so pretty.
Don from GGR is mentioning your Sextant, you are getting famous.
@@chitakcheung Yrvind Island in Antarctic is named after its inventor.
Famous I will enjoy it on my upcoming long solo sail.
Inert is good
Vis du slukker vintilation under optagelser det bliver letter høre dig tak
He tells me to turn of the ventilation
My workshop is in a 13 000 square meter building.
Only a small part of it.
I can not turn it of. If I could theother 12 900 square meter people would get me evicted.
Sven, there is no ideal material. There are advantages and drawbacks to each solution....
Edit. Today we should focus on Reduce, Reuse, Repair, Replant, Redistribute, Refuse, Recycle, Ride (a Real bicycle)....
There definitely are good and bad materials.
Not even an idiot would build a boat in stone.
Steel is good for a supertanker.
Sandwich is bad for a supertanker.
@@SvenYrvindExlex when you say divinycell is good, are you taking into account the carbon /toxicity boot print?
You've heard about the SS Selma or maybe those ships made of concrete that played an important role in the D-Day Normandy landing? Concrete is stone to a certain extent. As for paper, the kon tiki was composed of balsa, hemp, mangrove wood, banana leafs, bamboo....
When I wrote "all materials are good", it was understood "all appropriate materials for construction" Sven.
In Japan, traditional houses made of very light materials are more "quake-proof", you won't build them on sea ice...
I'm a carpenter so I guess you might have an idea which is my favourite material for smaller boats...
@@lorenzoblum868 I say Divinycell is less toxic than wood. See my comments above and below.
I will make a new video explaining better.
My design is for a boat for high latitudes with insulation.
@@SvenYrvindExlex I'm an agnostic... Divinycell sounds toxic to me. ( Irony)
😢
Dear Sven, I really enjoy your work and learn a lot from your experience. But this time I strongly disagree with your statement, unfortunately. Epoxy resins and PVC materials are most dangerous solid chemicals ever made by humans. This is because they involve many substances with estrogenic activity like bisphenols and are very difficult to recycle. So, the long term environmental effects are simply saying devastating. This is similar story as DDT chemical that was non toxic in short term but long term effect was a disaster because of estrogenic action of DDT degradation products. From environmental safety wood is absolutely the best. I am building small dinghy that is hybrid ply and glass/epoxy and doing my project RoSSY (Research on Small Sailing Yacht) and from time to time I am presenting on my TH-cam channel some research data on micropollutants of water ecosystems. I am aware that there is no ideal solutions for building materials anyway. So, keep going and sail safe! With kind regards, Pawel Zarzycki
Paracelsius said.
Poison is in everything, and no thing is without poison. The dosage makes it either a poison or a remedy.
A small boat poison the world much less than a big one.
My boat uses less tha 10% of the chemicals most boats use.
And complex molecules breaks down into smaller ones.
@@SvenYrvindExlex Dear Sven, I know it, I am a pharmacist by education and analytical chemist with more than 33 years of practice :‐) You right, 10% of your boat is just a very small fraction of total epoxy floating through the oceans. But still, you should be aware that estrogenic like chemicals which are components of epoxy may act at pico grams level because they can accumulate in living organisms after long exposure. Anyway, I am also using epoxy, so, we are in the same club :-) Good luck! Keep going and very kind regards, Pawel
I like your channel but its a strange argument about sandwich panels.. The bottom line is that if you hit something you are almost guaranteed a hole in your boat and sending millions of microfibres into the ocean. Also, the amount of chemicals you use is nuts and it all ends in landfill in the end. I guess at your age the environment is less of a concern as I noted it wasn't one of your criteria !
Glad you brought up the subject.
I have sailed many 1000 of miles during more the more than 60 years I heve been messing around with boats.
So far I have not made a hole in one of my boats.
As for the amount of chemicals I use.
Wooden boat owners use far more chemicals in the form of paint and varnish.
I worked in the International paint companys laboratory 1954 also at the royal institute of technology in stocholm at the institution for paint chemistry 1958-59.
Paint and varnish typically contain 50 % solvents. Wooden boat owners keep painting their boats all the time.
Paint companys love wodeen boats.
Paint companys hate plastic boats.
@@SvenYrvindExlex Sorry but this argument doesn't cut it... Epoxy is a very harsh chemical which is why you cover your nose and mouth and you use it everywhere not just to varnish the surface. Also we need to move away from the narrative of "its better than" as it doesn't mean its good e.g. leaded versus unleaded fuel.
@@DRB68 There is no need to cover your nose and mouth. using epoxy.
I have been using since 1975 no harm.
Epoxy is not volatil