Hi Sven. Its good to see that you have chosen the name. Its good to see your numbers have worked out so well. Its also so good to see how far ahead of time your Bris design was. Thank you Sven. Looking forward. Video's en all.🎉🎉🎉
“Thanks to mathematics and calculations” :) Yes, she is very light and strong for her waterline length. That gives both extra capacity and a little extra speed. Happy situation!
Hi Sven! I assume you compared those designs by that formula using the same unit system for each boat; Some of the viewers might have thought you used 17feet for the last one (though you verbally converted that to 5.1metre). What you showed on the yellow paper might trick some viewers; It may be necessary to use the same unit system for all the designs! 😊 Thanks for sharing; I'm not much younger than you, and I get some inspiration from you!😊
I believe the IOR boats were the last racing class to be designed so that their waterline when heeled was longer than it was when they were upright. This trick was used extensively in the 19th century as a way to foil the rules which were greatly dependent on waterline length when upright.
Sven, if you do not put a Rotary vent on the top of the mast to pull the air out of the boat interior how about installing a 300mm diameter bowl with a screen covering it on the top of the unused masts and have it catch rain water. The rain water would then run down the inside of the mast and refill your empty water containers. Make a cap that seals the containers and keeps the water from overflowing when full. An open/close valve on the hose that goes from the interior mast opening to the special bottle cap to stop water and change containers. Great boat information you shared. Just thinking
@@petternorman6192 A brit milah, also known as a bris, is the Jewish ceremony in which a baby boy is circumcised. Circumcision dates back to the Book of Genesis, when God commands Abraham to circumcise himself and his offspring as a sign of the covenant between Jews and God. Throughout history, rabbis and thinkers have offered additional arguments in favor of circumcision, and many modern Jews see it as an important tradition that connects the generations.
An interesting fact: Two boats of exactly the same length and displacement can have vastly different displacement/length ratios. In fact, my personal boat has two: one when upright and one while heeled. Upright, it has a D/L of 452. Heeled it has a D/L of 181. What's the secret? The D/L measures the displacement compared to the waterline length of the boat, not its overall length. More traditional designs typically had shorter waterline lengths than more modern ones.
You sound like you know this stuff.... may I ask please how minimum viable sail area comes into play? If i know my boat lengths (wl and total) and I know the weight of each, how do i derive minimum sail area needed for adequate cruising sailing? Is the a factor or multiplier? Thank you
@@NA-su3jk La mayoría de los veleros de crucero izan 10 metros cuadrados / Toneladas de desplazamiento. Es muy complicado conseguir cifras mayores por encima de 6 metros de Eslora. Los más ligeros (Pogo 36, First 36: 300 K Euros) consiguen unos 15 metros cuadrados por Tonelada, y para alcanzar su Velocidad necesitan izar enormes Spinaker.
@NA-su3jk There is a standard formula used in the industry. It goes something like this: 1.) Find the displacement I cubic units, be they cubic deci meters (liters) or cubic feet. 2.) Find the cube root of this number. 3.) Square it. 4.) Multiply that by a number (typically 15), and that's your sail area. You can use a smaller or larger number, say, for example, 10 or 20. An y number less than 10 is considered under powered. But Sven has gotten away with as little as 4.
@@carlosduran7800 thank you... i am only dealing with very small boat designs... trying to understand designs that work well without shrouds/standing rigging... shorter masts
Is there an index or multiplier that is used - as some very rough metric - to derve minimum reasonable sail area based on the displacement calc you shared, please? Thank you
There is plenty of such thing in the books of yacht design However now there will be nearly twice as much as my previus boat that I sailed the northen North Atlantic 150 days in
Interesting. I have a Fabola campus 600, 20 ft. It is 500 kg. + me 100 kg and stuff 300 kg. = 900 kg. 0,9/(20/199)^3 = 112,5. That is an extreme light boat when sailing single handed and a couple of weeks stuff. Including beer and good food. Even with the barlast tank full 140 l the number is 130.
@@carlosduran7800 yes this 117 number is without crew and lugage, food and water. This ratio is more a performance vs comfort indicator and less a safety / ocean going capability factor right?
Appreciate this video. Maybe this suggests you could afford to add external ballast if you need to stiffen the boat for sail carrying. Would be curious to know the dellenbaugh angle compared to a paradox or something.
@@SvenYrvindExlex just curious, I didn’t know how sterile the water tanks are, water temperature also impacts bacterial growth rate. Thanks for posting daily videos, great work 👍
Why not just install a small water making system? They're not the expensive, heavy or space cumbersome. You can always carry backup water in case you have a problem with it.
120 litres for 4 months is just 1 litre a day. Can you really make do with so little, sir?? I've been told to allow 3 litres per person for each expected passage day, plus an extra 50% or so as safety margin...
Es suficiente para un bote cerrado sin exposición al viento y al sol, por ejemplo Roger Taylor, "the simple sailor", consumía alrededor de 0.75 litro por día
@@SvenYrvindExlex I'ff you have a kind of umbrella shaped system (that you can fold, like a umbrella), that you can put upside down on deck of your schip, you can catch some when the wind has settled down and its still raining. Because its on deck higher, you can use a hose to suck on and let gravity do the rest. Use 1 or 2 small hoses, its more easy to suck on. With a small rope you can prevent to loose the umbrella, but find out a way that it can not blow of your ship to easy. The umbrella can also be good to look outside your hatch when it rains, when your still filed up enough. Now Sven i heared that it will rain more in the future and also it will get more windy... Do i smell a new strong umbrella brand here? 😀
@@SvenYrvindExlex Yeah in front and after a high pressure, still... There will be enough minets left to catch some, especialy with you having all the time in the world. 😀
@@SvenYrvindExlex there is a high pressure moving past Kaap at this moment H1034 (bouncing with a L in the S), some rain in the SW/S a bit to high winds 5/6 for you to catch some. 😉
@i_Anti collision avoidance system An'na Siri Protected Auto Pilot's Robot 🤖 Toggle™🦜 A`A Spear Fisherman's Dream ☮️ Dragon Ducky Foundation four human understanding ❤ (red Cross advanced life saving instructor certification) WHAM 🐉 🐉💨
Congratulations sir to Bris Exlex, may she sail true and keep you safe.
It is beginning to dawn upon me that you are sailing from ice cream to ice cream. Very wise indeed!
Hi Sven. Its good to see that you have chosen the name. Its good to see your numbers have worked out so well. Its also so good to see how far ahead of time your Bris design was. Thank you Sven. Looking forward. Video's en all.🎉🎉🎉
Hey Captain Sven! I'm sure you'll figure it out as usual!! ✝️🙏❤️🇺🇲🇸🇪⛵️👣☘️🍍🤗
“Thanks to mathematics and calculations” :)
Yes, she is very light and strong for her waterline length. That gives both extra capacity and a little extra speed. Happy situation!
Hi Sven! I assume you compared those designs by that formula using the same unit system for each boat; Some of the viewers might have thought you used 17feet for the last one (though you verbally converted that to 5.1metre). What you showed on the yellow paper might trick some viewers; It may be necessary to use the same unit system for all the designs! 😊 Thanks for sharing; I'm not much younger than you, and I get some inspiration from you!😊
I believe the IOR boats were the last racing class to be designed so that their waterline when heeled was longer than it was when they were upright. This trick was used extensively in the 19th century as a way to foil the rules which were greatly dependent on waterline length when upright.
I want to grow old just like this❤
It will be good to see this in nz
Sven, if you do not put a Rotary vent on the top of the mast to pull the air out of the boat interior how about installing a 300mm diameter bowl with a screen covering it on the top of the unused masts and have it catch rain water. The rain water would then run down the inside of the mast and refill your empty water containers. Make a cap that seals the containers and keeps the water from overflowing when full. An open/close valve on the hose that goes from the interior mast opening to the special bottle cap to stop water and change containers. Great boat information you shared. Just thinking
I have a good design
No need to change it
"Bris" the perfect name for a boat with its tip cut off.
Please explain for a swede where Bris mean breeze.
@@petternorman6192 A brit milah, also known as a bris, is the Jewish ceremony in which a baby boy is circumcised. Circumcision dates back to the Book of Genesis, when God commands Abraham to circumcise himself and his offspring as a sign of the covenant between Jews and God. Throughout history, rabbis and thinkers have offered additional arguments in favor of circumcision, and many modern Jews see it as an important tradition that connects the generations.
Nice
What? You looked like a teenager in the picture!❤❤❤😂
I drink about 2-3 liters per day or maybe more but I’m in Texas where it’s hot but only 1 per day sounds like very little to me.
An interesting fact:
Two boats of exactly the same length and displacement can have vastly different displacement/length ratios.
In fact, my personal boat has two: one when upright and one while heeled. Upright, it has a D/L of 452. Heeled it has a D/L of 181.
What's the secret?
The D/L measures the displacement compared to the waterline length of the boat, not its overall length.
More traditional designs typically had shorter waterline lengths than more modern ones.
You sound like you know this stuff.... may I ask please how minimum viable sail area comes into play? If i know my boat lengths (wl and total) and I know the weight of each, how do i derive minimum sail area needed for adequate cruising sailing? Is the a factor or multiplier? Thank you
The secret of the Swedish Skerry Cruisers was that WL got longer when they heeled
@@NA-su3jk
La mayoría de los veleros de crucero izan 10 metros cuadrados / Toneladas de desplazamiento. Es muy complicado conseguir cifras mayores por encima de 6 metros de Eslora. Los más ligeros (Pogo 36, First 36: 300 K Euros) consiguen unos 15 metros cuadrados por Tonelada, y para alcanzar su Velocidad necesitan izar enormes Spinaker.
@NA-su3jk
There is a standard formula used in the industry. It goes something like this:
1.) Find the displacement I cubic units, be they cubic deci meters (liters) or cubic feet.
2.) Find the cube root of this number.
3.) Square it.
4.) Multiply that by a number (typically 15), and that's your sail area.
You can use a smaller or larger number, say, for example, 10 or 20.
An y number less than 10 is considered under powered.
But Sven has gotten away with as little as 4.
@@carlosduran7800 thank you... i am only dealing with very small boat designs... trying to understand designs that work well without shrouds/standing rigging... shorter masts
Is there an index or multiplier that is used - as some very rough metric - to derve minimum reasonable sail area based on the displacement calc you shared, please? Thank you
There is plenty of such thing in the books of yacht design
However now there will be nearly twice as much as my previus boat that I sailed the northen North Atlantic 150 days in
In the screaming 50's 2 dm2 is enough! ; )
Interesting. I have a Fabola campus 600, 20 ft. It is 500 kg. + me 100 kg and stuff 300 kg. = 900 kg. 0,9/(20/199)^3 = 112,5. That is an extreme light boat when sailing single handed and a couple of weeks stuff. Including beer and good food. Even with the barlast tank full 140 l the number is 130.
Yes!...you renamed her, thank goodness!...like and sub, this ol guy knows his shit❤
Hi Yrvind, what is a good range for the D/L ratio for an ocean going sailboat?
Mine originally has 117, will go up significantly though.
300 D/L - 150 D/L
Ni más pesado, ni más ligero
117 D/L con tripulación y cargado (?)
"D" = Desplazamiento con el velero navegando en el mundo real, no el Desplazamiento al salir del astillero
@@carlosduran7800 yes this 117 number is without crew and lugage, food and water.
This ratio is more a performance vs comfort indicator and less a safety / ocean going capability factor right?
Appreciate this video. Maybe this suggests you could afford to add external ballast if you need to stiffen the boat for sail carrying. Would be curious to know the dellenbaugh angle compared to a paradox or something.
The plan is to have outside ballast increase the lead from 90 to 120 kilos and deeper down.
Also the storage below bed will help a lot
Only 1 liter per day? 😬
How do you prevent the water in the jugs from spoiling and making you ill?
Water do not spoil
@@SvenYrvindExlex with bacteria it can
@@markettrader911 In more than fifty years of ocean sailing it have never happend to me nor to my friends
@@SvenYrvindExlex just curious, I didn’t know how sterile the water tanks are, water temperature also impacts bacterial growth rate. Thanks for posting daily videos, great work 👍
So the units are feet for the length of waterline and metric tonns for the displacement, right?
Right
@@SvenYrvindExlex Thank you, sir!
Why not just install a small water making system? They're not the expensive, heavy or space cumbersome. You can always carry backup water in case you have a problem with it.
Water makers keep braking down.
If I have back up water I do not need a water maker
@@SvenYrvindExlex Do you have separate tanks, in case one leaks for example?
@@solemgameinsights I do 24 of five liter and about 10 of one liter
120 litres for 4 months is just 1 litre a day. Can you really make do with so little, sir?? I've been told to allow 3 litres per person for each expected passage day, plus an extra 50% or so as safety margin...
My experience of more than 50 years with crews and solo gives 1 liter a day as plenty
Es suficiente para un bote cerrado sin exposición al viento y al sol, por ejemplo Roger Taylor, "the simple sailor", consumía alrededor de 0.75 litro por día
@@carlosduran7800 Yes, I have Roger's books too.. and I still can't understand how he manages to drink so little water. :)
Get a compact water maker and a battery pack with solar. Easy
Water makers are not to be trusted
You do not trust rainwater???
I have not have enough experience with catching it in stormy conditions.
After NZ I know more
@@SvenYrvindExlex I'ff you have a kind of umbrella shaped system (that you can fold, like a umbrella), that you can put upside down on deck of your schip, you can catch some when the wind has settled down and its still raining. Because its on deck higher, you can use a hose to suck on and let gravity do the rest. Use 1 or 2 small hoses, its more easy to suck on. With a small rope you can prevent to loose the umbrella, but find out a way that it can not blow of your ship to easy. The umbrella can also be good to look outside your hatch when it rains, when your still filed up enough. Now Sven i heared that it will rain more in the future and also it will get more windy... Do i smell a new strong umbrella brand here? 😀
@@Boca-do-rio What I think is this that in the Roaring Forties rain and strong wind comes together.
@@SvenYrvindExlex Yeah in front and after a high pressure, still... There will be enough minets left to catch some, especialy with you having all the time in the world. 😀
@@SvenYrvindExlex there is a high pressure moving past Kaap at this moment H1034 (bouncing with a L in the S), some rain in the SW/S a bit to high winds 5/6 for you to catch some. 😉
@i_Anti collision avoidance system An'na Siri Protected Auto Pilot's Robot 🤖 Toggle™🦜 A`A Spear Fisherman's Dream ☮️ Dragon Ducky Foundation four human understanding ❤ (red Cross advanced life saving instructor certification) WHAM 🐉 🐉💨