about carene...and software

[Exatem]

Come on.
And I'm a sponge. .

greetings
Marco (also peter pan, more consonant to my indol, but I would not like to give you against

Who does crocodile?

but it was not: <. and crocodile as it does..>?

However, he could do so, Mr President, not so much for the tears as well as for the grinding of teeth and the mighty and volitive jaw. .

greetings
Marco:

There's no hope, you're not a serious crew. .
Sergeant Maxopus, get your other sleeves back and roll the knuckles!
I'm going back to the tortuga. .

 

[maxopus]

to my captain's orders (the thing worries me, I never said it in my life... also because I didn't do the military)-

 

[Drag]

I do not look at the internet 1 day and unleashed the putiferio, other than crew here it is better to talk about pirates at the assembly.
Anyway, I see I've been enlisted with strength, so I can't get back.

@drag.
I don't remember if we've already talked to you but I'd like your opinion on these:http://www.vdvelden.com/rudders.cfm?pk=497〈=enThank you. . .

very interesting, I have not yet seen them mounted, I am already interested in it, to use the system in propulsion and not soltating in maneuver.
I have an ongoing study with a manufacturer of electric motors and other subjects, on alternative hybrid drive, (a similar qulcosa), I do not know if it will go well, the funds are cut more and more.
I still think that in our diporto we will never see (too expensive) that system knowing the yards.

But if we make it hybrid, I'm in and I'm in.

returning to the straquote project the hybrid drive.
:bekleiuttosto before jumping on the hull, we decide well what speed we want to do and therefore the power to install, the n° of turns and reducer, if we stay on the traditional, otherwise type of electric motor or other.
exa you who are the director of the section and then work armed with whip.:biggrin:

 

[Exatem]

cut...
Anyway, I see I've been enlisted with strength, so I can't get back. :

as it happened in the filibust, they only took volunteers...:biggrin:

skin
...I think that in our diporto we will never see (too expensive) that system knowing the yards.

returning to the straquote project the hybrid drive.
rather before jumping on the hull, we decide well what speed we want to do and therefore the power to install, the number of turns and reducer, if we stay on the traditional, otherwise type of electric motor or other.
exa you who are the director of the section and then work armed with whip.

I'm also thinking of getting on a mixed drive. it also allows you greater freedom in the internal disposition (generators on one side, mep on another...).
but as it is a game, I would like your opinion on the pump-jet. then for the bow truster, we can spend :biggrin:
Bye.

 

[Er Presidente]

the hybrid drive from many advantages, and the first is to be able to choose the rotation regime of the propeller (or the impeller) almost as you want.

p.s.: I allow myself to insist, but a pleasure gozzo that goes to 8 knots could be simple to do and very useful in the diporto in "fresh water", the lakes begin to have enough of the "scoreggioni" motor!
:smile:

 

[Drag]

but as it is a game, I would like your opinion on the pump-jet. then for bow trusters, we can spend
Bye.

personally the hydrojet drive likes (although not project), like all systems, there are advantages and disadvantages.
evident advantage, no more propeller axes and supports in water to create turbulence and friction, even if the water outlet of the hydrojet generates so much friction and losses, in fact the overall performance is difficult to calculate, precisely because of their presence, we do not forget the losses along the ducts.
all this to say that it is not possible to assess by means of performance (calculations) which is the best type of propulsion, (they should be tested on the same boat at the same speed and evaluate consumption).
Obviously the comparison can be made with surface propellers as the jet is suitable for speeds between 45-60 knots, although today you get to 40 knots.
the disadvantages are, however, the remarkable losses in the ducts with cavitation danger and in the sockets, (which if at high speed the performance seems to be better) the danger of cavitation in the impeller, which unlike the propeller should not be hollowed at all.
let us not forget the high degree of balance that must have the impeller, given the high rotation regime.
even more interesting I see the two-phase jet propulsion, where the acceleration of the fluid mass (water), instead of a hydraulic pump is obtained using a second compressible fluid (hot and pressure gas) that drags with it the main fluid vein, no more organ of movement.
ps exa all of this is beyond my competence.

Hybrid drive from many advantages

because not to put a nice kite, it seems that the saving is 20%.
Greetings and wishes to all.

 

[Er Presidente]

just as points of reflection:
- the electric drive with batteries could be interesting, but we should find a "motive" to give meaning to the whole project.
- sailing is fantastic, modern and "ethical", the energy of the wind is so much and it would be enough to discreetly move any vessel.
- if we can accumulate the energy of the wind in the batteries, we could have a "sailing boat" with all the advantages of motor drive.
- sailing has reached an unsurpassed level of specialization. but we should study a system to convert on a ship the energy of the wind into electricity to accumulate in batteries of accumulators and to use with an electric motor.
- thinking of using the energy of the wind not directly to move the boat, but to accumulate energy, perhaps a kind of horizontal wind generator could be useful, we would have energy with the wind regardless of its direction.

Starting from these assumptions, we could identify the type of native, sporty, recreational, large, small, then we could hypothesize its performance, speed and autonomy (as long as we want and at what speed we want the parent to move without wind). then we could dimension the engine (or engines) along with the propellers for the best compromise between efficiency and performance, finally we would also have a certain idea of the size of the batteries.

it would be nice to have a "bi tree" with a mw of "eolic" power to use for diporto and then, maybe even to provide energy in the dock when "parked".

p.s.: Has anyone seen waterworld?

 

[Exatem]

just as points of reflection:
- the electric drive with batteries could be interesting, but we should find a "motive" to give meaning to the whole project.
- sailing is fantastic, modern and "ethical", the energy of the wind is so much and it would be enough to discreetly move any vessel.
- if we can accumulate the energy of the wind in the batteries, we could have a "sailing boat" with all the advantages of motor drive.
- sailing has reached an unsurpassed level of specialization. but we should study a system to convert on a ship the energy of the wind into electricity to accumulate in batteries of accumulators and to use with an electric motor.
- thinking of using the energy of the wind not directly to move the boat, but to accumulate energy, perhaps a kind of horizontal wind generator could be useful, we would have energy with the wind regardless of its direction.

Starting from these assumptions, we could identify the type of native, sporty, recreational, large, small, then we could hypothesize its performance, speed and autonomy (as long as we want and at what speed we want the parent to move without wind). then we could dimension the engine (or engines) along with the propellers for the best compromise between efficiency and performance, finally we would also have a certain idea of the size of the batteries.

it would be nice to have a "bi tree" with a mw of "eolic" power to use for diporto and then, maybe even to provide energy in the dock when "parked".

p.s.: Has anyone seen waterworld?

I'm back to skiing. .
then, I press that I have seen waterworld several times and I do not intend to use the usual system of rib to distill drinking water. . .
I agree to seek, as far as possible, to "explore" new possibilities. That's why I laughed at the president when he talked about eight-foot gozzi. the nautical "pullula" of elbows of all measures (this does not mean that I would not like one that with its regular bottle of diesel, led me to lay down my beautiful palates...).
I'd like to eat. think of a megayacht from over 100 meters, in which to accommodate all the 28 moderators of cad3d, plus the administrator and those who will collaborate to the project, innovative in the lines and absolutely ecological. I'm very happy about the electric drive. the energy could be obtained from the photovoltaic and here there is to have fun in thinking about where to place panels compactly with the design, for example there are those who thought of "photovoltaic veils" combining the useful to the useful! There are hydrogen cells (if the marina lets us go 212...). the sea is immense.. .
for the hull I already have a half idea and in these days I will try to make a draft to explain it. for the motor apparatus, if we are decisive for the electric (also offer great freedom of positioning), I would like a dragon opinion on the pump-jet.
but not on the hydrojet, perhaps I explained badly, but on this (stator, rotor, etc.):
I should like to thank the rapporteur.

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[Exatem]

I forgot... I would say to open a special 3ad for our project to which who wants to participate, can join. suggest a name?

 

[sampom]

I forgot... I'd say we open a special 3ad for our project... suggest a name?

..Three men in the boat..? :biggrin:

Hello _exa_, welcome back.

greetings
Marco:smile:

 

[Exatem]

..Three men in the boat..? :biggrin:

Hello _exa_, welcome back.

greetings
Marco:smile:

Perhaps we will be 3^10.. .
Thank you very much.
between previous posts and this, I went to make a trip and, if I didn't understand badly, to produce 1kw with photovoltaic panels, it takes 7 square meters. Does anyone know anything about it?

 

[sampom]

..Three men in the boat..?

Seal saremo 3^10...

Yes,
but there was no mention of the dog.:biggrin:

 

[Er Presidente]

Perhaps we will be 3^10.. .
Thank you very much.
between previous posts and this, I went to make a trip and, if I didn't understand badly, to produce 1kw with photovoltaic panels, it takes 7 square meters. Does anyone know anything about it?

70w per square meter, average if everything is fine and only day.
I see it hard to have the necessary power, the wind can be there at night.

the photovoltaic serves, but to have the 10 kw for the services on board.
:smile:

 

[Exatem]

70w per square meter, average if everything is fine and only day.
I see it hard to have the necessary power, the wind can be there at night.

the photovoltaic serves, but to have the 10 kw for the services on board.
:smile:

I know that wind and photovoltaic put together is not enough for navigation lights... (as in "terrestrial" life).
a modern ship need much more energy... We must also think about the treatment of waste, water, the necessary and futile services, as well as the necessary equipment for navigation, instrumentation, preservation and preparation of meals, more or less ludic activities... and a thousand other things.
Hydrogen? (in combination with the above). .

 

[Er Presidente]

I know that wind and photovoltaic put together is not enough for navigation lights... (as in "terrestrial" life).
a modern ship need much more energy... We must also think about the treatment of waste, water, the necessary and futile services, as well as the necessary equipment for navigation, instrumentation, preservation and preparation of meals, more or less ludic activities... and a thousand other things.
Hydrogen? (in combination with the above). .

a clipper used 9 mw when spinning 20 knots, so the wind is able to give us this power, the problem is to develop a system that can harness the wind like a sail, but to use it to turn one or more generators.
then enough batteries.
we decide the size, performance and establish an energy balance, then we evaluate how to generate, convert and accumulate this energy in the right power.

 

[sampom]

)....

....

I understand.
Also this summer no deer port. .

greetings
Marco:biggrin:

 

[cacciatorino]

then we examine how to generate, convert and accumulate this energy in the right power.

Could an idea be to use a propeller-turbine? I mean, when I've got wind, I'm gonna drag her out of the boat, and I'm gonna load the batteries, and when the wind doesn't use it as a propeller powered by the batteries. then when I am at the bottom I use a "normal" air conditioner.

 

[Exatem]

the doubt is that the power so obtained, in any case insufficient to the size of the hull, whatever they are. I mean, it seems to me that the dog bites the tail, to have enough power I have to increase the size (of the wind turbine, of the photovoltaic panels...) but increasing the size (and the weight) I need more power, and here I start again.. .
the solution at the moment seems to be in the middle, that is a mixed propulsion but that does not lessen from the fuel. diesel alternators assisted by wind and photovoltaic, but never the latter alone, regardless of the size of the hull.
I put an article on a similar project.
as part of the seatrade exhibition of miami, the stx europa (ex- chantiers de l’atlantique) presented the eoseas project. It is a five-bridge ship for a total length of 305 meters, whose capacity is 4,300 people, of which 1,000 only crew, designed to consume 50% less fuel. the objective in fact to the base of the entire project, to which the same designers have constantly aimed, was mainly to reduce the consumption and the energy requirements of the ships of the future limiting consequently their emissions of dry gas. innovations are many and definitely futuristic. to start, the ship will be equipped with six sails distributed over the entire length, for a total of 12.440 m2 of surface, which will guarantee the propulsion of the ship to 100% in the case of strong wind zeroing the fuel consumption, and for 10% in the case of light wind. Moreover, more than 1,000 m2 of solar panels will be installed to power onboard lighting, and an air injection system aimed at reducing the friction on water by 17%, thus further reducing fuel consumption. as to the realization of the ship, the use of recyclable materials is previewed. the project, therefore, remains only to realize the transatlantic of the future, which is expected in five years. However, the construction of the ship is a challenge, not only from the technological point of view, but also from the economic one, since to develop all the proposals presented in the project it is necessary to finance 7 million euros, in addition to the costs to be supported in order to realize a ship of this type of 30% higher than the realization of a traditional ship. the designers, however, are sure that the considerable initial cost, related to the future benefits that this type of transatlantic can guarantee, will be easily absorbed in the long term thanks to the drastic reduction of fuel.regardless of the necessary figures (we can spend endless eur...) it seems to me that there are several ways to explore but at the moment, there is no alternative Total the use of fuels.
you can only try to reduce consumption by optimizing everything.

 

[Exatem]

@drag
I recovered pictures of a pump-jet made for modeling. (but the concept is the same).

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[Exatem]

to have fun a bit, I'm throwing down (very sketched) a building plan for a multihull of about 6,000 tons, about 135 meters long. to contain consumption, I designed a semiplanant hull (? until today I had only displaced) from the high coefficient of fineness (a hull "sle") which however involves a "instability" curtain of form. i.e. a hull that's a little sensitive to the ondous motion. as I thought of a boat type "small cruise ship full optional for bored caddisti", to create a stable "platform" I added two lateral floats of about 90 meters to the float thus obtaining a trimaran with modern forms (it is a bit the trend of the moment).
What do you say?
As soon as I can, I place an image of the "monster."